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Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Fairfax County.

2021 Virginia Uniform Statewide Building Code and 2021 Virginia Statewide Fire Prevention Code: 2021 Virginia Construction, Residential, Existing Building, Maintenance, Energy Conservation, Mechanical, Plumbing, and Fuel Gas Codes; 2020 National Electrical Code; 2021 International Swimming Pool and Spa Code; and 2017 ICC A117.1 accessibility standard, with Virginia amendments. Fairfax local criteria include a 25-psf ground snow load, 24-inch frost depth, and published county wind, seismic, weathering, termite, decay, and ice-barrier design values.

Inspection lane

Schedule or cancel building and trade inspections through PLUS. Requests submitted before 11:59 PM are eligible for the next business day. Related combination inspections must be bundled for the same day; otherwise the inspection may fail and incur a reinspection fee. The applicant and onsite contacts receive an email on the inspection morning with a two-hour arrival window, inspector name, and phone number, followed by the result. Virtual inspections may be requested in the PLUS comments and are allowed at the inspector's discretion.

Minor-work playbook

Understand what may be exempt—and what is not.

Fairfax lists these common residential permit exemptions: non-pool fences; like-for-like windows, doors, and electrical/plumbing/mechanical replacements without relocation; similar-material siding; roof shingles and less than 256 square feet of roof plywood; one-story detached storage sheds no larger than 256 square feet; gutters, cabinets, counters, tile, flooring, paint, and wallpaper; playground equipment; on-grade patios and driveways; concrete or masonry walls no higher than 6 feet; non-tiered retaining walls holding less than 3 feet of earth with no surcharge; temporary ramps no higher than 30 inches; qualifying low-voltage work; flagpoles no higher than 30 feet; and tents under 900 square feet with fewer than 50 persons. Zoning, site, floodplain/RPA, health, and VDOT approvals may still apply.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Schedule or cancel building and trade inspections through PLUS. Requests submitted before 11:59 PM are eligible for the next business day. Related combination inspections must be bundled for the same day; otherwise the inspection may fail and incur a reinspection fee. The applicant and onsite contacts receive an email on the inspection morning with a two-hour arrival window, inspector name, and phone number, followed by the result. Virtual inspections may be requested in the PLUS comments and are allowed at the inspector's discretion.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

Verify contractor ↗

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

Source trail

Official sources for this profile

Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.

Agency websiteOpen official source ↗Permit portalOpen official source ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗Contractor license lookupOpen official source ↗

Project questions

Frequently asked questions for Fairfax County

Who handles permitting for this jurisdiction?

Fairfax County Land Development Services is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.

How should I begin an application?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 703-222-0801.

How long might review take?

Application completeness and sufficiency review is generally completed within 2 business days. Technical review time varies by permit type, completeness, outside-agency reviews, corrections, and workload; Fairfax publishes live residential and commercial building metrics rather than one fixed permit turnaround.

How are inspections scheduled?

Schedule or cancel building and trade inspections through PLUS. Requests submitted before 11:59 PM are eligible for the next business day. Related combination inspections must be bundled for the same day; otherwise the inspection may fail and incur a reinspection fee. The applicant and onsite contacts receive an email on the inspection morning with a two-hour arrival window, inspector name, and phone number, followed by the result. Virtual inspections may be requested in the PLUS comments and are allowed at the inspector's discretion.

Which codes and exemptions should I review?

2021 Virginia Uniform Statewide Building Code and 2021 Virginia Statewide Fire Prevention Code: 2021 Virginia Construction, Residential, Existing Building, Maintenance, Energy Conservation, Mechanical, Plumbing, and Fuel Gas Codes; 2020 National Electrical Code; 2021 International Swimming Pool and Spa Code; and 2017 ICC A117.1 accessibility standard, with Virginia amendments. Fairfax local criteria include a 25-psf ground snow load, 24-inch frost depth, and published county wind, seismic, weathering, termite, decay, and ice-barrier design values. Fairfax lists these common residential permit exemptions: non-pool fences; like-for-like windows, doors, and electrical/plumbing/mechanical replacements without relocation; similar-material siding; roof shingles and less than 256 square feet of roof plywood; one-story detached storage sheds no larger than 256 square feet; gutters, cabinets, counters, tile, flooring, paint, and wallpaper; playground equipment; on-grade patios and driveways; concrete or masonry walls no higher than 6 feet; non-tiered retaining walls holding less than 3 feet of earth with no surcharge; temporary ramps no higher than 30 inches; qualifying low-voltage work; flagpoles no higher than 30 feet; and tents under 900 square feet with fewer than 50 persons. Zoning, site, floodplain/RPA, health, and VDOT approvals may still apply.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.