The City's rule
From BSEED's frequently asked questions (read 24 October 2026):
| What BSEED says | What it means for an HVAC job |
|---|---|
| A trade permit is required from BSEED | A new furnace, boiler, AC or heat pump is permit work |
| "Homeowners may apply for a trade permit for single-family structures" | You can pull it yourself on a one-family house |
| Proof of ownership: a driver's license at the permit location, a copy of the deed, or a rental registration if you rent it out | Bring one of these |
| "A contractor is needed when pulling permits for commercial property or multi-family dwellings" | A duplex or apartment needs a licensed mechanical contractor |
| An inspection is requested after the work is done; the Certificate of Acceptance validates the permit | The job is not closed until it passes |
What it costs
From BSEED's fee schedule, effective 1 January 2024 and modified 18 July 2025 (read 24 October 2026):
| Item (gas-fired equipment) | Fee |
|---|---|
| Central heating unit, conversion burner or floor furnace | $203 each |
| Room or wall heater, first unit / each additional at the same address | $130 / $59 |
| Alteration to an existing burner or furnace installation | $148 per unit |
| Hot water tank | $117 each |
| Re-inspection (work not ready, no access) | $176 |
| Failure to obtain a permit, homeowner | $176 per occurrence |
The schedule we read lists no fee line for a new residential split-system air conditioner, so ask BSEED or the contractor what the AC portion will cost.
How to apply and get it inspected
- Create an account in BSEED's online permit portal, Accela Citizen Access. Contractors link their license to the account; BSEED says single-family and duplex owners may also apply in the office.
- Submit the scope of work. BSEED estimates about 15 minutes for the online application and says review and issue "may take from 4 hours for residential structures".
- Do the work, then request the inspection. A pass produces the Certificate of Acceptance.
What 12,989 Detroit HVAC permits show
| Measure | Detroit HVAC permits |
|---|---|
| Issued October 2024 to September 2026 | 12,989 (25% of all permits) |
| October 2024 to September 2025 / October 2025 to September 2026 | 7,501 / 5,488 (27% fewer) |
| City permit type | Mechanical 12,731 (98%), Boiler PV 258 (2%) |
| Busiest / quietest calendar month (index) | April (131) and March (130) / August (69) |
| ZIPs with the most | 48235 (1,149), 48221 (825), 48227 (787) |
Detroit's heating permits peak in March and April and again in October (113), as furnaces get replaced either side of winter; August is the quietest month, so a summer furnace swap meets the shortest queue. Northwest Detroit leads: 48235, 48221 and 48227. Monthly counts are on Detroit HVAC permits, every kind of work on Detroit permit statistics, and the rows on browse Detroit permits.
Before you hire
Look up past permits on the address with the Detroit building permit search guide. A replacement that adds a condenser usually needs an electrical permit too; the rules elsewhere are in do I need a permit to replace my furnace or AC, and filed costs in other cities in HVAC replacement cost.
What this does not tell you
The City's open files carry no permit status, no final inspection date and no value on trade permits, so we show no finished share, no time to final and no cost. The contact business on a trades permit is not always the licensed contractor of record, so we do not rank firms.
How we know this
Rules are quoted from BSEED's frequently asked questions and fees from the BSEED fee schedule effective 1 January 2024 (modified 18 July 2025), both read 24 October 2026. Our counts are the City of Detroit's BSEED Trades Permits layer, read 18 October 2026: mechanical and boiler permits issued October 2024 to September 2026, City of Detroit only.
Numbers come from public permit records in 57 cities, data through October 18, 2026. Nobody paid to be on this page and nobody can.
Questions
- Do I need a permit to replace a furnace in Detroit?
Yes. BSEED says it is unlawful to do construction work in Detroit without a permit, and furnace and AC work is filed as a mechanical trades permit. The City issued 12,989 HVAC permits from October 2024 to September 2026.
- Can a homeowner pull a mechanical permit in Detroit?
Yes, for a single-family house. BSEED's FAQ says homeowners may apply for a trade permit for single-family structures with proof of ownership such as a driver's license, a copy of the deed or a rental registration. Multi-family and commercial work needs a licensed contractor.
- How much is a furnace permit in Detroit?
BSEED's fee schedule (effective 1 January 2024, modified 18 July 2025) lists $203 for each central heating unit, conversion burner or floor furnace, and $148 per unit for alterations to an existing burner or furnace. A re-inspection is $176.
- When is the busiest time for HVAC permits in Detroit?
Spring. In our file April (index 131) and March (130) are the busiest months and August the quietest (69), where 100 is an average month.
- How do I check that my HVAC contractor pulled the permit?
Search the address or permit number in BSEED's Accela Citizen Access site, or filter the Trades Permits dataset on data.detroitmi.gov by street address and look for a Mechanical permit.
Build your own list
Pick your city and the kind of work. Every firm with a permit on record, sorted by what you value.
Related guides
- Albuquerque building permit search: how to look up permits on an address
- Building a casita in Albuquerque: the 750 sq ft limit, rear-yard rule, parking, free plans, and who builds them
- Do I need a permit to build a house in Albuquerque? GB-2 or homeowner, the plan set and the fee
- Do I need a solar permit in Albuquerque? Building and electrical permits, the engineer triggers and the fee
- Do I need a permit to build a new home in Roseville, CA? Plan review, impact fees and 1,690 permits
- Do I need an HVAC permit in Sacramento? Online change-out permits, the fee parts and 8,690 permits
- Buildings Safety Engineering and Environmental Department Frequently Asked Questions — City of Detroit (2026-10-24)
- BSEED Fee Schedule, effective 1 January 2024, modified 18 July 2025 — City of Detroit (2026-10-24)
- City of Detroit Accela Citizen Access (2026-10-24)
- Trades Permits — City of Detroit Open Data (2026-10-18)