Home addition contractors in the US
Room additions, second stories and bump-outs. Zoning setbacks and the structure of the existing house decide what is possible before price does.
- Metro areas
- 41
- Bump-out from
- $25,000
- Credentials explained
- 4
- Bump-out
- $25,000 – $60,000small single-room extension
- Room addition
- $80,000 – $200,000ground floor, finished
- Second-story addition
- $150,000 – $400,000whole or partial floor
- Cost per sq ft
- $200 – $500finished, varies by metro
Typical US ranges for a mid-range project in 2026. Local figures on each city page are adjusted for regional labor rates.
Home addition contractors by metro area
41 metro areas, each listing up to 10 firms from Google's results for that city, ordered by Google rating weighted by review count.
Major metros
- Home addition contractors in New YorkNew York
- Home addition contractors in Los AngelesCalifornia
- Home addition contractors in ChicagoIllinois
- Home addition contractors in HoustonTexas
- Home addition contractors in DallasTexas
- Home addition contractors in San FranciscoCalifornia
- Home addition contractors in Washington, DCDistrict of Columbia
- Home addition contractors in BostonMassachusetts
- Home addition contractors in SeattleWashington
- Home addition contractors in AtlantaGeorgia
- Home addition contractors in DenverColorado
- Home addition contractors in PhoenixArizona
- Home addition contractors in San DiegoCalifornia
- Home addition contractors in AustinTexas
- Home addition contractors in PhiladelphiaPennsylvania
- Home addition contractors in San JoseCalifornia
- Home addition contractors in MiamiFlorida
- Home addition contractors in MinneapolisMinnesota
- Home addition contractors in NashvilleTennessee
- Home addition contractors in CharlotteNorth Carolina
More metros
- Orange CountyCalifornia
- ScottsdaleArizona
- PortlandOregon
- SacramentoCalifornia
- RaleighNorth Carolina
- TampaFlorida
- OrlandoFlorida
- Fort WorthTexas
- San AntonioTexas
- Las VegasNevada
- Salt Lake CityUtah
- BaltimoreMaryland
- RichmondVirginia
- PittsburghPennsylvania
- ColumbusOhio
- ClevelandOhio
- CincinnatiOhio
- DetroitMichigan
- IndianapolisIndiana
- Kansas CityMissouri
- St. LouisMissouri
Licenses and certifications explained
The licenses and certifications that matter for home addition contractors, in plain English.
State or city contractor license
Legally requiredMost states license or register remodelers, and some leave it to cities. Where a license is required, working without one is illegal and usually voids your recourse. Check the number on the licensing board's own lookup.
EPA Lead-Safe Certified Firm (RRP)
Legally requiredFederal law requires it for paid renovation work that disturbs paint in homes built before 1978. If your house is that old, ask for the firm's certification before demolition starts.
National Association of the Remodeling Industry
The main remodeling trade body. Members agree to a code of ethics, and its Certified Remodeler (CR) designation requires experience plus an exam.
NAHB Certified Graduate Remodeler
A National Association of Home Builders designation for remodelers, covering business management, estimating and customer service.
Home addition contractors: common questions
Do I need an architect for a home addition?
Usually yes, or a design-build firm with in-house design. Additions need stamped structural drawings for the permit in most places, and zoning review on setbacks, height and lot coverage.