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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

$115.02 per square foot for standard grade construction (Range: $88.87 - $141.16)
Free Estimates from Local Pros

Cost of Building a Garage Addition

$41.82 per square foot (custom designed, standard grade) (Range: $36.59 - $47.05)
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Cost of Building a Sunroom

$108.09 per square foot (three-season room) (Range: $88.82 - $127.35)
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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

$68.37 per square foot (Range: $40.70 - $96.04)
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Cost of Building a Closet

$1,614.51 for standard bedroom closet (4 ft reach-in) (Range: $1,541.58 - $1,687.43)
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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

73115, Oklahoma City, Oklahoma - March 27, 2024

Building a Home Addition

$100.00 to $200.00 per square foot for standard grade construction
very seldom do i figure entire job by the foot, i generally figure material plus labor plus 20% or cost plus-total materials and labor plus 20%

Reported by:
Guy Brown, Guy Brown
See the Oklahoma City Home Additions Cost Report
62521, Decatur, Illinois - May 16, 2021

Building a Garage Addition

$31.99 to $41.13 per square foot (custom designed, standard grade)
Manhours for building a garage addition are included. Estimate includes standard materials and waste removal. However, it does not include design drawings.

Reported by:
ProMatcher Research Team
See the Decatur Home Additions Cost Report
76004, Arlington, Texas - November 14, 2022

Building a Sunroom

$82.42 to $118.17 per square foot (three-season room)
This is a base price for sunroom installation. The standard rate includes standard three-season room addition with builder-grade materials (windows, siding, and roofing) and standard electrical work. An additional cost may apply for installing insulation, extending heating and/or cooling system, installing plumbing, and pulling permits.

Reported by:
ProMatcher Research Team
See the Arlington Home Additions Cost Report
35401, Tuscaloosa, Alabama - October 29, 2020

Dormer Addition

$2,800.16 to $3,112.34 for single-window gable dormer
Estimate includes dormer addition construction. Cost does include framing, roofing, and finishing a gable dormer with a single window. Additional charge for 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 Tuscaloosa Home Additions Cost Report
44705, Canton, Ohio - November 30, 2023

Home Remodeling

$10.00 to $150.00 per square foot
At Majestic Construction &Remodeling LLC we believe that our relationship with our clients should be one of trust and good faith, where each party gives value for the benefit received from the other. For that reason, we are pleased to offer a free initial consultation in order to determine what services you may require. We pride ourselves in giving each potential client a unique experience because not one project or build is the same

Reported by:
Mary Caldwell, Majestic Construction & Remodeling
See the Canton Home Additions Cost Report
46624, South Bend, Indiana - January 18, 2023

Building a Closet

$1,323.82 to $1,449.06 for standard bedroom closet (4 ft reach-in)
Manhours for closet building are included in estimate. Cost takes into account framing walls and hanging drywall to add a closet to an existing room (4 ft wide). Additional charge for shelving systems, storage solutions, cabinets, lighting, or larger closets.

Reported by:
ProMatcher Research Team
See the South Bend Home Additions Cost Report
23237, Richmond, Virginia - February 23, 2024

Building a Home Addition

$175.00 to $270.00 per square foot for premium grade construction
$125.00 to $240.00 per square foot for standard grade construction
Accept checks . Credit card payments

Reported by:
Samer Alawar, PRO-TECH CONSTRUCTION
See the Richmond Home Additions Cost Report
01613, Worcester, Massachusetts - May 16, 2021

Building a Garage Addition

$44.42 to $57.11 per square foot (custom designed, standard grade)
Estimated quote includes labor for garage construction. No additional charge for standard materials and project cleanup. Cost estimate excludes blueprint preparation.

Reported by:
ProMatcher Research Team
See the Worcester Home Additions Cost Report
23320, Chesapeake, Virginia - November 14, 2022

Building a Sunroom

$117.86 to $168.98 per square foot (three-season room)
This is a base price for sunroom installation. The standard rate includes adding a three-season room to an existing structural base, installing standard-grade windows, siding, roofing and fixtures, and installing electrical access. An additional cost may apply for insulation, HVAC, plumbing work, and construction permits.

Reported by:
ProMatcher Research Team
See the Chesapeake Home Additions Cost Report
87401, Farmington, New Mexico - October 29, 2020

Dormer Addition

$2,871.20 to $3,191.30 for single-window gable dormer
Includes pricing for dormer addition construction. Cost takes into account framing, roofing, and finishing a gable dormer with a single window. 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 Farmington 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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