Do I need a permit to build a deck in Ann Arbor, MI?

Yes, in most cases you will need a building permit to build a deck in Ann Arbor. The city requires a permit for any deck that is attached to the house, exceeds 200 square feet in area, or is elevated more than 30 inches above grade. As part of the permit application, you will need to submit a site plan showing the deck's location on your lot, its dimensions, and the setbacks from all property lines. Decks in historic districts also require review by the Historic District Commission before a permit can be issued. Unpermitted decks can create problems when you sell your home and may result in fines or required removal.

What does Ann Arbor require on a residential site plan?

Ann Arbor's Building and Rental Services office requires that a residential site plan include several key elements: the property boundaries with dimensions, a north arrow, a graphic scale, the location and footprint of all existing structures, the location and dimensions of the proposed improvement, setback distances from all property lines, easements and rights-of-way, driveways and walkways, and significant trees (five inches DBH or larger). For projects near the Huron River, floodplain information may also be required. The plan must be drawn to scale, typically 1 inch equals 10 or 20 feet for most residential lots. Incomplete or unscaled site plans are one of the most common reasons applications are returned.

How long does it take to get a building permit approved in Ann Arbor?

For standard residential projects in Ann Arbor, plan review typically takes 10 to 15 business days from the date of a complete application submission. However, projects that require additional review can take considerably longer. If your property is in a locally designated historic district, the Historic District Commission meets on a regular schedule and you may need to wait for the next available meeting. Projects requiring a variance from the Zoning Board of Appeals add additional weeks to the timeline. Submitting a complete, accurate application with a well-prepared site plan is the best way to avoid delays. Incomplete applications are returned and restart the review clock.

How much does a building permit cost in Ann Arbor?

Permit fees in Ann Arbor are calculated based on the type of project and its estimated construction valuation. Minor permits for small structures or trade work can cost less than $100, while permits for larger additions, new detached garages, or accessory dwelling units can run several hundred to over a thousand dollars depending on project scope. There may also be separate fees for zoning review, tree removal permits, or right-of-way permits if your project affects the public sidewalk or driveway apron. The city's E-TrakIt portal provides fee estimates during the application process. For a precise fee quote, contact Ann Arbor Building and Rental Services at (734) 794-6263.

Can I draw my own site plan in Ann Arbor, or do I need a licensed surveyor?

For most standard residential permit applications in Ann Arbor, you are not required to hire a licensed surveyor or engineer to prepare your site plan. Homeowners and contractors can draw their own site plans as long as the drawing meets the city's requirements: drawn to scale, showing all required elements, and accurately reflecting lot dimensions and structure locations. However, if you do not have a recent survey of your property, you may need to obtain one to confirm lot boundaries and easements before drawing your plan. For complex projects, ADUs, or work in floodplain areas, professional preparation is strongly recommended. Tools like Site Plan Creator can help non-professionals produce compliant drawings.

What are the setback requirements for residential properties in Ann Arbor?

Setback requirements in Ann Arbor vary by zoning district. In common single-family residential zones (R1 through R4), front yard setbacks are typically 20 to 25 feet from the front property line. Side yard setbacks generally range from 4 to 6 feet, with larger setbacks required on corner lots for the street-facing side. Rear yard setbacks are often 25 to 30 percent of lot depth, with a minimum of 20 feet in most districts. Accessory structures like detached garages and sheds may be placed closer to rear and side lot lines, sometimes within 3 to 5 feet, subject to fire separation rules. Always verify your specific setbacks using the Ann Arbor Unified Development Code or by contacting the Planning and Development Services division.

What happens if I build without a permit in Ann Arbor?

Building without a required permit in Ann Arbor can lead to serious consequences. The city's Building and Rental Services office has authority to issue stop-work orders, require demolition or removal of unpermitted structures, and levy fines. If an unpermitted structure is discovered during a property sale, it can delay or derail the transaction, as lenders and title companies often require proof of permits and final inspections. Retroactive permits are sometimes available but typically cost more and may require opening up walls or removing finishes for inspection. Michigan state law also allows municipalities to pursue legal action for zoning and building code violations. It is always less expensive to get the permit upfront.

Do I need a permit to build an ADU in Ann Arbor?

