Sheds are one of the most common backyard projects homeowners undertake — and one of the most commonly done without a required permit. Most cities exempt small sheds from permit requirements, but the definition of "small" varies widely, and getting it wrong can mean fines or a removal order at resale.
The Size Threshold Rule
The most important factor for shed permits is square footage. Most cities use a threshold between 100 and 200 square feet: sheds under the limit are exempt, sheds at or above it require a permit. Common thresholds include 120 sq ft (10×12), 144 sq ft (12×12), and 200 sq ft (10×20). A few cities — including parts of California — require permits for any permanent structure regardless of size.
Height is a secondary trigger. Even a small shed that exceeds 12–15 feet in height may require a permit in cities that use both size and height thresholds.
Setback Requirements
Setbacks determine how close to your property lines a shed can be placed. Most residential zoning codes require sheds to be set back at least 5 feet from side and rear property lines, and significantly further from front property lines. In some cities, sheds must also maintain a minimum distance from the main house. Violating setback requirements — even for a permitted shed — is grounds for a removal order.
Corner lots typically have stricter setback requirements on the street-facing side yards. Always check your specific zoning district rules, not just general city guidelines.
Foundation and Anchoring Requirements
Whether your shed sits on a concrete slab, concrete piers, gravel pads, or skids matters for permit purposes. Many cities require permitted sheds to be anchored to a permanent foundation. This is especially true in hurricane-prone areas — Miami-Dade County, for example, requires all accessory structures to meet wind-load requirements regardless of size.
Sheds on skids or gravel pads are sometimes classified as temporary structures and may be exempt from permit requirements even when the same-sized shed on a slab would require one. Check whether your city distinguishes between permanent and temporary shed construction.
What the Permit Process Looks Like
For a permitted shed, you'll typically submit a site plan showing the shed location relative to property lines and the main house, plus basic construction details (dimensions, materials, foundation type). Most cities do not require engineered drawings for a standard residential shed under 200 sq ft. Expect a permit fee of $50–$200 and processing times of a few days to a few weeks depending on the city.
Prefab and Kit Sheds
Purchasing a prefabricated or kit shed doesn't exempt you from permit requirements — what matters is the size and location, not how it was built. Many big-box store shed kits are sized just under common permit thresholds (e.g., 10×12 = 120 sq ft) specifically so buyers can avoid permits in most jurisdictions. But in cities with lower thresholds, even these "permit-free" sizes may still require one.
HOA Rules
Even where no city permit is required, your HOA may prohibit certain shed sizes, materials, or colors. HOA approval is often required regardless of whether the city requires a permit. Violating HOA rules can result in fines and forced removal — independent of any city enforcement. Always check your CC&Rs before purchasing or placing a shed.
City-Specific Highlights
In Chicago, sheds up to 150 sq ft are exempt from building permits but must comply with zoning setbacks. In Los Angeles, sheds up to 120 sq ft are generally exempt if they meet setback requirements. In Houston, there are no traditional zoning ordinances, so deed restrictions control — but most residential areas restrict shed placement. In Miami, all permanent accessory structures require permits and must meet HVHZ wind standards.