How roof replacement permits work in Ann Arbor
Ann Arbor requires a building permit for any roof replacement or re-roofing. Even a straight shingle-over-shingle job triggers a permit because the inspector must verify ice barrier installation, ventilation, and deck condition. The permit itself is typically called the Residential Building Permit — Roofing.
This is primarily a building permit. You'll be working with one permit, one set of inspections, and one fee schedule.
Why roof replacement permits look the way they do in Ann Arbor
Ann Arbor's Climate Action Plan has driven local energy benchmarking requirements and a push toward electrification that can affect mechanical permit scope reviews. The city's high rental-housing density near U of M campus means Certificate of Occupancy inspections are frequently required on ownership transfers. Old West Side and Germantown historic districts add Architectural Review layers not present in surrounding Washtenaw County townships. Clay soils in the Huron River watershed often require engineered drainage plans for additions with significant impervious coverage.
For roof replacement work specifically, wind, snow, and seismic loads on the roof structure depend on local conditions: the city sits in IECC climate zone CZ5A, frost depth is 42 inches, design temperatures range from 5°F (heating) to 89°F (cooling).
Natural hazard overlays in this jurisdiction include FEMA flood zones, radon, and expansive soil. If your address falls within any of these overlay zones, the roof replacement permit application picks up an extra review step that can add days to the timeline and specific design requirements to the plans.
HOA prevalence in Ann Arbor is medium. For roof replacement projects this matters because HOA architectural review committee approval is a separate process from the city building permit, and the two have completely different rules. The HOA reviews materials, colors, and aesthetics; the city reviews structural, electrical, and code compliance. You generally need both, and the HOA approval typically takes 2-4 weeks regardless of how fast the city is.
Ann Arbor has multiple locally designated historic districts, including Old West Side, Germantown, and Broadway Historic Districts, plus properties on the State and National Registers. Work within these districts requires Certificate of Appropriateness from the Historic District Commission before building permits are issued.
What a roof replacement permit costs in Ann Arbor
Permit fees for roof replacement work in Ann Arbor typically run $100 to $400. Valuation-based; typically a percentage of project value plus a base fee and a state construction code surcharge
Michigan levies a mandatory state construction code surcharge (currently $6 per $1,000 of valuation) on top of city fees; a separate plan review fee may apply for complex or historic-district projects.
The fee schedule isn't usually what makes roof replacement permits expensive in Ann Arbor. The real cost variables are situational. Full tear-off required when existing roof has two shingle layers (common in Ann Arbor's older housing stock), adding $1,500-$3,000 in labor and disposal. Ice & water shield coverage requirement for CZ5A eaves and valleys adds material cost vs warmer-climate jobs — a 2,000 sf roof may need 8-12 squares of peel-and-stick. Historic District Commission review for Old West Side, Germantown, or Broadway properties may require premium approved products (cedar-profile shingles, specific colors) at 20-40% cost premium over standard architectural shingles. Clay-heavy soils and age of housing stock mean attic ventilation upgrades (adding ridge vent, clearing soffit blockages) are frequently needed to pass inspection, adding $500-$1,500.
How long roof replacement permit review takes in Ann Arbor
1-3 business days for standard residential; 4-8 weeks additional if Historic District Commission Certificate of Appropriateness is required first. There is no formal express path for roof replacement projects in Ann Arbor — every application gets full plan review.
What lengthens roof replacement reviews most often in Ann Arbor isn't department slowness — it's resubmissions. Each correction round generally puts the application back in the queue, so first-pass completeness matters more than first-pass speed.
Three real roof replacement scenarios in Ann Arbor
What the rules look like in practice depends a lot on the specific situation. These three scenarios cover the common shapes of roof replacement projects in Ann Arbor and what the permit path looks like for each.
Utility coordination in Ann Arbor
Roof replacement typically requires no utility coordination unless a DTE Energy electric service entrance cable runs across the roof surface — in that case, contact DTE Energy at 1-800-477-4747 to arrange a temporary service drop before work begins.
Rebates and incentives for roof replacement work in Ann Arbor
Some roof replacement projects qualify for utility rebates, state energy program incentives, or federal tax credits. The most relevant programs in this jurisdiction are listed below — eligibility depends on equipment efficiency ratings, contractor certification, and post-installation documentation, so verify specifics before purchasing.
DTE Energy Home Energy Efficiency Rebate (attic insulation, added during re-roof) — $100-$300+. Adding attic insulation to R-49+ during re-roof can qualify; roofing material itself is not rebate-eligible. dteenergyrebates.com
Michigan Saves Green Home Financing — 0% or low-interest loan. Financing for energy-related home improvements including insulation added during re-roofing projects. michigansaves.org
The best time of year to file a roof replacement permit in Ann Arbor
Ann Arbor's CZ5A winters make November through March the riskiest window for roofing — asphalt shingles require temperatures above 40°F for proper sealing, and ice & water shield adhesion can be compromised below freezing. Spring (April-May) and fall (August-October) are the highest-demand contractor seasons, so booking 4-6 weeks ahead is advisable.
Documents you submit with the application
A complete roof replacement permit submission in Ann Arbor requires the items listed below. Counter staff perform a completeness check at intake; missing anything means the package is not accepted and the timeline does not start.
- Completed permit application with property address, contractor info, and scope of work
- Project valuation / contract amount
- Manufacturer product data sheets (shingle type, underlayment, ice & water shield) for code compliance verification
- Certificate of Appropriateness from Ann Arbor Historic District Commission (for properties within Old West Side, Germantown, or Broadway Historic Districts only)
Who is allowed to pull the permit
Homeowner on owner-occupied single-family primary residence, or licensed/locally registered roofing contractor
Michigan requires no statewide general contractor license for roofing, but all contractors must register with the City of Ann Arbor Building Safety Services and carry required insurance and workers' comp. Subcontracted electrical (e.g., for solar raceways) requires a Michigan-licensed electrician.
