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70+ Home Size Statistics for 2026: New Homes, Existing Homes, Apartments and Measurement Rules (Updated September)
74 statistics, each checked against its original source. Last verified September 26, 2026.
This page collects 74 statistics on the size of American homes: new construction, the existing stock, listings and appraisals, apartments, manufactured homes, and the rules appraisers use to measure square footage. Every figure is cited to the organization that first published it, mostly the Census Bureau, EIA, FHFA, HUD, Fannie Mae and Freddie Mac, plus a few industry sources that publish their own survey or property data. Each statistic is written so you can quote it as it stands, with its scope and date. It is built for housing journalists, builder and proptech content teams, and anyone answering the question of how big a typical home is. If you need the square footage of one particular home, you can measure a floor plan online instead.
Key takeaways
The median new single-family home completed in the US in 2025 had 2,142 square feet of floor area. The average for the same homes was 2,378 sq ft, and the series includes homes built for rent as well as for sale. (U.S. Census Bureau, July 2026)
The average occupied US home had 1,845 square feet in 2024. EIA's estimate covers 132.54 million primary residences and counts basements plus conditioned attic and attached-garage space, so it is not the same as above-grade living area. (U.S. Energy Information Administration, March 2026)
Single-family homes started in the second quarter of 2026 had a median floor area of 2,185 square feet and an average of 2,426 square feet. Census marks this quarter as preliminary, so the figures can change when the next quarterly table is released. (U.S. Census Bureau and HUD, August 2026)
The median home listed for sale in the US in August 2026 was 1,833 square feet. A year earlier, in August 2025, the median listing was 1,844 sq ft. (Realtor.com, September 2026)
US apartments in large rental properties averaged 910 square feet in 2025, 13 square feet more than a year earlier. RentCafe's figures come from Yardi Matrix data, as of June 2026, on properties with 50 or more units. (RentCafe (Yardi Matrix data), August 2026)
New manufactured homes sold or intended for sale in 2025 averaged 1,471 square feet, with a median of 1,343 square feet. The totals include homes with more than two sections, which Census does not break out separately. (U.S. Census Bureau (sponsored by HUD), June 2026)
Starting November 2, 2026, all appraisal reports on loans sold to Fannie Mae or Freddie Mac must use the UAD 3.6 format. Broad production opened on January 26, 2026, when all lenders were allowed to submit UAD 3.6 reports. (Fannie Mae and Freddie Mac, January 2026)
New home size
New construction is the most quoted home size figure, and the Census Bureau publishes it several ways: homes started, homes completed and homes sold, each with a median and an average. The numbers below say which one they are, so you can match the series to your story.
How big new homes are now
The median new single-family home completed in the US in 2025 had 2,142 square feet of floor area. The average for the same homes was 2,378 sq ft, and the series includes homes built for rent as well as for sale. (U.S. Census Bureau, July 2026)
New single-family homes sold in 2025 had a median size of 2,194 square feet and an average of 2,409 square feet. The sold series counts only homes built for sale, so it runs a little above the completed-homes median, which also includes owner-built, contractor-built and build-to-rent homes. (U.S. Census Bureau, July 2026)
Single-family homes started in the second quarter of 2026 had a median floor area of 2,185 square feet and an average of 2,426 square feet. Census marks this quarter as preliminary, so the figures can change when the next quarterly table is released. (U.S. Census Bureau and HUD, August 2026)
Single-family homes completed in the second quarter of 2026 had a median floor area of 2,105 square feet. That is below the 2,142 sq ft median for all of 2025, though quarterly medians move around and this one is still preliminary. (U.S. Census Bureau and HUD, August 2026)
The long-run trend and the 2015 peak
