Best Free CAD Software for House Plans in 2026

What to Look for in Free CAD Software for House Plans

A house plan is more than a drawing. It has to be exact, it has to work in 2D and 3D, and sooner or later someone else needs to read it: a builder, an engineer or the building department. Before you invest weeks in learning a free program, check these points:

• Walls or lines: does the program know what a wall, a door and a window are, or do you draw every edge yourself?
• Roofs, stairs and foundations: these are the hardest parts of a house to draw by hand. Very few free tools build them for you.
• Drawings from the model: sections, elevations and plan sheets should come from the same model, so a change does not mean redrawing everything.
• File exchange: DWG and DXF are the formats architects and engineers use. Some free tools only read and write DXF, others neither.
• License terms: several free versions may only be used for personal, non-commercial projects. That matters if you are a contractor or plan to sell the house.
• Learning time: free software costs nothing to buy, but a steep learning curve costs weeks. For a single house project, time is often the bigger expense.

Drawing Lines vs. Planning Walls: The Key Difference

Most free CAD software is drawing software. LibreCAD and QCAD create lines, arcs and hatches, and SketchUp Free creates edges and faces. The program does not know whether those lines are a wall, a window or a roof. Plan7Architect works with real building elements: a wall has a thickness, layers and a height, a window creates its own opening, and the program knows how walls, floors and roofs connect. This is what decides how long a house plan takes:

1. Plan7Architect: Best Low-Cost Option for Complete House Plans

Price: $259.99 Original price was: $259.99.$169.99Current price is: $169.99. one-time purchase, lifetime license, no subscription (not free)
Platform: Windows desktop software
Best for: homeowners, self-builders and contractors who want to plan a complete house, from the first wall to the permit drawings

Plan7Architect is not free CAD software, and we list it first for a simple reason: it is the point where free tools stop being enough. It is a dedicated house planning program made for beginners without CAD experience. You do not draw lines. You place walls, floors, ceilings, roofs, stairs and foundations, and every change in the floor plan updates the 3D model, the sections and the elevations at the same time.

A Complete House Instead of a Drawing

You enter exact lengths, angles and distances, build walls from several layers and place doors and windows with exact sizes. Dimensions are created automatically, and living and usable areas are calculated for you. You can work in feet and inches or in meters and switch at any time. Unlimited floors and buildings fit into one project, so a house with a detached garage or a guest house stays in one file.

The Parts Free Tools Leave to You

The tools that take the most time in free CAD software are built in:

• Automatic roof construction for gable, hip, shed, flat and mansard roofs, including dormers
• Terrain modeling with contour lines and sloped lots
• Foundations, slabs, beams and stairs
• Timber construction tools and custom beam structures
• Electrical, heating and plumbing planning
• Decks, terraces, balconies and railings
• Layer management and plan variants for comparing different designs

Permit Drawings and DWG Export

Sections, elevations and plan sheets with title blocks are created from your model, which makes building permit drawings much simpler to put together. You can print to scale, save as PDF or exchange DWG and DXF files with your architect or engineer. For a closer look at the drawing side, see our guide on creating floor plans with dimensions.

3D Walkthrough and Photorealistic Images

You can walk through the house in 3D at any time and furnish it from an extensive object library, including models imported from the SketchUp 3D Warehouse. For photorealistic images and videos, you export the model to Twinmotion with all textures.

Pricing

Plan7Architect Pro costs $259.99 Original price was: $259.99.$169.99Current price is: $169.99. once and can be activated on up to 3 PCs. That is less than one year of a paid CAD subscription: AutoCAD LT costs $540 per year and SketchUp Pro $399 per year, so three years of SketchUp Pro add up to $1,197. Every purchase includes a 14-day right of withdrawal, so you can cancel by email if the program is not right for your project.

2. FreeCAD: Best Free CAD Software for House Plans with BIM Tools

Price: free, open source
Platform: Windows, Mac and Linux
Best for: technical users who want a free program with real building elements and are willing to invest time

FreeCAD is the most complete free option for architecture. Its BIM workbench adds walls, windows, doors, stairs, structures and spaces, sections come from the model, and plan sheets are made in the TechDraw workbench. Version 1.1, released in March 2026, brought many usability improvements. It reads and writes DXF and IFC, and DWG works through an external converter.

The price for all of this is time. FreeCAD is a parametric engineering program first, the interface is technical, the roof tool is basic, and dimensions and sheets are set up by hand. For a complete house, expect a long learning phase. Read more in our FreeCAD alternative comparison.

3. Sweet Home 3D: Best Free Option for Simple Floor Plans and Furnishing

Price: free, open source
Platform: Windows, Mac, Linux and a browser version
Best for: homeowners who want to lay out and furnish rooms quickly

Sweet Home 3D is the easiest free tool on this list. You draw walls and rooms in 2D, place doors, windows and furniture from a catalog and see the result in 3D right away. Room areas are shown, and photo rendering is built in. For trying out a layout or furnishing an apartment, it is excellent.

As CAD software for a house, it reaches its limits quickly: there is no real roof tool without plugins, no terrain, no foundations, no sections or elevations and no DWG exchange. See our Sweet Home 3D alternative page for a detailed comparison.

4. SketchUp Free: Best Free 3D Modeling in the Browser

Price: free web version, not for commercial use; paid plans from $129 per year (Go), Pro $399 per year
Platform: web browser
Best for: quick 3D concepts and massing models for personal projects

SketchUp Free runs in the browser, is quick to learn and gives you access to the huge 3D Warehouse of ready-made models. For visualizing an idea, a deck or a room in 3D, it is a good free tool, and it comes with 10 GB of cloud storage.

For house plans, the free version is limited. Walls are geometry you draw yourself, there is no LayOut for plan sheets, no DWG or DXF exchange and no extensions. SketchUp states that the free version is not for commercial use, so contractors need a paid plan.

5. LibreCAD: Best Free 2D CAD for DXF Drawings

Price: free, open source
Platform: Windows, Mac and Linux
Best for: precise 2D drawings, details and simple plans in DXF format

LibreCAD is a lightweight 2D drafting program with layers, blocks, snaps and dimension tools. It uses DXF as its native format, which makes it easy to exchange drawings with other CAD programs, and it runs well even on older computers.

LibreCAD is a pure 2D tool, so there is no 3D view at all. A floor plan is a collection of lines that you draw, dimension and update by hand, and sections and elevations have to be drawn separately.

6. QCAD: Best Free 2D CAD with an Inexpensive Pro Upgrade

Price: Community Edition free, open source; QCAD Professional $48 one-time including one year of updates
Platform: Windows, Mac and Linux
Best for: 2D drafting with a clean interface and optional DWG support

QCAD is similar to LibreCAD but more polished, with a large part library of over 5,000 CAD parts. The free Community Edition works with DXF, and QCAD Professional adds DWG support for a small one-time price. Another free option for DWG files is nanoCAD Free, a legacy version 5 that reads and writes DWG up to the 2013 format, is limited to non-commercial use and is not guaranteed to run on Windows 10 or 11.

The limits for a house are the same as with every 2D drafting tool: no walls, no 3D model, no automatic sections and no roof tools. Everything is drawn line by line.

7. Blender with Bonsai: Best Free Open BIM Toolkit for Advanced Users

Price: free, open source
Platform: Windows, Mac and Linux
Best for: 3D artists and BIM enthusiasts who want IFC models and high-end rendering at no cost

Blender is the most powerful free 3D program, and the Bonsai add-on, formerly BlenderBIM, turns it into an open BIM tool. You can create IFC models with walls and other building elements, calculate quantities and generate 2D drawings and sheets from the model. Rendering with Cycles is outstanding.

The combination is aimed at experienced users. Blender itself has a steep learning curve, Bonsai describes itself as alpha software, and a full house with roof, stairs and permit drawings takes a lot of manual work.

8. Onshape Free: Free Cloud CAD for Non-Commercial Projects

Price: free plan for non-commercial use, all documents public; Standard $1,500 per year
Platform: web browser and mobile apps
Best for: hobbyists who want professional parametric 3D CAD in the browser

Onshape is a professional parametric CAD system that runs completely in the browser. The free plan gives you the full modeling tools, which makes it popular for furniture, cabinetry, small structures and 3D printing.

Onshape is made for mechanical and product design, not architecture. There are no walls, roofs or floor plan tools, and on the free plan every document is public, which most people do not want for the plans of their own house.

How to Choose the Right Free CAD Software

• You want a complete house plan with roof, foundation and permit drawings: Plan7Architect is the fastest route for a one-time $259.99 Original price was: $259.99.$169.99Current price is: $169.99., with a 14-day right of withdrawal.
• You want real BIM tools for free and have time to learn: FreeCAD with its BIM workbench.
• You only want to lay out and furnish rooms: Sweet Home 3D is the easiest free choice.
• You need precise 2D drawings in DXF or DWG: LibreCAD for free, or QCAD Professional for $48 if you need DWG.
• You mainly want 3D concepts or renderings: SketchUp Free for personal projects, Blender for high-end visuals.

For more free options focused on home design rather than CAD, see our comparison of free home design software.

Plan Your House with Plan7Architect

Free CAD software is a good way to start, but a complete house needs walls, roofs, stairs, foundations and drawings that stay in sync. Plan7Architect gives you all of that in one program made for beginners, with video tutorials, DWG and DXF exchange and permit drawings, for a one-time price of $259.99 Original price was: $259.99.$169.99Current price is: $169.99.. Every purchase comes with a 14-day right of withdrawal, so if the software is not what you expected, you can simply cancel your purchase by email.