How to Bid a Deck Job in 6 Clear Steps

Bidding a deck job requires calculating material costs, labor hours, and profit margins. Start with precise measurements, then estimate lumber, hardware, and tools. Factor in labor rates (typically 30-50% of total costs) and add 10-20% for overhead/profit. Always include a detailed scope of work to avoid disputes.

Step 1: Measure and Scope the Project

  • Deck dimensions: Measure length, width, and height. Account for stairs, railings, and unusual angles.
  • Material type: Pressure-treated wood, composite, cedar, or PVC-each affects cost and labor.
  • Extras: Built-in seating, lighting, or pergolas increase complexity and price.
  • Site prep: Note demolition, grading, or concrete footings needed.

Step 2: Calculate Material Costs

Material Unit Cost (Est.) Quantity Example (12'x16' Deck) Subtotal
Pressure-treated lumber (joists, beams) $0.80-$2.50/linear ft 500 ft $400-$1,250
Decking boards (wood) $1.50-$4.00/sq. ft 192 sq. ft $288-$768
Composite decking $4.00-$12.00/sq. ft 192 sq. ft $768-$2,304
Concrete footings $10-$20each 9 footings $90-$180
Railings (per linear ft) $15-$50 40 ft $600-$2,000
Hardware (screws, brackets, etc.) - - $100-$300

Step 3: Estimate Labor Hours

  • Small deck (10'x12'): 20-30 hours (2-3 days with 2 workers).
  • Medium deck (12'x16'): 30-50 hours (3-5 days).
  • Large/complex deck (16'x20'+): 50-100+ hours (1-2 weeks).
  • Labor rate: $25-$75/hour per worker (varies by skill level).
  • Subcontractors: Add 10-20% for electricians (lighting) or masons (footings).

Step 4: Add Overhead and Profit

  1. Overhead (10%): Covers tools, insurance, travel, and permits.
  2. Profit (10-20%): Standard markup for sustainable business growth.
  3. Contingency (5%): Buffer for unexpected costs (e.g., rotten wood, weather delays).

Step 5: Choose a Bidding Method

Method Pros Cons Best For
Fixed Price Clear for client, higher profit if efficient Risk of underbidding if scope changes Simple, well-defined projects
Cost-Plus Covers all costs + agreed profit margin Client may scrutinize expenses Complex or uncertain projects
Time & Materials Flexible for changes, transparent Harder to predict final cost for client Repairs or custom designs

Step 6: Present the Bid Professionally

  • Itemized breakdown: List materials, labor, and fees separately.
  • Payment schedule: Example: 30% deposit, 40% mid-project, 30% on completion.
  • Timeline: Start/end dates with weather contingencies.
  • Exclusions: Clarify what's not included (e.g., landscaping, painting).
  • Warranty: Specify coverage (e.g., 1-year labor, manufacturer's material warranty).

Common Mistakes to Avoid

  • Underestimating labor: Deck builds often take longer than expected.
  • Ignoring permits: Research local codes; fees can add $100-$500.
  • Skipping site inspection: Uneven ground or hidden obstacles inflate costs.
  • Lowballing: Winning a bid with thin margins hurts profitability.
  • Vague contracts: Always define change-order processes upfront.