The median size of new single-family homes completed peaked at 2,467 square feet in 2015. The series begins at 1,525 sq ft in 1973, and by 2025 the median had fallen back to 2,142 sq ft, 325 sq ft below the peak (our calculation). (U.S. Census Bureau, July 2026)
The typical single-family home in NAHB's 2024 Construction Cost Survey had 2,647 square feet of finished floor space. That was up 86 sq ft from 2,561 sq ft in NAHB's 2022 survey, which draws on a smaller builder sample than Census data and swings more from year to year. (National Association of Home Builders, January 2025)
Construction cost for the typical home in NAHB's 2024 survey worked out to about $162 per square foot, the highest in the history of that series. Behind that figure is an average construction cost of $428,215; land, overhead, commissions and profit are counted separately in NAHB's sales price breakdown. (National Association of Home Builders, January 2025)
Size of new single-family homes completed, 1973 to 2025 (square feet)
Show the data
| Year | Median (sq ft) | Average (sq ft) |
|---|---|---|
| 2025 | 2,142 | 2,378 |
| 2024 | 2,146 | 2,364 |
| 2023 | 2,233 | 2,485 |
| 2022 | 2,299 | 2,509 |
| 2021 | 2,273 | 2,480 |
| 2020 | 2,261 | 2,480 |
| 2019 | 2,301 | 2,509 |
| 2018 | 2,386 | 2,588 |
| 2017 | 2,426 | 2,631 |
| 2016 | 2,422 | 2,640 |
| 2015 | 2,467 | 2,687 |
| 2014 | 2,453 | 2,657 |
| 2013 | 2,384 | 2,598 |
| 2012 | 2,306 | 2,505 |
| 2011 | 2,233 | 2,480 |
| 2010 | 2,169 | 2,392 |
| 2009 | 2,135 | 2,438 |
| 2008 | 2,215 | 2,519 |
| 2007 | 2,277 | 2,521 |
| 2006 | 2,248 | 2,469 |
| 2005 | 2,227 | 2,434 |
| 2004 | 2,140 | 2,349 |
| 2003 | 2,137 | 2,330 |
| 2002 | 2,114 | 2,320 |
| 2001 | 2,103 | 2,324 |
| 2000 | 2,057 | 2,266 |
| 1999 | 2,028 | 2,223 |
| 1998 | 2,000 | 2,190 |
| 1997 | 1,975 | 2,150 |
| 1996 | 1,950 | 2,120 |
| 1995 | 1,920 | 2,095 |
| 1994 | 1,940 | 2,100 |
| 1993 | 1,945 | 2,095 |
| 1992 | 1,920 | 2,095 |
| 1991 | 1,890 | 2,075 |
| 1990 | 1,905 | 2,080 |
| 1989 | 1,850 | 2,035 |
| 1988 | 1,810 | 1,995 |
| 1987 | 1,755 | 1,905 |
| 1986 | 1,660 | 1,825 |
| 1985 | 1,605 | 1,785 |
| 1984 | 1,605 | 1,780 |
| 1983 | 1,565 | 1,725 |
| 1982 | 1,520 | 1,710 |
| 1981 | 1,550 | 1,720 |
| 1980 | 1,595 | 1,740 |
| 1979 | 1,645 | 1,760 |
| 1978 | 1,655 | 1,755 |
| 1977 | 1,610 | 1,720 |
| 1976 | 1,590 | 1,700 |
| 1975 | 1,535 | 1,645 |
| 1974 | 1,560 | 1,695 |
| 1973 | 1,525 | 1,660 |
Size by region and size band
New single-family homes completed in the Northeast in 2025 had a median of 2,459 square feet, compared with 1,969 square feet in the Midwest. The South (2,162 sq ft) and West (2,090 sq ft) fell in between; the Northeast figure has the widest margin of error of the four regions (relative standard error 5%). (U.S. Census Bureau, July 2026)
11% of new single-family homes completed in 2025 were under 1,400 square feet, and 7% were 4,000 square feet or larger. The most common size band was 1,800 to 2,399 sq ft, which held 30% of completions. (U.S. Census Bureau, July 2026)
Share of new single-family homes completed in 2025, by size (square feet)
Show the data
| Size band (sq ft) | Share of completions |
|---|---|
| Under 1,400 | 11% |
| 1,400 to 1,799 | 21% |
| 1,800 to 2,399 | 30% |
| 2,400 to 2,999 | 18% |
| 3,000 to 3,999 | 13% |
| 4,000 or more | 7% |
Lots, price and building cost per square foot
The median lot for a new single-family detached home sold in 2025 was 8,543 square feet. That was up slightly from 8,506 sq ft in 2024 and still under a fifth of an acre, based on NAHB's tabulation of Census Survey of Construction data. (National Association of Home Builders, July 2026)
New single-family homes sold in 2025 had a median price of $154.79 per square foot of floor area, excluding the value of the lot. The Northeast had the highest regional median at $229.55 and the South the lowest at $144.89. (U.S. Census Bureau, July 2026)
The existing housing stock
Most people live in homes built years or decades ago, so stock-wide figures run well below new construction. EIA's Residential Energy Consumption Survey is the main source for average size across all occupied homes; its square footage includes basements and is reported by residents, which matters when you compare it with appraisal or listing figures.
