Estimate your 2026 Seattle siding replacement — vinyl, LP SmartSide, fiber cement (James Hardie), cedar, metal, stucco, or brick and stone veneer. Enter the wall area, the number of stories and the material, then add tear-off, insulation, trim and soffit. The calculator returns an itemized material and labor breakdown.
Estimated based on home exterior dimensions (minimum 100 sq ft)
Affects labor costs and scaffolding requirements
Siding Materials
Choose your siding type and additional materials
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Add insulation layer for energy efficiency and R-value improvement
Professional removal and disposal of existing siding material
Installation labor for trim and soffit, per linear foot; the boards and panels are quoted separately
Linear feet of trim installation (labor; boards quoted separately)
Linear feet of soffit installation (labor; panels quoted separately)
Your Estimate
Configure your project and click Calculate
Enter your project details to get started
How Our Siding Cost Calculator Works
Professional siding replacement and installation estimates for Seattle homes
Accurate Cost Estimation
Our siding cost calculator prices a reside from Kolmo's own material catalog and labor rates. You enter the wall area to be sided and
the height of the house (one, two or three stories), then choose the siding material, including vinyl, engineered wood (LP SmartSide),
fiber cement (James Hardie), cedar and steel. Optional inputs add tear-off of the old siding, wall insulation, trim installation and soffit
installation. Siding material is ordered with a flat 10% waste allowance, and fasteners, house wrap and accessories are 8% of the siding
material cost. Installation labor is billed per square foot of wall and depends on both the material and the height of the house: on a
one-story home it runs from $0.57 a square foot for steel to $2.75 for fiber cement, and a two-story fiber cement install is $3.60.
What The Calculator Includes
Every siding estimate is itemized: the siding material with its waste allowance, a fasteners, house wrap and accessories line, and
installation labor per square foot of wall. Tear-off and disposal of the old siding adds $0.88 a square foot when you turn it on. Trim and
soffit are labor lines billed per linear foot, $4.00 for trim and $3.50 for soffit; the trim and soffit boards themselves are not
included. Insulation, when selected, is its own material line, and batts or rigid board add an installation line of $0.625 a square foot
of wall; spray foam is priced installed. Small jobs are raised to a job minimum. The calculator does not include
sheathing or framing repair, painting or finishing, scaffolding, a building permit, asbestos abatement or a contingency for hidden damage.
Rot behind old siding is common in Seattle and can only be measured once the siding is off, so it is priced after tear-off.
Seattle-Specific Considerations
Seattle's climate is hard on siding. Constant moisture exposure is more damaging over time than occasional extremes, so proper house
wrap, flashing and caulking matter as much as the siding itself. Many Seattle homes built before 1980 have original wood siding showing
decades of moisture damage, dry rot and woodpecker holes, and rotted sheathing or framing often turns up behind it; the calculator does not
include that repair, so it is assessed once the old siding comes off. Asbestos-cement siding on older homes needs a licensed abatement
contractor and its own quote. Fiber cement siding resists moisture, rot, insects and fire while keeping its appearance for decades, which
is why it is a common choice for Seattle's conditions. Cedar siding offers natural beauty but requires regular sealing or it deteriorates
quickly in our wet climate. The calculator has no permit line; whether a reside needs a permit depends on the city and the scope, so check
with your jurisdiction or ask us. Many Seattle neighborhoods, especially historic districts, have review requirements that can affect
material choices. Washington requires siding contractors to be registered with L&I, bonded and insured.
Using The Calculator Effectively
For accurate estimates, enter the exterior wall area to be sided in square feet (excluding roof area) and the number of stories,
since installation labor rises with height. Select siding material based on budget, maintenance willingness and longevity goals. On a
1,000 sq ft one-story home with the old siding torn off, the calculator comes to about $4.72 a square foot for vinyl, $6.54 for engineered
wood, $8.38 for fiber cement, $9.35 for cedar and $9.89 for steel, with material, accessories, installation and tear-off included. Turn on
removal if the old siding is coming off, at $0.88 a square foot, and enter trim and soffit footage if you want those installed. The estimate
lists each line and a time estimate in working days, and you can switch materials to compare them side by side.
Siding Cost Calculator: common questions
What is the best siding for Seattle's rainy climate?
