Do you need a permit for an AC unit, heat pump, or generator in Alexandria, VA?
It depends on the details of your project.
Outdoor AC units, heat pumps and generators may go in side and rear yards only if they stay at or under 55 dBA at every property line.
Equipment can't sit in the front yard.
Homeowner power-tool work is limited to 7 a.m. to 9 p.m. weekdays and 9 a.m. to 9 p.m. weekends.
A person last checked these rules on October 20, 2026. This is guidance only, so confirm with Alexandria before you build.
Check your exact lot
Your zoning district sets the setbacks, and a flood zone can change the permit answer. Enter your address to see both.
Permits a AC unit, heat pump, or generator can need in Alexandria
| Permit | When it applies |
|---|---|
| Mechanical permit | New heating and cooling systems, and any gas- or oil-fired equipment, need a mechanical permit. |
| Electrical permit | A standby generator and its transfer switch, or a new outdoor unit's circuit, need an electrical permit.Medium confidence |
| Gas piping permit | A gas or propane line needs a fuel-gas permit.Medium confidence |
| Board of Architectural Review approval | In Old and Historic Alexandria or Parker-Gray, exterior work visible from a public way needs a certificate of appropriateness from the Board of Architectural Review, even when no building permit is required. |
Limits that apply citywide
| Placement | Side or rear yard, in the spot with the least impact on neighbors; not the front yard |
|---|---|
| Noise | No more than 55 dBA at any property line (manufacturer data or screening can show this) |
Local details
- Call 811 at least a few days before you dig footings or post holes. Utility locating is free.
- HOA covenants and deed restrictions can be stricter than city rules. Check yours before you build.
How to apply
Common questions
- When does an AC unit, heat pump, or generator need a mechanical permit in Alexandria?
- New heating and cooling systems, and any gas- or oil-fired equipment, need a mechanical permit. Replacing an electric mechanical appliance in a house is exempt from permit in Virginia (USBC 108.2 item 14.4).
- Where do I apply for an AC unit, heat pump, or generator permit in Alexandria?
- Apply through APEX permit portal, or call 703-746-4200.
Sources
- Virginia USBC, 13VAC5-63-80 Section 108.2, Exemptions from application for permit. Checked 2026-10-23
2. One story detached structures used as tool and storage sheds, playhouses, or similar uses, provided the building area does not exceed 256 square feet... 5. Fences of any height unless required for pedestrian safety as provided for by Section 3306 or used…
- City of Alexandria Code Administration, PP 2012-01 When is a permit required (April 12, 2012). Checked 2026-10-20
Other City agencies [Planning and Zoning, Board of Architectural Review, Transportation and Environmental Services, Health Department] may still need to review and approve work even when no building permit is required... For specific requirements, contact t…
- City of Alexandria Zoning Ordinance §§ 7-101, 7-202, 7-801, 7-1101, 7-1102 (Municode, Supp. 103). Checked 2026-10-21
[7-202(A)] Arbors, trellises and pergolas, provided that such structures: (a) Shall not exceed ten feet in height... (c) Shall remain 80 percent open... (10) Walls which do not exceed two feet in height... (12) Structures or mechanical equipment associated …
- City of Alexandria, Noise (City Code § 11-5-4). Checked 2026-10-21
Construction and power equipment: weekdays 7:00 a.m. to 6:00 p.m.; Saturdays 9:00 a.m. to 6:00 p.m.; Sundays prohibited... Homeowner power tools: weekdays 7:00 a.m. to 9:00 p.m.; weekends and holidays 9:00 a.m. to 9:00 p.m.... In residential areas, the nois…