Siding Replacement Estimating Guide for Contractors
Siding replacement costs $5–$15 per square foot installed for vinyl, $8–$15 for engineered wood, $9–$16 for fiber cement, and $8–$20 for natural wood. A typical 2,000 sq ft home (1,500 sq ft of siding area) runs $8,000–$25,000 installed. Include house wrap, trim, soffit, and fascia in your estimate. Target 35–45% gross margin on siding projects.
Siding replacement is a high-revenue exterior project that remodeling contractors can offer alongside window replacement, roofing, and exterior renovations. The key to profitable siding estimates is understanding material cost differences, labor rates by siding type, and how to accurately measure and quote exterior surface area. This guide covers pricing for every major siding material and the estimating strategies that protect your margins.
Siding Material Options and Costs
Vinyl siding dominates the replacement market at 30% market share. Standard vinyl costs $2–$5 per sq ft for materials — basic profiles from CertainTeed, Ply Gem, or Alside start at $2. Insulated vinyl siding with foam backing (CertainTeed CedarBoards, Ply Gem Mastic) runs $4–$8 per sq ft and provides added R-value and rigidity. Fiber cement siding from James Hardie (HardiePlank, HardieShingle) is the premium standard at $4–$8 per sq ft for materials. It is fire-resistant, rot-proof, termite-proof, and accepts paint beautifully. ColorPlus factory-finished James Hardie carries a 15-year color warranty and eliminates field painting. Engineered wood siding from LP SmartSide costs $3–$7 per sq ft — it looks like real wood, is lighter than fiber cement, and easier to cut and nail. Natural wood siding (cedar, redwood, pine clapboard) costs $5–$12 per sq ft for materials but requires ongoing maintenance. Cedar shingles run $6–$14 per sq ft. Stone veneer and manufactured stone (Eldorado, Cultured Stone) cost $10–$25 per sq ft installed and are typically used as accent features rather than full-house siding.
Installation Labor Rates by Material
Labor costs vary significantly by siding material due to weight, cutting requirements, and installation complexity. Vinyl siding: $2–$5 per sq ft for labor. A skilled crew of three can install 500–800 sq ft per day. Vinyl is the fastest material to install — it is lightweight, cuts easily, and locks together. Fiber cement (James Hardie): $4–$8 per sq ft for labor. A crew of three installs 200–400 sq ft per day. Fiber cement is heavy (about 2.5 lbs per sq ft), generates silica dust requiring respirators, and needs pre-drilling for nails. Blind nailing with a pneumatic nailer speeds installation. LP SmartSide: $3–$6 per sq ft for labor. Installation speed is between vinyl and fiber cement — it is lighter than fiber cement and cuts with standard woodworking tools without silica dust. Natural wood: $4–$8 per sq ft for labor depending on the profile (clapboard, shingle, board-and-batten). Staining or painting on site adds $1–$3 per sq ft. Stone veneer: $8–$15 per sq ft for labor. This is skilled masonry work requiring proper substrate, scratch coat, and careful placement. Most remodelers subcontract stone veneer installation. Overall, a 1,500 sq ft siding project takes 3–7 days depending on material choice and crew size.
Measuring and Material Takeoff
Accurate measurement is critical for siding estimates. Measure the total exterior wall area, then subtract window and door openings. For a rectangular home: multiply the perimeter by the wall height, then subtract the area of all windows and doors. For complex rooflines, measure each wall face individually, including gable ends (calculate triangle area as 0.5 x base x height). Add 10% waste factor for vinyl siding (more for complex homes with many corners and openings), 10–12% for fiber cement, and 15% for wood shingles. Count the linear feet of all trim elements: corners (inside and outside), window and door casings, soffit, fascia, J-channel, starter strip, and utility trim. Trim is frequently underestimated — on a typical home, trim materials can run $1,000–$3,000. Use software like EagleView (satellite-based measurement at $15–$30 per report) or AppliCad Roof Wizard for accurate exterior measurements without climbing ladders. These tools measure wall areas, window openings, and trim lengths from aerial imagery. Alternatively, use a laser distance measurer from the ground and scale your measurements.
