What Does Siding Replacement Cost in Seattle?
Real 2026 installed pricing for King and Snohomish County homes. No salesman calls, no high-pressure quotes — just the actual numbers we use to write written, line-itemized estimates. Use the calculator below to ballpark your project, then book a free on-site assessment for an exact quote.
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Fixed-Price QuotesWhat Homeowners Say
Real reviews from our Google profile — unedited, from real projects.
“We recently had Paul with GP General repair a damaged corner protector and sidings. His estimate was reasonable, his availability was timely, and his job was excellent. Our home hadn’t been re-painted in a while and the paint had considerably faded, yet he was able to match the color perfectly. Now we know who to turn to when in need of another repair work.”
“GP General replaced LP siding on our garage. Paul was very thorough when he came out to do the estimate; he listened to my concerns and was able to work out solutions on the spot. His crew did a great job and were very courteous. They also were careful about cleaning up (I didn’t find any nails!). Really happy with the job and can recommend GP General.”
“I highly recommend GP General Corp for siding replacement. We recently had our wood siding replaced with James Hardie lap siding, and Paul and his team did an excellent job.”
Want the always-current rate table? See our pricing page — this guide goes deeper on what moves a real quote up or down.
Installed Cost Per Square Foot of Wall Area
Wall area is what we price — not the home’s interior square footage. A 2,200 sq ft Seattle two-story home typically has 3,000–3,800 sq ft of exterior wall to clad. Multiply by the per-sf range below to ballpark the project.
These are day-one numbers — the 10- and 20-year maintenance math by material is here.
Trying to decide between materials? See our honest Hardie vs Cedar vs LP vs Metal comparison → · Fiber cement deep-dive → · ColorPlus colors →
Important: these ranges include the install — tear-off, dumpster, new HydroGap drainable WRB, ventilated rainscreen furring, fasteners, flashings, and the cladding itself. They do not include permits, substrate repair, or trim/fascia/soffit (which typically adds 12–18%).
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Ballpark Your Seattle Siding Project
Quick estimate based on real 2026 Seattle installed pricing. Not a binding quote — book a free assessment for the exact number.
5 Things That Change Your Siding Quote
Two homes the same square footage can quote $20,000 apart. Here’s why.
A 2,200 sq ft single-story rambler has less wall area than a 1,800 sq ft two-story. We price by wall sq ft, not by what’s on the listing.
Two-story homes add ~15% for scaffolding and slower install pace. Three-plus stories or steep grade access can add 25–30%. A flat one-story with truck access is the cheapest possible siding job.
Replacing siding without addressing trim leaves a visual mismatch and water-entry points. We typically include trim/fascia/soffit at +12–18% of the siding total. Skipping it saves money up front, costs paint and patching every 3–5 years after.
If we pull off the old siding and find rotted sheathing, failed flashing, or no WRB, we document it with photos, give you a written change order, and you decide. Typical substrate repair runs $2–$4/sf of affected area. Most Seattle homes need at least some dry rot repair — we always plan a contingency.
Most full re-sides in Seattle trigger an SDCI permit ($300–$900 depending on scope). Outside Seattle, Bellevue, Kirkland, Redmond, Mercer Island, Edmonds, and Everett each have their own building department fees. We pull the permit on your behalf and coordinate inspections.
Within Hardie alone: HardiePlank Lap is $14–$20/sf, Hardie Artisan thick-lap is $20–$26/sf, ColorPlus pre-finished is +$2–$4/sf vs primed-and-painted. The right choice depends on exposure, design, and how often you want to repaint.
The $9/sq ft Quote Is Almost Always Missing Line Items
If one bid is dramatically cheaper than the others, the price isn’t magic — the bid is missing things. Here’s where the gap usually lives.
A common shortcut: re-use the old house wrap. By the time siding is failing, the WRB behind it is usually torn, sun-degraded, or installed without the right shingle laps. Skipping a new WRB saves the contractor $1–$2/sf and costs you a 5-year teardown instead of a 30-year wall.
A 3/8″ furring strip behind the siding is the difference between a wall that dries and a wall that traps moisture. Rainscreen adds $2–$3/sf. Many Seattle bids skip it because it’s not code-required — British Columbia mandated it after their 1990s envelope crisis. Same climate, same risk.
