Pricing and estimating

How to price siding jobs

Price siding by the square (100 square feet of wall), add waste and trim by the linear foot, price labor by material type and wall height, then add overhead and profit on top of direct cost.

A project engineer in a hardhat and safety vest uses a rugged tablet beside steel wall framing.
Capture field information where the work happens, then route it to the people who need it. AI-generated illustration.

To price a siding job, measure the net wall area in squares (one square covers 100 square feet), add a waste allowance, price trim, corners, J-channel, soffit, and fascia by the linear foot, then add labor for tear-off, wrap, and install based on the siding material and how high the walls go. Add disposal, permits, and equipment. That is direct cost. Overhead and profit go on top, and they should be set from your own books, not copied from a competitor's yard sign.

Siding is easy to underprice because the wall area looks simple and the trim does not. A plain ranch with two gables and a modern two-story with box bays, a walkout basement, and twelve windows can have similar square footage and very different costs.

Pricing methods siding contractors use

  • Price per square. The common way to quote vinyl, fiber cement, and engineered wood lap siding. It works when the per-square number covers only the field siding and everything else is priced separately.
  • Line-item estimate. Siding, house wrap, starter, outside and inside corners, J-channel, window and door trim, soffit, fascia wrap, and labor each on their own line. Insurance work and larger jobs usually go this way.
  • Linear foot pricing for trim and accessories. Corners, J-channel, frieze, fascia, and soffit are counted in linear feet. On trim-heavy homes, these lines can rival the field siding.
  • Unit prices for openings and add-ons. A set price per window or door to trim out, per mounting block, per light fixture box, and per sheet of rotted sheathing replaced.
  • Time and materials for repairs. Storm patches and small sections where matching and access are uncertain. See time and materials.

Step by step: building a siding number

  1. Measure walls. Get gross wall area per elevation, including gable triangles. Many contractors order an exterior measurement report. As one published example, Hover's pay-per-project Starter tier lists exterior reports (roof, siding, gutters, windows) at $59, $99, or $139 depending on complexity, checked October 2026.
  2. Subtract openings with judgment. Large openings like garage doors and patio sliders come out. Many contractors leave small windows in the area count, since the cuts around them create waste anyway. Pick one rule and use it on every bid.
  3. Add waste. Simple walls waste less than walls broken up by gables, bays, and dormers. Set your own percentages by house type from what you actually haul away and return.
  4. Count trim. Outside corners by height, inside corners, J-channel around each opening, starter along the bottom, and finish trim under soffits. Soffit and fascia go by the linear foot of eave.
  5. Price labor by material and height. Fiber cement is heavier and slower to cut and handle than vinyl. Third-story walls need staging or lifts. Tear-off of old wood or aluminum adds time, and so does sheathing repair.
  6. Add job costs. Dumpster, permit, lift or pump jack rental, delivery, and fall protection setup. Walls 6 feet or more above a lower level trigger OSHA fall protection requirements in residential construction.
  7. Add overhead and profit. Use a rate you calculated, as covered in how to calculate construction overhead rate.

Worked example: a two-story vinyl re-side

This is a made-up example to show the math. The prices are placeholders, not market rates. Use your own supplier quotes and crew numbers.

Say a two-story colonial has 2,400 square feet of net wall area, or 24 squares. Two gables and a bump-out push you to a 12 percent waste factor, so you order about 26.9 squares and round up to 27. Old aluminum comes off first, and the homeowner wants new soffit and fascia wrap.

Example siding estimate (placeholder prices)
LineQuantityUnit costTotal
Vinyl siding, wrap, starter27 squares$165 per square$4,455
Corners, J-channel, trimLot$1,150$1,150
Soffit and fascia material160 linear feet$9 per foot$1,440
Labor: tear-off, wrap, install24 squares$140 per square$3,360
Labor: soffit and fascia160 linear feet$6 per foot$960
Window and door trim-outs14 openings$45 each$630
Dumpster, permit, staging1$900$900
Direct cost$12,895
Overhead at 20% of direct cost$2,579
Cost including overhead$15,474
Sell price at 15% net margin ($15,474 / 0.85)$18,205

That is about $759 per square of wall on this house, all in. Notice that trim, soffit, and openings add up to roughly a third of direct cost. A flat per-square price that ignores them would lose money on this colonial and overcharge a plain ranch. Switch the same house to fiber cement and the material line, the labor rate, and the silica controls all change, so build a separate rate table for each product line.

Overhead, labor burden, and margin

The labor rates in your estimate should be burdened costs: wage plus payroll taxes, workers' compensation, and benefits. If you pay crews by the square, the piece rate still carries burden when the installers are employees. Work it out with how to calculate labor burden.

Overhead is the cost of keeping the doors open: office staff, sales commissions, trucks, insurance, software, and the owner's salary. Spread it as a percentage of direct cost or per crew day. Then set profit as a margin on the sell price and know how it differs from markup. A 20 percent markup is not a 20 percent margin. See markup vs margin in construction.

What changes the price on a siding job

  • Material. Vinyl, fiber cement, engineered wood, and metal each carry different material cost, cut time, and accessory systems.
  • Silica control on fiber cement. OSHA's silica standard lists handheld saws for cutting fiber-cement board with a dust collection system for outdoor work. Budget for the right saw and vacuum and the time to use them.
  • Lead-safe work on older homes. Removing or cutting through painted siding or trim on homes built before 1978 falls under EPA's Renovation, Repair and Painting rule. Certified firm status, containment, and cleanup add cost.
  • Height and access. Third-story gables, walkout basements, and steep grades need staging or lifts.
  • Hidden damage. Rotted sheathing or rim joists show up after tear-off. Put a unit price per sheet in the contract so it becomes a priced change order instead of an argument.
  • Color matching on repairs. Discontinued profiles or colors can turn a small patch into a full elevation.

Check the price after the job

Pricing gets better only when you compare the estimate with what actually happened. After each re-side, look at squares ordered versus used, crew hours per square by material, trim waste, and dumpster weight. If fiber cement jobs keep running 15 percent over on labor, raise the fiber cement labor rate. Smart Business Automator tracks estimated versus actual cost on every job, so that check happens from the job record instead of a separate spreadsheet. For more on the habit, see job costing and how to set prices that protect margin.

Frequently asked questions

How do siding contractors measure a house?

Most measure each wall elevation, including gable triangles, then subtract large openings. Many order an exterior measurement report from a photo or aerial service to save time and catch details like soffit and trim lengths.

What is a square in siding?

A square is 100 square feet of wall coverage. A house with 2,400 square feet of net wall area needs 24 squares before waste.

Should trim be included in the per-square price?

It is safer to price trim, corners, J-channel, soffit, and fascia separately by the linear foot. Trim varies a lot from house to house, and folding it into one per-square rate overcharges simple homes and undercharges complex ones.

Does fiber cement cost more to install than vinyl?

Usually yes. It is heavier, slower to cut, and cutting it creates silica dust, which OSHA's silica standard addresses with dust-collecting saws for outdoor cutting. Price labor and equipment separately for each material.

How do I handle rotted sheathing found after tear-off?

Put a unit price per sheet in the contract and photograph the damage before replacing it. That turns hidden damage into a documented, priced change instead of a dispute.

Sources

  1. Hover: pricing
  2. 29 CFR 1926.1153, Respirable crystalline silica (Cornell LII)
  3. U.S. EPA: Lead Renovation, Repair and Painting Program
  4. 29 CFR 1926.501, Duty to have fall protection (Cornell LII)
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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