Maryland / Prince George's County
HVAC Permit in Prince George's County, Maryland
It depends
Sometimes, depending on the project
Before installing or replacing a furnace, boiler, heat pump, central air conditioner, electronic air cleaner, humidifier or attic fan. Portable and window units connected by cord and plug need no permit.
Issued byPrince George's County Department of Permitting, Inspections and Enforcement (DPIE)
By Mario Bailey, verified against official sources
Quick answer
Permanently installed heating and cooling equipment requires a Mechanical Permit in Prince George's County, and the same jobs usually require an Electrical Permit as well, while gas-fired equipment adds a WSSC gasfitting permit. The county's published exemptions are narrow and portability-based: portable heating appliances, portable ventilation equipment, portable cooling units and portable evaporative coolers, plus one-to-one in-kind replacement of household appliances such as a stove, refrigerator, washer or dryer. DPIE's own chart makes the same point from the other side, marking a window air conditioner as needing no permit with the footnote that a cord and plug connection does not require a permit. Only a Maryland-licensed Master HVACR contractor may register for and pull a mechanical permit; homeowners cannot.
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When a permit is usually needed
Before installing or replacing a furnace, boiler, heat pump, central air conditioner, electronic air cleaner, humidifier or attic fan. Portable and window units connected by cord and plug need no permit.
What an HVAC permit costs in Prince George's County
How Prince George's County compares in Maryland
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Baltimore County | It depends | Before installing ductwork in a dwelling that has none or adding ductwork not covered by... |
| Howard County | It depends | For new HVAC installations, fuel or energy source conversions, additions or alterations... |
| Montgomery County | Permit required | Any size |
| Prince George's Countythis page | It depends | Before installing or replacing a furnace, boiler, heat pump, central air conditioner... |
How to apply in Prince George's County
In Prince George's County, a residential HVAC (mechanical) permit application must identify the covered equipment and scope of work, since installing, altering, or replacing a heating or cooling system is regulated work that cannot start until the application is submitted and the permit issued. The equipment itself must be picked by a real sizing calculation rather than a rule of thumb.
What most HVAC permit applications include:
- For Prince George's County, a mechanical permit is required before anyone may install, alter, repair, remove, convert, or replace a heating, ventilating, or air conditioning system regulated by the code, and the work may not begin until the application is submitted and the permit is issued (IRC R105.1).
- For Prince George's County, the application identifies the specific equipment being installed, such as a furnace, heat pump, or air conditioner, since the unit must be installed according to its listing and the manufacturer's installation instructions (IRC M1401.1).
- For Prince George's County, the proposed equipment location must leave the clearances needed to clean coils and replace filters, blowers, motors, and controls after installation (IRC M1401.2).
- For Prince George's County, the application carries the equipment sizing basis: ACCA Manual J building loads and Manual S equipment selection, or another approved sizing method, not a rule of thumb (IRC M1401.3).
- For a split system, the work covered by the permit includes refrigerant suction line insulation, since the piping is inspected against that standard once installed (IRC M1411.6).
General submittal guidance from International Residential Code (IRC), 2021 edition, Chapter 1 (Permits) and Chapter 14 (Heating and Cooling Equipment and Appliances). Source. Prince George's County Department of Permitting, Inspections and Enforcement (DPIE) sets the exact checklist for Prince George's County.
Where to apply in Prince George's County:
Prince George's County Department of Permitting, Inspections and Enforcement (DPIE)
- 9400 Peppercorn Place, Largo, MD 20774
- Phone: 301-636-2000
- Email: dpiebprd@co.pg.md.us
HVAC Permit in Prince George's County compared with nearby Maryland localities
| Locality | Permit needed? | Threshold | What each Maryland schedule says | Verified |
|---|---|---|---|---|
| Prince George's County | It depends | Before installing or replacing a furnace, boiler, heat pump, central air conditioner... | ...line item "Mechanical Permit - Commercial/Residential", minimum permit fee $86:... | |
| Baltimore County | It depends | Before installing ductwork in a dwelling that has none or adding ductwork not covered by... | ...07/01/26 prices Mechanical, HVAC System Only for commercial work only ($100.00... | |
| Howard County | It depends | For new HVAC installations, fuel or energy source conversions, additions or alterations... | $50 non-refundable application fee | |
| Montgomery County | Permit required | Any size | Mechanical Permit minimum fee $80.84 for a residential one or two family dwelling... |
Inspections and closing out your permit
In Prince George's County, mechanical work gets a rough in inspection after the ductwork, refrigerant lines, and gas piping are in but before they are covered or concealed, followed by a final inspection that confirms the equipment operates correctly and its clearances, combustion air, and condensate disposal are in place. A straight equipment changeout with no new ductwork commonly gets a single final inspection instead of a separate rough in trip.
