How Much Does Siding Replacement Cost in Seattle? (2026 Guide)
Real pricing from a contractor who doesn’t hide numbers. Here’s what siding replacement actually costs in Seattle in 2026, broken down by material, scope, and what separates a real quote from a lowball trap.
Siding Replacement Cost in Seattle: The Quick Numbers
Siding replacement in Seattle costs $13–$40 per square foot installed depending on the material you choose. For a typical home with 1,500–2,500 square feet of wall area, that means a total project cost of $21,000–$70,000.
Material is about 30–40% of that total. The rest is labor and proper installation — the weather-resistant barrier (WRB), flashing at every window and penetration, old siding removal and disposal, permits, and site cleanup. These aren’t extras. They’re what makes siding actually protect your house.
The range is wide because material choice matters enormously. James Hardie fiber cement and LP SmartSide sit at the lower end. Western Red Cedar and metal panel systems push toward the top. Every material has trade-offs in durability, maintenance, and appearance — price alone doesn’t tell you which is right for your home.
Siding Replacement Cost by Material
| Material | Cost per Sq Ft (Installed) | Typical Home (1,500–2,500 sqft) | Best For |
|---|---|---|---|
| James Hardie HZ10 | $14–$20/sqft | $21,000–$50,000 | Durability, low maintenance, fire resistance |
| LP SmartSide | $14–$20/sqft | $21,000–$50,000 | Impact resistance, workability, clean look |
| Western Red Cedar | $20–$40/sqft | $30,000–$100,000 | Natural beauty, character homes, traditional PNW style |
| Metal Panel Systems | $30–$55/sqft | $45,000–$137,500 | Modern aesthetic, longevity, zero maintenance |
Note: All prices include old siding removal, WRB installation, flashing, new siding installation to manufacturer spec, trim, caulking, permits, and site cleanup. Prices reflect Seattle-area labor rates as of early 2026.
What’s Included in a Proper Siding Quote
If any of these items are missing from a siding replacement quote, you’re not comparing apples to apples. A complete quote from a legitimate contractor includes all of the following:
Complete tear-off of existing siding down to the sheathing. This lets you inspect the substrate for rot or damage before covering it back up. Disposal of all old material included.
A new weather-resistant barrier goes over the sheathing before any siding is installed. This is your home’s primary defense against bulk water intrusion. Not optional in Seattle’s climate.
Proper flashing at every window, door, utility penetration, and transition point. This is where most moisture failures happen, and where cheap contractors cut corners first.
Siding installed exactly per manufacturer instructions — correct fasteners, correct spacing, correct overlap. This is what keeps the product warranty valid.
All corner trim, window trim, transition trim, and caulking at joints and penetrations. Proper caulking with compatible sealants prevents water from finding its way behind the cladding.
Building permits are required for siding replacement in Seattle and surrounding cities. A legitimate contractor includes permit fees in the quoted price — not as a surprise add-on.
Full cleanup of the job site including nail sweeps, debris removal, and landscape restoration. Your property should look better when we leave, not worse.
What Drives Siding Replacement Cost Up
The per-square-foot ranges above cover most homes, but certain factors push costs toward the higher end — or beyond it. Here’s what adds to a siding project:
Two-story homes add 15–20% to the project cost. Scaffolding setup and teardown, material staging at height, and slower production rates all factor in. Three stories adds more.
Bay windows, multiple rooflines, dormers, architectural details, and irregular wall sections all add labor time. A simple rectangular home costs less per square foot than one with a dozen corners and transitions.
Rot behind the siding is common in Seattle homes. Sheathing replacement and framing repair are priced separately because the scope can’t be determined until the old siding comes off.
Clear-grade cedar costs significantly more than fiber cement. Metal panel systems with concealed fasteners are premium. The material you choose is the single biggest variable in your total cost.
Adding a rainscreen drainage plane behind the siding improves moisture management and extends the life of both the siding and the wall assembly. It adds cost but is increasingly recommended in the Pacific Northwest climate.
Why the Cheapest Quote Is Never the Best Deal
When one siding quote comes in 30–40% below the others, it’s not because that contractor found a secret to efficiency. It’s because they’re leaving things out. Here’s what cheap contractors typically skip:
Skipping the weather-resistant barrier or using leftover housewrap from a different job. Without proper WRB, bulk water reaches your sheathing every time it rains — which in Seattle is often.
Cedar must be primed on all six sides before installation. Skipping back-priming lets moisture absorb from behind, causing cupping, warping, and premature failure.
No permit means no inspection, no documentation, and no recourse if something goes wrong. It also creates problems when you sell your home.
Each siding product requires specific fasteners — type, length, material, and placement. Wrong fasteners void the warranty and can cause siding to crack, pop, or fall off.
Proper head flashing, pan flashing, and kick-out flashing at every window, door, and roof-to-wall transition. This is where the majority of siding failures originate.
A drainage gap behind the cladding lets incidental moisture drain and dry. Skipping it traps moisture against the WRB and sheathing, accelerating rot.
These aren’t upsells. They’re what makes siding last 30 years instead of failing in 5. When a contractor skips them, you pay for the siding twice — once for the cheap installation and again when you hire someone to tear it off and do it right.
Siding Replacement Cost FAQ
How much does it cost to replace siding on a house in Seattle?
In 2026, full siding replacement in Seattle typically costs $13–$40 per square foot installed, depending on the material. For a typical home with 1,500–2,500 square feet of wall area, that translates to roughly $20,000–$100,000. James Hardie and LP SmartSide run $15–$21/sqft, Western Red Cedar ranges $20–$40/sqft, and metal panel systems cost $30–$55/sqft. These prices include tear-off, WRB, flashing, and installation.
Why are some siding quotes so much cheaper than others?
Cheap quotes usually leave things out. Common shortcuts include skipping the weather-resistant barrier (WRB), not back-priming cedar, pulling no permits, using incorrect fasteners, omitting flashing at windows and penetrations, and skipping rainscreen where it’s needed. These shortcuts save money upfront but lead to moisture damage, voided warranties, and expensive repairs within 5–10 years.
What should be included in a siding replacement quote?
A complete siding replacement quote should include: old siding removal and disposal, WRB installation, flashing at every window/door/penetration, new siding installed to manufacturer spec, all trim and caulking, permit fees, and full site cleanup. If any of these items are missing, you’re not comparing apples to apples. Material cost is only 30–40% of the total — labor and proper installation make up the rest.
Does substrate repair (rot) add to siding replacement cost?
Yes. Rot behind the siding is common in Seattle homes, especially those with older siding or failed flashing. Sheathing replacement and framing repair are typically priced separately because the full scope of damage can’t be determined until the old siding is removed. A good contractor will provide a per-square-foot allowance for substrate repair and adjust the final price based on actual conditions found during tear-off.
Get a Real Number for Your Home
Every home is different. Paul will walk your property, measure the actual wall area, assess complexity, and give you a detailed quote with no hidden costs. The number you see is the number you pay.
GP General Corp · Licensed Siding Contractor Seattle · WA License #GPGENGC830KD