CostInMyCity

St. Louis, MO / Deck

Deck cost in St. Louis, MO

$30–$60 per sq ft; average job $8,316 (range $4,340–$12,652). A 16×20 (320 sf) table is $12,800–$19,200. Pressure-treated is the low end; second-story / high-end wood / custom is the high end.

Labor for Deck in St. Louis, MO is indexed to the BLS construction-and-extraction occupations mean hourly wage for St. Louis, MO-IL of $35.43 (May 2025), applied to the 50% labor share.

City of St. Louis Building Division is the issuing office. The typical permit fee recorded from City of St. Louis Building Division building permit fees ($25 application + $10 per $1,000 over $3,000), retrieved 2026-09-01, is $145. Fee model: valuation.

The national typical for this job is $45. Materials stay at the national figure while labor is wage-indexed for St. Louis, MO.

Walking surface only. A 16 by 20 deck is 320 sqft.

Typical all-in

$15,507

Job cost plus the recorded local permit fee at this size.

Low
$10,348
Typical
$15,507
High
$20,716

Breakdown

Labor (allocated)$7,661
Materials (allocated)$7,661
Job subtotal$15,322
Permit$185
All-in typical$15,507

Labor is adjusted for construction wages in this metro. Materials stay at the national figure. This is an estimate, not a contractor quote.

Permit fee

Fee model
Based on project value
Typical fee
$185
Range
$134 – $287
Retrieved
2026-09-01
  • Application fee — $25Included.
  • Building permit fee — $120Included.

Typical $12,000: $25 + $10×12 = $145.00. Typical-job spec 16×20 = 320 sf.

Attached residential deck uses the building-permit valuation table. City of St. Louis, not St. Louis County.

City of St. Louis Building Division building permit fees ($25 application + $10 per $1,000 over $3,000)

Citations

  1. How Much Does It Cost to Build a Deck? [2026 Data] Retrieved Aug 12, 2026. Average $8,316; $4,340–$12,652; $30–$60/sf; labor $15–$35/sf.
  2. City of St. Louis Building Division building permit fees ($25 application + $10 per $1,000 over $3,000) Retrieved Aug 31, 2026. Attached residential deck uses the building-permit valuation table. City of St. Louis, not St. Louis County.
  3. BLS OEWS construction wages — St. Louis, MO-IL BLS OEWS construction-and-extraction mean hourly wage / national same vintage, applied to laborShare only. Not a city-specific bid survey.

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