Accessory Structures in St. Tammany Parish, LA (2026)
3 rules for unincorporated St. Tammany Parish, Louisiana.
Verified from official government sources
ADU Rules
Unincorporated St. Tammany Parish allows one garage apartment or guest house per lot in every residential zoning district under UDC Sec. 600-6.2, capped at 1,000 square feet of habitable floor space, or up to 2,500 square feet (7.5 percent of the lot) on parcels over an acre. The unit must sit behind the main house and meet the district's primary setbacks, including the front setback on corner and through lots.
St. Tammany Parish Garage Apartment & ADU Rules
Some RestrictionsSt. Tammany Parish Code of Ordinances § 600-6.2
Garage apartment or guest houses are permitted in all residential districts and shall not exceed 1,000 square feet of habitable floor space. For lots over 1 acre in area, a guest house may be scaled to 7.5 percent of the total lot provided the guest house does not exceed 2,500 square feet of habitable floor space. All guest homes must meet the minimum primary setbacks required within the respec...
Shed & Carport Rules
Unincorporated St. Tammany Parish caps accessory buildings and sheds at 20 feet in height and 7.5 percent of the lot, or 2,500 square feet, under UDC Sec. 600-6.1. Standard setbacks run 40 feet from the front line and 10 feet from side and rear lines, dropping to 25 and 5 feet for sheds under 200 square feet or lots in the S-1/S-2 districts. Mobile homes, trailers and cargo containers cannot be used as accessory yard storage.
St. Tammany Parish Accessory Building & Shed Rules
Some RestrictionsSt. Tammany Parish Code of Ordinances § 600-6.1
Accessory structures shall be located at a minimum 40 feet from the front lot line, a minimum 10 feet from an interior rear lot line, a minimum 10 feet from an interior side lot line, and a minimum fifteen 15 feet from a side street lot line, and when located on a through lot, shall be located at a minimum 40 feet from the designated rear lot line...4.Maximum height and area.a.The height of any...
Garage Conversions
Converting garage space into living quarters in unincorporated St. Tammany Parish falls under the parish's garage-apartment rule. Sec. 600-6.2(2) caps a garage apartment or guest house at 1,000 square feet of habitable floor space, or up to 2,500 square feet on lots over an acre, and requires it to sit behind the main house and meet the zoning district's setbacks.
St. Tammany Parish garage apartment size limits
Some RestrictionsSt. Tammany Parish Code of Ordinances § 600-6.2(2)
2.Garage apartment or guest houses are permitted in all residential districts and shall not exceed 1,000 square feet of habitable floor space. For lots over 1 acre in area, a guest house may be scaled to 7.5 percent of the total lot provided the guest house does not exceed 2,500 square feet of habitable floor space. All guest homes must meet the minimum primary setbacks required within the resp...
All St. Tammany Parish ordinances
See every category we cover for St. Tammany Parish: parking, noise, fences, fires, animals, pools, and more.
St. Tammany Parish Ordinance Hub →