Do I Need a Permit to Build a Deck in Detroit, MI?

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Fees

Estimated city fees

Baseline for a simple permitted deck: $210–$520 estimated combined fees (permit + plan review) for a typical residential deck in Detroit

Fee	Amount	Notes
Building permit fee	$150–$400 (estimated)	Detroit BSEED building permit fees for residential construction are based on project valuation. A typical residential deck generates an estimated $150–$400 in permit fees. Verify current amounts through the BSEED ePLANS portal at detroitmi.gov/bseed.
Plan review fee	$60–$120 (estimated)	A plan review fee is assessed for review of submitted construction drawings. Combined permit and plan review for a typical residential deck typically runs $210–$520.
Michigan state building surcharge	$5–$15	Michigan assesses a state construction code fee on permitted projects, collected by BSEED at permit issuance under the Michigan Construction Code Act (Act 230 of 1972).

Documents

Required documents

Permit application filed through the Detroit BSEED ePLANS online system at detroitmi.gov/bseed. All new residential permit applications are submitted through ePLANS.
Site plan drawn to scale showing property lines, existing structures, proposed deck footprint, and distances to all property lines — required to confirm compliance with Detroit zoning ordinance setback and yard requirements.
Construction drawings including floor plan, elevations, and cross-sections showing deck dimensions, height above grade, guardrail height and design (36 inches minimum for decks under 30 inches; 42 inches for decks 30 inches or more above grade per MRC), stair configuration, and material specifications.
Structural details for footings (minimum 42-inch depth below grade for the Detroit frost line), posts, beams, joists, ledger attachment if the deck is attached to the house, and all connection hardware, complying with the Michigan Residential Code.
Michigan-licensed contractor information: all persons performing construction work in Detroit under a permit must hold an applicable Michigan construction license (residential builder or maintenance/alteration contractor) issued by LARA. Homeowners may qualify to self-permit under the owner-occupant exemption.
Workers' compensation and general liability insurance certificate for the contractor performing the work.

Timeline

Typical timing

Plan review: 10–15 business days for standard residential plan review
Total cycle: 5–8 weeks from application to final inspection

Zoning variance proceedings (if required) can add 2–3 months before a permit application is accepted. Projects requiring plan review correction rounds add additional review cycles. BSEED processes permits through the ePLANS digital system; technical issues with document uploads can add minor delays.

Process

How the permit process works

Verify Detroit zoning requirements Use Detroit's online zoning map at detroitmi.gov to identify your property's zoning district and look up the applicable side yard, rear yard, and front yard setbacks, plus lot coverage maximums. Decks placed too close to property lines require a variance from the Detroit Board of Zoning Appeals (BZA) — a BZA hearing can add 2–3 months to the timeline. Confirm zoning compliance before preparing full construction documents.
Verify Michigan contractor licensing If hiring a contractor, verify they hold a Michigan Residential Builder License or Maintenance and Alteration Contractor License issued by the Michigan Department of Licensing and Regulatory Affairs (LARA). The contractor's Michigan license number must be provided on the BSEED ePLANS application. Unlicensed residential construction work violates Michigan law. Check license status at michigan.gov/lara.
Prepare Michigan Residential Code-compliant drawings Prepare construction drawings complying with the Michigan Residential Code (based on the IRC with MI amendments). Key requirements include: footings below the 42-inch Detroit frost line, guardrails at 42 inches minimum height for decks 30 inches or more above grade, stair guardrails at 34–38 inches, and ledger connections meeting MRC structural requirements if the deck is attached. Include a site plan, framing plan, footing details, and connection hardware specifications.
Submit through BSEED ePLANS Create an account and submit the permit application and all supporting documents through the Detroit BSEED ePLANS system at detroitmi.gov/bseed. Upload the site plan, construction drawings, structural details, and contractor license and insurance information. All new residential building permits for Detroit must be submitted through ePLANS.
Undergo plan review BSEED plan reviewers check submissions for compliance with the Michigan Residential Code (structural and life safety) and Detroit Zoning Ordinance (setbacks, lot coverage). Standard residential plan review takes 10–15 business days. Track review status through the ePLANS portal.
Pay fees and receive the permit Once plan review is approved, pay the permit fee, plan review fee, and Michigan state surcharge through the ePLANS system or at the BSEED office. Post the issued permit card on-site in a visible location before beginning construction. Keep approved drawings on-site throughout construction for inspector reference.
Schedule BSEED inspections Request required inspections through the BSEED ePLANS portal or by calling BSEED at (313) 224-2733. Required inspections for a residential deck typically include: footing (before concrete pour, to verify 42-inch frost-line depth), framing (after structural members are set), and final inspection. The permit is closed after the final inspection confirms Michigan Residential Code compliance.

