Convert PDF floor plan to DWG

Why PDF to DWG is harder than it looks

A floor plan PDF looks like a drawing, but to a CAD program it's almost always a picture. Even when the source was originally generated from CAD, by the time it lands in an email or a project folder as a PDF the geometry is typically flattened. It arrives embedded as a raster image inside the PDF wrapper, or as a tangle of unstructured paths with no walls, no doors, no layers.

AutoCAD's "PDF Import" reflects this honestly: bring the file in and you get an attached image, useful only as a tracing reference. The wall you can see on screen isn't a wall to AutoCAD; it's a pattern of pixels.

The standard workaround is manual redrawing. A drafter opens the PDF as an underlay, picks a corner as the origin, and traces every wall, door, window, fixture and dimension by hand onto the right layers. For a typical residential plan that's two to six hours of focused work, per sheet. On a multi-floor project it's a day's labour before any real design begins.

Tools that promise "PDF to DWG" mostly trace pixels and call it a day. The result is a single mass of polylines on one layer: walls, doors, text, the title block, all the same colour, all the same line type. Visually it resembles the original. Structurally it's useless for editing. The actual job isn't drawing the lines; it's recovering the structure, separating walls from doors from fixtures from text, putting them on named layers, keeping the scale and the dimensions honest.

How to convert a PDF floor plan to DWG in Plana

Plana's vectorization workflow recovers semantic structure: not just lines, but walls, doors, windows, fixtures and dimensions on their own DWG layers. Five steps:

1. Upload the PDF

   Drop your PDF into Plana. Multi-page PDFs are split per sheet; pick the page that contains the floor plan you want to convert. Scanned PDFs, PDFs exported from CAD, and PDFs with embedded raster images are all handled identically.

2. Confirm scale and orientation

   Plana reads the drawing scale from title-block conventions such as 1:50, 1:100, 1/4"=1', and the rest of the common notations. Confirm or override before vectorization. The scale carries through to your final DWG so dimensions stay true.

3. Run vectorization

   One click. The model extracts walls, doors, windows, fixtures and dimension annotations and assigns each element to a semantic layer. A typical residential plan takes under a minute; complex commercial sheets a few minutes more.

4. Review the layered preview

   Toggle layers on and off to verify the classification. A door read as a window, a fixture the model missed, a wall that should be two segments: each is a click to correct. More on Plana's review workflow.

5. Export to DWG

   Pick DWG from the export menu. Download and open in AutoCAD, BricsCAD, or any tool that reads DWG. The layers come through with their names intact, and the file behaves like a DWG that was authored that way, because, at this point, it was.

What the output looks like

The exported DWG follows the AIA layer-naming convention. You'll find your geometry on layers like A-WALL, A-DOOR, A-GLAZ (glazing, i.e. windows), A-FLOR-FIXT (floor fixtures), A-ANNO-DIMS for dimensions and A-ANNO-TEXT for text labels. Hiding all but one of them gives you a clean, isolated view, the way a CAD file is meant to behave.

Walls come through as polylines, closed where they bound a room. Doors and windows resolve to block references where Plana can match a stock symbol; otherwise they're geometry primitives on the right layer. Dimension annotations are preserved as editable DWG dimension entities, not exploded text, so a dimension update remeasures, instead of just changing the number.

What you don't get is a single mass of traced polylines. The difference shows up the first time you need to move a wall: it's a polyline, not an image.

Common formats: when to choose DWG vs DXF

If you're going straight into AutoCAD, BricsCAD, or another mainstream CAD package, DWG is the default. It's AutoCAD's native format and preserves the most metadata, including layer states and dimension styles. If the receiving tool doesn't read DWG, or you're hitting version compatibility friction, DXF is the safer interchange format: plain text, broader support, less surprise. Plana exports both from the same vectorization.