Additions, either to a dwelling or a garage, require a building permit. Construction plans should include a cross-section of the house, a floor plan, footing plans and a certificate of survey. See the addition/garage handout (PDF) for some code issues. Also, see the single-family lot guidelines (PDF) for standard setbacks from your property lines.
Note: You will be required to have smoke detectors (PDF) in all bedrooms throughout the house at the final inspection for final approval.
Involving a Contractor
If a contractor is constructing the addition, the city requires the contractor to be licensed with either the state or the city of Maplewood.
Documentation required when applying for an addition building permit: