Deck damage creeps up slowly—a soft spot here, sun-bleached boards there—but repair bills add up fast. Knowing what you'll actually pay before calling a contractor separates smart homeowners from those who get blindsided at the quote stage.
Wood vs. Composite: Starting Price Points
Your deck material shapes repair costs dramatically. Wood decks (pressure-treated pine, cedar, redwood) run $1,200–$3,500 for moderate structural repairs plus refinishing, while composite decks (Trex, TimberTech) typically cost $1,500–$4,000 because replacement boards are pricier and installation requires precision fitting. If you're only staining or sealing an existing wood deck with no structural work, expect $800–$2,000 depending on square footage and deck condition.
Structural Repairs: The Real Money
This is where costs spike. A single rotted joist or ledger board replacement runs $400–$800 per board, plus labor. If water damage has spread to multiple support beams—common in older decks without proper flashing—you're looking at $2,000–$6,000+ for that section alone. Before hiring anyone, get a structural inspection ($150–$300) to identify all damage. Skip this and you'll discover hidden rot mid-project, which always costs more to fix.
Loose or failing fasteners throughout the deck typically cost $500–$1,500 to replace, depending on deck size.
Surface Work: Staining, Sealing, and Refinishing
This is where most homeowners spend their money:
- Power washing only: $200–$600 (removes debris, mold, algae)
- Stain + sealer (wood): $1,000–$3,000 for 300–500 sq. ft.; $2–$6 per square foot is typical
- Composite deck cleaning + protective coating: $600–$1,800 (composite requires gentler methods)
- Full refinish (strip, sand, stain, seal): $2,500–$5,000+ for average decks
Darker stains generally cost 10–15% more than lighter shades because they require more coats for even coverage. If your deck has multiple stain colors or complex patterns, add 20–30% to the quote.
Labor Timelines and Hidden Costs
A standard 400 sq. ft. deck repair takes 3–5 days if structural work is minimal; add 2–3 days if boards need replacing. Contractors typically charge $35–$75 per hour for labor or $500–$1,500 per day for a crew. Don't forget:
- Deck permits: $50–$200 depending on your municipality (required for structural repairs in most places)
- Removal and disposal: $200–$500 if old decking or significant debris requires hauling
- Pressure treatment or wood stabilizer: $100–$300 to prevent future rot
- Railings or stair repairs: $300–$1,000 per section
Weather delays happen—rain stops work, and stain needs 48 hours dry time. Budget 1–2 extra days into your timeline.
What to Compare When Getting Quotes
Don't just look at total price. Compare these specifics:
- Preparation included? Genuine deck repair includes power washing, sanding if needed, and old sealer removal. If a quote skips this, stain won't adhere properly.
- Warranty length. Quality stain jobs come with 2–3 year warranties on the finish. Get it in writing.
- Product quality. Ask which stain brand and sealer they use. Premium products (Cabot, Behr Premium) last longer than budget options.
- Structural assessment. Reputable contractors inspect joists, ledger boards, and fasteners without charging extra.
If you're comparing multiple contractors, request itemized quotes that break down labor, materials, and specific repairs. Generic "full refinish for $2,400" tells you nothing about what's actually included.
Mercoly lets you compare deck repair and staining providers in your area, see their work portfolios, and read customer reviews—eliminating the guesswork when you're vetting multiple quotes.
Frequently Asked Questions
Q: Should I repair my deck or replace it? If repairs exceed 50% of replacement cost, replacement makes financial sense. For a 16x12 deck, that's roughly $4,000–$5,000. Most repairs fall below this threshold, but get both quotes to be sure.
Q: How long does stain last on a deck? Quality stain lasts 2–3 years in moderate climates; 1–2 years in harsh sun or wet climates. Composite coatings last 3–5 years but require gentler maintenance.
Q: Do I need to stain every year? No. A single coat every 2–3 years maintains protection. Annual maintenance means power washing and touching up worn spots, not full restaining.
Compare deck repair quotes from trusted local contractors today—get accurate pricing and timelines for your specific deck.