Average size of all US homes
The average occupied US home had 1,845 square feet in 2024. EIA's estimate covers 132.54 million primary residences and counts basements plus conditioned attic and attached-garage space, so it is not the same as above-grade living area. (U.S. Energy Information Administration, March 2026)
EIA's previous survey put the average US home at 1,818 square feet in 2020. That older figure is still widely repeated; EIA's 2024 survey replaces it with 1,845 sq ft across a larger stock (132.54 million homes, up from 123.53 million). (U.S. Energy Information Administration, March 2023)
US primary residences held an estimated 244.54 billion square feet of floor space in 2024. Of that, 211.57 billion sq ft was heated and 180.37 billion sq ft was cooled. (U.S. Energy Information Administration, March 2026)
Average home size by housing type, 2020 and 2024 (square feet)
Show the data
| Housing type | 2020 (sq ft) | 2024 (sq ft) |
|---|---|---|
| All homes | 1,818 | 1,845 |
| Single-family detached | 2,264 | 2,313 |
| Single-family attached | 1,615 | 1,624 |
| Mobile homes | 1,214 | 1,213 |
| Apartments, 5+ units | 905 | 918 |
| Apartments, 2 to 4 units | 978 | 887 |
By housing type, tenure and age
Single-family detached homes averaged 2,313 square feet in 2024, while apartments in buildings with five or more units averaged 918 square feet. Single-family attached homes such as townhouses averaged 1,624 sq ft, and apartments in two- to four-unit buildings averaged 887 sq ft. (U.S. Energy Information Administration, March 2026)
Owner-occupied homes averaged 2,215 square feet in 2024, about double the 1,075 square feet of rented homes. Per household member the averages were 909 sq ft for owners and 489 sq ft for renters. (U.S. Energy Information Administration, March 2026)
Homes built from 2020 to 2024 averaged 1,989 square feet, smaller than the 2,109-square-foot average for homes built from 2010 to 2019. These are averages across all housing types, so they reflect how many apartments were built in each period as well as how big houses were. (U.S. Energy Information Administration, March 2026)
Owner-occupied detached single-family homes had a median of 1,900 square feet in 2023, compared with 1,400 square feet for rented detached homes. The American Housing Survey data were collected in 2023 and published in October 2024, more than a year later, and 2023 is still the latest national edition. (U.S. Census Bureau and HUD, October 2024)
Owner-occupied attached single-unit homes such as townhouses had a median of 1,600 square feet in 2023, versus 1,100 square feet for rented ones. This housing type was home to 5.3% of owners and 7.6% of renters. (U.S. Census Bureau and HUD, October 2024)
By state
Utah had the largest average home size of any state in 2024, at 2,244 square feet. New Hampshire was second at 2,209 sq ft, and North Dakota third at 2,158 sq ft. (U.S. Energy Information Administration, March 2026)
Washington, DC had the smallest average home size in 2024, at 1,224 square feet, followed by Hawaii at 1,352 square feet. The state figures are preliminary, and EIA withheld Hawaii's heated-area estimate because it did not meet its reliability standard. (U.S. Energy Information Administration, March 2026)
California homes averaged 1,538 square feet in 2024, the second-smallest of any state after Hawaii and 307 square feet below the national average (our calculation). California also has the most occupied homes of any state in the survey, 13.78 million. (U.S. Energy Information Administration, March 2026)
Texas homes averaged 1,791 square feet in 2024 and Florida homes 1,664 square feet. In Florida the average cooled area (1,507 sq ft) was far larger than the average heated area (1,091 sq ft), the reverse of the national pattern. (U.S. Energy Information Administration, March 2026)
Average home size by state, 2024 (square feet)
Show the data
| State | Average (sq ft) |
|---|---|
| Utah | 2,244 |
| New Hampshire | 2,209 |
| North Dakota | 2,158 |
| Georgia | 2,128 |
| Iowa | 2,126 |
| Delaware | 2,080 |
| Maryland | 2,056 |
| Michigan | 2,051 |
| Virginia | 2,049 |
| South Dakota | 2,043 |
| Vermont | 2,036 |
| Pennsylvania | 2,033 |
| Indiana | 2,029 |
| Missouri | 2,029 |
| Nebraska | 2,022 |
