A reliable estimate is what separates a profitable contractor from a busy one. This guide walks through a repeatable estimating workflow: scoping the work, estimating labor hours, doing a real material takeoff, layering in overhead and permits, and setting a profit margin you can defend. Includes 2026 labor cost benchmarks by trade.
Reference costs for common US residential projects: bathroom remodel $8,000–$20,000 (40–50% labor), kitchen remodel $25,000–$65,000 (30–40% labor), roof replacement $8,000–$18,000 (35–45% labor), interior painting $3,000–$8,000 (70–80% labor), HVAC replacement $6,000–$14,000 (25–35% labor).
Framing: $3–$8/sf. Drywall: $2–$4/sf. Interior painting: $1.50–$3.50/sf. Flooring (LVP/hardwood): $2–$5/sf. Electrical rough-in: $3–$7/sf. Plumbing rough-in: $4–$8/sf. HVAC: $4–$8/sf. Insulation: $1–$3/sf. General construction (all trades): $20–$50/sf.
Scope the job in writing before pricing. Estimate labor hours by task using historical data — not best-day speed. Use fully-loaded labor rates (wage plus payroll taxes, workers comp, and liability). Do a real material takeoff with current supplier pricing and appropriate waste factors (5–20% depending on material type).
Layer in permit fees, dump fees, equipment rental, and subcontractor markup (15–25%). Apply your target gross margin by trade: electrical 35–45%, roofing 35–45%, painting 40–55%, plumbing service calls 45–60%. Document assumptions, exclusions, and material specs in every written quote.