Code basis

What Detroit reviews against

Michigan Residential Code (MRC), based on the International Residential Code (IRC) with Michigan amendments, as enforced by the City of Detroit Buildings, Safety Engineering and Environmental Department (BSEED) under the Michigan Construction Code Act (Act 230 of 1972).

Residential permit page Detroit permit portal

If you skip the permit

What can go wrong

Detroit BSEED can issue a stop-work order requiring all construction to cease immediately and post a notice of violation on the property.
BSEED can require correction or removal of unpermitted work at the owner's expense; decks that cannot be brought into code compliance retroactively may be ordered demolished.
Michigan law requires sellers to disclose known building code violations and unpermitted construction in residential real estate transactions (Michigan Seller Disclosure Act, MCL 565.957); an unpermitted deck can affect sale price or require correction prior to closing.
Unpermitted construction subjects the property owner to civil fines enforceable by Detroit that accumulate until the violation is resolved.
Homeowner's insurance may deny claims involving damage or injury related to an unpermitted structure, leaving the homeowner fully liable.

FAQ

Common Detroit deck permit questions

Do I need a permit to build a deck in Detroit?

Yes. Any deck attached to the house requires a building permit from Detroit BSEED under the Michigan Residential Code. Freestanding decks more than 30 inches above grade also require a permit. All permit applications must be submitted electronically through the BSEED ePLANS system at detroitmi.gov/bseed.

What is the frost line depth for deck footings in Detroit?

Detroit's frost line depth is 42 inches. All deck footings must extend at least 42 inches below finished grade to prevent frost heave. This is enforced during the mandatory footing inspection — inspectors verify depth before you pour concrete. Footings that don't reach frost line depth will fail inspection and require correction.

How much does a deck permit cost in Detroit?

Estimated combined fees (building permit + plan review) for a typical residential deck in Detroit run approximately $210–$520, plus a small Michigan state surcharge. Fees are based on project valuation. Verify current amounts through the BSEED ePLANS portal at detroitmi.gov/bseed.

Does Michigan require a licensed contractor for deck construction?

Yes, for hired contractors. Michigan requires that contractors performing residential construction hold a Michigan Residential Builder License or Maintenance and Alteration Contractor License issued by LARA. The contractor's license number must be provided on the BSEED ePLANS permit application. Homeowners may self-permit under the owner-occupant exemption for their own residence but must personally supervise the work.

What makes Detroit's deck permit process unique?

Detroit requires all permit applications to be submitted electronically through the BSEED ePLANS system — paper applications are not accepted for new residential permits. Detroit's 42-inch frost line (one of the deepest in major US cities) is also a critical structural requirement that affects footing design and material costs compared to warmer-climate cities.

What happens if I build a deck without a permit in Detroit?

Detroit BSEED can issue a stop-work order and require correction or removal of the unpermitted deck at your expense. Civil fines accumulate until the violation is cleared. Michigan's Seller Disclosure Act requires disclosure of unpermitted work in real estate transactions, which can delay or kill a property sale. Insurance claims for damage or injury related to an unpermitted deck may be denied.

Sources

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