The short answer is yes — almost always. If you’re adding, relocating, or modifying ductwork in Las Vegas, a mechanical permit is typically required across Clark County, Henderson, the City of Las Vegas, and North Las Vegas.
Need Ductwork Done Right?
A-Team Climate Control handles permits, inspections, and installation.
Quick Answer (TL;DR)
- Permit required for new ductwork, relocation, or major modification
- Duct leakage test required for new systems
- R-8 insulation required for attic supply ducts
- Permit fees: typically $54–$175
- Penalties: fines, inspection fees, and possible removal of work
Projects That Require a Permit
- Installing new ductwork
- Relocating ducts
- Adding supply or return vents
- Extending ducts to new rooms
- Replacing full duct system
- Ductwork tied to AC installation
Projects That Usually Don’t Need a Permit
- Sealing duct leaks (no layout change)
- Replacing small duct sections (same layout)
- Cleaning ducts
- Replacing vent covers
Duct Leakage Testing
A duct leakage test measures how much air escapes from your duct system.
- Required for new duct systems
- Must pass efficiency standards
- Performed by third-party inspectors
Duct Insulation Requirements
- R-8: Supply ducts in attic
- R-6: Return ducts in attic
- R-6: Ducts in garages or crawlspaces
- No insulation: ducts inside conditioned space
Permit Costs in Las Vegas
- Clark County: $109–$175 typical
- Las Vegas City: $83–$150
- Henderson: $100–$175
- North Las Vegas: varies by project
What Happens If You Skip a Permit?
- Stop-work orders
- Fines up to $4,000
- Inspection fees
- Problems during home sale
- Insurance issues
How to Get a Permit
- Confirm your jurisdiction
- Prepare duct layout and documents
- Submit application online
- Pay permit fees
- Schedule inspections
- Complete duct leakage test
We Handle Everything — Including Permits
A-Team Climate Control manages permits, inspections, and testing so you don’t have to.
