Seattle Home Additions Costs & Prices
Seattle, Washington. The Seattle Home Additions Cost Report is a concise report on everything you need to know about the cost of home additions in the Seattle area.
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Average Home Additions Cost in Seattle
We have done a little research to find the average cost of home additions in Seattle. Here are the average costs and prices reported back to us:
Cost of Building a Home Addition in Seattle, Washington$126.77 per square foot for standard grade construction (Range: $97.95 - $155.58) Free Estimates from Local ProsCost of Building a Garage Addition in Seattle, Washington$46.09 per square foot (custom designed, standard grade) (Range: $40.33 - $51.85) Free Estimates from Local ProsCost of Building a Sunroom in Seattle, Washington$116.38 per square foot (three-season room) (Range: $95.64 - $137.12) Free Estimates from Local ProsCost of Dormer Addition in Seattle, Washington$3,600.78 for single-window gable dormer (Range: $3,410.66 - $3,790.90) Free Estimates from Local ProsCost of Building a Closet in Seattle, Washington$1,738.34 for standard bedroom closet (4 ft reach-in) (Range: $1,659.82 - $1,816.85) Free Estimates from Local Pros |
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Seattle Home Additions Cost Data
Professionals in the Seattle area have provided information about how much home additions cost(s). Here are some of the individual reports:
98108, Seattle, Washington - January 18, 2023
Building a Closet$1,748.77 - $1,914.21 for standard bedroom closet (4 ft reach-in)
Estimate includes labor for closet building. Includes framing walls and hanging drywall to add a closet to an existing room (4 ft wide). Cost does not include shelving systems, storage solutions, cabinets, lighting, or larger closets.
Reported by:
ProMatcher Research Team |
98108, Seattle, Washington - November 14, 2022
Building a Sunroom$100.76 - $144.47 per square foot (three-season room)
This is a general estimate for sunroom installation. Cost does include adding a three-season room to an existing structural base, installing standard-grade windows, siding, roofing and fixtures, and installing electrical access. Cost does not include installing insulation, extending heating and/or cooling system, installing plumbing, and pulling permits.
Reported by:
ProMatcher Research Team |
98108, Seattle, Washington - December 10, 2021
Building a Home Addition$103.19 - $163.91 per square foot for standard grade construction
Includes labor. Cost estimate also includes standard materials (windows, siding, roofing, electrical, fixtures), construction permits, and waste removal. Excludes construction drawings, premium finishes, and deep foundations.
Reported by:
ProMatcher Research Team |
98108, Seattle, Washington - May 16, 2021
Building a Garage Addition$42.49 - $54.63 per square foot (custom designed, standard grade)
Labor is included. Estimate accounts for standard materials and project cleanup. Doesn't include blueprint preparation.
Reported by:
ProMatcher Research Team |
98108, Seattle, Washington - October 29, 2020
Dormer Addition$3,593.44 - $3,994.06 for single-window gable dormer
Cost estimate includes dormer addition construction. Price does include framing, roofing, and finishing a gable dormer with a single window. Items excluded: larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations.
Reported by:
ProMatcher Research Team |
98201, Everett, Washington - January 18, 2023
Building a Closet$1,603.28 - $1,754.96 for standard bedroom closet (4 ft reach-in)
Includes closet installation labor cost. There is no additional charge for wall framing, drywall installation, and builder-grade finishes (rod, door, hinges, etc.). Price does not take into account built-in shelving, custom organization systems, and walk-in closets.
Reported by:
ProMatcher Research Team |
98009, Bellevue, Washington - January 18, 2023
Building a Closet$1,709.87 - $1,871.64 for standard bedroom closet (4 ft reach-in)
This is going rate for closet building. These items are typically include in the going rate: framing walls and hanging drywall to add a closet to an existing room (4 ft wide). It is unliklely that this will cover built-in shelving, custom organization systems, and walk-in closets.
Reported by:
ProMatcher Research Team |
98413, Tacoma, Washington - January 18, 2023
Building a Closet$1,577.35 - $1,726.57 for standard bedroom closet (4 ft reach-in)
Includes labor. Cost estimate also includes framing walls and hanging drywall to add a closet to an existing room (4 ft wide). Excludes shelving systems, storage solutions, cabinets, lighting, or larger closets.
Reported by:
ProMatcher Research Team |
98258, Lake Stevens, Washington - December 11, 2022
Building a Home Addition$160.00 to $200.00 per square foot for premium grade construction
$80.00 to $160.00 per square foot for standard grade construction
Price depending upon multiple factors like age of home, access and security, materials and material grade, difficulty of building features, timeline of final inspection. We strive hard to keep our cost to the client down without cutting corners or using inferior materials/products and unskilled or inexperienced labor. By using highly skilled workers who showed skillsets vital to production and growth in the industry, we can pass the savings of having to repurchase materials and extended manhours just repairing costly mistakes by people with no business being in our business onto the customer and the projects bottom line.
