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AC units, heat pumps and generators in Prince George's County, MD

Residential noise is limited to 65 dBA by day (7 a.m. to 10 p.m.) and 55 dBA at night at the receiving property, which covers AC units, heat pumps and generators. New systems and generators need DPIE permits. Gas piping is regulated separately.

A person last checked these rules on October 20, 2026. This is guidance only, so confirm with Prince George's County before you build.

The details

  • Noise limits from Table 27-6810.High confidence
  • Accessory structures over 10 ft tall step back 1 ft per foot of height from side and rear lines.High confidence

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Common questions

Where can outdoor mechanical equipment go in Prince George's County?
Residential noise is limited to 65 dBA by day (7 a.m. to 10 p.m.) and 55 dBA at night at the receiving property, which covers AC units, heat pumps and generators. New systems and generators need DPIE permits. Gas piping is regulated separately.

Sources

  1. Prince George's County Zoning Ordinance §§ 27-6305, 27-6600, 27-6700, 27-6810 (parking, fences, lighting, noise). Checked 2026-10-21
    [Fence and wall height] Within a required front yard, build-to zone, corner lot side yard in front of the principal building: 4 [ft]. Within any other required yard or in corner side yard behind the front plane of the principal building: 6... Security light…
  2. Prince George's County Zoning Ordinance §§ 27-2500 (definitions), 27-5102, 27-5202, 27-5203 (accessory uses). Checked 2026-10-21
    [Family] A group of not more than five individuals all or a part of whom are not related by blood, marriage, adoption, or legal guardianship... Family child care home, small: ...up to eight children... Family child care home, large: ...9 to 12 children... A…

Disclaimer: This is general information, not legal or professional advice for any one property. Codes change. SetbackIQ is not a zoning determination, a permit, or a survey, and it does not replace an architect, engineer, or lawyer. Confirm with your building and zoning offices before you build, buy, or sign a contract.