Yes, accessory dwelling units (ADUs) in Ann Arbor require a building permit and a detailed site plan. Ann Arbor has updated its Unified Development Code in recent years to encourage ADU development as a way to increase housing supply, and ADUs are now permitted in most residential zoning districts. However, you must still comply with setback requirements, maximum ADU square footage limits (typically tied to a percentage of the primary dwelling), parking provisions, and utility connection standards. Both attached ADUs (such as a basement apartment) and detached ADUs (such as a backyard cottage) are subject to permitting. Contact Ann Arbor Building and Rental Services or review the UDC before finalizing your ADU design.

Where do I submit a site plan or permit application in Ann Arbor?

Ann Arbor accepts most residential permit applications through its online E-TrakIt portal, which allows you to upload your site plan and supporting documents, pay fees, and track your application status without visiting city offices. The portal is accessible through the city's official website at a2gov.org. For homeowners who prefer in-person assistance, the Building and Rental Services office is located at 301 E. Huron St., Ann Arbor, MI 48104. Staff can answer questions about submittal requirements and help you determine which permits apply to your project. It is advisable to call ahead at (734) 794-6263 to confirm current office hours and whether walk-in service is available.

Does Ann Arbor have special rules for projects near the Huron River or in a floodplain?

Yes, properties in or near FEMA-designated Special Flood Hazard Areas along the Huron River and its tributaries are subject to additional requirements in Ann Arbor. Projects in these zones must comply with floodplain development regulations, which may include elevating structures above the base flood elevation, using flood-resistant materials, and obtaining a floodplain development permit in addition to a standard building permit. Your site plan must reflect floodplain boundaries if they affect your lot. You can check your property's flood zone designation using the FEMA Flood Map Service Center at msc.fema.gov. Ann Arbor's Planning and Development Services staff can also help you understand how floodplain regulations affect your specific project.

Site Plan Requirements in Ann Arbor, MI (Permit Guide)

By Site Plan Creator Team • May 25, 2026

Ann Arbor, Michigan has detailed residential permitting requirements that make a properly drawn site plan essential for nearly any home improvement project. From deck additions to accessory dwelling units, understanding what the city expects can save you time and money. This guide walks you through everything you need to know about site plans and permits in Ann Arbor.

Site plan requirements for residential properties in Ann Arbor, Michigan

Navigating Residential Site Plans and Permits in Ann Arbor, MI

Ann Arbor is one of Michigan's most dynamic cities, home to the University of Michigan, a thriving arts scene, and a mix of historic neighborhoods and newer residential developments. Whether you own a craftsman bungalow in the Old Fourth Ward, a mid-century ranch near Huron Hills, or a newer home in the Burns Park area, any significant improvement to your property will likely require a building permit and a professionally prepared site plan. The city's Building and Rental Services division enforces a robust set of zoning and construction standards designed to protect neighborhood character, manage stormwater, and ensure public safety. Getting your site plan right from the start is the single most effective way to avoid costly delays.

What Is a Residential Site Plan and Why Does Ann Arbor Require One?

A residential site plan is a scaled, bird's-eye drawing of your property showing the lot boundaries, existing structures, proposed improvements, setbacks, driveways, easements, and other relevant features. Ann Arbor requires site plans as part of most building permit applications so that reviewers can verify that your project complies with the city's Unified Development Code (UDC). The UDC governs everything from how close a structure can be to a property line to how much impervious surface is allowed on a given lot. Without an accurate site plan, the Building and Rental Services office cannot confirm compliance, and your permit application will be placed on hold or returned.

The Ann Arbor Building and Rental Services office handles residential permit applications and provides guidance on submittal requirements. Michigan's statewide construction codes are administered through the Michigan Department of Licensing and Regulatory Affairs (LARA), which adopts and updates the Michigan Building Code on a regular basis.

Residential Projects That Typically Require a Permit in Ann Arbor

The following project types almost always trigger a permit requirement and a site plan submittal in Ann Arbor:

Decks and porches: Any deck more than 200 square feet, attached to the house, or elevated more than 30 inches above grade requires a permit.
Detached sheds and accessory structures: Structures over 200 square feet require a permit; smaller sheds may still need zoning approval depending on placement.
Swimming pools: Both in-ground and above-ground pools over 24 inches deep require a permit and must comply with barrier/fence requirements.
Fences: Fences over six feet in height require a permit. Fences in front yards are subject to additional height and placement restrictions.
Home additions: Any addition to the footprint of a home requires a full permit and site plan showing proposed setbacks.
Accessory Dwelling Units (ADUs): Ann Arbor has actively encouraged ADU development; both attached and detached ADUs require permits, site plans, and compliance with specific UDC provisions.
Driveways and impervious surfaces: New or expanded driveways may require a right-of-way permit and must comply with impervious surface limits.
HVAC, electrical, and plumbing work: Trade permits are required for most mechanical system work, though a full site plan may not always be needed for these alone.