- In Prince George's County: rough inspection of the mechanical and gas systems must be made before the work is covered or concealed, before fixtures or appliances are set or installed, and before the framing inspection (IRC R109.1.2).
- In Prince George's County: where a cooling coil is added to an existing warm air furnace, the rough in confirms the coil is not installed upstream of the heat exchanger unless the furnace is listed for it, and that the blower can handle the added static pressure (IRC M1411.2).
- In Prince George's County: the rough in and final both confirm the appliance access opening and working space are large enough to service the unit (IRC M1305.1).
- In Prince George's County: at final inspection, the inspector verifies the equipment has adequate combustion air, with openings kept clear for the distance the code requires (IRC M1402.3).
- In Prince George's County: final inspection also checks that the condensate line drains to an approved point of disposal with the required slope and does not create a nuisance (IRC M1411.3).
- In Prince George's County: for a straight equipment changeout with no new ductwork, many permit offices require only a single final inspection, while a new installation still gets a rough in inspection before the final (common local inspection practice).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Prince George's County permit portal or by phone at 301-636-2000.
Inspection sequence from International Residential Code (IRC), 2021 edition, Section R109 (Required Inspections) and Chapter 14 (Heating and Cooling Equipment and Appliances). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your HVAC Permit checklist for Prince George's County
- Confirm the requirement. Sometimes, depending on the project. Usually needed: Before installing or replacing a furnace, boiler, heat pump, central air conditioner, electronic air cleaner, humidifier or attic fan. Portable and window units connected by cord and plug need no permit.
- Budget the fee. DPIE Fee Schedule, effective March 2, 2025, line item "Mechanical Permit - Commercial/Residential", minimum permit fee $86: "Total Fee = Administrative Fee $66 + Mechanical Fee ($86 or 1.3% of Mechanical Construction Cost, whichever is greater). Plus Technology Fee 10%." The companion electrical permits are priced separately at "Electrical Permit Fee - Heating Equipment Unit" $50 and "Electrical Permit Fee - A/C Equipment Unit" $50, each plus the $66 administrative fee and the 10% technology fee. Official fee schedule.
- Apply. In Prince George's County, a residential HVAC (mechanical) permit application must identify the covered equipment and scope of work, since installing, altering, or replacing a heating or cooling system is regulated work that cannot start until the application is submitted and the permit issued. The equipment itself must be picked by a real sizing calculation rather than a rule of thumb. Start at the Prince George's County permit portal.
- Keep the office details handy. Prince George's County Department of Permitting, Inspections and Enforcement (DPIE). Phone: 301-636-2000. Address: 9400 Peppercorn Place, Largo, MD 20774.
- Plan for inspections. In Prince George's County, mechanical work gets a rough in inspection after the ductwork, refrigerant lines, and gas piping are in but before they are covered or concealed, followed by a final inspection that confirms the equipment operates correctly and its clearances, combustion air, and condensate disposal are in place. A straight equipment changeout with no new ductwork commonly gets a single final inspection instead of a separate rough in trip.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need an HVAC permit in Prince George's County?
- Permanently installed heating and cooling equipment requires a Mechanical Permit in Prince George's County, and the same jobs usually require an Electrical Permit as well, while gas-fired equipment adds a WSSC gasfitting permit. The county's published exemptions are narrow and portability-based: portable heating appliances, portable ventilation equipment, portable cooling units and portable evaporative coolers, plus one-to-one in-kind replacement of household appliances such as a stove, refrigerator, washer or dryer. DPIE's own chart makes the same point from the other side, marking a window air conditioner as needing no permit with the footnote that a cord and plug connection does not require a permit. Only a Maryland-licensed Master HVACR contractor may register for and pull a mechanical permit; homeowners cannot. Always confirm with the Prince George's County Department of Permitting, Inspections and Enforcement (DPIE) before starting.