House Wrap, Sheathing, and Prep Work
Siding replacement is an opportunity to inspect and upgrade the weather barrier behind the siding. House wrap (Tyvek, ZIP System, or CertainTeed CertaWrap) should be installed over the sheathing at $0.50–$1.50 per sq ft. If the existing house wrap is in good condition, it may be left in place, but budget for replacement on older homes. Sheathing inspection is critical during removal of old siding. OSB or plywood sheathing in good condition can be left. Damaged or rotted sheathing must be replaced at $2–$4 per sq ft for materials and labor. On older homes, you may find no sheathing (just insulation or nothing between studs and siding) — adding sheathing before new siding costs $3–$5 per sq ft but significantly improves the home structure and energy performance. Foam board insulation (Owens Corning Foamular, Dow Thermax) at $1–$3 per sq ft installed can be added between the house wrap and siding for additional R-value. This is especially valuable when siding is already being replaced — the incremental cost is lower than a separate insulation project. Old siding removal costs $1–$3 per sq ft. Asbestos siding (common on pre-1970 homes) requires licensed abatement at $5–$15 per sq ft — test before demolition.
Trim, Soffit, Fascia, and Detail Work
Trim work often determines whether a siding job looks professional or amateur. PVC trim (Azek, Royal, Versatex) costs $2–$5 per linear foot and never rots or requires painting — it is the best choice for window casings, corner boards, and frieze boards. Fiber cement trim (James Hardie) costs $1.50–$4 per linear foot and matches HardiePlank siding perfectly. Wood trim (cedar, pine with primer) costs $1–$4 per linear foot but requires maintenance. Aluminum soffit ($3–$6 per sq ft installed) ventilates the attic and provides a maintenance-free underside to eave overhangs. Vented soffit panels are essential for proper attic ventilation — never install solid soffit unless compensated by adequate ridge or gable venting. Aluminum or PVC fascia ($3–$5 per linear foot installed) covers the fascia board and integrates with the gutter system. Gutter removal and reinstallation should be included in siding estimates at $3–$5 per linear foot if existing gutters are in the work area. Light fixtures, outlets, hose bibs, and other penetrations need extending or re-flashing — budget $50–$200 per penetration. All detail work should be itemized in your estimate to prevent scope disputes.
Pricing Strategy and Winning Proposals
Siding projects should target 35–45% gross margin. Establish contractor accounts with siding distributors (ABC Supply, Allied Building Products, Beacon) for 20–40% below retail pricing. Buy materials on account and have them delivered to the job site — this saves time and your crew can start immediately. Present pricing as a per-square-foot installed price or a total project price — do not break out materials and labor separately. Tiered proposals work well: Good (vinyl siding at $8–$12/sq ft installed), Better (insulated vinyl or LP SmartSide at $10–$15/sq ft installed), Best (James Hardie fiber cement at $13–$18/sq ft installed). Include photos of completed projects in each material. Bundle siding with window replacement for a whole-house exterior package — this increases project value by 40–60% and gives the client a cohesive result. Your proposal should specify: siding brand and profile, color selection, house wrap brand, trim material and locations, soffit and fascia scope, old siding removal method, warranty terms, and timeline. Payment: 30% deposit for material procurement, 30% at siding installation start, 30% at completion, 10% at final walkthrough.
Frequently Asked Questions
Siding replacement costs $5–$15/sq ft installed for vinyl, $8–$15 for LP SmartSide, $9–$16 for James Hardie fiber cement, and $8–$20 for natural wood. A typical 2,000 sq ft home with 1,500 sq ft of siding area runs $8,000–$25,000 installed. Include trim, soffit, fascia, and house wrap in the total. High-end projects with stone accents and premium trim reach $30,000–$50,000.
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