Hardie board siding material prices in 2025–2026 typically fall between $1.10 and $3.20 per square foot. That is material only. A working planning number for a standard primed lap board is $1.30–$2.00 per square foot; a factory-painted board usually runs $1.80–$2.80 per square foot. If a supplier quote shows $4.50 or $5.00 per square foot, it is usually an installed number or it includes a large trim and accessory allowance.

The square-foot price covers the siding boards themselves, not the wall. For lap siding, material cost is usually converted from board price to coverage area using the installed exposure minus overlap. A 12-ft board priced at $18.00 does not mean $1.50 per square foot of wall; the coverage depends on the installed reveal. That conversion is where quotes become difficult to compare.

What the price per square foot covers

On a supplier quote, “per square foot” can mean three different things: board surface area, installed wall area, or a blended package that includes trim. Ask which one you are looking at.

A board-only quote covers the plank or panel only. It usually excludes starter strips, flashing, trim boards, fasteners, and sealant. A line-item material package covers all of those pieces and is the more useful number for budgeting. When I quote a material package, I calculate board coverage by wall area, add 8–12% waste, and separate trim by linear foot. That avoids hiding the expensive parts in a low square-foot number.

Thickness and profile: where the material price moves

Thickness changes stiffness, cutting time, and fastener requirements. Most HardiePlank lap siding is 5/16 in. thick. Panel products are typically 7/16 in. thick, and trim boards are commonly 5/8 in. to 3/4 in. thick. In a supplier price sheet, a 7/16 in. panel will cost more per square foot than a 5/16 in. plank because it contains more fiber cement per covered square.

Profile changes price less than thickness, but it still matters. Commodity profiles such as smooth and cedar-grain lap boards are usually the cheapest because they are produced at high volume. Beaded, shiplap, and deeper wood-look profiles can add $0.15–$0.50 per square foot depending on the market. The profile also changes the recommended exposure and trim details, which changes the number of boards you actually buy.

2025–2026 material-only price table

Product	Thickness	Finish	Material range per sq ft of wall coverage
HardiePlank lap siding, smooth or cedarmill	5/16 in.	Primed	$1.10–$1.50
HardiePlank lap siding, smooth or cedarmill	5/16 in.	Factory painted	$1.60–$2.30
HardiePlank lap siding, beaded or colonial	5/16 in.	Primed	$1.30–$1.80
HardiePanel vertical siding	7/16 in.	Primed	$1.00–$1.40
HardiePanel vertical siding	7/16 in.	Factory painted	$1.50–$2.10

Ranges are for planning only and reflect typical supplier or big-box quotes without trim, waste, freight, or installed labor.

How to read a supplier quote line by line

Look for units: square feet, linear feet, each, or box. If every line is converted to square feet, you cannot tell whether the supplier is counting wall coverage or board surface. A written quote should list board count, length, thickness, profile, finish, and color lot.

Check the waste factor. A proper material order adds waste for cuts, damaged boards, and field mistakes. On a simple gable wall, 8–10% waste is normal. On a wall with windows, porches, or complex corners, 12–15% is not unusual. If a quote has zero waste, it will likely come back with a change order.

Line items should include:

• Lap siding boards — itemized by length and finish
• Trim boards — sold by linear foot, not square foot
• Starter strip — sometimes missed, but required for the first course
• Joint flashing — behind butt joints; cheap by the piece, expensive if missing
• Sealant and fasteners — should be a small line, not a mystery fee
• Delivery or freight — separated, not folded into board price

What a complete material package looks like

Line item	Unit	Typical planning range	What to check
8.25 in. HardiePlank lap siding, cedarmill, primed	sq ft of coverage	$1.20–$1.60	Length, lot number, exposure
Factory finish upcharge	sq ft	$0.40–$0.80	Finish warranty, color batch
Starter strip / starter course	10 ft	$3–$8	Material type, included or separate
Joint flashing	10 ft	$2–$5	Width, UV rating
5/8 in. corner trim, primed	linear ft	$2.50–$5.00	Primed vs painted, length
Sealant	10 oz tube	$4–$10	Exterior polyurethane, not acrylic caulk
Corrosion-resistant fasteners	1,000 ct	$35–$70	Ring-shank nails or approved screws

A trim-heavy wall can add $0.40–$0.70 per square foot to the board-only price. A simple rectangular wall with few corners stays at the lower end.

Primed vs. factory-painted: what you are buying

Primed boards are cheaper at the window, but they require field priming after cutting and paint on site. Factory-painted boards have a cured finish applied under controlled conditions. The paint line is more consistent than most field paint, and the finish comes with a longer warranty. The material upcharge is not just paint; it is the value of not scheduling a painter around the siding crew.

