Licensed deck contractors and builders serving St. Louis, Missouri. License data and local permit requirements.
Last updated: April 2026 · Cost data from RSMeans & BLS regional indices · Permit data from official city .gov sources
Family-owned full-service deck contractor and retailer with a showroom, innovating deck design and construction in St. Louis since 1990.
Premium deck builder serving St. Louis and St. Charles counties since 1991, specializing in innovative custom decking and outdoor living solutions.
Family-owned Kirkwood-based company with a 2,000 sq ft showroom and over 30 years of experience building custom decks and outdoor structures in St. Louis.
Family-owned, veteran-owned, and women-owned deck building company established in 2009, creating luxury outdoor living spaces throughout Greater St. Louis.
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A short checklist of things to verify before you sign a contract or hand over a deposit. These apply whether you find your contractor here, on Angi, or anywhere else.
Every contractor we list is verified against public records, but verification is not a quality guarantee. Run through this checklist on any contractor you are seriously considering.
Follow these steps to find a reliable, licensed deck builder in the St. Louis, Missouri area.
Verify licenses and insurance
Check with your state licensing board. Ensure they carry general liability and workers compensation insurance.
Get 3+ written estimates
Compare detailed quotes that break down materials, labor, permits, and timeline. Avoid verbal-only estimates.
Check reviews and references
Look at Google reviews, BBB ratings, and ask for 2-3 references from recent local projects.
Confirm who pulls the permit
A reputable contractor pulls the building permit themselves — never agree to skip the permit.
Review the contract carefully
The contract should include scope of work, materials, timeline, payment schedule, warranty, and change order process.
Never pay more than 30% upfront
Standard payment schedules are 10-30% deposit, progress payments, and final payment upon completion and inspection.
Average deck building costs in St. Louis based on Missouri labor rates and material prices. Costs are for a typical 300 sq ft deck with railing.
| Service | Low | Average | High |
|---|---|---|---|
| Pressure-Treated Wood Deck | $5,167 | $6,624 | $8,744 |
| Cedar Deck | $7,176 | $9,200 | $12,144 |
| Composite Deck (Trex, TimberTech) | $10,046 | $12,880 | $17,002 |
Costs are estimates based on Missouri regional data. Actual prices vary by project complexity, site conditions, and contractor. Permit fees ($69–$460 in MO) are not included.
Get a Personalized EstimateSt. Louis requires a building permit for most deck projects. Here are the key details:
Fees
$25 application fee + valuation-based permit fee. $0-$1,000 project: $19 permit fee ($44 total). $1,001-$2,000: $23 ($48 total). $2,001-$3,000: $30 ($55 total). Over $3,000: $10 per $1,000 of estimated cost.
Processing Time
Not published. Multiple city agencies review the application. Permit is issued after all approvals received and permit fee is paid.
Exemptions
All decks and porches require a permit in St. Louis — no size or height exemption. Retaining walls ≤18 inches are exempt but decks are not.
Building Code
2018 International Residential Code (IRC) — Ordinance 70795, adopted August 1, 2018. 2018 IBC — Ordinance 70794.
St. Louis-Specific Rules
The average cost to build a 300 sq ft deck in St. Louis ranges from $5,167 for pressure-treated wood to $17,002 for composite materials. The final price depends on materials, size, elevation, railing, and whether your project requires a permit. Use our free deck cost calculator for a personalized estimate.
Most cities, including St. Louis, require a building permit for decks that are attached to the house, over 200 square feet, or more than 30 inches above grade. Small, freestanding ground-level decks may be exempt. Contact the St. Louis building department or check our permit guide for specific requirements and fees.
Look for licensed and insured contractors with at least 3 years of experience. Verify their license with the Missouri licensing board, check Google reviews and BBB ratings, ask for 3+ written quotes, and request references from recent projects in the St. Louis area. Never pay more than 30% upfront.
The best material depends on your climate and budget. Composite decking (like Trex or TimberTech) is the most popular choice in Missouri due to low maintenance and 25-30 year lifespan. Pressure-treated wood is the most affordable at $17-$41 per sq ft installed. Cedar offers natural beauty but requires regular sealing.
A typical 200-400 sq ft deck takes 3-7 days to build once the permit is approved and materials are delivered. Permit approval in St. Louis can take 1-4 weeks depending on your local building department's workload. Plan for 4-8 weeks total from signing a contract to project completion.
Ask about their license and insurance coverage, who pulls the building permit, their warranty on labor and materials, a detailed written estimate, their timeline, and whether they use subcontractors. Also ask to see photos of recent deck projects in St. Louis and request at least 2-3 references.
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Fees: $25 application fee + valuation-based permit fee. $0-$1,000 project: $19 permit fee ($44 total). $1,001-$2,000: $23 ($48 total). $2,001-$3,000: $30 ($55 total). Over $3,000: $10 per $1,000 of estimated cost.
Timeline: Not published. Multiple city agencies review the application. Permit is issued after all approvals received and permit fee is paid.
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PermitDeck is a directory service, not a referral service. We do not guarantee any contractor's work quality, licensing status, or availability. Listings may include unverified information. Always verify credentials independently, check references, and get multiple written quotes before hiring any contractor.