What inspectors actually check on a roof replacement job
For roof replacement work in Ann Arbor, expect 3 distinct inspection stages. The table below shows what each inspector evaluates. Failed inspections add typically 5-10 days to the total project timeline plus the re-inspection fee.
| Inspection stage | What the inspector checks |
|---|---|
| Deck/Underlayment Rough-In (pre-cover) | Condition of roof decking (rotted or delaminated sheathing must be replaced), proper ice & water shield extending 24" inside wall line at eaves and valleys, drip edge at eaves under underlayment, felt/synthetic underlayment lap and fastening |
| Flashing Inspection (if required) | Step flashing at all wall-to-roof junctions, counterflashing at chimneys, pipe boot replacements, valley flashing method (open vs closed) meeting manufacturer specs |
| Final Inspection | Shingle fastening pattern (4 nails minimum per shingle per manufacturer/IRC), ridge cap installation, ridge vent continuity with soffit intake vents unobstructed, drip edge at rakes over underlayment, overall workmanship and scope matches permit |
A failed inspection in Ann Arbor is documented on a correction notice that lists each item that needs to be fixed. The work cannot continue past that stage until the re-inspection passes, and on roof replacement jobs that often means leaving framing or rough-in work exposed for days while you wait.
The most common reasons applications get rejected here
The Ann Arbor permit office sees the same patterns over and over. These specific issues account for most first-pass rejections, and most of them are entirely preventable with a few minutes of double-checking before submission.
- Ice & water shield not extending full 24" inside the heated wall line at eaves — the single most common failure in Ann Arbor's cold climate
- Drip edge missing at rakes, or installed in wrong sequence (rake drip edge must go over underlayment, eave drip edge under)
- Third layer of shingles installed over two existing layers without tear-off, violating IRC R908.3
- Ridge vent installed but soffit vents blocked by added insulation in attic, creating a non-functioning ventilation system
- Rotted or delaminated deck sheathing left in place rather than replaced, caught at deck inspection before shingles
Mistakes homeowners commonly make on roof replacement permits in Ann Arbor
Each of these is a real, recurring mistake on roof replacement projects in Ann Arbor. They share a common root: applying generic permit advice or out-of-state experience to a city with its own specific rules.
- Hiring a contractor who skips the permit, leaving the homeowner exposed to code violations discovered at future sale or refinancing appraisal
- Assuming a historic-district property can proceed on a standard timeline — HDC review is required before the building permit and typically takes 4-8 weeks if a full commission hearing is needed
- Accepting a bid that includes a shingle-over instead of tear-off without verifying the existing layer count — Ann Arbor's older homes frequently already have two layers, making a third layer illegal
- Overlooking attic insulation opportunity: re-roofing is the most cost-effective moment to add insulation to reach IECC CZ5A minimums, but many homeowners only budget for the roofing itself
The specific codes that govern this work
If the inspector cites a code section, this is the list they'll most likely be referencing. These are the live code references that Ann Arbor permits and inspections are evaluated against.
IRC R905.2.7 — Ice barrier required in regions with avg daily January temp ≤25°F (Ann Arbor qualifies); shield must extend 24" inside interior wall lineIRC R905.2.8.5 — Drip edge required at eaves and rakes, installed under and over underlayment respectivelyIRC R908.3 — Maximum two roof layers; third layer requires full tear-offIRC R806 — Attic ventilation (1:150 ratio without baffles, 1:300 with balanced ridge/soffit); must be maintained or restored during re-roofIECC 2015 R402.2.1 — Ceiling/roof R-38 minimum for CZ5A; re-roofing is not a mandatory upgrade trigger but is best opportunity to add insulation
Ann Arbor adopts Michigan's amendments to the 2015 IRC. Michigan requires ice barrier on all structures statewide. Historic district properties are subject to Ann Arbor's Historic District Commission ordinance (Chapter 103 of City Code), which can restrict visible roofing material color, profile, and type to match historic character.
Common questions about roof replacement permits in Ann Arbor
Do I need a building permit for roof replacement in Ann Arbor?
Yes. Ann Arbor requires a building permit for any roof replacement or re-roofing. Even a straight shingle-over-shingle job triggers a permit because the inspector must verify ice barrier installation, ventilation, and deck condition.
How much does a roof replacement permit cost in Ann Arbor?
Permit fees in Ann Arbor for roof replacement work typically run $100 to $400. The exact fee depends on the project valuation and which trade subcodes apply. Plan review and re-inspection fees are sometimes assessed separately.
How long does Ann Arbor take to review a roof replacement permit?
1-3 business days for standard residential; 4-8 weeks additional if Historic District Commission Certificate of Appropriateness is required first.
Can a homeowner pull the permit themselves in Ann Arbor?
Yes — homeowners can pull their own permits. Michigan allows owner-occupants of single-family homes to pull their own permits for work on their primary residence; homeowner must perform the work themselves and may not hire unlicensed trades under a homeowner permit.
Ann Arbor permit office
City of Ann Arbor Building Safety Services
Phone: (734) 794-6000 · Online: https://www.a2gov.org/departments/building/Pages/Permits.aspx
Related guides for Ann Arbor and nearby
For more research on permits in this region, the following guides cover related projects in Ann Arbor or the same project in other Michigan cities.