Lot Setback and Buildable Area Planner
Free architecture tool

Lot Setback and Buildable Area Planner

Enter lot size, setbacks and coverage limits to see a rough buildable area. Always confirm real limits with the city.

These tools give planning-level estimates from typical values and the details you enter. They are not quotes or engineering, legal or safety advice, and results depend on your actual property, building, rules and choices. Only a conversation and a visit can confirm what a project needs, and we give you a written estimate before design work begins.

How it works

Four quick steps.

  1. 01

    Pick a starting point

    Narrow, typical, wide or acreage lots load typical numbers.

  2. 02

    Enter your numbers

    Lot width and depth, setbacks and the coverage limit from your zoning.

  3. 03

    Choose stories

    One, two or three stories, and any other area to subtract.

  4. 04

    Read the estimate

    See a rough buildable area, footprint and floor area.

Tips

  • Use your survey for lot size and your zoning rules for setbacks.
  • Easements, trees, slopes and stream buffers can reduce what you can build.
  • We can prepare a zoning review and a site analysis for the real answer.
Questions

About this tool.

Is this exact?

No. It is a rough estimate. Overlays, height limits and easements can change it.

Where do I find setbacks?

Zoning rules list them, and a zoning review or the planning office can confirm them.

Do porches count toward coverage?

It depends on local rules. Check before you design.

Free Estimate

Ready for a design that fits how you live?

Call us and describe your project. We will look at your property, talk through ideas and give you a clear written estimate.

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