Deck Building Cost in Ann Arbor, MI (2026)
Updated October 2026 · Ann Arbor, MI · index 1.04
How much does it cost to build a deck in Ann Arbor? For a 300 sq ft deck with pressure-treated wood, homeowners in Ann Arbor, MI pay about $11,700 on average, and most quotes land between $8,100 and $15,300 — $27 to $51 per sq ft. The price covers plans and the permit, footings, a framed and flashed structure, the deck boards, railing, one set of stairs, fascia and cleanup.
The deck building price in Ann Arbor runs 4% above the U.S. average: construction labor in the Ann Arbor area runs 6% above the national mean, materials sit at the national level. The same job averages $11,300 nationally and about $11,100 at the Michigan statewide index.
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Deck building price in Ann Arbor by decking material
What a 300 sq ft deck costs in Ann Arbor with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$39 per sq ft | $11,700$8,100 – $15,300 |
| Capped compositehidden fasteners and a picture-frame border$47 per sq ft | $14,000$9,950 – $18,100 |
The least expensive option in Ann Arbor is pressure-treated wood, at about $11,700; capped composite averages $14,000, 1.2 times as much.
Cost to build a deck in Ann Arbor by size
With pressure-treated wood, priced for Ann Arbor, MI:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$42 per sq ft | $8,400$5,750 – $11,100 |
| A 300 sq ft deck$39 per sq ft | $11,700$8,100 – $15,300 |
| A 400 sq ft deck$37 per sq ft | $15,000$10,400 – $19,500 |
Some costs stay the same whatever the size — plans, permit and layout, one set of stairs (4 steps), final inspection and cleanup — so a bigger job costs less per unit: $37 per sq ft for a 400 sq ft deck against $42 for a 200 sq ft deck.
What a deck building in Ann Arbor includes
Line by line, the $11,700 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $380 – $1,150 |
| Ground prep, fabric and gravel | $230 – $570 |
| Footings below the frost line | $430 – $860 |
| Flashed ledger on the house | $260 – $500 |
| 6x6 posts | $290 – $570 |
| Beams | $260 – $500 |
| Joist framing with hangers | $1,500 – $2,500 |
| Deck boards | $1,400 – $2,050 |
| One set of stairs (4 steps) | $540 – $1,050 |
| Railing | $1,950 – $3,400 |
| Fascia and skirting | $370 – $900 |
| Final inspection and cleanup | $150 – $380 |
| Stain and seal, two coats | $340 – $800 |
Each line is the price book's U.S. rate for that step, scaled by 0.74 to the installed price published sources give for the whole job (see how these prices are built), times Ann Arbor's index of 1.04; permit fees are not scaled.
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What affects deck building prices in Ann Arbor
Labor and materials in Ann Arbor
Construction wages in the Ann Arbor area run 6% above the U.S. mean (BLS, May 2025), and materials in its ZIP codes price right at the national average. Together they give Ann Arbor a construction cost index of 1.04.
Where Ann Arbor sits in Michigan
Ann Arbor ties for the most expensive of the 4 Michigan cities in our index, against a statewide index of 0.99. Grand Rapids is the least expensive at 0.98.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Ann Arbor ranks 123rd from the most expensive. The job that averages $11,700 here averages $11,300 at the national rate.
Frost depth in Michigan
Deck footings go below the frost line, or they heave by the second spring. The typical code frost depth in Michigan is about 42 in. — deep holes, more concrete and more digging time than in the South. Your building department sets the exact figure.
The deck code in Michigan
Decks here are built to the 2015 Michigan Residential Code (2015 IRC with Michigan amendments). Guards are required at 36 in. where the deck is more than 30 in. up, and stair risers can be up to 8.25 in. Stairs: risers up to 8¼ in. on treads at least 9 in. deep (Michigan's amendment to R311.7.5); the IRC's 7¾ and 10 are the stricter figure where an inspector asks for it.
What decks are built of in Michigan
Most used on decks in the Great Lakes states: capped composite, then treated pine, then cedar.
Sales tax in Michigan
Michigan's base state sales tax is 6%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Ann Arbor contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Michigan cities
A 300 sq ft deck with pressure-treated wood averages $11,700 in Ann Arbor; $11,700 in Detroit, $11,000 in Grand Rapids, $11,300 in Lansing.
| City | Average · range |
|---|---|
| Detroit, MIsame as Ann Arbor | $11,700$8,100 – $15,300 |
| Grand Rapids, MI6% less | $11,000$7,650 – $14,400 |
| Lansing, MI4% less | $11,300$7,800 – $14,700 |
deck building price in Ann Arbor: questions
How much does it cost to build a deck in Ann Arbor, MI?
About $11,700 for a 300 sq ft deck with pressure-treated wood, and most Ann Arbor quotes fall between $8,100 and $15,300. That is 4% above the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Ann Arbor?
$27 to $51 per sq ft, about $39 on average with pressure-treated wood. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 400 sq ft deck in Ann Arbor?
$10,400 to $19,500, about $15,000 on average, with pressure-treated wood — $37 per sq ft.
Do you need a permit for deck building in Ann Arbor?
Yes — a new deck needs a permit nearly everywhere, Ann Arbor included. In Michigan, decks follow the 2015 Michigan Residential Code (2015 IRC with Michigan amendments). The prices on this page carry $380–$1,150 for plans, permit and layout.
Does the price include sales tax in Michigan?
No. The prices here are before tax; Michigan's base state rate is 6%, plus any local rate.
What decking do people choose in Michigan?
Most used on decks in the Great Lakes states: capped composite, then treated pine, then cedar.
Other home projects in Ann Arbor
Deck building cost in Michigan
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The deck building is priced step by step, then multiplied by Ann Arbor's construction cost index of 1.04.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: pressure-treated wood × 0.74 (HomeGuide 2026: $25–$50 per sq ft); capped composite × 0.80 (Ergeon 2026: $30–$60 per sq ft).
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Ann Arbor, each on its own base: RSMeans residential 0.97, Craftsman 1.08. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Ann Arbor build quotes like these with JobFlex's Deck Studio.
- HomeGuide 2026: pressure-treated deck $25-$50/sqft installed, labor $15-$30/sqft
- Ergeon 2026: composite deck $30-$60/sqft installed
- HomeGuide 2026: composite railing $25-$60/lf, aluminum $50-$200/lf installed