Arlington, TX Accessory Structures: Shed Rules (2026)

The Unified Development Code sets standards for residential sheds and detached accessory structures in Arlington. Under the Texas-adopted International Residential Code, one-story detached accessory structures not exceeding 200 square feet of floor area and without plumbing, mechanical, or electrical systems are exempt from building permit requirements. Sheds over 200 square feet, or those with electrical or plumbing, require a building permit and plan review. Even permit-exempt sheds must comply with zoning: placement is restricted to side and rear yards behind the front building line of the main house, setbacks are typically 3 feet from side and rear property lines, and maximum height is usually 15 feet for accessory structures (taller with additional setback). Total accessory building coverage combined with the primary residence cannot exceed the zoning district's maximum lot coverage, commonly 40 to 50 percent in residential zones. Sheds must be anchored to resist wind uplift per IRC, and those placed in designated floodplains require elevation or floodproofing. Electrical hookups, even to a small shed, require a permit and compliance with the National Electrical Code including GFCI protection on branch circuits. HOA architectural controls in many Arlington subdivisions restrict shed materials, colors, maximum sizes, and placement visibility from the street, often more stringently than city code. Sheds used for home occupations or commercial storage are subject to additional scrutiny.