The crane is booked. The street closure is not.
A boiler dies on a Tuesday in January, and the building stays cold until a permit says the new one can fire. We take the mechanical permit, the gas piping, and the street closure that lets the truck park.
Call and talk to a permit specialist — scoped to mechanical & hvac.
What your projects run into
- Mechanical permits for change-outs and new systems
- Fuel gas piping permits for furnaces, boilers, and rooftop units
- Boiler and pressure vessel certificates and state inspection
- Structural review for rooftop unit weight and curb
- Crane lift and street closure permits for the set
- Energy code compliance documentation at submission
- Ventilation and make-up air approval on commercial work
- HVAC contractor licensing and registration by jurisdiction
Where the time goes
- A closure permit that has to clear a traffic review before the crane date can be confirmed with the customer
- A rooftop change-out that turns into a structural review because the new unit outweighs the one on the curb
- No heat in January, a new boiler on the pad, and no permit that lets it fire
Each of those is days or weeks on a calendar you don't control. Handled early, most of them never happen.
We are not an equipment vendor with a permit desk attached. Nobody here has a brand to move or a spec to influence — the filing follows the tonnage you already sold.
Straight answers
Do I need a permit to replace a rooftop unit?
Yes, and rarely just one. A change-out can pull a mechanical permit, a gas piping permit, an electrical disconnect, and a structural check the moment the replacement is heavier than what came off. Which of those attach is a county answer, and it is a short call before the customer gets a date.
Can emergency replacements start before the permit issues?
Some jurisdictions allow an emergency change-out with the permit filed immediately after; others do not, and the inspection happens either way. Which rule applies is a call to make before the tech is on the roof.
What holds up mechanical permits most often?
The unit is rarely the problem; the paperwork riding with it is. Energy code documentation, gas sizing, and rooftop weight each land with a different reviewer, and a set that goes in short on any one of them comes back as a comment letter rather than a phone call. That is the pass we make before anything is filed.
Call and talk to a permit specialist
(240) 344-5075Ten minutes on your project. You leave with the permits and licenses it needs, in order, with the clocks that run on each.