What Measurements Do You Need for a Floor Plan?

A floor plan is only as good as the measurements behind it. You do not need surveying equipment or training — a tape measure or a cheap laser measure, a pencil and a clear method are enough. This checklist covers everything to record so your sketch can be redrawn into an accurate, professional floor plan.

Wall lengths

Measure the length of every wall in every room. Work clockwise from the same corner each time so you do not skip anything. Write each measurement directly onto your sketch next to the wall it belongs to.

In a rectangular room, the two opposite walls should be the same length. In more complex rooms, the sum of the segments on one side should equal the sum on the opposite side. This simple cross-check is the fastest way to catch a mistake before it reaches the drawing.

Doors and windows

For each door and window, record:

• The width of the opening
• Roughly how far it sits from the nearest corner
• For doors, which way they open (a small arc on your sketch is perfect)

You do not need to be precise to the millimetre — a note like "window 1.2m, about 0.5m from the corner" gives us everything we need.

Stairs

Staircases are easy to oversimplify and important to get right, especially in flats, maisonettes and houses over several floors. Record:

• The overall run (length) of the staircase
• The width between the walls or banisters
• The direction (mark an "UP" arrow)

If the stairs turn, sketch each flight and landing.

Built-in storage and fixed features

Anything built in counts towards the usable space and should appear on the plan. Note the position and size of:

• Built-in wardrobes and cupboards
• Airing and utility cupboards
• Chimney breasts and alcoves

For fitted kitchens, you do not need to measure every unit — just mark the run of units and note the sink, hob and any appliances.

Ceiling heights (for planning use)

For a standard marketing plan you can skip ceiling heights. But if your plan is for a planning application, a renovation or a loft conversion, note the ceiling height in each room and the point where any sloped ceiling drops below head height.

Common measurement mistakes

• Forgetting the stairwell void on upper floors — it is not a room and should be shown as open.
• Measuring to the skirting board instead of the wall — be consistent.
• Missing alcoves and chimney breasts, which throws off the room totals.
• Not cross-checking opposing walls before leaving the property.

For more on this, see common floor plan measuring mistakes.

What happens next

Once you have your sketch and measurements, upload them to Sketchplan. Our team redraws everything into a clean, professional floor plan with rooms, dimensions and labels, and returns it ready for listings, lettings, planning or marketing. If anything is unclear, we will ask before we finish — and sensible revisions are included.