Ann Arbor Zoning Quirks and Local Considerations

Ann Arbor's zoning landscape has several features that can catch homeowners off guard:

Historic Districts: Ann Arbor has multiple locally designated historic districts, including Old Fourth Ward and parts of the Old West Side. Projects in these areas require review by the Historic District Commission before a building permit can be issued. Changes to exterior materials, windows, and rooflines are all subject to scrutiny.

Tree Preservation: Ann Arbor has one of the most stringent tree preservation ordinances in Michigan. Any project that involves removing or impacting trees with a trunk diameter of five inches or more at breast height (DBH) may require a tree removal permit and a replacement plan. Your site plan should show all significant trees on the property.

Impervious Surface Limits: The city caps impervious surface coverage to manage stormwater runoff. Depending on your zoning district, you may be limited in how much of your lot can be covered by hard surfaces including driveways, patios, and rooftops. Exceeding these limits requires a variance or a stormwater management plan.

Floodplain Awareness: Portions of Ann Arbor near the Huron River and its tributaries fall within FEMA-designated Special Flood Hazard Areas. Projects in or near these zones must comply with floodplain development regulations. You can check your property's flood zone status using the FEMA Flood Map Service Center.

ADU-Friendly Policies: Ann Arbor updated its zoning code in recent years to make ADU development more accessible. The city allows ADUs in most residential zones, but setback requirements, maximum square footage, and owner-occupancy rules still apply. Consulting the UDC or speaking with a planner before designing your ADU is strongly recommended.

Typical Setback Requirements in Ann Arbor

Setbacks in Ann Arbor vary by zoning district, but the following ranges are representative of common residential zones (R1 through R4):

Front yard setback: Typically 20 to 25 feet from the front property line, though some neighborhoods have established front setback lines based on existing structures.
Side yard setback: Generally 4 to 6 feet for single-family zones; corner lots have additional requirements for the street-facing side.
Rear yard setback: Typically 25 to 30 percent of lot depth, with a minimum of 20 feet in most residential districts.
Accessory structures: Detached garages and sheds may be placed closer to rear and side lot lines, often within 3 to 5 feet, subject to fire separation requirements.

Always verify setbacks directly with the Ann Arbor Planning and Development Services division or by reviewing the UDC, as specific requirements depend on your lot's zoning classification.

The Ann Arbor Permit Submission Process

Ann Arbor has moved toward online permit submission through its E-TrakIt portal, which allows homeowners and contractors to submit applications, upload plans, pay fees, and track review status digitally. Here is a general overview of the process:

Determine your project type and applicable permits. Visit the Building and Rental Services page or call the office to confirm which permits apply to your project.
Prepare your site plan and construction documents. Your site plan must be drawn to scale, include a north arrow, show all lot dimensions, existing and proposed structures, setbacks, easements, and utilities.
Submit via E-TrakIt or in person. Most applications can be submitted online. Complex projects or those requiring Historic District Commission review may involve additional steps.
Pay the permit fee. Fees are based on project valuation and type. Residential permit fees in Ann Arbor can range from under $100 for minor work to several hundred dollars or more for larger additions.
Await plan review. Standard residential reviews typically take 10 to 15 business days. Projects requiring zoning board or historic district review will take longer.
Receive approval and schedule inspections. Once approved, you will receive your permit and can begin work. Inspections are required at key stages of construction.

Common Reasons Permit Applications Are Rejected in Ann Arbor

Understanding why applications get sent back can help you avoid the same mistakes:

Site plan is not drawn to scale or lacks a scale bar
Missing or incorrect setback dimensions
Failure to show existing structures, trees, or easements
Impervious surface calculations not included or exceed allowable limits
Project located in a historic district without HDC pre-approval
Incomplete contractor licensing information
Proposed structure encroaches on a utility easement
Floodplain documentation missing for properties near the Huron River

Get Your Ann Arbor Site Plan Right the First Time

Creating an accurate, code-compliant site plan does not have to be complicated. Site Plan Creator is designed specifically for homeowners and small contractors who need a professional-quality site plan without hiring a surveyor or draftsman for every project. Our tool walks you through each required element, helps you calculate setbacks, and produces a clean, scaled drawing ready for submission to Ann Arbor Building and Rental Services. Start your project on the right foot and avoid costly back-and-forth with the permit office.

