Deck Building Cost in Frederick, MD (2026)
Updated October 2026 · Frederick, MD · index 1.00
How much does it cost to build a deck in Frederick? For a 300 sq ft deck with pressure-treated wood, homeowners in Frederick, MD pay about $11,300 on average, and most quotes land between $7,800 and $14,700 — $26 to $49 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 Frederick runs right at the U.S. average: construction labor in the Frederick area runs 1% below the national mean, materials 1% above. The same job averages $11,300 nationally and about $11,300 at the Maryland statewide index.
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Deck building price in Frederick by decking material
What a 300 sq ft deck costs in Frederick with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$38 per sq ft | $11,300$7,800 – $14,700 |
| Capped compositehidden fasteners and a picture-frame border$45 per sq ft | $13,500$9,600 – $17,400 |
The least expensive option in Frederick is pressure-treated wood, at about $11,300; capped composite averages $13,500, 1.2 times as much.
Cost to build a deck in Frederick by size
With pressure-treated wood, priced for Frederick, MD:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$40 per sq ft | $8,100$5,550 – $10,600 |
| A 300 sq ft deck$38 per sq ft | $11,300$7,800 – $14,700 |
| A 400 sq ft deck$36 per sq ft | $14,400$10,000 – $18,800 |
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: $36 per sq ft for a 400 sq ft deck against $40 for a 200 sq ft deck.
What a deck building in Frederick includes
Line by line, the $11,300 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $370 – $1,100 |
| Ground prep, fabric and gravel | $220 – $550 |
| Footings below the frost line | $410 – $830 |
| Flashed ledger on the house | $250 – $480 |
| 6x6 posts | $280 – $550 |
| Beams | $250 – $480 |
| Joist framing with hangers | $1,450 – $2,450 |
| Deck boards | $1,300 – $2,000 |
| One set of stairs (4 steps) | $510 – $1,050 |
| Railing | $1,900 – $3,300 |
| Fascia and skirting | $360 – $860 |
| Final inspection and cleanup | $150 – $370 |
| Stain and seal, two coats | $330 – $770 |
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 Frederick's index of 1.00; permit fees are not scaled.
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What affects deck building prices in Frederick
Labor and materials in Frederick
Construction wages in the Frederick metro run 4% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that down by 5%, to 1% below the national mean. Materials in the area's ZIP codes price 1% above the national average. Together they give Frederick a construction cost index of 1.00.
Where Frederick sits in Maryland
Frederick is the 4th most expensive of the 5 Maryland cities in our index, against a statewide index of 1.00. Annapolis is the dearest at 1.01; Baltimore is the least expensive at 0.98.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Frederick ranks 163rd from the most expensive. The job that averages $11,300 here averages $11,300 at the national rate.
Frost depth in Maryland
Deck footings go below the frost line, or they heave by the second spring. The typical code frost depth in Maryland is about 24 in.. Your building department sets the exact figure.
The deck code in Maryland
Decks here are built to the Maryland Building Performance Standards (2021 IRC with Maryland amendments; the county adds its own). Guards are required at 36 in. where the deck is more than 30 in. up, and stair risers can be up to 7.75 in.
What decks are built of in Maryland
Most used on decks in the South Atlantic states: treated pine, then capped composite, then cedar.
Sales tax in Maryland
Maryland'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 Frederick contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Maryland cities
A 300 sq ft deck with pressure-treated wood averages $11,300 in Frederick; $11,400 in Silver Spring, $11,400 in Bethesda, $11,400 in Annapolis.
| City | Average · range |
|---|---|
| Silver Spring, MD1% more | $11,400$7,850 – $14,900 |
| Bethesda, MD1% more | $11,400$7,850 – $14,900 |
| Annapolis, MD1% more | $11,400$7,850 – $14,900 |
| Baltimore, MD2% less | $11,000$7,650 – $14,400 |
deck building price in Frederick: questions
How much does it cost to build a deck in Frederick, MD?
About $11,300 for a 300 sq ft deck with pressure-treated wood, and most Frederick quotes fall between $7,800 and $14,700. That is right at the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Frederick?
$26 to $49 per sq ft, about $38 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 Frederick?
$10,000 to $18,800, about $14,400 on average, with pressure-treated wood — $36 per sq ft.
Do you need a permit for deck building in Frederick?
Yes — a new deck needs a permit nearly everywhere, Frederick included. In Maryland, decks follow the Maryland Building Performance Standards (2021 IRC with Maryland amendments; the county adds its own). The prices on this page carry $370–$1,100 for plans, permit and layout.
Does the price include sales tax in Maryland?
No. The prices here are before tax; Maryland's base state rate is 6%, plus any local rate.
What decking do people choose in Maryland?
Most used on decks in the South Atlantic states: treated pine, then capped composite, then cedar.
Other home projects in Frederick
Deck building cost in Maryland
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 Frederick's construction cost index of 1.00.
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 Frederick, each on its own base: Craftsman 1.03. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Frederick 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