| Connecticut | 1,994 |
| Illinois | 1,989 |
| Colorado | 1,987 |
| Minnesota | 1,980 |
| West Virginia | 1,977 |
| Wyoming | 1,977 |
| Wisconsin | 1,975 |
| North Carolina | 1,969 |
| Kentucky | 1,962 |
| Alabama | 1,959 |
| Maine | 1,957 |
| Montana | 1,951 |
| Idaho | 1,948 |
| Ohio | 1,942 |
| Kansas | 1,935 |
| South Carolina | 1,881 |
| Tennessee | 1,860 |
| Mississippi | 1,844 |
| Louisiana | 1,839 |
| Massachusetts | 1,834 |
| New Jersey | 1,801 |
| Arkansas | 1,791 |
| Texas | 1,791 |
| Rhode Island | 1,783 |
| Washington | 1,770 |
| Arizona | 1,768 |
| Alaska | 1,731 |
| Nevada | 1,705 |
| Oklahoma | 1,700 |
| Florida | 1,664 |
| Oregon | 1,615 |
| New Mexico | 1,603 |
| New York | 1,585 |
| California | 1,538 |
| Hawaii | 1,352 |
| District of Columbia | 1,224 |
Rooms and bedrooms
The median US housing unit had 5.5 rooms in 2024. 12.6% of housing units had nine or more rooms. (U.S. Census Bureau, September 2025)
38.3% of US housing units had three bedrooms in 2024, the most common bedroom count. Two-bedroom units were next at 24.8%, followed by four-bedroom units at 17.9%. (U.S. Census Bureau, September 2025)
3.1% of US housing units had no bedroom in 2024, and 5.1% had five or more bedrooms. One-bedroom units made up 10.8% of the stock. (U.S. Census Bureau, September 2025)
Homes listed, appraised and bought
Listings and appraisals describe the homes that actually trade and get financed, which is a different slice of the market from either new construction or the whole stock. Realtor.com publishes monthly listing medians, and FHFA publishes aggregate statistics from Fannie Mae and Freddie Mac appraisals.
Homes listed for sale
The median home listed for sale in the US in August 2026 was 1,833 square feet. A year earlier, in August 2025, the median listing was 1,844 sq ft. (Realtor.com, September 2026)
The median US listing measured 1,980 square feet in August 2019, compared with 1,833 square feet in August 2026. The monthly series starts in July 2016 and hit its high of 1,997 sq ft in June 2019. (Realtor.com, September 2026)
The median US listing price per square foot was $224 in August 2026. It was $228 in August 2025 and $151 in August 2019. (Realtor.com, September 2026)
Among the 100 largest US metro areas, Urban Honolulu had the smallest median listing in August 2026, at 896 square feet. Miami-Fort Lauderdale-West Palm Beach was next at 1,310 sq ft, then New York-Newark-Jersey City at 1,469 sq ft. (Realtor.com, September 2026)
Among the 100 largest US metro areas, Bridgeport-Stamford-Danbury, Connecticut had the largest median listing in August 2026, at 2,315 square feet. Salt Lake City-Murray (2,308 sq ft) and Raleigh-Cary (2,234 sq ft) followed. (Realtor.com, September 2026)
Homes appraised for GSE loans
The median appraised value was $251,000 for homes under 1,200 square feet and $900,000 for homes of 3,000 square feet or more in Q3 2024 GSE appraisals. This is a descriptive comparison, not a price-per-foot effect: larger homes also differ in location, age and quality. (Federal Housing Finance Agency, December 2024)
1.8% of GSE single-family appraisals in Q3 2024 reported an accessory dwelling unit: 15,537 of 846,684 (our calculation). Appraisals with an ADU had a median appraised value of $728,000, against $406,000 without one, a descriptive gap rather than a controlled comparison. (Federal Housing Finance Agency, December 2024)
52.5% of GSE single-family appraisals in Q3 2024 were for one-story homes: 444,132 of 846,684 (our calculation). One-story homes had a median appraised value of $352,000, compared with $492,000 for homes with more than one story. (Federal Housing Finance Agency, December 2024)
Homes bought
Older millennial buyers bought the largest homes of any generation in NAR's 2026 generational report, with a median of 2,100 square feet. The same group had the highest median household income of any buyer generation, at $132,700. (National Association of REALTORS, April 2026)
Apartments and rentals
Apartment size data comes from two kinds of source: Census counts of newly built multifamily units, and property databases that track large rental buildings. Check the scope before comparing them, because a new unit in a 50-unit building and the average rented home are not the same thing.
