House Plan Direct

How to Draw a Floor Plan From Measurements

Seven steps to turn a tape-measure survey into an accurate, to-scale floor plan.

You don't need CAD experience to draw an accurate floor plan — just a tape measure (or laser measure) and a methodical approach. Work through the steps below in order, entering each measurement into the Floor Plan Creator as you go, and it will draw the plan to scale for you automatically.

  1. 1

    Measure the perimeter

    Walk the outside of the property and measure each external wall in order, so the lengths form a closed loop when you add them back up.

  2. 2

    Note the wall thickness

    Record how thick each wall is (and where its centreline sits relative to what you measured) — this affects the true internal room size, not just the overall footprint.

  3. 3

    Add the internal partitions

    Measure each internal wall the same way, room by room, including any partition that splits one room from another.

  4. 4

    Mark doors and windows

    For each opening, record its width and its position along the wall (the distance from the nearest corner works well).

  5. 5

    Check the plan closes

    Add up the wall lengths around each room and around the whole building. If the numbers do not add up to a closed shape, re-check the measurement that looks wrong before moving on.

  6. 6

    Calculate room extents

    Once every wall is in place, the internal area of each room — and the Gross Internal Area (GIA) of the whole property — can be read directly off the finished drawing.

  7. 7

    Present the finished plan

    Add room names, dimensions and a scale bar, then lay the plan out for its intended use — a working drawing, a lease plan, or a marketing floor plan.

Why the plan needs to "close"

A floor plan is a closed loop of walls. If you measure every external wall and the shape doesn't come back to where it started, one of the measurements is wrong (or a corner isn't a right angle). Catching this early — before you've added rooms, doors and windows — saves a lot of rework, which is why it's worth checking the perimeter closes before adding internal detail.

Already have a plan to check?

If you're verifying an existing PDF or image rather than measuring from scratch, use Plan Measure instead — calibrate the drawing to one known dimension and measure directly from it.

Measure an existing floor plan online →

Building a marketing floor plan?

Once your walls and rooms are drawn, use the Present workspace to lay the same plan out with room names, areas and GIA for a property listing.

See estate agent floor plans →

Ready to draw your floor plan?

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How to Draw a Floor Plan From Measurements

Seven steps to turn a tape-measure survey into an accurate, to-scale floor plan.

  1. Measure the perimeter — walk the outside of the property and measure each external wall in order, so the lengths form a closed loop.
  2. Note the wall thickness — record how thick each wall is and where its centreline sits.
  3. Add the internal partitions — measure each internal wall the same way, room by room.
  4. Mark doors and windows — record each opening's width and position along the wall.
  5. Check the plan closes — the measurements should add up to a closed shape before you add internal detail.
  6. Calculate room extents — read each room's internal area and the total Gross Internal Area (GIA) off the finished drawing.
  7. Present the finished plan — add room names, dimensions and a scale bar for its intended use.

Open the Floor Plan Creator to enter these measurements and draw the plan to scale. Already have a plan to check instead? Measure it online.