Fairfax County, VA Building Safety: Building Permits (2026)
Key Facts
- Covers
- single-family, multi-family, commercial structures
- Separate permits
- electrical, mechanical, plumbing, fire systems
- Governing code
- Virginia USBC + County Code Ch. 61
- Issuing office
- Building Official
Summary
Fairfax County requires a building permit to construct, improve, or alter single-family dwellings, multi-family dwelling units, shopping-center spaces, warehouse bays, condo units, and any other commercial or residential structure.
(c)A building permit shall be issued to construct, improve or alter the following:1.Each single-family attached or detached dwelling.2.Dwelling units and common interior areas in a multiple-family dwelling.3.Each space within a strip shopping center, and each warehouse bay in a strip warehouse.4.Each unit and interior common area in a condominium office building.5.Each commercial or residential structure not addressed above. Separate electrical, mechanical, plumbing, fire alarm, fire suppression and fire lane permits are required to install or alter electrical, mechanical, plumbing, fire alarm, fire suppression and fire lane equipment in dwelling units, structures or areas of a structure for which a separate building permit has been issued.
Full Breakdown
The Virginia Uniform Statewide Building Code applies in Fairfax County, and the county's own fee section spells out that a building permit must be issued for essentially every category of structure, from a single-family house to a warehouse bay, before construction, improvement, or alteration begins. Separate permits are required for electrical, mechanical, plumbing, fire alarm, fire suppression, and fire lane work.
Violations & Fines
No permit fees may be collected, and no permit issued, until required fees are paid; work done without the required building permit is enforceable under the USBC and County Code, including civil penalties under Chapter 61.
Frequently Asked Questions
Do I need a permit to build an addition in Fairfax County?
Are electrical and plumbing work covered by the same building permit?
Sources & Official References
Other rules in Fairfax County
Compare Fairfax County to another location·View the Virginia building safety overview
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