Do I Need a Building Permit?
Answer 3 quick questions to find out if your construction project needs a building permit. Our free tool checks requirements for sheds, decks, fences, pools, pergolas, garages, hot tubs, and ADUs across 50+ U.S. cities.
Interactive Permit Quiz
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How This Quiz Works
This free tool checks your city's building permit requirements in three steps. Select your project type, estimated size, and location — we cross-reference our database of 432 permit rules across 50+ cities to give you an instant answer on whether a building permit is required, what the size threshold is, estimated fees, and setback distances from property lines.
In most U.S. cities, building permits are required for sheds over 100-200 sq ft, attached decks, swimming pools, garages, and ADUs. Fences over 6 feet and pergolas with solid roofs also typically need permits. Even when a permit is not required, zoning setback rules still apply — your structure must maintain minimum distances from property lines.
Common Projects That Need Permits
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