Fiber cement siding (James Hardie, Allura) performs well in Seattle's wet climate. It resists moisture, won't rot, repels insects, is fire-resistant, and maintains its appearance for decades with minimal maintenance. It costs more than vinyl: on a 1,000 sq ft one-story reside with tear-off, the calculator comes to about $8.38 a square foot for fiber cement against $4.72 for vinyl. Cedar siding offers beautiful natural appearance but requires diligent maintenance in our climate. Avoid standard wood siding or non-pressure-treated materials that deteriorate rapidly in Seattle's moisture.
How long does siding replacement take?
Typical single-story homes (1200-1500 sq ft) take 1-2 weeks for complete siding replacement. Two-story homes (2000-2500 sq ft) take 2-3 weeks. Complex homes with dormers, multiple roof lines, or extensive architectural detail may take 3-4 weeks. Weather impacts timelines significantly in Seattle - rain delays work as proper moisture management requires dry conditions for installation. Projects started in summer (July-September) proceed faster than those in shoulder seasons. Add 3-5 days if significant sheathing repair is needed.
Should I remove old siding or install over it?
In Seattle, removing old siding is almost always recommended. Removal allows inspection of underlying sheathing and framing for rot damage (common in our wet climate), ensures proper moisture barrier installation, and provides a flat surface for new siding. Installing over old siding skips the calculator's $0.88 per square foot tear-off line but hides potential problems that worsen over time. Many Seattle homes have moisture damage behind failing siding that must be addressed. Building codes sometimes prohibit multiple siding layers. The extra cost of removal is worthwhile for long-term home health.
Why trust this siding estimate?
Kolmo LLC, established 2025, is a licensed, bonded and insured Washington general contractor (License #KOLMOL*753JS) working across Seattle and King County. This siding calculator prices from Kolmo's own material catalog and labor rates, not national averages. Every estimate returns an itemized breakdown of materials and labor, and the line items reconcile to the total so you can check the arithmetic yourself, and the cost of every option you switch on appears as its own line. Treat the result as a planning estimate rather than a quote: the final price is set after a walkthrough of the actual conditions, which is free and carries no obligation.
What this calculator captures
Installed prices from this calculator for 2026, per sq ft of wall, with house wrap and fasteners included. Fiber cement on 2,200 sq ft of wall of a two-story home, with tear-off, comes to $20,302. Vinyl, LP SmartSide, cedar, metal and stucco are priced in the calculator above.
Fiber cement, single-story
$8.38 / sq ft
1,000 sq ft of wall with tear-off: $8,382. Fire-safe and rot-proof, the Seattle standard. Trim and soffit are extra.
Fiber cement, two-story
$9.23 / sq ft
1,800 sq ft of wall with tear-off: $16,611. Trim and soffit are extra.
Brick or stone veneer
$19.10 / sq ft
1,000 sq ft of wall on a single-story home, no tear-off: $19,096. Masonry veneer is its own trade, so we confirm this price on site.
Using this calculator
Does this include old siding tear-off and disposal?
Yes — switch on 'Remove Old Siding' and the calculator adds $0.88 per sq ft of wall for tear-off and disposal. It does not price asbestos abatement: asbestos-cement siding, common on pre-1978 Seattle homes, needs a licensed abatement contractor and its own quote.
How does the calculator handle house wrap?
Standard house wrap, fasteners and accessories are in every quote, at 8% of the siding material cost. The calculator has no premium-barrier option; ask us on site if you want one.
What's the difference between LP SmartSide, fiber cement, and cedar?
LP SmartSide is engineered wood — cheapest quality tier, 50-year warranty, good for most Seattle homes. Fiber cement (Hardie) is the premium-standard — fireproof, rot-proof, 30-year paint warranty, labor-intensive. Cedar is the character choice for Craftsman, Tudor, Mid-Century — highest maintenance (refinish every 5-7 years) but unmatched aesthetics.
Does it cover trim, soffit, and fascia?
Trim and soffit are optional lines, priced per linear foot of installation labor: $4.00 for trim and $3.50 for soffit. The trim and soffit boards are not included, and fascia is not in the calculator.
How does Seattle's wet climate affect material choice?
Fiber cement is the safest long-term — zero rot, no refinishing. Cedar looks great but requires vigilant refinishing or it cups and checks. Vinyl is fine for 15-20 years before UV + freeze-thaw makes it brittle.