Frequently Asked Questions

Do I need a permit to build a deck in Ann Arbor, MI?: Yes, in most cases you will need a building permit to build a deck in Ann Arbor. The city requires a permit for any deck that is attached to the house, exceeds 200 square feet in area, or is elevated more than 30 inches above grade. As part of the permit application, you will need to submit a site plan showing the deck's location on your lot, its dimensions, and the setbacks from all property lines. Decks in historic districts also require review by the Historic District Commission before a permit can be issued. Unpermitted decks can create problems when you sell your home and may result in fines or required removal.
What does Ann Arbor require on a residential site plan?: Ann Arbor's Building and Rental Services office requires that a residential site plan include several key elements: the property boundaries with dimensions, a north arrow, a graphic scale, the location and footprint of all existing structures, the location and dimensions of the proposed improvement, setback distances from all property lines, easements and rights-of-way, driveways and walkways, and significant trees (five inches DBH or larger). For projects near the Huron River, floodplain information may also be required. The plan must be drawn to scale, typically 1 inch equals 10 or 20 feet for most residential lots. Incomplete or unscaled site plans are one of the most common reasons applications are returned.
How long does it take to get a building permit approved in Ann Arbor?: For standard residential projects in Ann Arbor, plan review typically takes 10 to 15 business days from the date of a complete application submission. However, projects that require additional review can take considerably longer. If your property is in a locally designated historic district, the Historic District Commission meets on a regular schedule and you may need to wait for the next available meeting. Projects requiring a variance from the Zoning Board of Appeals add additional weeks to the timeline. Submitting a complete, accurate application with a well-prepared site plan is the best way to avoid delays. Incomplete applications are returned and restart the review clock.
How much does a building permit cost in Ann Arbor?: Permit fees in Ann Arbor are calculated based on the type of project and its estimated construction valuation. Minor permits for small structures or trade work can cost less than $100, while permits for larger additions, new detached garages, or accessory dwelling units can run several hundred to over a thousand dollars depending on project scope. There may also be separate fees for zoning review, tree removal permits, or right-of-way permits if your project affects the public sidewalk or driveway apron. The city's E-TrakIt portal provides fee estimates during the application process. For a precise fee quote, contact Ann Arbor Building and Rental Services at (734) 794-6263.
Can I draw my own site plan in Ann Arbor, or do I need a licensed surveyor?: For most standard residential permit applications in Ann Arbor, you are not required to hire a licensed surveyor or engineer to prepare your site plan. Homeowners and contractors can draw their own site plans as long as the drawing meets the city's requirements: drawn to scale, showing all required elements, and accurately reflecting lot dimensions and structure locations. However, if you do not have a recent survey of your property, you may need to obtain one to confirm lot boundaries and easements before drawing your plan. For complex projects, ADUs, or work in floodplain areas, professional preparation is strongly recommended. Tools like Site Plan Creator can help non-professionals produce compliant drawings.
What are the setback requirements for residential properties in Ann Arbor?: Setback requirements in Ann Arbor vary by zoning district. In common single-family residential zones (R1 through R4), front yard setbacks are typically 20 to 25 feet from the front property line. Side yard setbacks generally range from 4 to 6 feet, with larger setbacks required on corner lots for the street-facing side. Rear yard setbacks are often 25 to 30 percent of lot depth, with a minimum of 20 feet in most districts. Accessory structures like detached garages and sheds may be placed closer to rear and side lot lines, sometimes within 3 to 5 feet, subject to fire separation rules. Always verify your specific setbacks using the Ann Arbor Unified Development Code or by contacting the Planning and Development Services division.
What happens if I build without a permit in Ann Arbor?: Building without a required permit in Ann Arbor can lead to serious consequences. The city's Building and Rental Services office has authority to issue stop-work orders, require demolition or removal of unpermitted structures, and levy fines. If an unpermitted structure is discovered during a property sale, it can delay or derail the transaction, as lenders and title companies often require proof of permits and final inspections. Retroactive permits are sometimes available but typically cost more and may require opening up walls or removing finishes for inspection. Michigan state law also allows municipalities to pursue legal action for zoning and building code violations. It is always less expensive to get the permit upfront.
Do I need a permit to build an ADU in Ann Arbor?: Yes, accessory dwelling units (ADUs) in Ann Arbor require a building permit and a detailed site plan. Ann Arbor has updated its Unified Development Code in recent years to encourage ADU development as a way to increase housing supply, and ADUs are now permitted in most residential zoning districts. However, you must still comply with setback requirements, maximum ADU square footage limits (typically tied to a percentage of the primary dwelling), parking provisions, and utility connection standards. Both attached ADUs (such as a basement apartment) and detached ADUs (such as a backyard cottage) are subject to permitting. Contact Ann Arbor Building and Rental Services or review the UDC before finalizing your ADU design.
Where do I submit a site plan or permit application in Ann Arbor?: Ann Arbor accepts most residential permit applications through its online E-TrakIt portal, which allows you to upload your site plan and supporting documents, pay fees, and track your application status without visiting city offices. The portal is accessible through the city's official website at a2gov.org. For homeowners who prefer in-person assistance, the Building and Rental Services office is located at 301 E. Huron St., Ann Arbor, MI 48104. Staff can answer questions about submittal requirements and help you determine which permits apply to your project. It is advisable to call ahead at (734) 794-6263 to confirm current office hours and whether walk-in service is available.
Does Ann Arbor have special rules for projects near the Huron River or in a floodplain?: Yes, properties in or near FEMA-designated Special Flood Hazard Areas along the Huron River and its tributaries are subject to additional requirements in Ann Arbor. Projects in these zones must comply with floodplain development regulations, which may include elevating structures above the base flood elevation, using flood-resistant materials, and obtaining a floodplain development permit in addition to a standard building permit. Your site plan must reflect floodplain boundaries if they affect your lot. You can check your property's flood zone designation using the FEMA Flood Map Service Center at msc.fema.gov. Ann Arbor's Planning and Development Services staff can also help you understand how floodplain regulations affect your specific project.

