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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

$115.88 per square foot for standard grade construction (Range: $89.50 - $142.26)
$161.54 per square foot for premium grade construction (Range: $133.08 - $190.00)
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)
$28.84 per square foot (pre-designed kits and packages) (Range: $22.00 - $35.67)
Free Estimates from Local Pros

Cost of Building a Sunroom

$55.00 per square foot (four-season room) (Range: $45.00 - $65.00)
$5,500.00 for 10'x10' all season room (Range: $4,500.00 - $6,500.00)
Free Estimates from Local Pros

Cost of Dormer Addition

$3,267.12 for single-window gable dormer (Range: $3,094.61 - $3,439.62)
Free Estimates from Local Pros

Cost of Home Remodeling

2008.57% of total job cost (Range: 255.25% - 3761.88%)
$105.63 per square foot (Range: $83.75 - $127.50)
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

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

84065, Riverton, Utah - January 10, 2017

Building a Home Addition

$150.00 to $200.00 per square foot for premium grade construction
$100.00 to $150.00 per square foot for standard grade construction
Each job differs so I like to go see the jobs I do first. Then give an estimate. I normally do require some money down so I can put you on the schedule.

Reported by:
Dustin Morgan, DRM & Sons LLC
See the Riverton 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
01101, Springfield, Massachusetts - January 14, 2017

Dormer Addition

$3,338.88 to $3,711.12 for single-window gable dormer
Price includes labor. No additional charge for framing, roofing, and finishing a gable dormer with a single window. Cost estimate excludes larger dormers, electrical work or plumbing services, permit inspection fees, dormers for hip roofs, and interior space renovations.

Reported by:
ProMatcher Research Team
See the Springfield Home Additions Cost Report
91356, Tarzana, California - January 9, 2017

Home Remodeling

1000.00 to 15000.00 percent of total job cost
Cost depends on what room and what the scope of work wil be.

Reported by:
Tami Levy, AGA Construction, Inc.
See the Tarzana Home Additions Cost Report
16514, Erie, Pennsylvania - December 5, 2016

Building a Home Addition

$145.00 to $210.00 per square foot for premium grade construction
$125.00 to $140.00 per square foot for standard grade construction
We like to take each proposal and customize it to the customers needs that way we can get you an exact price so there are no surprises or add-ons.

Reported by:
Chris Jones, Jones Contracting LLC
See the Erie Home Additions Cost Report
01453, Leominster, Massachusetts - January 2, 2017

Building a Garage Addition

$36.15 to $46.48 per square foot (custom designed, standard grade)
This price includes building a garage addition. No additional charge for standard grade materials and debris removal. Cost does not account for design drawings.

Reported by:
ProMatcher Research Team
See the Leominster Home Additions Cost Report
01613, Worcester, Massachusetts - January 14, 2017

Dormer Addition

$3,756.24 to $4,175.01 for single-window gable dormer
Includes necessary manhours. Cost 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
See the Worcester Home Additions Cost Report
16514, Erie, Pennsylvania - December 5, 2016

Home Remodeling

$65.00 to $85.00 per square foot
We like to take each proposal and customize it to the customers needs that way we can get you an exact price so there are no surprises or add-ons.

Reported by:
Chris Jones, Jones Contracting LLC
See the Erie Home Additions Cost Report
48185, Westland, Michigan - September 29, 2016

Building a Home Addition

$150.00 to $250.00 per square foot for standard grade construction
Project will require a deposit along with multiple draw payments until completion

Reported by:
John Bauman, Midwest construction
See the Westland 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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