Additions and Conversions · Additions
Home Addition Cost, Permits and Who Does the Work
First-time installation of home addition on a single-family home, typically handled by a general contractor.
Model reviewed August 2026
Typical cost
$110,000
National, standard scope
Range
$45,000 – $260,000
Low to high scope
Trade
General contractor
DIY difficulty 1/5
Permit
Usually required
Plan on a permit and inspection
Do I need a permit for home addition?
Usually yes
Home Addition work at this scope touches structure, life safety or a permitted trade in most jurisdictions, so a permit and inspection are normally required. Always confirm with the building department that has jurisdiction over your address.
Cost breakdown
Modeled national figures for a standard single-family job.
| Low endSimple scope, easy access, no surprises | $45,000 |
|---|---|
| TypicalWhat most homeowners pay | $110,000 |
| High endLarge scope, upgrades or difficult conditions | $260,000 |
| Job type | Project |
| Cost varies by location | High |
Variants
Distinct options within this job that buyers compare before committing.
Calculators for this job
Also searched as
You may also hear this called:
install home addition · home addition installation · new home addition · home addition install cost · put in home addition
Frequently asked questions
How much does home addition cost?
Most homeowners pay between $45,000 and $260,000, with $110,000 typical for a standard single-family job. Figures are modeled national estimates, not quotes.
Do I need a permit for home addition work?
Yes — in most jurisdictions this job is permitted and inspected. Check your local building department before work starts.
Who does home addition?
A general contractor handles this job. DIY difficulty is rated 1/5 (5 = very DIY friendly).
Does the price change much by location?
Yes. Across the states we price, the typical cost ranges from $99,000 to $144,100 — about a 46% spread — driven by labor rates, code requirements and permit fees.