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Seattle Roof Cost Calculator (Free Instant Estimate) - K Single Corp Roofing Seattle
Free Estimate Tool

Seattle Roof Cost Calculator (Free Instant Estimate)

Get an instant estimate for your roof replacement. Answer five quick questions to see real Seattle-area pricing.

Use our free roofing cost calculator to estimate the price of a new roof for your Seattle-area home. Most homeowners pay $10,000 to $40,000 for a full roof replacement, depending on material, size, and roof complexity.

1

Is this roof for a home or a commercial building?

2

Approximate roof area for your home or building.

3

Flat roofs use membrane materials. Normal and complex roofs use shingles or metal.

4

Select the material you are considering for your new roof.

5

Is there any known damage to the decking, rafters, or sheathing?

Estimated Cost Range

$0 to $0

Based on Seattle-area pricing, updated April 2026

Your Selections

Property Type
Residential
Square Footage
2,000 to 3,000
Roof Shape
Normal Roof
Material
Malarkey Vista Shingle
Structural Damage
No

Get an Exact Quote

Your information is private. We never share it with third parties.

Schedule a free on-site inspection. Detailed line-item quote within 48 hours.

Schedule Free Inspection Call (206) 659-4349

Financing available for qualified homeowners.

This is an estimate based on average Seattle-area pricing. Your actual cost may vary based on accessibility and specific conditions.

25+
Years Experience
15,000+
Projects Completed
4.7★
Google Rating
10-Year
Workmanship Warranty
Cost Comparison

How Much Does Each Roofing Material Cost in Seattle?

Current Seattle-area pricing for the roofing systems we install. Costs include materials, labor, underlayment, and standard flashing.

Material Cost / Sq Ft 2,500 Sq Ft Roof
Malarkey Vista Shingle $4.50 to $7.00 $11,250 to $17,500
Malarkey Legacy $5.50 to $8.50 $13,750 to $21,250
Malarkey Windsor $6.50 to $10.00 $16,250 to $25,000
Metal $10 to $16 $25,000 to $40,000
PVC (Flat) $6 to $11 $15,000 to $27,500
TPO (Flat) $5 to $9 $12,500 to $22,500
Torch Down $4 to $8 $10,000 to $20,000

Prices reflect Seattle/King County area averages as of April 2026. Actual costs vary by project complexity. Compare all roofing types

Repairs

How Much Does Roof Repair Cost in Seattle?

This calculator prices full replacements, and plenty of roofs do not need one. For repairs we quote in two broad bands across the Seattle area.

Isolated repairs

$300 to $1,500

Such as a cracked pipe boot, a few lifted shingles or a short run of failed flashing.

Larger or structural repairs

$1,500 to $3,500

Where decking, a valley or a wider section of the roof has to be opened up.

What Drives the Price

Where a repair lands inside those bands comes down to four things.

01

Access

A single-story house with a clear driveway is quicker to set up on than a three-story home on a hillside lot.

02

Pitch

A steep roof calls for harnesses, roof jacks and slower, more careful work.

03

Material

Composition shingles are the simplest to patch, while metal, tile and low-slope membranes each need their own parts and methods.

04

How Far the Water Has Traveled

A leak caught at the shingle surface is a small job, but one that has soaked the underlayment and softened the decking means cutting out and replacing wood before the roof can be closed up again.

Those details only show up on the roof itself, so every repair quote starts with a free inspection and ends with a written, line-item estimate.

Roof Repair Service Roof Leak Repair
By Size

Roof Replacement Cost by Home Size in Seattle

Each range below uses the calculator's default settings (a residential home, a normal roof shape, Malarkey Vista architectural shingles and no structural damage) and its per-square-foot pricing, rounded to the nearest $100 the same way the calculator rounds. The calculator measures roof area, not floor area, so read each figure as the size of the roof.

1,000 sq ft

$4,500 to $7,000

Roofs this size usually sit on small single-story homes, cottages and detached garages with living space above. With so little area to cover, details like a chimney, a skylight or a tricky roof-to-wall joint make up a bigger share of the work.

1,500 sq ft

$6,800 to $10,500

This is also the figure the calculator shows for its 1,000 to 2,000 sq ft setting, because it prices that setting at 1,500 sq ft. Many single-story ramblers and smaller two-story homes in the Seattle area land here.

2,500 sq ft

$11,300 to $17,500

This matches the calculator's default 2,000 to 3,000 sq ft setting. The Malarkey Vista row in the material table above lists the same roof size before rounding.

3,000 sq ft

$13,500 to $21,000

Larger roofs often carry more valleys, hips and dormers. If yours does, switch the calculator to Complex Roof to see how the added cutting and flashing change the range.

Pricing Factors

What Factors Affect the Cost of a New Roof?

01

Property Type

Commercial buildings often require larger crews, commercial-grade membranes, and rooftop unit flashing, which shifts pricing compared to residential jobs.

