Everything you need to know about residential building permits in your area — sheds, garages, decks, fences, ADUs, and more. Browse by state or check your specific address.
State pages are only the starting point. The permit answer that matters is the exact city, village, township, or county desk that will review the project.
2,068+ jurisdictions covered
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7,204 total jurisdictions — Answers in under 5 minutes
Each guide covers requirements, state-specific notes, and common mistakes to avoid during permit application.
Size exemptions, setback rules, height limits, foundation requirements, accessory structure permits.
Read guide →Detached garage permits, fire separation, electrical requirements, lot coverage, setbacks.
Read guide →Footings, guardrail requirements, stair codes, ledger attachment, inspection sequence.
Read guide →Height limits, corner lot sight triangles, material restrictions, property line disputes.
Read guide →Accessory dwelling unit zoning, utility connections, parking requirements, owner occupancy rules.
Read guide →Barrier requirements, electrical permits, setback rules, safety covers, inspections.
Read guide →Covered vs. uncovered, impervious surface limits, drainage requirements, permits thresholds.
Read guide →Open-side rules, fire separation, HOA restrictions, attachment to existing structures.
Read guide →Layer limits, ice barrier requirements, contractor licensing, tear-off permits.
Read guide →Multi-trade permits, inspection sequence, structural changes, electrical and plumbing.
Read guide →Electrical permits, structural load, fire access routes, HOA restrictions.
Read guide →Egress requirements, electrical, plumbing, insulation, ceiling height codes.
Read guide →Accessory building rules, electrical service, insulation, HVAC requirements.
Read guide →Navigating building permit requirements is one of the most challenging aspects of any residential construction project. Whether you're planning to build a backyard shed, a detached garage, a new deck, or finish your basement, understanding local zoning regulations, setback requirements, height restrictions, lot coverage limits, and permit fees can mean the difference between a smooth approval process and months of delays, costly redesigns, or even stop-work orders.
Building permits serve a critical public safety function. Before approving construction, local building departments review plans to verify compliance with the International Residential Code (IRC), International Building Code (IBC), local zoning ordinances, and state-specific amendments. These codes address structural integrity, fire safety, electrical systems, plumbing, mechanical equipment, energy efficiency, and accessibility.
Permits also trigger inspections at key construction milestones — footing pours, framing, rough electrical, insulation, and final completion. These inspections help ensure work meets minimum safety standards and is completed according to approved plans. Skipping permits might save time initially, but unpermitted work can lead to fines (often 2-5 times the original permit fee), forced removal or modification of completed structures, complications when selling your home, and potential insurance claim denials if unpermitted work causes damage or injury.
Zoning regulations determine how land can be used within a municipality. These rules establish what types of structures may be built, where they can be located on a property, and how large they may be. Residential zoning districts often contain unique requirements for sheds, garages, ADUs, decks, pools, and other accessory structures. Properties located in different zoning districts may have completely different development standards — a property zoned R-1 (single-family residential) might allow larger accessory buildings than one zoned R-3 (multi-family residential).
Before beginning any construction project, you should verify your property's zoning designation and review the applicable development standards. Common zoning requirements include:
Setback requirements establish the minimum distance structures must maintain from property lines, roads, easements, utility lines, and neighboring buildings. Municipalities use setbacks to preserve access for emergency vehicles, maintain adequate sunlight and airflow, protect drainage patterns, and ensure neighborhood consistency.
Most municipalities define separate setback requirements for:
Setback violations are one of the most common reasons permit applications are rejected. Many homeowners discover they've placed a shed or garage too close to a property line only after construction is complete, leading to expensive relocation or removal costs. Always verify setback requirements before finalizing your building location.
Height restrictions regulate the maximum allowable height of structures such as garages, sheds, ADUs, and home additions. These restrictions vary significantly by municipality and zoning district. Typical residential height limits range from 15 to 35 feet, with accessory structures often subject to stricter limits (10-15 feet for sheds, 15-20 feet for detached garages).
How height is measured matters. Some municipalities measure from average grade to the highest point of the roof (peak). Others measure to the mean roof height between eaves and ridge. Some apply different measurement rules depending on roof type (gable, hip, flat, or mansard). Always confirm the specific height measurement method used by your local building department before finalizing plans.
Lot coverage regulations limit the percentage of a property that may be occupied by buildings and other impervious surfaces. These requirements help municipalities manage stormwater runoff, preserve open space, maintain groundwater recharge, and prevent overcrowding.
When calculating lot coverage, most municipalities include primary dwelling footprints, detached garages and sheds, decks and patios (especially covered structures), driveways and parking areas, walkways and other paved surfaces, and pools with pool decks. Typical maximum lot coverage in residential zones ranges from 25% to 40%, depending on lot size and zoning district.
Permit fees vary dramatically between municipalities and project types. Some cities charge flat fees based on project category (shed: $75, garage: $250, deck: $150). Others calculate permit fees based on project valuation, typically charging $10-20 per $1,000 of construction cost. Complex projects may require additional fees for plan review, engineering checks, or multiple trade permits.
Approval timelines range from a few days for simple shed permits to 4-8 weeks for complex garage additions or ADUs. Larger projects often require reviews from planning departments, zoning officials, engineering teams, fire marshals, and building inspectors before approval is granted.
While the International Residential Code (IRC) provides a model framework, each state adopts its own building code amendments. Illinois has adopted the 2021 IRC with amendments, but Chicago maintains its own unique building code. Wisconsin enforces the Uniform Dwelling Code (UDC) with requirements that differ from standard IRC provisions. Indiana follows the IRC with state-specific amendments. Minnesota has adopted the 2020 Minnesota Residential Code with significant amendments for energy and frost protection.
Researching permit requirements traditionally involves searching through hundreds of pages of municipal code documents, zoning regulations, engineering standards, and permit application procedures. Homeowners often spend 4+ hours researching requirements — and still miss critical details.
Permitrust helps homeowners and contractors quickly identify zoning requirements, setback regulations, permit fees, lot coverage restrictions, height limitations, and municipal building requirements associated with a specific property address. With coverage spanning 7,200+ municipalities across Illinois, Wisconsin, Indiana, Iowa, Minnesota, and Missouri, Permitrust is the fastest way to understand what your city requires before building.
Answers to the most common questions about building permits, zoning, and code compliance
Most municipalities require permits for sheds over 120-200 square feet. Smaller sheds may be exempt from permit requirements, but setback restrictions and height limits still apply. Always check your local zoning ordinance before purchasing materials or beginning construction.
Front setbacks typically range from 20-40 feet, side setbacks 5-10 feet, and rear setbacks 10-30 feet depending on zoning district. Corner lots often have additional restrictions. Setback requirements vary significantly between municipalities, so always verify your property-specific requirements.
Permit fees vary by municipality and project valuation. Small sheds may cost $50-150, while garages and additions range from $300-1,500+. Some cities charge flat fees based on project type; others calculate fees based on construction value ($10-20 per $1,000 of valuation).
Unpermitted work can result in stop-work orders, fines (often 2-5 times the original permit fee), mandatory removal or modification of completed work, complications during home sale, potential insurance claim denials, and difficulty obtaining certificates of occupancy. Permits cost far less than fixing unpermitted work.
Approval timelines range from 1-5 days for simple shed permits to 4-8 weeks for complex garage additions or ADUs. Larger projects require reviews from planning, zoning, engineering, and building departments. Submitting complete, accurate applications with all required documents significantly reduces approval delays.
Homeowners can typically pull permits for their own owner-occupied single-family homes. However, some municipalities require licensed contractors for electrical, plumbing, or mechanical work. Check with your local building department before deciding to pull permits yourself.
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