Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Yes. Birmingham requires a building permit for any deck attached to your house, regardless of size or height. The city enforces this strictly and requires plan review before construction.
Birmingham's Building Department does not exempt attached decks under any size or height threshold — that's the city-specific rule that sets it apart from some neighboring jurisdictions (Bloomfield Township, for instance, exempts ground-level decks under 200 square feet). All attached decks in Birmingham require a full permit application, structural plans, and three inspections: footing pre-pour, framing, and final. The city sits in the 42-inch frost-depth zone, so your footings must go 4.5 feet minimum below finished grade. Plan review typically takes 2–3 weeks. The online permit portal is the primary filing method, though you can also submit by mail or in person at City Hall. This is enforced — unpermitted decks trigger stop-work orders and can block sale/refinance through the Title Commitment Disclosure Statement.

What happens if you skip the permit (and you needed one)

Birmingham attached deck permits — the key details

Guardrail and stair requirements are straightforward but commonly missed. IRC R312.4 requires a guardrail of 36 inches minimum height measured from the deck surface (some jurisdictions, including some nearby Oakland County communities, require 42 inches; Birmingham adheres to the 36-inch standard, but verify on your approval letter). Guardrails must resist a 200-pound horizontal load at the rail. Balusters (vertical spindles) must be spaced so a 4-inch sphere cannot pass between them — this rules out many 'modern' metal designs if they don't meet the gap spec. Stairs are covered under IRC R311.7: each tread depth must be 10 inches minimum (measured from nosing to nosing), and risers must be 7 to 7.75 inches. Landing dimensions are often missed: if your deck is more than 30 inches above grade, stairs must land on a platform at least 36 inches wide and 36 inches deep. A single-step drop to a sidewalk is not a code-compliant landing. Plans must show stair geometry (tread depth, riser height, total rise, number of steps, landing platform dimensions). Many homeowners hand-sketch this on the back of a napkin; the city requires it on the permit plan form or a separate detail sheet.

Lateral load connections and beam-to-post attachment are now emphasized in newer IRC editions and checked on most Birmingham submittals. IRC R507.9.2 requires a positive lateral load connection (typically a DTT lateral-load device or Simpson Strong-Tie post base) where the deck beam or rim joist connects to the supporting posts. This prevents the deck from sliding or separating from the posts in high wind or if someone pulls hard on the guardrail. The requirement is not negotiable; if your plans show 'bolted to posts with 1/2-inch lag bolts only,' the reviewer will ask for a note specifying a named lateral-load device (part number, e.g., 'Simpson DTT4-SDS per manufacturer specs'). This is not an extra cost — a DTT4 costs $15–$30 — but it must be called out and installed. Some builders skip it on ground-level decks, assuming it doesn't matter; Birmingham does not exempt low decks from this rule. Similarly, where the ledger attaches to the rim joist, many plans show nails only; IRC R507.8 requires 1/2-inch bolts at 16 inches on center. This detail is critical and will be checked.

The online permit portal (available through the City of Birmingham website) is the preferred filing method and significantly speeds up the process. You can upload your plans, photos, and a sketch of the ledger flashing detail, and receive a response (approval or list of deficiencies) within 5–7 business days. In-person or mail submission typically adds 3–5 days to the initial review cycle. Once approved, you'll receive a permit number and an inspection scheduling card. Inspections are booked by you (or your contractor) via phone or the portal: footing pre-pour (must be done before you pour concrete), framing (after the deck is fully framed but before decking boards are laid), and final (everything done, including stain/sealing if required). Each inspection takes 20–30 minutes. If the inspector finds a deficiency (e.g., flashing not sealed, balusters too wide, bolts missing), you get a yellow card requesting correction, and re-inspection is scheduled at no additional fee. Rarely, if work is egregious, the inspector posts a stop-work notice; don't let that happen.

