Permit Breakdown
- Building permit$—
- Electrical permit$—
- Plumbing permit$—
- Mechanical permit$—
- Plan review fees$—
- Inspection fees$—
- Estimated total$—
Likely Required
Typical Permit Cost Ranges
| Project | Typical permit cost |
|---|---|
| Fence | $50 – $300 |
| Shed | $100 – $500 |
| Deck | $100 – $800 |
| Water heater | $50 – $200 |
| Roofing | $100 – $500 |
| HVAC / electrical | $75 – $400 |
| Room addition | $500 – $3,000+ |
| Basement finish | $200 – $1,500 |
How Much Do Building Permits Cost?
Permit costs are one of the least understood parts of a home project, and they are easy to forget until the building office sends a bill. Most building permits are based on the construction value of the work, commonly a base fee plus roughly one to one-and-a-half percent of the project value, with separate charges for electrical, plumbing, and mechanical permits, plan review, and inspections. This planner takes your project, value, and location, then estimates each permit category, the inspection fees, a low-to-high range, and how long review typically takes, so both the money and the time land in your budget.
What Permits Does Your Project Need?
Different projects trigger different permits. A deck or shed usually needs only a building permit and an inspection, while a garage adds electrical, and a room addition or basement finish can pull building, electrical, plumbing, and mechanical permits plus a plan review. Trade-only work like an HVAC swap, a water heater, or an electrical service upgrade needs the matching trade permit rather than a full building permit. Toggle the categories above to match what your job actually involves.
Permits, Inspections, and Review Time
The permit is permission to build; inspections confirm the work meets code, and they are billed separately, often several per project. Review time matters too: a simple deck permit may clear in a couple of weeks, while an addition can take a month or more, and that delay is part of the real cost of a project. Building the fees and the timeline into your plan up front is far better than discovering them halfway through, when the work, and your patience, are already underway.
Frequently Asked Questions
Do I need a permit? Usually yes for structural, electrical, plumbing, mechanical, roofing, and addition work; cosmetic work often does not.
How much do permits cost? Often $50 to $300 for small jobs and $500 to $3,000 or more for additions, depending on value and location.
What happens if I skip permits? Possible fines, stop-work orders, tear-outs, trouble selling, and denied insurance claims; the risk rarely pays off.
How long does permit review take? From about a week for simple permits to a month or more for additions and plan-reviewed work.