How to Estimate Siding Replacement: Vinyl, Fiber Cement, and Wood Material and Labor Costs

Siding is priced in squares (one square = 100 square feet of coverage). A 2,000 sqft house typically has 1,800-2,200 sqft of siding surface depending on geometry, so 18-22 squares. Material costs per square in 2026: vinyl $180-320, fiber cement (James Hardie) $300-500, engineered wood (LP SmartSide) $280-450, cedar $600-900. Labor per square runs 3-4 hours for vinyl, 5-7 hours for fiber cement (heavier, requires special cutting), 6-8 hours for wood. Total installed cost per square typically lands at $500-800 for vinyl, $900-1,400 for fiber cement, $1,100-1,800 for cedar. Add tear-off ($80-150/square), disposal, sheathing repair ($2-5/sqft where needed), and a complete trim package ($1,500-4,000 for a typical house). A standard single-story 1,800 sqft house in vinyl runs $10,000-18,000 installed; the same house in HardiePlank runs $18,000-28,000; cedar runs $25,000-40,000. Always bid with 10-15% contingency for sheathing surprises discovered at tear-off.

Measure each wall elevation separately and calculate the gross rectangular area. Then subtract openings (windows, doors, non-siding features) to get net siding area. For a simple gable-end wall: height × width for the rectangular portion, plus ½ × base × height for the gable triangle. For a hip roof, the upper sections are trapezoids or triangles that require the appropriate geometric formulas. Don't subtract small windows (under 10 sqft) from the gross area — the waste from cutting around them negates the savings. Subtract only doors and large fixed windows (picture windows, bay windows). Most estimators simply compute the full wall rectangles without any subtraction and let the 10% waste factor cover it. Add waste: 10% for rectangular walls with few cuts, 15% for complex walls with many windows or architectural features, up to 20% for heavily gabled or dormered houses. Fiber cement has more waste than vinyl because cut pieces can't be overlapped as flexibly. Common measurements: a typical two-story 2,000 sqft house has 20-25 squares of siding. A single-story ranch has 15-22 squares. A large two-story colonial can have 30-40 squares. Use Google Earth measurement tools or a laser distance meter to confirm dimensions before finalizing the takeoff. The takeoff is the single most important part of the estimate. An undermeasured job kills profit; an overmeasured job kills the bid. Spend real time here — walk the house, sketch elevations, double-check the math.

Vinyl is the most common siding in the U.S. — about 27% market share. It's lightweight, easy to install, low maintenance, and the cheapest major category. Material pricing tiers (per square, 2026): - Builder-grade vinyl (0.040" thickness): $180-240 - Mid-grade (0.044-0.046"): $240-300 - Premium (0.046"+, insulated, thick lap): $300-450 J-channel, corner posts, utility trim, and starter strips add roughly 10-15% to the base material cost. For a 20-square house, total trim package runs $400-800. Labor: 3-4 hours per square for a two-person experienced crew. A 20-square vinyl job takes 60-80 labor hours, or roughly 4-5 days for a two-person crew including tear-off. At $55-75/hour fully loaded labor rate, that's $3,300-6,000 in labor for the siding install. Tear-off: vinyl comes off quickly — roughly 1 hour per square for two workers. Dumpster for an average job runs $350-500 (a 20-yard dumpster). Some municipalities require vinyl to be recycled at specific facilities; others allow it in mixed C&D waste. Common upgrades: insulated vinyl adds $80-150/square, improves R-value from R-0 (standard vinyl is a veneer) to R-3 to R-4. Good for mid-Atlantic and colder climates where the envelope upgrade pays back. Board-and-batten vinyl, shake panels, and scallop panels run 30-50% more than standard horizontal lap. What goes wrong: old vinyl houses often have failing sheathing or moisture damage hidden under the old siding. Build 10-15% contingency for plywood/OSB replacement discovered at tear-off. Warrant your work to exclude pre-existing sheathing damage in writing.

James Hardie dominates the fiber cement category (roughly 80% market share in North America). LP SmartSide, Allura, and Nichiha are alternatives. Fiber cement is heavier, harder, more durable, and more expensive to install than vinyl. Material pricing tiers (per square): - HardiePlank Lap Siding (prefinished ColorPlus): $350-500 - HardiePlank unprimed or primed (field-finished): $280-380 - Hardie Panel (sheets for modern/board-and-batten): $320-450 - Hardie Shingle Siding: $450-650 Trim: Hardie trim runs $3-5/linear foot. A typical house uses 300-500 linear feet of trim — budget $1,500-3,000 for the complete trim package. Labor: 5-7 hours per square. Fiber cement is heavy (2.5× the weight of vinyl), requires specific tools (fiber cement shears or a diamond blade circular saw), and requires two workers to handle planks over 12 feet. Silica dust from cutting requires OSHA-compliant dust control — a HEPA-filter vacuum attachment or wet cutting is required. This slows installation vs vinyl. Tear-off: slightly slower than vinyl because the planks are heavier and often nailed more aggressively. Budget 1.2-1.5 hours/square for tear-off plus disposal. Fiber cement is inert and goes in standard C&D waste. Installation requirements: James Hardie publishes specific installation requirements that must be followed to maintain the warranty (ColorPlus 15-year finish warranty, 30-year substrate warranty). Key requirements: stainless steel or hot-dipped galvanized nails, 3/8" gap at corners and openings, butt joints only over solid framing or flashed joints, specific blind-nail or face-nail patterns. Failing to follow installation guidelines voids the warranty — important to document compliance. Paint: if field-finishing, budget $1.50-2.50/sqft for primer and two coats of quality exterior paint. Prefinished (ColorPlus) adds roughly 20% to the material cost but eliminates field painting.

