Every siding conversation eventually lands on hardie plank cost per square foot, and most per-square-foot numbers quoted online are useless because they never say what is inside the foot. Materials only? Installed? With trim and removal, or without? Our hardie plank cost calculator prices every line separately, and this post gives the per-square-foot table the way it should be read: as a set of lines, each with its own range, that add up to the all-in figure, so you can audit any quote against it.
The Lines Inside the Per-Square-Foot Figure
The materials line is the easiest to quote and the easiest to misuse. Lap materials run $2.50 to $5.00 per square foot, panel $3.00 to $6.00, and shingle $4.00 to $7.00, all before the 10 percent waste the calculator adds for cuts around openings and corners. Labor runs $4.00 to $8.00 per square foot, with two-story work about 12 percent higher, because fiber cement is heavy, cutting needs dust control, and height slows every course. Finish adds $1.50 to $2.50 per square foot for primed plus site paint, or $2.50 to $4.00 for ColorPlus prefinished. Trim adds $0.50 to $1.00 for a basic package or $1.50 to $3.00 for an upgraded package. Removal adds $1.00 to $2.00 per square foot where the old siding comes off. Add the lines you actually need, and only those lines, and you have a per-square-foot figure that means something.
| Cost line | Per sq ft | Notes |
|---|---|---|
| Materials, lap (incl. waste) | $2.75 to $5.50 | Rate $2.50 to $5.00 times 1.10 waste |
| Labor, one story | $4.00 to $8.00 | Two stories about 12% higher |
| Finish, primed + paint | $1.50 to $2.50 | ColorPlus $2.50 to $4.00 instead |
| Trim, basic package | $0.50 to $1.00 | Upgraded $1.50 to $3.00 instead |
| Removal and disposal | $1.00 to $2.00 | Only where old siding comes off |
Three All-In Per-Square-Foot Figures, Explained
At the calculator default, a 2,700 square foot two-story lap job, primed, basic trim, with removal, in Waukegan, runs $11 to $22 per square foot all-in. A smaller one-story panel job, ColorPlus, upgraded trim, no removal, runs $12 to $23 per square foot: higher per foot, lower in total, because the premium finish and trim spread across a smaller wall. A large two-story shingle job, primed, basic trim, with removal, runs $13 to $24 per square foot: the highest per foot, because shingle labor dominates. Notice what the table teaches: per-square-foot figures fall as houses get larger and simpler, and rise as houses get smaller, taller, or more detailed. A small house will always cost more per foot than a large house, and that is not overcharging, it is mobilization, setup, and trim spread across fewer feet.
Wall Area, Not Floor Area
The most common per-square-foot mistake is dividing by the wrong area. Siding is priced per square foot of wall, not per square foot of floor. A 2,000 square foot two-story house has roughly 2,700 square feet of wall in the calculator default, because two stories stack wall area over a smaller footprint, while a 2,000 square foot one-story ranch has less wall area than its floor area suggests once the footprint is accounted for. Dividing a siding total by floor area therefore understates the per-square-foot figure on a two-story home and overstates it on a ranch, and comparing two such figures tells you nothing. Always ask which area a per-square-foot quote divides by, and if the answer is floor area, ask for the wall area instead.
How to Audit a Quote With This Table
Running Your Own Numbers in Two Minutes
The fastest way to use this table is to run your own house through the hardie plank cost calculator with your real inputs, then divide each resulting line by your wall area and compare it to the table above. If your materials line divides below the lap range, ask whether waste is included. If your labor line divides below the labor range, ask whether two-story scaffolding is included. If your finish line is zero on a primed job, ask where site painting is priced. Two minutes with the calculator turns a table of averages into a personal audit, and a contractor who welcomes that audit is usually the contractor worth hiring.
Take any quote, divide each line by your wall area, and compare the result to the table above, line by line. A materials line below $2.50 per square foot for lap suggests a thinner product or a missing waste allowance. A labor line below $4.00 per square foot suggests a crew that is either very fast or skipping flashing and fastening steps. A finish line of zero on a primed job means site painting is missing and will arrive as a change order. A trim line of zero on a house with many windows means trim is either excluded or buried in another line, and either way it should be named. The table does not tell you which contractor to hire, but it tells you which questions to ask, and a contractor who answers them line by line is the one worth hiring.
Related reading: our hardie plank cost calculator, plus Hardie Plank Siding Cost and Hardie Plank Colors and Styles. Every tool is in the roofing calculators hub.
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Frequently Asked Questions
What is the average Hardie Plank cost per square foot installed?
Guides put installed fiber cement at $6 to $15 per square foot. At the calculator default, a two-story lap job in Waukegan runs $11 to $22 per square foot all-in, with materials, labor, finish, trim, and removal all included. A final quote is confirmed only after an on-site inspection.
Is cost per square foot based on wall area or floor area?
Wall area. Siding covers walls, so the price divides by square feet of wall. A 2,000 square foot two-story house has roughly 2,700 square feet of wall, so dividing by floor area understates the true per-square-foot figure.
Why does a small house cost more per square foot?
Because mobilization, setup, scaffolding, and trim spread across fewer square feet. A small house costs less in total but more per foot, and a large house costs more in total but less per foot. That is normal, not overcharging.
What is included in the all-in per-square-foot figure?
In this calculator: materials including 10% waste, labor, finish, trim package, and removal where selected, with the Chicago-area region factor where it applies. Sheathing repair and structural repair are excluded and should be priced per sheet.
How do I compare two per-square-foot quotes?
Compare line by line on the same wall area and the same specification: same product, same finish, same trim package, same removal scope. A single blended per-square-foot number without those lines cannot be compared honestly.
Zayn Robert is a content specialist focused on roofing, construction, and home improvement topics. He creates easy-to-understand guides that help homeowners learn about roof measurements, materials, maintenance, and repair decisions. His work combines detailed research with practical insights from roofing professionals at Zuniga Roofing Inc.