New multifamily units
New multifamily units completed in 2025 had a median of 1,000 square feet when built for rent and 1,170 square feet when built for sale. Census counted 484,000 multifamily units completed that year. (U.S. Census Bureau, July 2026)
Units in new multifamily buildings started in the second quarter of 2026 had a median of 1,008 square feet. For all of 2025 the median for multifamily starts was 1,025 sq ft; the 2026 quarter is preliminary. (U.S. Census Bureau and HUD, August 2026)
Apartment size by bedroom count and city
US apartments in large rental properties averaged 910 square feet in 2025, 13 square feet more than a year earlier. RentCafe's figures come from Yardi Matrix data, as of June 2026, on properties with 50 or more units. (RentCafe (Yardi Matrix data), August 2026)
In RentCafe's 2025 analysis, studio apartments averaged 460 square feet, one-bedrooms 735 square feet and two-bedrooms 1,095 square feet. Studios gained 6 sq ft over the year. (RentCafe (Yardi Matrix data), August 2026)
Three-bedroom apartments averaged 1,355 square feet in 2025 after gaining 28 square feet in a year, the largest increase of any unit type. Every unit type RentCafe tracks got slightly larger over the year. (RentCafe (Yardi Matrix data), August 2026)
Seattle had the smallest new apartments of the 100 US cities RentCafe ranked, averaging 645 square feet. Portland, Oregon was next at 665 sq ft; RentCafe counts units completed from 2016 to 2025 as new. (RentCafe (Yardi Matrix data), August 2026)
New apartments in Tallahassee, Florida averaged 1,156 square feet, the largest of the 100 US cities RentCafe ranked. Even so, Tallahassee floor plans were 27 sq ft smaller than 10 years earlier. (RentCafe (Yardi Matrix data), August 2026)
Renters and owners
Owner-occupied apartments had a median of 1,100 square feet in 2023, and rented apartments 850 square feet. Buildings with two or more apartments housed 61.0% of renters but only 4.9% of owners. (U.S. Census Bureau and HUD, October 2024)
Manufactured homes
Manufactured homes have their own Census survey and their own federal building code, which sets minimum room sizes and ceiling heights. Section count (single or double) drives most of the size difference.
Size of manufactured homes
New manufactured homes sold or intended for sale in 2025 averaged 1,471 square feet, with a median of 1,343 square feet. The totals include homes with more than two sections, which Census does not break out separately. (U.S. Census Bureau (sponsored by HUD), June 2026)
Single-section manufactured homes averaged 1,073 square feet in 2025, and double-section homes 1,766 square feet. The medians were 1,116 and 1,677 sq ft; for single-section homes the median is higher than the average. (U.S. Census Bureau (sponsored by HUD), June 2026)
New manufactured homes in the South averaged 1,540 square feet in 2025, the largest of any region, versus 1,241 square feet in the Northeast. Midwest homes averaged 1,305 sq ft and West homes 1,369 sq ft. (U.S. Census Bureau (sponsored by HUD), June 2026)
New manufactured homes averaged 1,460 square feet in 2024, compared with 2,404 square feet for new site-built single-family homes sold. Census's comparison puts manufactured homes at $84.45 per square foot and site-built structures at $168.86, with land excluded. (U.S. Census Bureau (sponsored by HUD), June 2026)
Occupied mobile homes averaged 1,213 square feet in 2024. EIA counts 6.64 million of them, about 5% of US primary residences (our calculation). (U.S. Energy Information Administration, March 2026)
Owner-occupied manufactured or mobile homes had a median of 1,200 square feet in 2023, compared with 1,000 square feet for rented ones. 6.0% of owners and 4.2% of renters lived in this type of home. (U.S. Census Bureau and HUD, October 2024)
Federal minimums in the HUD Code
Every manufactured home built to the federal HUD Code must have at least one living area of 150 square feet or more. The requirement is set by 24 CFR 3280.109, part of the federal construction and safety standards for manufactured homes. (U.S. Department of Housing and Urban Development, September 2026)
Bedrooms in HUD Code manufactured homes must have at least 50 square feet, and bedrooms for two or more people need 70 square feet plus 50 for each person beyond two. Every bedroom also needs clothes-hanging space at least 22 inches deep. (U.S. Department of Housing and Urban Development, September 2026)
Habitable rooms and bathrooms in HUD Code manufactured homes need a ceiling of at least 7 feet over at least 50% of the floor area; the rest may drop to 5 feet. Hallways and foyers need at least 6 feet 6 inches, and clearance under dropped ducts or beams must be at least 6 feet 4 inches. (U.S. Department of Housing and Urban Development, September 2026)
What buyers say they want
Stated preferences come from NAHB's What Home Buyers Really Want surveys. These are self-reported wishes, not purchases, so they are most useful next to the construction figures above.