Three Birmingham deck (attached to house) scenarios

Scenario A
12x16 pressure-treated deck, 36 inches above grade, rear yard, Old Woodward Avenue bungalow
You're planning a simple composite-decking platform off the back of your 1950s brick bungalow on Old Woodward Avenue. The deck will be 12 feet by 16 feet (192 sq ft), with the finished surface 36 inches above the existing grade (because your basement is a bit sunken). You'll install a ledger board bolted to the rim joist, run two pressure-treated beams supported by four 4x4 posts set in holes at 42 inches deep (Birmingham's frost depth), and cap it with composite boards and a 36-inch tall aluminum balustrade with 4-inch balusters. No stairs; the deck has a single step down to a landing pad. Here's the permit path: You file online through the City of Birmingham permit portal with a sketch showing the ledger detail (bolts, flashing, sealant), a footing cross-section (12x12 hole, 42 inches deep), beam span and post spacing, railing design, and a photo of your rim joist. Estimated permit fee is $250–$350 (1.5–2% of an estimated $15,000–$18,000 project valuation). Plan review takes 10–15 business days; the reviewer will likely ask for clarification on the ledger flashing (especially whether you've shown the metal flashing bent down and sealed). Once approved, you schedule the footing pre-pour inspection (inspector verifies hole depth with a tape). After footing concrete cures (3–7 days), you frame; the framing inspection checks ledger attachment (bolts present, spacing 16 inches o.c.), beam-to-post connections (lateral-load device installed, bolts tight), and balustrade mounting (no flex, balusters 4 inches or less apart). Final inspection is decking installed, all fasteners, stain/sealer if using one. Total timeline: 2–3 weeks for permit approval plus 1–2 weeks for construction and inspections. No special conditions; the composites and aluminum are both standard materials in Birmingham and don't trigger any additional review.
Permit required | Ledger flashing detail must be shown | 42-inch footing depth required | Lateral-load device on posts required | Permit fee $250–$350 | Three inspections (footing pre-pour, framing, final) | Estimated total project cost $15,000–$18,000
Scenario B
16x20 pressure-treated deck with stairs, 48 inches above grade, sloped lot in north Birmingham near Quarton Lake
Your north Birmingham lot slopes down toward Quarton Lake, and you want a larger deck (16x20, 320 sq ft) elevated 4 feet above grade to gain views and accommodate a sloped yard. Because the deck is elevated, you'll need a proper landing platform and stairs (3–4 steps down to a patio below). The higher elevation and larger footprint trigger more intensive plan review. You submit plans showing: (1) a cross-section of the slope and footing locations (some posts will be in fill; some in native glacial till — the reviewers will want to see compaction notes or a soil report if the fill is more than a few feet); (2) ledger detail with flashing and bolts; (3) stair design with landing platform dimensions (36x36 minimum), tread depths (10 inches), riser heights (7–7.75 inches each, targeting 6–7 steps), and guardrail height (36 inches); (4) beam sizing (depending on span and load, likely a 2x10 or doubled 2x8); (5) a site plan showing the deck location, setback from property lines, and any HOA restrictions. Permit fee is $350–$500 (based on a $20,000–$25,000 estimated valuation). Plan review now takes 3–4 weeks because the reviewer will scrutinize footing conditions on a slope, stair geometry to ensure code compliance, and beam spans. If your soil report is missing (or if you're not providing one), the reviewer may issue a conditional approval pending a soils engineer's sign-off — this can add 1–2 weeks. Once approved, inspections are: footing pre-pour (inspector verifies depth and notes any fill conditions), framing (ledger, beams, posts, stair stringers, landing framing all present and bolted to spec), final (decking, stairs cladded and finished, railings installed, balusters spaced correctly). North Birmingham's sandy soil (north of Maple Road) is often less compact than the glacial till to the south, so the inspector may ask you to document footing preparation (tamping, gravel base, etc.). Timeline: 4–5 weeks permit plus 2–3 weeks construction. The deck itself is standard code; the slope and fill conditions are the complexity driver.
Permit required | Slope and fill footing conditions may require soils engineer review | Ledger flashing and bolts required | Stair landing platform (36x36 minimum) required | Guardrail 36 inches minimum height | Permit fee $350–$500 | Soils report may be required ($500–$1,500) | Four inspections possible if soils review required | Estimated total project cost $20,000–$28,000
Scenario C
10x14 ground-level composite deck, 18 inches above grade, freestanding posts (no ledger), Cranbrook Village Historic District
You're considering a smaller 'deck' (really a patio platform) at your Cranbrook Village mid-century home. It's 10x14 feet, set on four freestanding posts only 18 inches above grade (you're not attaching a ledger — you want to avoid disturbing the original brick). Because it's ground-level and freestanding, you might think it's exempt. It's not in Birmingham. First, even though it's under 30 inches and under 200 sq ft by footprint, the city requires a permit for any attached deck — and this one, while not ledger-attached, is still considered a 'deck accessory' to the house and requires permitting per the city's interpretation. Second, if you're in the Cranbrook Village Historic District (check your property card online via Oakland County), there may be an additional Historic District Commission (HDC) review overlay: the city will route your deck plans to the HDC if the deck is visible from the street or affects the building's historic character. This can add 2–4 weeks to the approval timeline because the HDC meets once or twice a month and reviews designs for compatibility with the district's architectural standards. The permit fee is still $200–$300, but you may incur an additional $0–$200 HDC review fee (some minor projects are waived). Your plans must show: (1) footing locations (four posts, 12x12 holes, 42 inches deep); (2) post-to-concrete connection (post base hardware, e.g., Simpson CBSQ adjustable post base); (3) decking material (composite or treated lumber); (4) no railings needed if height is truly 18 inches (IRC R312.1 exempts decks under 30 inches from guardrail requirement, though railings are optional). The HDC may request design review of materials and finish color to ensure the deck 'reads' as compatible with the house (e.g., if your house is mid-century modern, the HDC may prefer clean lines and natural or earth-tone colors, not ornate Victorian balusters). Plan review (city only) is 2–3 weeks; if HDC review is required, add 3–4 weeks. Total timeline: 5–7 weeks approval plus 1–2 weeks construction. Inspections are footing pre-pour and final. This scenario shows how historic-district overlay adds complexity — a neighboring house in the same project but outside the district would be approved 3–4 weeks faster.
Permit required (no exemption for small freestanding decks) | Historic District Commission overlay review may apply | Footing depth 42 inches required | Post-base hardware required (Simpson CBSQ or equivalent) | Permit fee $200–$300 + possible HDC fee $0–$200 | Historic District review adds 3–4 weeks if applicable | Two inspections (footing pre-pour, final) | Estimated total project cost $8,000–$12,000

