ADU PRO evaluates zoning compliance, calculates maximum buildable area, and generates permit-ready documentation — all from a single address lookup.
From zoning verification to cost estimation, ADU PRO covers the entire pre-construction analysis pipeline.
Instantly verify if your property qualifies for an ADU based on local zoning ordinances and setback requirements.
Automatically calculate the maximum allowable square footage for your accessory dwelling based on lot size and FAR limits.
Visualize lot boundaries, setbacks, and buildable areas with interactive PostGIS-powered maps.
Get a municipality-specific checklist of permits, inspections, and documents required for your ADU project.
Receive preliminary cost estimates for construction, permits, and utility connections tailored to your region.
Browse pre-approved ADU floor plans and 3D models optimized for your lot's buildable envelope.
Type in any US property address and we'll pull parcel data and zoning overlays automatically.
Our engine checks setbacks, lot coverage, FAR, and municipal ADU ordinances in seconds.
Receive a detailed feasibility report with max sqft, estimated costs, and next steps.
Everything you need to know about California ADU laws and how our platform works.
No. Under California state law, cities cannot impose a minimum lot size requirement to permit the construction of an ADU. If you have enough space for the unit while respecting the setbacks, you can build, no matter how small your property is.
Check your lot's potential in under 1 minute →State law guarantees that you can always build an ADU of up to 800 sq ft. Depending on your city's local regulations and your property size, this limit can extend up to 1,200 sq ft. ADU PRO analyzes your specific address to give you the exact maximum allowed.
Setbacks are the mandatory minimum distance between your ADU and your property lines. In most of California, the standard is 4 feet for the side and rear property lines. Our platform automatically calculates these spaces on your map so you don't encroach on restricted areas.
Check your lot's potential in under 1 minute →Not due to "Lot Coverage". California state laws prohibit cities from applying density limits or floor area ratios (FAR) that would prevent the creation of an ADU of at least 800 sq ft.
A JADU is a smaller unit (maximum 500 sq ft) created within an existing space in your home, such as a converted attached garage or a spare bedroom. They have even simpler permitting rules and are ideal for maximizing interior spaces.
An architect or consultant might charge you between $500 and $1,500 just to tell you if your project is viable. ADU PRO gives you that answer instantly and automatically, letting you know what you can build, where, and how big, before spending a single dollar on professional floor plans.
Check your lot's potential in under 1 minute →Join thousands of homeowners and developers using ADU PRO to navigate zoning regulations effortlessly.
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