Factory finish costs more up front and less over the repaint cycle. If you are comparing quotes, do not compare a primed board to a factory-painted board at the same square-foot price. A $0.50 per square foot upcharge on factory finish can be cheaper than field painting once labor, staging, and two coats are included.

Trim and accessories hide outside the square-foot number

Corner trim, window surround, column wrap, fascia, and soffit are sold by the linear foot. They do not convert cleanly into wall square footage. A 1,500 sq ft wall area with four corners might need 40–60 linear feet of corner trim at $2.50–$5.00 per linear foot. That is $100–$300 before waste.

Homes with stone or stucco accents, multiple gables, or steep soffits often have accessory costs that exceed the board cost. When reading a supplier quote, separate “board area” from “trim package.” If the supplier folds trim into the square-foot price, ask for the backup line items.

What to ask for in a supplier quote

Ask for the board count, not just a square-foot total. Ask for thickness, width, profile, finish, color lot, and exposure. If the quote is itemized, you can compare one supplier against another without guessing what the other included.

Ask these questions before you put money down:

• Is the price board-only or complete material package?
• What waste factor is built into the board count?
• Are trim, starter strip, joint flashing, sealant, and fasteners separate?
• Is freight included, or will it appear on the final invoice?
• Is the finish factory-painted or field-painted?

Verdict: the price point that makes sense for most homes

If you are buying material only for a standard lap-sided home, plan for $1.30–$2.00 per square foot for a primed HardiePlank package and $1.80–$2.80 per square foot for factory-painted boards, plus trim and accessory line items. Do not commit to a quote that only shows a square-foot total. The supplier who appears 20% cheaper is often the supplier who left out trim, waste, or freight.

For most US homeowners, the best value is a factory-painted cedarmill or smooth lap board with an itemized trim package, not the cheapest primed board on a per-square-foot line. The material cost is only one part of the wall; missed flashing or the wrong thickness costs more than the upcharge.

How we estimated these figures

These ranges come from 2025–2026 planning data from US supplier quotes, big-box list prices, and contractor material invoices. They represent common US suburban and mid-market pricing, not coastal metro or remote rural freight conditions. We did not use a named survey or a fixed national database.

We converted board pricing to wall coverage using standard lap exposures and added a waste allowance of 8–12%. Trim pricing is shown by linear foot because that is how suppliers sell it. All figures are planning estimates, not installed costs. Labor, insurance, equipment, scaffolding, removal, and permit fees are excluded.

What this guide does not cover

This guide does not cover installed cost per square foot, which typically adds $2.00–$5.00 or more per square foot depending on region, wall condition, crew, and access. It does not cover tear-off and disposal pricing, insulation, WRB, or vapor barrier replacement. It also does not cover specialty Hardie products such as soffit panels, architectural panels, or simulated shingle panels beyond product family references.

Paint and finish durability are covered only as material selection factors, not as warranty advice. Color availability, regional stock, and freight surcharges vary too much to fold into a simple square-foot range. For a firm number, get three written supplier or contractor quotes on the same wall area and trim schedule.

FAQ

Is Hardie board sold by square foot or by board?

Suppliers usually sell boards by the piece and quote by square foot for comparison. The correct comparison uses installed wall coverage, not board face area. A 12-ft board with a 7-in. exposure covers 7 sq ft per board. Confirm the exposure and waste factor before comparing two quotes by square foot.

Does the square-foot price include waste?

It should, but many low quotes do not. Proper lap siding waste runs 8–12% on simple walls and 12–15% on complex walls. If waste is missing, the order will come up short after cuts and damage. Ask for the board count and the waste percentage in writing.

What is the difference between primed and factory-painted Hardie board?

Primed board is ready for field paint after installation. Factory-painted board has a cured finish applied before it ships, usually with a longer finish warranty. Factory paint costs more per square foot up front but removes field painting labor and can reduce the effective repaint cycle on the wall.

Can I buy Hardie board without a contractor and install it myself?

Yes, you can purchase from lumberyards or building supply houses. The product is heavy and brittle, so proper handling, cutting, and flashing matter. A DIY material package should still include starter strip, joint flashing, trim, sealant, and approved fasteners. Missing any of these creates early failure.

Is thicker Hardie board always better?

Not necessarily. Thicker panels and trim cost more and add weight, but the specified thickness follows the application. Lap siding, vertical panels, soffit, and trim each have a standard product thickness. Buy the product thickness required for the wall detail, not the thickest board available.

Planning estimates only. These pricing ranges are based on 2025–2026 US supplier data and common installation assumptions. Material prices vary by region, freight, color, and stock. Verify all quotes by thickness, profile, finish, waste allowance, and line item before purchase. This article does not replace a written quote or product-specific installation instructions from James Hardie or your supplier.