James Hardie sells two formulations — HZ5 for climates with snow, ice and hard freezes, HZ10 for wet, humid climates. Seattle is HZ10 territory. HZ5 is cheaper at the supplier and looks identical, but installing it here voids the warranty and accelerates failure. Hardie certification requires HZ10 in our zone.
Hardie’s 30-year non-prorated warranty assumes the siding went on to Hardie’s published instructions, and it excludes damage caused by improper installation. A crew that skips the spec saves time; you absorb the risk.
A bid that doesn’t mention rot is a bid that’ll surprise you mid-project. Honest bids carry a written contingency: “Substrate repair priced at $X/sf if rot is found at tear-off, documented and approved before proceeding.” If your quote is silent on this, ask why.
Unpermitted re-sides are cheaper to bid because there are no fees and no inspections to schedule. They’re also a problem at resale — inspectors flag them, buyers’ lenders ask about them, and the city can require retroactive permitting. Pulling the permit up front costs less than fixing it later.
The fair-price test: a Seattle Hardie re-side under $12/sf installed is missing line items. Under $10/sf, it’s missing several. Get the line-item breakdown in writing, then compare bids on the same scope — not on the bottom-line number.
Not sure where to start?
We’ll come out, look at your siding, and give you a straight answer — even if the answer is “you don’t need us yet.”
What Recent Seattle Re-Sides Have Actually Cost
Three recent projects from our case studies, with the kind of detail you’d normally only see on a finished invoice.
Failed cedar replaced with Lunawood thermally-modified wood over cross-batten rainscreen. ~2,400 sf wall area, 2-story Craftsman, full WRB rebuild, 1 area of substrate repair. Project total range: $85K–$110K.
Full tear-off to sheathing, continuous rigid exterior insulation, ventilated rainscreen, HardiePlank HZ10 in ColorPlus. ~3,200 sf wall area, complete PNW wall assembly. Project total range: $95K–$130K.
HardiePanel B&B with HardieTrim battens, new HydroGap WRB, integrated window flashings. ~2,100 sf wall area, 2-story, minimal substrate work. Project total range: $42K–$58K.
10 Line Items Your Siding Quote Should Have
Before signing anything, scan the quote for these. If any are missing or vague, ask. A reputable contractor will be happy to write them in. Our Seattle siding contractor page shows how we build every one of these into a written, fixed-price quote.
- 1 Wall square footage being clad — not interior sf, not perimeter, the actual wall area. Should be a specific number, not a range.
- 2 Specific product, profile, and finish — e.g., “HardiePlank Lap, Cedarmill, 8.25″ reveal, ColorPlus Iron Gray.” Not just “Hardie siding.”
- 3 HZ10 product (Pacific Northwest formulation) explicitly named for any Hardie quote. HZ5 is cheaper and voids the warranty here.
- 4 Tear-off and disposal — explicitly listed, not implied. Includes dumpster, hauling, and final magnet sweep.
- 5 New WRB with the brand named (HydroGap Drainable, ProClima Solitex, etc.) — never “reuse existing.”
- 6 Rainscreen detail if applicable — furring depth, vertical or horizontal orientation, ventilation top and bottom.
- 7 Window and door flashing — head, sill, and jamb flashing methodology spelled out (sill pan, end dams, kickout flashings at roof intersections).
- 8 Substrate repair contingency — written rate per sf if rot is found, with the requirement that you approve in writing before any extra work proceeds.
- 9 Permit fee — either listed as the contractor pulling it on your behalf and billing back, or explicitly “owner pulls permit” (rare and not recommended).
- 10 Warranty terms in writing — product warranty (Hardie 30-year non-prorated when certified-installed), workmanship warranty (typical 2–5 years), and what happens if you sell the home.
Siding Cost Questions, Honestly Answered
Want the Exact Number for Your Home?
The calculator gives you a ballpark. A free on-site assessment with Paul gives you a written, line-itemized quote — including material, finish, WRB, rainscreen, flashing detail, and substrate contingency. No salesman. No pressure.
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