Additions and Conversions
Additions: costs by job
Install, replace, repair and maintain costs for every additions job we track, with the trade required and how DIY-friendly each one is.
Verified August 2026
Cost comparison
Typical national figures for a standard single-family home.
| Home Addition InstallationTypical $110,000 · General contractor · DIY 1/5 | $45,000 – $260,000 |
|---|---|
| Sunroom InstallationTypical $42,000 · General contractor · DIY 1/5 | $18,000 – $90,000 |
| Second Story Addition InstallationTypical $190,000 · General contractor · DIY 1/5 | $90,000 – $400,000 |
Home Addition
Variants: Bump-out · Room addition · Second story · Sunroom