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What is dimension in floor plan?

A dimension on a floor plan is a labeled measurement giving the real distance between two points, usually walls, openings, fixtures, or property features. It is drawn as a thin dimension line with extension lines, arrowheads or tick marks, and a number such as 12'-6", which means twelve feet, six inches.

Dimensions can describe a room's width and length, the overall exterior footprint, individual wall segments, doorway widths, window locations, cabinet runs, ceiling heights, setbacks, and more. Builders, estimators, appraisers, and homeowners use them to understand a space without measuring it in person.

The floor plan itself is a scaled, top-down view of the building. Scale keeps the drawing proportional.

A written dimension is still more reliable than scaling the page. Printing, scanning, or exporting a PDF can change the drawing size, so use the stated dimensions whenever they are given.