Every project is different.

Get your exact answer →
Takes 60 seconds · Personalized to your address

Ledger flashing and water intrusion — why Birmingham reviewers scrutinize this detail

Ledger-board rot is the most expensive deck failure in Michigan. When water gets behind the ledger and into the rim joist (the band of wood at the edge of your basement), it soaks the wood for months. Rim joists are typically not treated lumber in older homes, and even pressure-treated rim boards can fail if water is trapped. By the time you notice soft spots or mold, the damage is $3,000–$8,000 to excavate, remove the ledger, replace the rim joist, and reinstall the ledger. Birmingham's Building Department plan reviewers (who have seen this failure pattern locally) now insist on a detailed flashing callout on every deck plan. IRC R507.9 is the standard, but Birmingham goes a step further: the city's inspectors will often request a pre-construction photo showing the existing rim joist condition and the flashing material before you cover it with the ledger board.

The correct installation is: (1) Install 26-gauge or heavier galvanized-steel flashing behind the ledger board (above the rim joist), running horizontally the full width of the ledger. (2) Bend the flashing down and out over the rim joist's top edge, extending down the outer face of the rim by at least 4 inches. (3) At the bottom edge of the flashing (where it bends away from the rim), seal it with polyurethane caulk or 100% silicone to prevent water from wicking back up. (4) Bolt the ledger to the rim joist with 1/2-inch stainless or hot-dip galvanized bolts at 16 inches on center, and washers on both sides of the bolt. No nails; no hangers; bolts only. This detail is non-negotiable and will be checked during framing inspection. If you deviate (e.g., using aluminum flashing, which corrodes, or skipping the caulk at the bottom), the inspector will post a yellow card and you'll have to correct it before final inspection.

Many homeowners and contractors are surprised by the strictness here, but it's grounded in local experience. Birmingham's older housing stock (a lot of 1920s–1960s homes) has rim joists that are vulnerable. The city's plan review has tightened over the past 10 years specifically because contractors cut corners on flashing, and the city has had to issue compliance orders on rot failures. If you're hiring a contractor, explicitly reference 'IRC R507.9 flashing installed behind ledger, 26-gauge steel, sealed at bottom with caulk' in your scope. Get a photo of the flashing installed before the ledger board covers it.

Frost depth, footing depth, and why 42 inches matters in Birmingham

Birmingham sits in USDA hardiness zone 5A south and 6A north, with a frost line (the depth at which groundwater freezes in winter) of 42 inches below finished grade. This is a hard rule set by the Michigan Building Code and based on decades of weather data. If you install a deck footing at only 36 inches deep, the bottom of the footing sits above the frost line, and when the ground freezes, it expands. This expansion (frost heave) can lift a post 2–4 inches over the winter, settling it back down when the ground thaws in spring. After a few winter cycles, the deck has moved relative to the house ledger — the rim joist separates from the ledger, water intrudes, and you're back to rot. The 42-inch rule is not a suggestion; it's enforced on every footing inspection in Birmingham.

