Deck Building Cost in Baton Rouge, LA (2026)
Updated October 2026 · Baton Rouge, LA · index 0.95
How much does it cost to build a deck in Baton Rouge? For a 300 sq ft deck with pressure-treated wood, homeowners in Baton Rouge, LA pay about $10,700 on average, and most quotes land between $7,400 and $14,000 — $25 to $47 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 Baton Rouge runs 5% below the U.S. average: construction labor in the Baton Rouge area runs 9% below the national mean, materials sit at the national level. The same job averages $11,300 nationally and about $10,100 at the Louisiana statewide index.
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Deck building price in Baton Rouge by decking material
What a 300 sq ft deck costs in Baton Rouge with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$36 per sq ft | $10,700$7,400 – $14,000 |
| Capped compositehidden fasteners and a picture-frame border$43 per sq ft | $12,800$9,100 – $16,500 |
The least expensive option in Baton Rouge is pressure-treated wood, at about $10,700; capped composite averages $12,800, 1.2 times as much.
Cost to build a deck in Baton Rouge by size
With pressure-treated wood, priced for Baton Rouge, LA:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$38 per sq ft | $7,700$5,250 – $10,100 |
| A 300 sq ft deck$36 per sq ft | $10,700$7,400 – $14,000 |
| A 400 sq ft deck$34 per sq ft | $13,700$9,550 – $17,900 |
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: $34 per sq ft for a 400 sq ft deck against $38 for a 200 sq ft deck.
What a deck building in Baton Rouge includes
Line by line, the $10,700 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $350 – $1,050 |
| Ground prep, fabric and gravel | $210 – $520 |
| Footings below the frost line | $390 – $790 |
| Flashed ledger on the house | $240 – $460 |
| 6x6 posts | $260 – $520 |
| Beams | $240 – $460 |
| Joist framing with hangers | $1,350 – $2,300 |
| Deck boards | $1,250 – $1,900 |
| One set of stairs (4 steps) | $490 – $980 |
| Railing | $1,800 – $3,100 |
| Fascia and skirting | $340 – $820 |
| Final inspection and cleanup | $140 – $350 |
| Stain and seal, two coats | $310 – $730 |
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 Baton Rouge's index of 0.95; permit fees are not scaled.
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What affects deck building prices in Baton Rouge
Labor and materials in Baton Rouge
Construction wages in the Baton Rouge metro run 11% below the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that up by 2%, to 9% below the national mean. Materials in the area's ZIP codes price right at the national average. Together they give Baton Rouge a construction cost index of 0.95.
Where Baton Rouge sits in Louisiana
Baton Rouge is the 2nd most expensive of the 5 Louisiana cities in our index, against a statewide index of 0.90. New Orleans is the dearest at 0.96; Metairie is the least expensive at 0.88.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Baton Rouge ranks 212th from the most expensive. The job that averages $10,700 here averages $11,300 at the national rate.
Frost depth in Louisiana
Louisiana has little or no frost depth to dig below, so deck footings go to the usual minimum depth rather than a frost line. Your building department sets the exact figure.
The deck code in Louisiana
Decks here are built to the Louisiana State Uniform Construction Code — residential (2021 IRC). 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. Wind in the coastal parishes: the roof's uplift connections follow the wind map.
What decks are built of in Louisiana
Most used on decks in Texas, Oklahoma, Arkansas and Louisiana: treated pine, then capped composite, then cedar.
Sales tax in Louisiana
Louisiana's base state sales tax is 4.45%, 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 Baton Rouge contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Louisiana cities
A 300 sq ft deck with pressure-treated wood averages $10,700 in Baton Rouge; $9,900 in Metairie, $10,100 in Shreveport, $10,800 in New Orleans.
| City | Average · range |
|---|---|
| Metairie, LA7% less | $9,900$6,850 – $13,000 |
| Shreveport, LA5% less | $10,100$7,000 – $13,200 |
| New Orleans, LA1% more | $10,800$7,450 – $14,100 |
| Lafayette, LA5% less | $10,100$7,000 – $13,200 |
deck building price in Baton Rouge: questions
How much does it cost to build a deck in Baton Rouge, LA?
About $10,700 for a 300 sq ft deck with pressure-treated wood, and most Baton Rouge quotes fall between $7,400 and $14,000. That is 5% below the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Baton Rouge?
$25 to $47 per sq ft, about $36 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 Baton Rouge?
$9,550 to $17,900, about $13,700 on average, with pressure-treated wood — $34 per sq ft.
Do you need a permit for deck building in Baton Rouge?
Yes — a new deck needs a permit nearly everywhere, Baton Rouge included. In Louisiana, decks follow the Louisiana State Uniform Construction Code — residential (2021 IRC). The prices on this page carry $350–$1,050 for plans, permit and layout.
Does the price include sales tax in Louisiana?
No. The prices here are before tax; Louisiana's base state rate is 4.45%, plus any local rate.
What decking do people choose in Louisiana?
Most used on decks in Texas, Oklahoma, Arkansas and Louisiana: treated pine, then capped composite, then cedar.
Other home projects in Baton Rouge
Deck building cost in Louisiana
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 Baton Rouge's construction cost index of 0.95.
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 Baton Rouge, each on its own base: RSMeans residential 0.88, HUD 0.91, Craftsman 1.15. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Baton Rouge 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