- How much does an HVAC permit cost in Prince George's County?
- DPIE Fee Schedule, effective March 2, 2025, line item "Mechanical Permit - Commercial/Residential", minimum permit fee $86: "Total Fee = Administrative Fee $66 + Mechanical Fee ($86 or 1.3% of Mechanical Construction Cost, whichever is greater). Plus Technology Fee 10%." The companion electrical permits are priced separately at "Electrical Permit Fee - Heating Equipment Unit" $50 and "Electrical Permit Fee - A/C Equipment Unit" $50, each plus the $66 administrative fee and the 10% technology fee. See the official fee schedule for current amounts.
- Where do you apply for an HVAC permit in Prince George's County?
- You can apply through the Prince George's County permit portal or contact the Prince George's County Department of Permitting, Inspections and Enforcement (DPIE) directly. The links are listed on this page.
- Can a homeowner pull an HVAC permit themselves in Prince George's County?
- Under Maryland law (Md. Code, Bus. Occ. and Prof. 12-301(b), 6-607(1); Public Safety 12-505): It depends on the trade and the county. Plumbing: state law exempts an individual who personally provides plumbing services in their own residence, but homeowners may not make final connections between the residence and public or private water supply or disposal systems, and Baltimore County plus the WSSC-area counties are largely carved out of the state plumbing title. Electrical: the Maryland Electricians Act prohibits providing electrical services for compensation without a license; it has no express homeowner exemption, so uncompensated work on one's own home falls outside the licensing prohibition, but each county decides whether it will issue an electrical permit to an unlicensed homeowner. Building permits are issued by local jurisdictions, which set their own owner-applicant rules. Confirm how Prince George's County applies this before you apply.
From the Library
What else needs a permit in Prince George's County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | Permit required | Any size | ...effective March 2, 2025, line item "Deck or Pergola", minimum permit fee $151.00:... |
| Electrical Permit | Permit required | Any size | ...work by item: "Electrical Permit Fee - Rough Wire Outlet, Segment of 15"... |
| Fence Permit | It depends | fence height above grade, with a permit required at any height on a corner lot, in a historic or protected area, or in the 100-year floodplain | ...effective March 2, 2025, line item "Fence - Residential", minimum permit fee $145:... |
| Patio Permit | It depends | area of an at-grade patio, with a permit required at any size if stairs or ramps are built due to elevation change | ...March 2, 2025, line item "Patio - Residential > 500 Sq Ft", minimum permit fee... |
| Plumbing Permit | It depends | Before installing new plumbing or natural gas piping, before replacing a water heater... | See schedule |
| Pool Permit | It depends | prefabricated pools accessory to one- and two-family dwellings that are installed entirely above ground, hold no more than 5,000 gallons, and have a four-foot fence around the pool perimeter | ...March 2, 2025: "Swimming Pool (In-ground) - Residential", minimum permit fee $297... |
| Roof Replacement Permit | It depends | Before replacing roof sheathing or plywood, or doing any roof work that involves... | ...Residential" to "Alteration/Repair without U&O - Exterior", minimum permit fee... |
| Shed Permit | It depends | floor space of a one-story detached accessory structure, and only one such exempt structure is allowed per property | DPIE Fee Schedule, effective March 2, 2025, line item "Shed > 150 Sq Ft", $1.17 per SF:... |
| Solar Permit | Permit required | Any size | ...2, 2025: "Solar Panels (Roof-mounted) - Residential", minimum permit fee $158... |
HVAC Permit in other Maryland localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Prince George's County documents; the office above sets the local rules.
How this HVAC permit page for Prince George's County was verified. 2 official sources: princegeorgescountymd.gov, princegeorgescountymd.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Prince George's County Department of Permitting, Inspections and Enforcement (DPIE). Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page