Digging a 42-inch hole in December is miserable in Michigan; many homeowners ask 'Can we do this in the fall before the frost depth gets worse?' The answer is no — the 42 inches is measured to the finished grade in winter (or at the point where frozen ground is likely). Frost depth is not something that deepens over the winter; it's the estimated depth at which the ground will freeze, typically reached by mid-January. Most contractors in Birmingham dig footings in the fall and pour concrete before the first frost, which is fine — just make sure the holes go 42 inches down. If you're building in late winter or early spring, the ground is already frozen on top, so you may need to excavate through a few inches of frost before you reach unfrozen soil. This is not a code violation; it's just reality in Michigan.

Soil conditions in Birmingham vary: glacial till (dense, compact clay-sand mix) dominates the southern part of town; sandier, more friable soil is common north of Maple Road. For most deck footings, post-hole size is 12x12 inches minimum, and depth is 42 inches minimum regardless of soil type. In sandy soil, post holes may need to be slightly wider (14x14) to prevent lateral slumping during the pour, but this is contractor judgment, not a code requirement. If your lot has fill (if the grade was raised, e.g., from a past renovation), you may need a soils engineer's report to confirm that the fill is compacted and won't settle. The Building Department will ask for this if the depth of fill is more than 2–3 feet. This is rare on a residential lot, but it's worth checking the lot history if your house was built on a slope or a filled area.

City of Birmingham Building Department
151 Martin Street, Birmingham, MI 48009
Phone: (248) 530-1800 (main switchboard; ask for Building Department) | https://www.bhammi.org/Departments/Building
Monday–Friday, 8:00 AM–5:00 PM (closed municipal holidays)

Common questions

Can I build an attached deck without a permit if it's under 200 square feet?

No. Birmingham does not exempt attached decks under any size threshold. If the deck is attached to your house (shares a ledger board with the rim joist), a permit is required, period. This differs from Michigan's IRC baseline, which exempts freestanding decks under 200 square feet and 30 inches above grade. Attached decks are not freestanding and are not exempt. The city enforces this uniformly — unpermitted decks trigger stop-work orders and can block refinance or sale.

How deep do my deck footings need to be?

42 inches below finished grade, minimum. This is Birmingham's adopted frost-depth requirement per the Michigan Building Code. If you go shallow (e.g., 36 inches), frost heave will lift the posts in winter, causing the deck to separate from the house ledger and leading to water intrusion and rot. The Building Department inspector will measure footing depth at pre-pour inspection; shallow footings will fail inspection and must be re-excavated.

Do I need a ledger flashing detail on my deck plans?

Yes. IRC R507.9 requires flashing behind the ledger, and the Birmingham Building Department plan reviewer will ask to see a detail showing the flashing (26-gauge galvanized steel or heavier), the bend direction (down and out over the rim joist), and sealant at the bottom edge (polyurethane caulk or 100% silicone). This detail is non-negotiable and checked during framing inspection. Many homeowners skip it on the first submission and receive a deficiency notice; include it to avoid delays.

What if my deck is in the Cranbrook Village Historic District?

Your plans will be routed to the Historic District Commission for review in addition to the Building Department's structural review. This adds 3–4 weeks to the approval timeline (the HDC meets monthly or bimonthly). The HDC reviews design compatibility with the district's architectural standards — materials, colors, finishes. You may incur an additional HDC review fee (typically $0–$200). Submit deck plans to the city; the city will forward them to the HDC automatically if your property is in a historic district.

How much does a deck permit cost in Birmingham?

Permit fees are based on estimated project valuation, typically 1.5–2% of construction cost. A 300 sq ft composite deck (estimated $15,000–$18,000) costs $250–$350 for the permit. A larger deck with stairs and slope work (estimated $20,000–$25,000) costs $350–$500. Soils engineer reports (if required) cost $500–$1,500 separately. Historic District Commission review adds $0–$200 if applicable. Get a permit fee estimate from the Building Department by phone or through the online portal.

Can I install a deck without hiring a licensed contractor?

Yes, if the house is owner-occupied and you are the owner. Michigan allows owner-builder permits for residential projects. You'll still need a permit and must pass all inspections (footing pre-pour, framing, final). If you hire a contractor, they must be licensed. The Building Department will verify contractor licensing at plan submission. If you're doing the work yourself, note 'owner-builder' on the permit application and be prepared to answer inspection questions directly.