Traditional wood siding (cedar, redwood) is the premium appearance but the most maintenance-intensive option. Engineered wood (LP SmartSide) offers a similar look at 40-50% of the cost with better dimensional stability. Cedar clapboard (6" exposure): - Material: $600-900/square (prefinished adds 30-50%) - Labor: 6-8 hrs/square - Installed cost: $1,200-2,000/square - Maintenance: refinish/stain every 5-8 years Cedar shake/shingle: - Material: $800-1,400/square (hand-split shakes top of range) - Labor: 8-12 hrs/square (slow, individual pieces) - Installed cost: $1,800-3,200/square - Used primarily on gables, dormers, or feature walls LP SmartSide (engineered wood): - Material: $280-450/square for lap; $380-550 for panel - Labor: 5-6 hrs/square (similar to fiber cement) - Installed cost: $900-1,400/square - 50-year limited warranty, requires specific installation details Redwood: less common now due to sustainability concerns and limited supply. Where available, prices are similar to premium cedar or 20% higher. What customers want to know: the "real wood vs engineered" question. LP SmartSide looks nearly identical to wood after install but is dimensionally stable (doesn't warp, crack, or split the same way) and costs 40-50% less. For most customers, engineered wood is the rational choice. Cedar is for architecturally specific applications, historic restorations, and customers who specifically want the authentic wood patina. Disclaimer: This content is for educational purposes only and does not constitute legal or professional advice. Always verify local code requirements, permit needs, and manufacturer installation specifications for your specific job.

The siding itself is usually only 60-70% of total project cost. Trim, flashing, accessories, and prep work make up the rest — and missed line items are where contractors lose money. Standard line items to include: - Corner trim (4" or 5" boards at outside corners): $5-12/linear foot - Window and door trim: $4-10/linear foot - Soffit and fascia (if replacing): $8-15/linear foot - Frieze board and water table: $6-12/linear foot - J-channel, starter strips, F-channels (vinyl): included in trim allowance above - Butt joints and seam flashing: $2-5/linear foot - Caulking and sealant: $150-400/house - House wrap (Tyvek/Typar) if specified: $0.30-0.60/sqft - Insulation upgrade (rigid foam 1" polyiso): $1-2/sqft - Sheathing repair (allowance): $300-1,500 contingency - Tear-off and disposal: $80-150/square + dumpster fee - Permit (varies by jurisdiction): $100-500 - Painting (if field-finishing): $1.50-2.50/sqft Commonly missed: flashing at window and door heads, kickout flashing at roof-to-wall transitions, ice and water shield at penetrations in cold climates, radon/vapor barrier work. These are code-required in many jurisdictions and essential to prevent water damage. Accessory hardware: vents (soffit vents, gable vents, dryer vents), shutters, light fixtures, hose bibs, address numbers, mailbox. List each as a labor line item — removing and reinstalling all of these on a typical house adds 4-8 labor hours.

Project: tear-off and replace 20 squares of vinyl siding on a two-story colonial. Material: - Vinyl siding, mid-grade 0.044": 22 squares (incl. 10% waste) × $260 = $5,720 - Trim and accessories (J-channel, corner posts, utility trim): $600 - Caulk, screws, nails, housewrap patch: $350 - Subtotal materials: $6,670 Labor (2-person crew, $70/hr fully loaded): - Tear-off 20 squares × 1 hr = 20 hrs × $70 = $1,400 - Install 20 squares × 3.5 hrs = 70 hrs × $70 = $4,900 - Trim, detailing, accessories remount = 8 hrs × $70 = $560 - Subtotal labor: $6,860 Other costs: - Dumpster 20-yard: $450 - Permit: $200 - Sheathing repair contingency: $500 (if not used, reduce final invoice or keep as profit buffer) - Subtotal other: $1,150 Direct cost total: $14,680 Overhead (15%): $2,202 Profit target (20% of direct + overhead): $3,376 Customer price: $20,258 → round to $20,000 or $20,500 Price per square installed: $20,000 / 20 = $1,000/square — consistent with market range of $500-800/square + trim and overhead. Makes sense for a mid-grade vinyl job with full tear-off. Compare to alternative: same project in HardiePlank ColorPlus. Material runs $10,000-12,000 (vs $5,720 vinyl), labor runs 50% more ($10,000 vs $6,860). Total customer price lands around $32,000-36,000 — a meaningful jump that justifies selling the upgrade only when the customer cares about the appearance and longevity trade-off.