Reported by:
Quinn McKay, Alpha-Pac NW Construction |
98413, Tacoma, Washington - November 14, 2022
Building a Sunroom$90.89 - $130.31 per square foot (three-season room)
Cost includes manhours for sunroom installation. No additional charge for adding a three-season room to an existing structural base, installing standard-grade windows, siding, roofing and fixtures, and installing electrical access. No installing insulation, extending heating and/or cooling system, installing plumbing, and pulling permits included.
Reported by:
ProMatcher Research Team |
98009, Bellevue, Washington - November 14, 2022
Building a Sunroom$98.52 - $141.25 per square foot (three-season room)
Labor is included. Estimate accounts for building a three-season sunroom onto an existing patio, deck, or slab foundation, standard materials (windows, siding, roofing, etc.), and basic electrical wiring. Doesn't include insulation, HVAC, plumbing work, and construction permits.
Reported by:
ProMatcher Research Team |
98201, Everett, Washington - November 14, 2022
Building a Sunroom$92.38 - $132.45 per square foot (three-season room)
Manhours for sunroom construction are included. Estimate includes standard three-season room addition with builder-grade materials (windows, siding, and roofing) and standard electrical work. However, it does not include insulation, HVAC, plumbing work, and construction permits.
Reported by:
ProMatcher Research Team |
98009, Bellevue, Washington - December 10, 2021
Building a Home Addition$100.90 - $160.27 per square foot for standard grade construction
Cost estimate range considers home addition construction labor. Accounts for the price of permits, builders grade materials, demolition, cleanup and disposal. Items excluded: high end finishes, deep foundations, and architectural plan preparation.
Reported by:
ProMatcher Research Team |
98413, Tacoma, Washington - December 10, 2021
Building a Home Addition$93.08 - $147.85 per square foot for standard grade construction
Cost range takes into account building a home addition labor. No additional charge for standard materials (windows, siding, roofing, electrical, fixtures), construction permits, and waste removal. Items excluded: construction drawings, premium finishes, and deep foundations.
Reported by:
ProMatcher Research Team |
98201, Everett, Washington - December 10, 2021
Building a Home Addition$94.61 - $150.28 per square foot for standard grade construction
Cost estimate considers the price of home addition construction. Price accounts for standard grade materials, demo, building permits, and construction cleanup. Does not include high end finishes, deep foundations, and architectural plan preparation.
Reported by:
ProMatcher Research Team |
98413, Tacoma, Washington - May 16, 2021
Building a Garage Addition$38.32 - $49.27 per square foot (custom designed, standard grade)
This estimated cost includes garage construction labor. Price estimate includes standard materials and project cleanup. Items excluded: blueprint preparation.
Reported by:
ProMatcher Research Team |
98201, Everett, Washington - May 16, 2021
Building a Garage Addition$38.95 - $50.09 per square foot (custom designed, standard grade)
Labor for building a garage addition is included in the cost. Does include standard materials and waste removal. Price excludes design drawings.
Reported by:
ProMatcher Research Team |
98009, Bellevue, Washington - May 16, 2021
Building a Garage Addition$41.55 - $53.41 per square foot (custom designed, standard grade)
Manhours for building a garage addition are included in cost. Estimate includes standard grade materials and debris removal. Items excluded: design drawings.
Reported by:
ProMatcher Research Team |
98413, Tacoma, Washington - October 29, 2020
Dormer Addition$3,241.20 - $3,602.55 for single-window gable dormer
Price takes into account labor. It also includes framing, roofing, and finishing a gable dormer with a single window. Does not include larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations.
Reported by:
ProMatcher Research Team |
98201, Everett, Washington - October 29, 2020
Dormer Addition$3,294.48 - $3,661.77 for single-window gable dormer
Price of dormer addition construction is included. It also accounts for the cost of framing, roofing, and finishing a gable dormer with a single window. Cost excludes larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations.
Reported by:
ProMatcher Research Team |
98009, Bellevue, Washington - October 29, 2020
Dormer Addition$3,513.52 - $3,905.23 for single-window gable dormer
Price of dormer addition construction is included in the estimate. Estimate also includes cutting into an existing roof, framing structure, installing window, re-roofing, and re-siding. Does not include larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations.
Reported by:
ProMatcher Research Team |
98208, Everett, Washington - July 18, 2019
Building a Home Addition$200.00 to $280.00 per square foot for premium grade construction
$140.00 to $180.00 per square foot for standard grade construction
Location
House size
Reported by:
Timofey Karpenko, United Seattle LLC |
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Seattle Home Addition Contractors
Alpha-Pac NW Construction10402 35TH ST NE, Lake Stevens, WA 425-420-4606
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United Seattle LLC11008 27th Ave SE, Everett, WA 425-876-5866
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Day and night glass7231 East F St, Tacoma, WA 253-366-2001
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