Preferences by generation
Millennial home buyers want a median of 2,408 square feet, the most of any generation in NAHB's 2025 buyer preference study. Baby boomers want an average of 1,869 sq ft, while Gen X and Gen Z buyers want homes of about 2,250 sq ft. (National Association of Home Builders, February 2025)
70% of baby boomer buyers would choose a smaller home with better products and amenities over a larger home with fewer, according to NAHB's 2025 study. The share was 61% for Gen X, 52% for millennials and 53% for Gen Z. (National Association of Home Builders, February 2025)
Wanted size compared with built size
26% of home buyers wanted a home under 1,600 square feet, but only 16% of single-family homes started in 2023 were that small. The buyer share comes from NAHB's 2024 study of 3,008 recent and prospective buyers; it is older than two years but is the latest size-band breakdown NAHB has published. (National Association of Home Builders, August 2024)
14% of buyers wanted a home of 3,000 square feet or more, while 22% of new single-family homes started in 2023 were that large. In the same August 2024 analysis, 38% of buyers wanted 2,000 to 2,999 sq ft and 40% of new homes fell in that range. (National Association of Home Builders, August 2024)
Space per person
Square feet per person depends as much on household size as on home size. These two sources give the pieces: people per household from the American Community Survey and floor area per household member from EIA.
People per household
The average US household had 2.50 people in 2024: 2.63 in owner-occupied homes and 2.26 in renter-occupied homes. These are the latest ACS 1-year estimates; the 2025 release was not yet available when this page was checked. (U.S. Census Bureau, September 2025)
Square feet per person
US homes averaged 782 square feet per household member in 2024. One-person households averaged 1,502 sq ft per person, while households of six or more averaged 318 sq ft per person. (U.S. Energy Information Administration, March 2026)
How square footage is measured
Every figure on this page depends on what gets counted. Surveys rely on what residents report, while mortgage appraisals for Fannie Mae and Freddie Mac follow ANSI Z765-2021 and report above-grade and below-grade area separately.
