Additions and Conversions · Additions
Second Story Addition Installation Cost, Permits and Who Does the Work
First-time installation of second story addition on a single-family home, typically handled by a general contractor.
Verified August 2026
Typical cost
$190,000
National, standard scope
Range
$90,000 – $400,000
Low to high scope
Trade
General contractor
DIY difficulty 1/5
Permit relevance
98/100
Usually permitted
Do I need a permit for second story addition installation?
Usually yes
Second Story 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 | $90,000 |
|---|---|
| TypicalWhat most homeowners pay | $190,000 |
| High endLarge scope, upgrades or difficult conditions | $400,000 |
| Job type | Project |
| Primary intent | cost |
| Cost varies by location | 81/100 |
Related jobs
Built from the service ontology, not hand-curated link lists.
Cost by state
Labor rates, code adoption and permit fees move this price between states.
Also searched as
These phrasings all map to this one canonical entity.
install second story addition · second story addition installation · new second story addition · second story addition install cost · put in second story addition
Frequently asked questions
How much does second story addition installation cost?
Most homeowners pay between $90,000 and $400,000, with $190,000 typical for a standard single-family job. Figures are modeled national estimates, not quotes.
Do I need a permit for second story addition work?
Yes — in most jurisdictions this job is permitted and inspected. Check your local building department before work starts.
Who does second story addition installation?
A general contractor handles this job. DIY difficulty is rated 1/5 (5 = very DIY friendly).
Does the price change much by location?
Yes. Labor rates, local code requirements and permit fees move this price meaningfully between metros, so we publish local pages for this job.
Coverage status
How far Hometriva expands this entity, and why. Depth follows opportunity, not page-count targets.
| Tier | Tier 2 |
|---|---|
| Depth level earned | Level 4 of 6 |
| Page quality score | 72/100 (improve) |
| Traffic opportunity | 54/100 |
| Localization | 85/100 |
| Calculator potential | 55/100 |
| Troubleshooting potential | 15/100 |
- Level 1: Canonical national pageAlways created — the entity's home in the graph.
- Level 2: Cost, calculator and comparison pagesCalculator potential 55/100, comparison 0/100.
- Level 3: State coverageLocalization 85/100.
- Level 4: Major metro and county coverageCost localization 81/100.
- Level 5: Separate local cost, permit and rule pagesPermit relevance 98/100.
- Level 6: Deep local variants and question pagesReserved for Tier 1 entities where local rules genuinely differ.