Garage conversion rules in Eagan, MN — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Eagan regulates garages as accessory buildings. Detached garages over 200 square feet need a building permit and must meet residential setbacks. Total detached accessory floor area is capped (576 sq ft with an attached garage, 800 sq ft without), and converting garage space to living area is subject to ADU and building-code rules.
Under Eagan's Accessory Buildings and Garages handout, a private garage is an accessory building (or part of the principal building) for storing the residents' private vehicles. A building permit is required to construct a garage exceeding 200 square feet; smaller accessory structures need a zoning permit. Detached garages follow the same residential setbacks as other accessory buildings: 5-foot side and rear in R-1/R-2 (10 feet in Estate) and 30 feet from the front yard/right-of-way. Floor-area caps limit how much detached garage/accessory space a lot can have: for homes with an attached garage, the total floor area of all detached accessory structures cannot exceed 576 square feet; for homes without an attached garage, the cap is 800 square feet. The height of an attached garage cannot exceed the height of the dwelling, and the inside wall height of a detached accessory structure cannot exceed 11 feet. Converting a garage into living space (for example a bedroom or apartment) effectively creates additional dwelling area; if it produces a separate dwelling unit, Eagan's ADU rules in the R-1/Estate districts apply, including registration, size, parking and owner-occupancy requirements. Any conversion also requires building permits and code-compliant separation, insulation, and egress. Confirm with Eagan Building Inspections at 651-675-5675 and Planning at 651-675-5685.
Converting or building garage space without permits, exceeding the 576/800-square-foot detached accessory floor-area caps, violating setbacks, or creating a second dwelling unit that does not meet Eagan's ADU registration and standards can result in stop-work and enforcement actions.
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