Every renovation job lives or dies on the survey. Get the dimensions wrong on day one and you will pay for it in mis-cut joinery, plumbing that does not line up and a client who stops trusting your numbers. This guide walks through making accurate floor plans for renovation work - measuring on site, sketching options with clients, and handing clean files to the office - using nothing but the iPhone or iPad already in your pocket.
Capture the existing space accurately
Before you can propose anything, you need a faithful record of what is already there - the as-built. The old method is a tape measure, a clipboard and a hand sketch you redraw back at the office. It works, but it is slow and easy to fumble: a transposed digit or a forgotten alcove can throw out an entire kitchen layout.
RoomPlot gives you two faster routes, and you can mix them on the same job:
- LiDAR scan - on an iPhone or iPad Pro with a LiDAR sensor, walk the room and the app detects walls, doors and windows automatically. A whole flat can be captured in minutes rather than a morning.
- Manual draw - on any supported device, draw walls by hand and type in the exact lengths from your tape. Ideal for awkward corners, or for verifying a scan against the figures you trust.
Because RoomPlot supports metric or imperial units throughout, you can work in whatever your client and your subcontractors expect - and switch between the two without re-keying anything. On-plan dimensions and a scale bar mean the measurements are always visible, not buried in a separate notebook.
Tip. Scan first for speed, then spot-check the two or three dimensions that drive the design - the run a worktop sits on, the door swing, the radiator wall - against a manual tape reading. A 30-second check on site saves a day of grief at the bench.
Sketch the options with the client in the room
The moment that wins renovation work is showing a client what their space could become, while you are standing in it. With a clean as-built loaded, you can edit the geometry directly: move, resize, rotate, add or delete any wall, door, window or opening. Knock a stud wall through and the room opens up on screen; reposition a doorway and the layout reflows.
A few habits make these on-site sessions smooth:
- Use snapping and the grid so new walls line up cleanly and you are not fighting fractions of a millimetre while a client watches.
- Lean on undo and redo to try a bold change, see the client's reaction, and step straight back if it does not land. Every edit is reversible, so experimentation costs nothing.
- Switch to 3D to show how the new layout actually feels - RoomPlot previews the same plan in 2D, 3D or wireframe, so a client who cannot read a 2D drawing still gets it instantly.
Because each change is just an edit, you can save a couple of variations and let the client choose - far more persuasive than describing the idea and hoping they picture it. For a refresher on the basics, see our guide on how to create a floor plan.
Keep the numbers exact
Renovation is unforgiving about dimensions. A cabinet run that is 40 mm too long, a beam pocket cut to the wrong centre, a soil pipe that clashes with a joist - each one is a return visit and an awkward conversation. RoomPlot keeps the figures honest in a few ways:
- Automatic area calculation - the app detects rooms and works out each area for you, so you can quote materials and labour from real square-metre figures rather than a rough guess. You can also set an area manually where you need to.
- Live dimensions on the plan - so the number you cut to is the number on the drawing, not one you reconstructed later from memory.
- Multi-select - select several elements at once to move, restyle or delete them together, or rotate the whole plan to match how the drawings will be read on site.
Handle the whole property, floor by floor
Few renovations are a single room. A loft conversion, a full refurbishment or an extension touches several storeys, and the office needs them as one coherent set. RoomPlot is built for multi-floor work: add floors, switch between them, and combine them into a single 2D plan when you need the whole building in one view. Scan the ground floor, walk upstairs, carry on - it is all one project.
That matters most when the trades downstream - structural engineer, kitchen supplier, building control - each want the property presented their own way. One project, many outputs, no re-measuring.
Hand clean files to the office and to the client
A survey is only finished when other people can use it. RoomPlot exports in the formats both halves of a renovation job actually need:
- DXF / CAD for the office or the designer - drop the plan straight into your CAD package and start detailing, instead of redrawing it from a photo of your sketch.
- USDZ 3D model when you want to share a walkthrough of the proposed space.
- Branded PDF reports for the client - with your company logo and details, so what lands in their inbox looks like it came from a professional outfit, not a phone.
The split is the point: the technical file goes one way for accuracy, the polished document goes the other for trust. You measure once, on site, and both audiences get exactly what they need.
Frequently asked questions
Do I need a LiDAR device to use RoomPlot for renovation work?
No. LiDAR scanning is faster and is available on iPhone and iPad Pro models with the sensor, but you can also draw plans by hand on a supported device and type in exact measurements from your tape. Many contractors combine the two - scan for speed, then verify the critical dimensions manually.
Can I give my CAD office an editable file?
Yes. RoomPlot exports DXF, which opens directly in standard CAD software, so your office can detail from the survey rather than tracing over an image.
How do I present options to a client on site?
Edit the geometry live - move walls, add or remove openings, reposition doors - and switch between 2D and 3D so the client can see the change clearly. Undo and redo let you trial ideas freely and back out instantly if they do not land.
Accurate floor plans for renovation do not have to mean a morning with a tape and an evening redrawing. Capture the space on your phone, shape the options with your client, and export clean files for the office and a branded report for the client - all from one survey. Download RoomPlot and turn your next site visit into a finished plan before you leave the driveway. Looking for more? Browse our more guides.