Carpentry Cost Estimating: Lumber Pricing, Labor Rates, and Bid Math

Carpentry cost estimating turns your stud counts and door schedules into real dollars. This guide breaks down lumber per board foot, carpenter labor rates, productivity, waste factor, and markup so your next bid holds up through the full job.

1. Carpentry Cost Per Square Foot

The first thing every GC or owner asks: "what does carpentry cost per square foot?" Again, the honest answer depends on scope. But these 2026 ranges give you a reality check:

Rough framing (wood frame)

• Simple residential light-frame: $10–$14/SF of floor area.
• Mid-complexity residential: $14–$18/SF.
• Commercial light-frame (small office, retail): $15–$22/SF.
• Heavy wood frame or mass timber: $25–$55/SF.

Finish carpentry

• Residential trim package (base, case, doors): $3–$6/SF of floor area.
• Mid-grade commercial tenant improvement: $4–$9/SF floor area.
• High-end custom millwork: $12–$40+/SF floor area.

2. Labor Rates and Productivity

Carpenter labor is the biggest single line on most carpentry bids, typically 45–65% of total cost.

Hourly labor rates (2026)

• Open-shop carpenter base: $30–$48/hr.
• Open-shop fully burdened: $55–$90/hr.
• Union carpenter base: $48–$75/hr + $22–$38/hr fringe.
• Apprentice (1st–3rd year): $20–$32/hr base.
• Finish carpenter / cabinetmaker: base wage + $5–$15/hr premium.
• Foreman: +$6–$14/hr over journeyman.

Production rates

• Wall framing (simple layout): 300–500 LF per carpenter per day.
• Sheathing: 100–150 SF per carpenter per hour.
• Joist/floor system: 400–700 SF of floor per 3-person crew per day.
• Door hung (prehung residential): 8–15 doors per carpenter per day.
• Commercial hollow metal door: 3–5 doors per carpenter per day with frame.
• Base trim install: 80–150 LF per carpenter per hour.
• Crown molding: 40–80 LF per carpenter per hour (more cuts, more ladders).

3. Lumber and Material Cost

Lumber prices move faster than almost any other construction material. What is true today may not be true in 30 days. Always confirm with a current supplier quote.

Typical dimension lumber pricing (2026)

• SPF 2x4x8: $3.50–$6.00 per piece.
• SPF 2x6x8: $5.50–$9.00 per piece.
• Douglas fir 2x10x12: $22–$38 per piece.
• Pressure-treated 2x6x12: $22–$40 per piece.
• Per board foot, SPF: $0.60–$1.10.
• Per board foot, Douglas fir: $0.85–$1.50.

Sheathing

• 7/16" OSB 4x8: $18–$30 per sheet.
• 15/32" CDX plywood: $28–$48 per sheet.
• 3/4" T&G subfloor OSB: $32–$55 per sheet.
• ZIP System 7/16": $35–$55 per sheet.

Fasteners and consumables

Framing nails, subfloor adhesive, Simpson ties, screws, and other consumables run 2–4% of lumber material cost. Do not forget them. On a $40,000 lumber package that is $800–$1,600 in hardware alone.

4. Engineered Lumber Pricing

Engineered wood products (EWPs) cost more per piece than dimension lumber but save labor through longer clear spans and fewer posts.

Typical EWP pricing (2026)

• LVL 1.75x9.5: $4–$6.50 per LF.
• LVL 1.75x14: $7.50–$10 per LF.
• PSL column 5.25x5.25: $15–$25 per LF.
• Glulam 5-1/8 × 12 GLB: $18–$30 per LF.
• 11-7/8" I-joist: $4–$7 per LF.
• Wood floor truss (28 ft): $120–$220 each.
• Wood roof truss (30 ft, 6:12): $150–$300 each.

5. Door and Hardware Pricing

Doors are a meaningful cost line. Price them by opening, not just by leaf.