What happens at the framing inspection?

The inspector checks: (1) Ledger board bolted to rim joist (1/2-inch bolts, 16 inches on center) with flashing installed and sealed; (2) Beam-to-post connections with lateral-load devices (e.g., Simpson DTT) installed and bolted; (3) Post footings below the 42-inch frost line (visual confirmation or photos); (4) Stair stringers (if applicable) properly dimensioned and attached; (5) Guardrail mounting (if applicable) secure and compliant. The inspector typically spends 20–30 minutes on site. Bring your approved permit plans and a copy of the code section references if you have questions. If anything fails, the inspector posts a yellow deficiency card; you correct it and call for re-inspection (no fee).

Do I need stairs or railings on my deck?

Stairs are required if the deck surface is more than 30 inches above grade and is not accessible by an existing door or ramp. Stair geometry is per IRC R311.7: treads must be 10 inches deep (measured nosing to nosing), risers 7–7.75 inches tall, and the landing platform at least 36x36 inches. Railings (guards) are required if the deck surface is more than 30 inches above grade, and the railing must be 36 inches tall minimum (measured from the deck surface) and resist a 200-pound horizontal load. Balusters must be spaced so a 4-inch sphere cannot pass between them. Ground-level decks (under 30 inches) do not require railings but may have them for aesthetics.

How long does it take to get a deck permit approved in Birmingham?

Plan review typically takes 2–3 weeks for a standard attached deck if your plans are complete and show all required details (ledger flashing, footing section, beam spans, stair geometry, guardrail design). If your plans are incomplete or unclear, the reviewer issues a deficiency notice, and resubmission adds 1–2 weeks. Historic District Commission overlay (if applicable) adds 3–4 weeks. Once approved, construction and inspections typically take 1–2 weeks. Total from application to final inspection: 4–7 weeks depending on complexity and season.

What if I build my deck and then find out I needed a permit?

The city will issue a stop-work order, fine you $500–$1,500, and require you to apply for a retroactive permit at double the normal fee. The deck must be inspected and brought into compliance (e.g., footings documented, flashing installed, railings corrected). If the deck cannot be brought into compliance, it may be ordered removed. Alternatively, the deck will be flagged on the Title Commitment Disclosure Statement, blocking refinance and forcing disclosure to any future buyer — can cost thousands in negotiation fallout. Avoid this by pulling the permit first; the permit fee is cheap insurance.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current deck (attached to house) permit requirements with the City of Birmingham Building Department before starting your project.

Keep researching

Deck (Attached to House) permits in other Michigan cities
Other permits in Birmingham
Deck (Attached to House) permits in popular cities
Browse all

More permit guides

National guides for the most-asked homeowner permit projects. Each goes deep on code thresholds, common rejections, fees, and timeline.

Roof Replacement

Layer count, deck inspection, ice dam protection, hurricane straps.

Deck

Attached vs freestanding, footings, frost depth, ledger, height/area thresholds.

Kitchen Remodel

Plumbing, electrical, gas line, ventilation, structural changes.

Solar Panels

Structural review, electrical interconnection, fire setbacks, AHJ approval.

Fence

Height/material limits, sight triangles, pool barriers, setbacks.

HVAC

Equipment changeouts, ductwork, combustion air, ventilation, IMC sections.

Bathroom Remodel

Plumbing rough-in, ventilation, electrical (GFCI/AFCI), waterproofing.

Electrical Work

Subpermits, NEC sections, panel upgrades, GFCI/AFCI, who can pull.

Basement Finishing

Egress, ceiling height, electrical, moisture barriers, occupancy rules.

Room Addition

Foundation, footings, framing, electrical/plumbing extensions, structural.

Accessory Dwelling Units (ADU)

When permits are required, code thresholds, JADU vs ADU, electrical/plumbing/parking rules.

New Windows

Egress, header sizing, structural cuts, fire-rating, energy code.

Heat Pump

Electrical capacity, refrigerant handling, condensate, IECC compliance.

Hurricane Retrofit

Roof straps, garage door bracing, opening protection, FL OIR product approval.

Pool

Barriers, alarms, electrical bonding, plumbing, separation distances.

Fireplace & Wood Stove

Hearth, clearances, chimney, gas line work, NFPA 211.

Sump Pump

Discharge location, electrical, backup options, plumbing tie-in.

Mini-Split

Refrigerant lines, condensate, electrical disconnect, line set sleeve.