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Home Additions Costs & Prices - ProMatcher Cost Report

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Home Additions Costs & Prices


We have collected data nationwide to help calculate the average cost of home additions in the US. The following are average costs and prices reported back to us:

Cost of Building a Home Addition

$115.99 per square foot for standard grade construction (Range: $89.62 - $142.35)
$169.50 per square foot for premium grade construction (Range: $140.33 - $198.67)
Free Estimates from Local Pros

Cost of Building a Garage Addition

$41.77 per square foot (custom designed, standard grade) (Range: $36.53 - $47.01)
$23.50 per square foot (pre-designed kits and packages) (Range: $17.75 - $29.25)
Free Estimates from Local Pros

Cost of Building a Sunroom

$67.50 per square foot (four-season room) (Range: $60.00 - $75.00)
$67.50 per square foot (three-season room) (Range: $65.00 - $70.00)
$7,500.00 for 10'x10' all season room (Range: $5,750.00 - $9,250.00)
Free Estimates from Local Pros

Cost of Dormer Addition

$3,267.12 for single-window gable dormer (Range: $3,094.61 - $3,439.62)
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Cost of Home Remodeling

$108.50 per square foot (Range: $85.00 - $132.00)
Free Estimates from Local Pros

Cost of Building a Closet

$3,000.00 for typical walk-in closet (approx. 9'x9') (Range: $2,500.00 - $3,500.00)
$1,576.05 for standard bedroom closet (4 ft reach-in) (Range: $1,503.92 - $1,648.18)
Free Estimates from Local Pros
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Home Addition Contractors
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 Addition to House - Build
 Garage - Build
 Sunroom - Build
 Dormer - Addition
 Remodeling - One or More Rooms
 Closet - Build

Home Additions Cost Checklist

Building a Garage Addition Cost Checklist
When evaluating a garage addition cost estimate from a local contractor, make certain the estimate contains everything you want done. Here is a checklist of items you may want to consider:

- Are they going to “stick build” it (which means construct it onsite) or is it going to be a pre-packaged modular structure?

- Are they preparing or providing construction drawings (blueprints)?

- How do they plan on preparing the site for construction? Do they need to grade, fill, or compact the site?

- Are they going to do a soils test?

- What kind of foundation are they installing (concrete or aggregate).

- Are they going to be responsible for pulling permits?

- What type of garage door are they installing? Are they installing a garage door opener? If so, what kind?

- Will the garage have windows? If so, what kind (vinyl, wood)?

- What type and grade of roofing material are they installing?

- What type and grade of siding are they using (vinyl, wood, composite)?

- Will the interior be finished or unfinished?

- Are they installing any type of security system?

If you are interested in hiring a garage contractor, we can point you in the right direction. Learn more about hiring contractors and get a free garage cost estimate.

Home Additions Cost Factors

Cost of Building a Home Addition

Learn more about the factors that impact the cost of a home addition, including your geographic location and the quality of materials chosen.

Find Costs & Prices in Your City


Home Additions Cost Data

90802, Long Beach, California - April 27, 2017

Building a Home Addition

$150.00 to $225.00 per square foot for premium grade construction
$115.00 to $180.00 per square foot for standard grade construction
Construction will be based on clients requirements. We always include the client in the process of the planning phase so that the project is to their standards.

Reported by:
David Galvan, Galvan Construction & Development
See the Long Beach Home Additions Cost Report
27958, Moyock, North Carolina - July 20, 2017

Building a Garage Addition

$5.00 to $10.00 per square foot (pre-designed kits and packages)
Projects will be a cost estimate based on additional necessary materials and time necessary to complete.

Reported by:
Todd Robinson, TKR Ventures LLC
See the Moyock Home Additions Cost Report
61554, Pekin, Illinois - June 6, 2017

Building a Sunroom

$65.00 to $70.00 per square foot (three-season room)
$75.00 to $85.00 per square foot (four-season room)
$7,000.00 to $12,000.00 for 10'x10' all season room
Heat and electrical and foundation choices make big price difference

Reported by:
Sara Whiting, Custom Sunrooms & Home Improvements
See the Pekin Home Additions Cost Report
01420, Fitchburg, Massachusetts - January 14, 2017

Dormer Addition

$3,057.68 to $3,398.57 for single-window gable dormer
Price considers labor for dormer addition construction. Estimate accounts for framing, roofing, and finishing a gable dormer with a single window. No larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations included.

Reported by:
ProMatcher Research Team
See the Fitchburg Home Additions Cost Report
90802, Long Beach, California - April 27, 2017

Home Remodeling

$90.00 to $150.00 per square foot
Rooms can be remodeled to the client's budget and will try to accommodate their wish list in the remodel and will guide them through the whole process so that they are satisfied.

Reported by:
David Galvan, Galvan Construction & Development
See the Long Beach Home Additions Cost Report
01101, Springfield, Massachusetts - March 1, 2017

Building a Closet

$1,624.88 to $1,778.61 for standard bedroom closet (4 ft reach-in)
This estimated quote includes closet building. It also includes framing walls and hanging drywall to add a closet to an existing room (4 ft wide). Cost excludes shelving systems, storage solutions, cabinets, lighting, or larger closets.

Reported by:
ProMatcher Research Team
See the Springfield Home Additions Cost Report
92024, Encinitas, California - February 28, 2017

Building a Home Addition

$225.00 to $285.00 per square foot for premium grade construction
$125.00 to $150.00 per square foot for standard grade construction
On building materials we only mark them up 10% to cover our handling and delivery costs. We encourage the clients to shop online to get the best prices for their plumbing fixtures, lighting fixtures, appliances etc. This speeds up the construction process. We take care of all the rough materials.

Reported by:
Ed Renda, Boardwalk Construction
See the Encinitas Home Additions Cost Report
01101, Springfield, Massachusetts - January 2, 2017

Building a Garage Addition

$39.48 to $50.76 per square foot (custom designed, standard grade)
Cost takes into account the price of garage construction. No additional charge for standard materials and project cleanup. Price does not account for blueprint preparation.

Reported by:
ProMatcher Research Team
See the Springfield Home Additions Cost Report
30045, Lawrenceville, Georgia - August 31, 2015

Building a Sunroom

$45.00 to $65.00 per square foot (four-season room)
$4,500.00 to $6,500.00 for 10'x10' all season room
Give the customer a quality product at a competitive price.

Reported by:
R.J Andre, Sundance Outdoor Designs
See the Lawrenceville Home Additions Cost Report
01453, Leominster, Massachusetts - January 14, 2017

Dormer Addition

$3,057.68 to $3,398.57 for single-window gable dormer
This window dormer installation price quote presumes typical conditions. No additional charge for standard-grade materials and supplies to build gable dormer with one average-sized window. Cost excludes room-size additions, permits, interior finishes, hip roof dormers, shed dormers, home electrical wiring, or plumbing, .

Reported by:
ProMatcher Research Team
See the Leominster Home Additions Cost Report
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Disclaimer: Costs and prices shown on the ProMatcher site are intended to be used as general information, not as guaranteed estimates. To obtain cost information relevant to your project, request a quote or estimate from a local service provider.
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