02

Roof Size

Larger roofs cost more in absolute dollars but benefit from slightly lower per-square-foot pricing due to mobilization efficiencies.

03

Material Choice

The single biggest cost factor. Shingle systems are most affordable. Metal and designer profiles cost 2 to 3x more but last 2 to 3x longer.

04

Roof Shape

Complex roofs with multiple valleys, hips, and dormers can add 20 to 40% to labor and material waste compared to a simple gable roof of the same size.

05

Tear-off vs. Overlay

Removing the existing roof adds $1,000 to $3,000. Required when two layers already exist or when deck inspection is needed.

06

Structural Damage

Rotted decking, damaged rafters, or sheathing replacement adds $2 to $5 per sq ft. Common in older PNW homes with moisture exposure.

07

Accessibility

Steep pitches, multi-story access, tight lots, and landscaping protection all add labor time. Second-story roofs add 10 to 20%.

08

Permits

Seattle-area building permits for roofing typically cost $200 to $500 depending on municipality and scope.

Next Steps

How to Get an Exact Roofing Quote

1

Use Our Calculator

Get an instant estimate based on your roof details.

2

Schedule Inspection

We measure your roof, inspect the decking, and assess complexity.

3

Receive a Quote

Line-item pricing with material options. No hidden fees.

4

Compare and Decide

No pressure. Honest recommendations, your timeline.

FAQ

Roofing Cost Questions

Answers to the most common roofing cost questions from Seattle homeowners.

How much does a new roof cost in Seattle?
For an average 2,500 sq ft residential home: composition shingles run $11,250 to $25,000 across our three Malarkey grades, metal roofing runs $25,000 to $40,000, and flat roofing systems run $10,000 to $27,500 (torch-down to PVC). The final price depends on roof size, shape, material grade, and whether any decking repair is needed. Cedar shake and composite roofing are priced on request.
How much does it cost to replace a roof on a 2,000 square foot house?
For a 2,000 sq ft roof in the Seattle area: Malarkey Vista composition shingles cost $9,000 to $14,000, Malarkey Legacy costs $11,000 to $17,000, Malarkey Windsor costs $13,000 to $20,000, metal costs $20,000 to $32,000, TPO flat roofing costs $10,000 to $18,000, and PVC flat roofing costs $12,000 to $22,000. These ranges include tear-off, disposal, underlayment, flashing, and installation labor.
What factors affect roof replacement cost?
The seven main factors are: roof size (measured in squares, where 1 square = 100 sq ft), material choice, roof pitch (steeper = more expensive), number of stories, tear-off requirements, roof complexity (valleys, dormers, skylights), and condition of existing decking. In the Seattle area, moisture damage to decking is a common cost addition.
How much does a metal roof cost compared to shingles?
In the Seattle area, a metal roof costs roughly 2 to 2.5x more than composition shingles upfront. However, metal roofs last 40 to 70 years vs. 20 to 30 years for shingles. On a cost-per-year basis, metal roofing can be less expensive over the long run, with metal requiring zero maintenance vs. periodic moss treatment for shingles.
Does a complex roof shape affect cost?
Yes. A complex roof with multiple valleys, dormers, hips, and skylights can add 20 to 40% to the total cost compared to a simple gable roof of the same square footage. Complex shapes require more flashing, more waste cut-offs, longer labor hours, and more skilled installation.
How much does a flat roof replacement cost?
Flat roof replacement in the Seattle area costs $4 to $11 per sq ft installed. For a 1,000 sq ft flat section: torch down runs $4,000 to $8,000, TPO runs $5,000 to $9,000, and PVC runs $6,000 to $11,000. Torch down is the most affordable flat roof option.
What is the cheapest roofing material?
For sloped roofs, architectural shingles (like Malarkey Vista) are the most affordable premium option at $4.50 to $7.00 per sq ft installed. For flat roofs, torch down modified bitumen is cheapest at $4 to $8 per sq ft. For long-term value, architectural shingles or standing seam metal provide the best cost-per-year of ownership.
How much does structural damage add to a roofing project?
Rotted decking, damaged rafters, or water-damaged sheathing typically add $2 to $5 per sq ft to the project. In the Seattle area, PNW moisture makes decking repair a common cost addition. The final figure depends on the extent of damage, which our crew can only confirm after tearing off the existing roof.
Do roofing companies charge for estimates?
Some do, but K Single Corp does not. Every estimate we give is free and comes in writing, with each line item listed so you can see exactly what the work includes before you decide.
How much does roof repair cost compared to replacement?
Isolated repairs typically run $300 to $1,500, and larger or structural repairs run $1,500 to $3,500. A full replacement costs many times more, so we always check whether a repair will do the job first. See our roof repair service for what a repair visit includes, or use the calculator above to price a replacement.
Ready to Protect Your Home? - K Single Corp Roofing Seattle

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