Accessory Buildings

Buildings less than 120 square feet do not require a building permit unless they:
  • Are built on a permanent concrete foundation
  • Are served with electricity
  • Contain plumbing
If your building is less than 120 square feet, you are not required to obtain a building permit, but you are still required to follow the restrictions listed below.

Application Process


 A complete and accurate site plan showing the building location on the lot with respect to the existing structures and the required setbacks from the side and rear lot lines, is required with the permit application. Please review the Residential Accessory Building Guidelines (PDF) prior to beginning your project, and submit an Application for Accessory Building Permit.  If your project is between 120 and 200 square feet you may apply, instead, for an Accessory Structure Permit, which has a standard cost of $20.00

Building Restrictions


  • Accessory structure can be built in rear yards only and cannot have sidewalls over 15 feet measured from the bottom of the bottom plate to the top of the top plate. Sidewalls greater than 12 feet may alter required setbacks (see: chart below)
  • Accessory structures to a residence on a single property shall not singularly or in total exceed 7% of the total area of the lot. No accessory building may exceed an area of 6,000 square feet for every five acres of property. Multiple structures are allowed.
  • Side yard and rear yard setbacks are a minimum of three to six feet, depending on height (see chart below).  Setbacks are measured from the drip line of the building roof to the property line. No accessory structures shall be erected within ten feet of the existing house unless that structure is a swimming pool (see: swimming pool).
  • All concrete slab-on-grade (monolithic slab) foundations and conventional foundations will have a footing a minimum of eight inches thick, a minimum of 18 inches below finished grade. Wooden foundations will be constructed of pressure treated lumber.
  • Buildings with sewer and water facilities must have the respective pipe ditches separated by ten feet. Ditches for sewer and water will be a minimum of 18 feet deep.

Graduated Increase in Accessory Structure Sidewall Height

City Ordinance 405.640(c) (7)
Distance From Nearest Property Line
Maximum Sidewall Height
≥ 3 feet and < 4 feet 12 feet
≥ 4 feet and < 5 feet 13 feet
≥ 5 feet and < 6 feet 14 feet
≥ 6 feet  15 feet

Permit Fees


The permit fee for accessory buildings with an area greater than 200 square feet is calculated by the total square footage of the structure multiplied by the ICC Building Valuation Data Table formula. The fee for accessory buildings with an area of 200 square feet or less is $20.00.

More Information


Permit applications are available at the City of Republic’s Community Development Department, located at 204 North Main Avenue (across from City Hall).

To schedule inspections, please call the City’s Inspection Hot-Line at 417-732-3170. For further information, call 417-732-3150.