Home / ADU Feasibility Worksheet
Homeowners spend months talking themselves out of a project because they are not sure it is even allowed. Six numbers from your parcel and this worksheet gives you the answer most people pay a planning department for.
The defaults reflect common suburban single-family zoning: 60x110 lot, 20-foot front setback, 5-foot sides, 10-foot rear, 45% coverage cap, 1,200 sq ft ADU maximum. Your municipality varies. Get the numbers from your zoning code or your assessor page and drop them into the fields. The arithmetic does not change.
Builders and permit-expediters have a reason to tell you every project is workable. This tool is deliberately conservative: setbacks first, coverage cap second, envelope third, so the answer is the one your planner would give you rather than the one you want to hear.
Thirty minutes. Tell me where your last few customers came from and what you could handle more of. I will tell you whether marketing is your constraint or whether something else is, and I will say so plainly if it is not.