Residential Accessory Buildings

Permit Requirements
The following items are required for obtaining a permit for a residential accessory building:
  • Permit Application Form (PDF) completed
  • Site plan showing the following:
    • Lot dimensions
    • Placement of proposed and existing buildings
    • Easements
    • Building setbacks from lot lines and easements
    • Driveway width and length
    • Drainage arrows
    • Erosion Control methods and placement
    • Location and material of construction driveway
  • Building plan showing the following:
    • Foundation
    • Floor plan of all levels
    • All rooms labeled
    • Braced wall line locations, wall bracing methods and calculations.
    • Location of any tall walls (walls exceeding 16’ in height)
  • Elevation plan showing the following:
    • Elevation drawings of all sides of the structure including any exposure
    • Height of structure above grade
    • Cross section showing foundation, wall, floor and roof components
    • Tall wall construction details
    • Details of any guards and hand railings
    • Stairway rise / run information
Tall Unsupported Walls
If any tall unsupported walls are constructed in the building which at any point exceed 16 feet in height, the walls must have supporting documentation from a Wisconsin registered architect or engineer or by an engineered lumber manufacturer (i.e. TJI, LP, Superior, etc.) showing compliance with the Code. The documentation shall be posted on site prior to the inspection of the framing. Framing will not be inspected until these walls have approved documentation.

Setback regulations for all residential zoning districts are as follows:
  • Front or street side yard - not permitted
  • Rear yard - 3 feet 0 inches
  • Interior side yard - 3 feet 0 inches
Please note: Accessory structures shall not be located closer to the front or street side property line than the principal structure. Check your zoning designation and subdivision covenants for additional requirements.

Size Restrictions
Maximum Size
Residential accessory buildings shall not exceed 1,000 square feet.

Maximum Height
The vertical distance from:
  1. The average elevation of the adjoining ground level
  2. The established grade, whichever is lower
    • To the top of the cornice of a flat roof
    • To the deck line of a mansard roof
    • To a point of the roof directly above the highest wall of a shed roof
    • To the uppermost point on a round or other arch type roof
    • To the mean distance of the highest gable on a pitched or hip roof

Helpful Resources