What surveys count as square footage
Respondent-reported square footage was one of four 2024 RECS survey items with an item nonresponse rate above 30%. EIA turned much of that nonresponse into range answers through follow-up questions and imputed the rest, so its averages reflect what residents reported, not measured floor area. (U.S. Energy Information Administration, May 2026)
43% of US single-family homes had a basement in 2024, rising to 86% in the Northeast and 78% in the Midwest. Only 18% of single-family homes in the South and 21% in the West had one. (U.S. Energy Information Administration, September 2026)
69% of US single-family homes had an attic in 2024, and 62% had an attached garage. Attached garages were most common in the West, at 74% of single-family homes. (U.S. Energy Information Administration, September 2026)
Fannie Mae measurement rules
Fannie Mae requires appraisers to follow ANSI Z765-2021 when measuring, calculating and reporting above- and below-grade square footage. The rule applies to hybrid appraisals and to appraisals with interior and exterior inspections of attached and detached single-family homes, including manufactured homes. (Fannie Mae, June 2025)
Fannie Mae treats a whole level as below grade if any part of it is below grade, regardless of finish quality or window area. A partly below-grade walk-out with finished rooms is therefore left out of above-grade square footage and the above-grade room count. (Fannie Mae, June 2025)
Under Fannie Mae rules, apartment-style condo and co-op units are measured by interior perimeter, not with ANSI Z765. ANSI must still be used for other single-family dwellings, including townhomes and rowhouses. (Fannie Mae, June 2025)
Fannie Mae requires finished space that misses ANSI ceiling-height rules, or that is reached only through unfinished space, to be reported separately as nonstandard finished area. The appraiser must also explain why the space does not comply and acknowledge any value it adds. (Fannie Mae, June 2025)
Fannie Mae requires the output of sketching or 3D scanning software used in appraisals to conform to the ANSI standard. It also requires square footage and room counts to stay the same when the same sale is used as a comparable in more than one report. (Fannie Mae, June 2025)
UAD 3.6 appraisal reporting
Starting November 2, 2026, all appraisal reports on loans sold to Fannie Mae or Freddie Mac must use the UAD 3.6 format. Broad production opened on January 26, 2026, when all lenders were allowed to submit UAD 3.6 reports. (Fannie Mae and Freddie Mac, January 2026)
UAD 3.6 appraisal reports split a home's area into six categories: finished, nonstandard finished and unfinished area, each above and below grade. In the GSEs' worked example, a 1,000 sq ft second level where only 400 sq ft has ceilings of 7 feet or more is reported entirely as nonstandard finished area. (Fannie Mae and Freddie Mac, June 2026)
In the GSEs' ANSI job aid, an attached accessory dwelling unit is reported as its own finished above-grade area rather than added to the main home. The example pairs a 1,291 sq ft one-level home with a 728 sq ft attached ADU that is accessible from the main dwelling. (Fannie Mae and Freddie Mac, June 2026)
How consistent measurements are
Fannie Mae found GLA and lot size agreed within about 10% in 85% and 90% of cases when repeat appraisals of the same property were compared. The write-up, published in August 2024, does not say which rate belongs to GLA; the same rates held when property data collections were compared with prior appraisals. (Fannie Mae, August 2024)
Fannie Mae had approved 59 property data collection providers and processed more than 300,000 property data collections as of August 2024. Data collectors use mobile apps that generate a floor plan, and Fannie Mae says LiDAR-equipped devices can produce floor plans with gross living area measurements within minutes. (Fannie Mae, August 2024)
What these home size statistics mean in practice
For journalists and content teams: say which number you mean
"The average home" can honestly be 1,833, 1,845, 2,142 or 2,378 square feet, depending on the source. Those are the August 2026 median listing, the 2024 average of all occupied homes, and the 2025 median and average of new homes completed. The EIA figure also includes basements and is reported by residents, so it is not a living-area measurement. Name the series and whether it is a median or an average, and the number will hold up. For the basics of how the area itself is worked out, see our calculating square footage FAQ.
For builders and developers: the small end looks underbuilt
In NAHB's 2024 survey, 26% of buyers wanted a home under 1,600 square feet, but only 16% of 2023 starts were that small, and 70% of boomer buyers in the 2025 study would take a smaller home with better products and amenities. New homes have shrunk from the 2,467 sq ft peak in 2015 to a 2,142 sq ft median in 2025, yet only 11% of 2025 completions were under 1,400 sq ft. Our read is that well-finished homes under 1,600 sq ft remain the clearest gap between what buyers say and what gets built.
For lenders and appraisers: measurement rules move the number
Fannie Mae counts a whole level as below grade if any part of it is, and it requires finished space that misses ANSI ceiling rules to be reported separately. With basements in 86% of Northeast single-family homes, the gap between a survey figure and appraised above-grade area can be large, so the two should not be compared directly. UAD 3.6 becomes mandatory for GSE loans on November 2, 2026, with six separate area categories. Our GLA and appraisal rules FAQ covers how each area type is treated.
For apartment, condo and interior design writers: check the unit type
Apartments in large rental properties average 910 sq ft, studios 460 sq ft and two-bedrooms 1,095 sq ft, while the AHS puts the median rented unit in an apartment building at 850 sq ft. Condo units are measured differently too: Fannie Mae requires interior perimeter measurements for apartment-style units, not ANSI. Our measuring by property type FAQ explains the differences for condos, townhomes and manufactured homes.
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Upload Floor PlanMethodology and sources
We evaluated 126 candidate statistics and kept 74. The 52 we rejected were mostly figures that a newer edition of the same study has replaced, figures we could not trace to an original publisher, sources that blocked access or sit behind a login or paywall, and duplicates or figures outside the scope of this page. A few more were cut to keep any single publication at about six statistics.
Every statistic here is cited to the organization that first published it, linked to the deepest page, PDF or data file that contains it, and was fetched during our last check. We saved the text of each source and searched it by script for every number we cite. All 74 passed; the first run flagged five, and all five were formatting mismatches in the script (CSV separators and trailing decimals) that we then confirmed by hand. RentCafe blocks automated downloads, so its figures were confirmed from two separate readings of the live page. Figures from the Census Data API and the AHS infographic were checked against the underlying API response and the rendered image.
Citations give the publication month and year. Where data were collected more than a year before publication, or a source is more than two years old, the statistic says so. Five statistics come from three sources older than 24 months, and none from sources older than five years. Percentages marked "our calculation" are simple divisions or differences of published figures, with the arithmetic recorded in our verification log. Surveys of residents and buyers are self-reported, and comparisons across appraisal groups are descriptive, not causal. Last verified September 26, 2026. To check how a figure applies to one home, the MeasureFloorPlan tool measures floor area from a plan.
Source list
- U.S. Census Bureau: Characteristics of New Housing 2025 (square feet, price per square foot, highlights) (July 2026)
- U.S. Census Bureau and HUD: New Residential Construction, quarterly starts and completions by purpose and design (August 2026)
- U.S. Census Bureau and HUD: 2023 American Housing Survey, Profile of Owners and Renters (October 2024)
- U.S. Census Bureau: American Community Survey 2024 1-year, DP04 Selected Housing Characteristics (September 2025)
- U.S. Census Bureau: American Community Survey 2024 1-year, B25010 Average Household Size by Tenure (September 2025)
- U.S. Census Bureau: Manufactured Housing Survey, annual square footage and cost comparison tables (June 2026)
- U.S. Energy Information Administration: 2024 RECS Table HC10.9, Average square footage of U.S. homes (preliminary) (March 2026)
- U.S. Energy Information Administration: 2024 RECS state square footage table (preliminary) (March 2026)
- U.S. Energy Information Administration: 2024 RECS housing characteristics highlights (September 2026)
- U.S. Energy Information Administration: 2024 RECS technical documentation, housing characteristics (May 2026)
- U.S. Energy Information Administration: 2020 RECS Table HC10.9, Average square footage of U.S. homes (March 2023)
- Federal Housing Finance Agency: UAD Aggregate Statistics, Enterprise single-family national file (December 2024)
- Realtor.com: Residential listings data, national and metro inventory history (September 2026)
- National Association of REALTORS: Home Buyers and Sellers Generational Trends 2026, press release (April 2026)
- National Association of Home Builders: Affordability Headwinds Driving Home Buyers' Interest in Smaller, More Personalized Homes in 2025 (February 2025)
- National Association of Home Builders: Home Sizes: Demand vs. Supply (August 2024)
- National Association of Home Builders: Lot Sizes for New Homes Remained Near Historic Lows in 2025 (July 2026)
- National Association of Home Builders: Cost of Constructing a Home, 2024 (January 2025)
- RentCafe (Yardi Matrix data): U.S. apartment sizes are growing: Where are renters gaining the most space? (August 2026)
- Fannie Mae: Selling Guide B4-1.3-05, Improvements Section of the Appraisal Report (June 2025)
- Fannie Mae: Advancing Collateral Valuation: A Data-Driven Approach with Standardized Property Data Collection (August 2024)
- Fannie Mae and Freddie Mac: UAD 3.6 broad production announcement (January 2026)
- Fannie Mae and Freddie Mac: UAD 3.6 Job Aid: ANSI Reporting Requirements (June 2026)
- U.S. Department of Housing and Urban Development: 24 CFR 3280.104 and 3280.109, Manufactured Home Construction and Safety Standards (eCFR) (September 2026)