How to Create a Site Plan in Ann Arbor

Confirm Your Permit Requirements: Before drawing anything, contact Ann Arbor Building and Rental Services or visit the city's website to confirm which permits apply to your project. Describe your project in detail, including the structure type, size, location on the lot, and whether your property is in a historic district or floodplain. This step prevents you from preparing plans for the wrong permit type and saves significant time later in the process.
Gather Your Property Documents: Collect your property survey, deed, and any existing building plans. Your survey will provide accurate lot dimensions, easement locations, and boundary information that must be reflected on your site plan. If you do not have a recent survey, you may need to order one from a licensed Michigan surveyor. Ann Arbor's permit reviewers will flag site plans with inaccurate or missing boundary information.
Draw Your Site Plan to Scale: Using your survey and property documents, create a scaled site plan that shows lot boundaries, all existing structures, the proposed improvement, setback dimensions from all property lines, driveways, easements, and significant trees. The plan must include a north arrow and a graphic scale bar. Site Plan Creator can guide you through each required element and produce a clean, professional drawing ready for Ann Arbor's review process.
Submit Your Application via E-TrakIt: Create an account on Ann Arbor's E-TrakIt online portal and submit your permit application with your completed site plan and any required supporting documents such as construction drawings, energy compliance forms, or contractor license information. Pay the applicable permit fee at the time of submission. The portal allows you to track your application status and respond to reviewer comments electronically.
Respond to Plan Review Comments: Ann Arbor's plan reviewers may return your application with comments or correction requests if your site plan or construction documents are incomplete or non-compliant. Address each comment carefully and resubmit through E-TrakIt. Common corrections include adding missing setback dimensions, correcting scale errors, or providing additional tree or floodplain information. Prompt, thorough responses minimize delays.
Schedule Inspections and Close Your Permit: Once your permit is approved, post it visibly at the job site and begin construction. Schedule required inspections through the E-TrakIt portal or by calling Building and Rental Services. Inspections are typically required at foundation, framing, and final stages. After passing your final inspection, the permit is closed and your project is officially approved, protecting you legally and adding documented value to your property.