How Fees Work
Most states use one of two fee models: flat fees (a fixed amount regardless of job size) or valuation-based fees (a percentage of the estimated project cost). Flat-fee states tend to be cheaper for larger jobs; valuation-based states can be unpredictable. In both cases, the fee is typically the contractor's responsibility — but it's passed on in their quote.
National Fee Overview
For a standard residential HVAC replacement (central AC or furnace, 1-for-1), here is the fee landscape nationally:
- Low range ($50–$100): Rural counties in states like Tennessee, Arkansas, Missouri, and parts of the Southeast using flat-fee schedules
- Mid range ($100–$200): Most suburban jurisdictions including Boone County KY ($105), most Florida counties, most Texas cities, standard Ohio counties
- High range ($200–$400+): Large urban jurisdictions — Los Angeles, San Francisco, Seattle, Boston, New York City — that use valuation-based fees or have high base rates
State-by-State Fee Reference
| State | Fee Model | Typical Residential Replacement Fee | High-End Jurisdiction | Notes |
|---|---|---|---|---|
| Kentucky | Flat / local | $75–$150 | Louisville: varies | Boone County: $105 flat. Most local programs use similar flat-fee schedules. |
| Ohio | Valuation-based / local | $80–$180 | Columbus: $150+ | Cincinnati fees based on project valuation. Hamilton County flat ~$90–$120. |
| Florida | Valuation-based / local | $100–$250 | Miami-Dade: $200+ | Florida permits include state surcharge (2.5% of fee). County base rates vary widely. |
| Texas | Valuation-based / local | $75–$175 | Austin: $150+ | No permit required in some rural areas. Houston flat ~$100. Dallas valuation-based. |
| California | Valuation-based | $150–$400 | San Francisco: $300–$500 | Los Angeles: $150–$250 for standard replacement. SF plan check adds significant cost. |
| Georgia | Flat / local | $75–$150 | Atlanta: $150+ | Fulton County (Atlanta) uses valuation-based; most other GA counties use flat fees. |
| Tennessee | Flat / local | $50–$125 | Nashville: $100–$150 | Many rural TN counties have low flat fees. Nashville Metro uses valuation-based. |
| North Carolina | Flat / local | $75–$150 | Charlotte: $125–$175 | NC building departments set fees locally. Mecklenburg County (Charlotte) higher due to volume surcharges. |
| Virginia | Valuation-based / local | $80–$175 | Fairfax County: $200+ | Northern Virginia (Fairfax, Arlington, Loudoun) fees significantly higher due to high project valuations. |
| Washington | Valuation-based | $100–$250 | Seattle: $250+ | Washington State requires additional state surcharge (0.5%). Seattle permits among highest in nation. |
| Colorado | Flat / local | $75–$200 | Denver: $150–$200 | Denver uses flat mechanical permit fees. Some Front Range municipalities use valuation-based. |
| Michigan | Valuation-based / local | $80–$175 | Detroit: $150+ | Michigan requires state construction code fee surcharge (1% of permit fee minimum). Adds to base cost. |
| Indiana | Local only | $50–$150 | Indianapolis: $100–$150 | No statewide fee schedule. Marion County (Indianapolis) uses flat fees for residential HVAC. |
| Arizona | Valuation-based / local | $100–$200 | Phoenix: $150–$250 | Maricopa County and Phoenix use valuation-based plus technology surcharges. Online portal system. |
| Nevada | Valuation-based / local | $100–$200 | Las Vegas: $150–$250 | Clark County (Las Vegas) uses valuation-based. Online permit portal widely used. |
What Drives Fee Differences
The biggest factors in permit fee variation are:
- Fee model: Valuation-based fees make high-cost urban areas expensive; flat-fee rural counties are predictable and low
- State surcharges: Florida charges a 2.5% state surcharge on all building permit fees. Michigan and Washington have their own surcharges. These are on top of the local base fee.
- Technology fees: Many jurisdictions now charge a portal/technology surcharge of $5–$25 per permit for online processing systems
- Re-inspection fees: Most jurisdictions offer one free re-inspection. Additional re-inspections typically cost $50–$100 each.
FAQ — Permit Fees
Should my contractor itemize the permit fee in their quote?
Yes — this is good practice and you should ask for it. If permit fees are buried in a lump-sum quote, you have no way to know whether a permit was actually pulled. Ask for the permit fee to be listed as a separate line item. If a contractor quotes you $175 for "permit and inspection" in Boone County KY where the actual fee is $105, the $70 difference is profit markup — not unreasonable, but worth knowing.
Do I pay the permit fee or does my contractor?
The contractor pays the fee at the time of application — they are the permit applicant in most states. The cost is then passed on to you in their quote. As the homeowner, you don't typically interact with the building department's payment process unless you're pulling your own permit.
What is a re-inspection fee?
If your installation fails its first inspection, a re-inspection is required after the issue is corrected. Most jurisdictions provide one free re-inspection. After that, each additional re-inspection typically costs $50–$100. In most cases, re-inspection fees are the contractor's responsibility since a failed inspection is typically due to a workmanship issue.
Disclaimer: Fee data is based on publicly available building department fee schedules as of May 2025. Fees change and vary by specific project. Always verify the current fee with your local building department before relying on estimates from this guide.