Door unit pricing (material only, installed below)

• Prehung interior residential door: $120–$280.
• Commercial solid-core wood door: $350–$750.
• Hollow metal door: $250–$600.
• Hollow metal frame (knock-down): $180–$400.
• Fire-rated 90-min door assembly: $800–$1,800 as a package.

Installed cost per commercial door

• Interior wood door, HM frame, basic hardware: $600–$1,200 installed.
• Hollow metal pair with closer, panic, and astragal: $2,500–$5,000 installed.
• Storefront-style aluminum door: $1,800–$4,500 installed.

Hardware set pricing

Typical commercial hardware sets run $300 (basic passage) to $3,500 (exit device, closer, electrified lock, card reader integration). Get hardware quotes from a distributor, never guess.

6. Trim and Millwork Pricing

Finish carpentry pricing is driven by material grade and profile complexity.

Trim material costs

• MDF 5-1/4" base: $1.20–$2.00 per LF.
• Primed pine 5-1/4" base: $1.50–$2.50 per LF.
• Oak 5-1/4" base, stain grade: $3.50–$6.00 per LF.
• Crown molding, MDF: $1.50–$3.00 per LF.
• Crown molding, hardwood stain grade: $4–$10 per LF.

Installed pricing

• Base trim installed, paint-grade: $2.50–$5 per LF.
• Base trim installed, stain-grade hardwood: $5–$12 per LF.
• Crown molding installed: $4–$12 per LF.
• Chair rail or wainscoting: $6–$20 per LF depending on profile.

Millwork

Custom casework runs $200–$500 per LF for paint-grade base cabinets, $400–$900 per LF for hardwood with adjustable shelves and soft-close hardware. Reception desks, libraries, and architectural millwork are quoted as one-off items. Always get 2–3 shop quotes for custom work.

7. Waste Factor

Carpentry waste factor accounts for the cutoffs, mistakes, and defects that never make it onto the finished building.

Standard waste factors

• Framing lumber: 10–15%.
• Sheathing: 5–10%.
• Subfloor: 5%.
• Blocking: 15%.
• Paint-grade trim: 10%.
• Stain-grade trim with grain match: 15–20%.
• Engineered lumber: 0–3% (cut to length, minimal waste).
• Trusses: 0% (pre-fabricated).

8. Overhead and Markup

The final bid number is direct cost + overhead + profit. Skip any piece and you lose money.

Overhead

Carpentry shop overhead typically runs $18–$40 per billable labor hour (trucks, tools, insurance, shop, office). Applied as a percentage to direct cost it is usually 12–20%.

Labor burden

Carpenters are a medium-high workers comp class (~7–12% of payroll). Add FICA, FUTA, SUTA, health insurance, PTO, and you land at 35–55% burden on base wage.

Typical carpentry markup

• Framing subcontractor, large commercial: 18–28% total.
• Mid-size commercial: 25–38%.
• Residential carpentry: 30–50%.
• Custom millwork shop: 50–100%+.

9. Regional Cost Swings

Carpentry pricing varies wildly by market. A framing job billed at $12/SF in rural Texas might hit $22/SF in Seattle. Key drivers:

• Labor market: union density, local prevailing wage.
• Lumber supply: regions closer to mills usually pay less.
• Seismic or wind zones: more shear walls, more blocking, more hold-downs, more engineering.
• Permit/licensing: some markets require licensed framing contractors with bond and insurance minimums.
• Weather: rainy climates extend schedules which raises labor cost.

10. Putting the Bid Together

A clean carpentry estimating cost workbook flows: quantities → lumber (with waste) → EWP from supplier quotes → doors, frames, hardware → trim and millwork → labor hours at realistic production × burdened rate → consumables → equipment (nailers, compressors, lifts) → sales tax → subtotal → overhead → profit → bid price. Show the math to yourself on every line so post-job analysis is easy. When you win the job and actuals come in, you will know exactly where you made money and where you did not.