City of Fairfax, Virginia Building Permit Guide

Inside the City of Fairfax, building, electrical, plumbing, mechanical, gas and fire protection permits come from the City’s Office of Code Administration, part of the Fire Department, and are filed online in the City of Fairfax Permit Portal. A new house is charged $0.11 per inspectable square foot under the FY 2027 rates, the minimum permit fee is $93.60, and the City currently reviews building permits within 4 weeks of accepting the application. Addresses outside the city limits belong to Fairfax County, which runs a separate system.

What requires a building permit in the City of Fairfax?

Code Administration’s Permit FAQs list the work that needs a building permit. The list is not exhaustive, and the office answers scope questions on 703-385-7830.

Gas work is treated differently: replacing a gas water heater, stove or range needs a gas permit even when it is like for like. A gas water heater needs a gas permit and a plumbing permit; an electric one needs an electrical permit and a plumbing permit. Solar panels need a building permit and an electrical permit.

Who issues building permits in the City of Fairfax?

The City of Fairfax is an independent city, so Fairfax County does not permit work here. The Office of Code Administration, which shares an office with the Fire Marshal, reviews building plans, issues residential and commercial construction permits and inspects the work. Zoning permits, site plans and architectural review belong to the Department of Community Development and Planning.

Just outside the city line, permits come from Fairfax County Land Development Services through the county’s PLUS system. A Fairfax mailing address does not tell you which side of the line a property is on.

City of Fairfax permit types and the Permit Portal

The Permit Portal takes applications, plan uploads and payments, and lets anyone search records without an account. Applying, paying and requesting inspections need a free account. The City recommends a desktop or laptop rather than a phone or tablet.

Permits for buildings of 4 stories or more are filed as commercial, apart from work inside individual residential units. Record types not yet in the portal, such as the Fire Prevention Code permit, use PDF application packets from the Permit & License Hub.

City of Fairfax permit fees

Building and trade fees are in the Rates & Levies section of the City’s FY 2027 Adopted Budget, in force from July 1, 2026. The Permit Fees page still links the FY 2026 document, so use the FY 2027 budget book for current figures.

Inspectable square footage for a new house is the total of every floor, the basement and the roof. If those add up to 6,000 sq ft, the building permit fee is $660 (6,000 × $0.11). The minimum fee is not refundable once plan review has started or the permit has been issued.

The zoning permit that goes with a building permit is charged separately under the Development and Zoning Fees adopted on May 5, 2026: $50 for residential building construction and $95 for commercial. The City’s August 2026 application guide still mentions a $35 zoning invoice; the adopted fee schedule, in force since July 1, 2026, sets $50.

Electrical, plumbing, mechanical and gas work in the City of Fairfax

After the building permit application is submitted, each trade permit is applied for on its own in the portal, quoting the building record number. Every trade permit has a $93.60 minimum.

Where a stop work order is issued because a trade permit was never obtained, the schedule adds an administrative fee of 200% of the permit fee, up to $250. Fire alarm, sprinkler, standpipe and range hood suppression work needs a fire protection permit, and the Fire Marshal issues Fire Prevention Code permits for uses such as places of assembly, tents and hazardous materials.

City of Fairfax application documents

The City’s how-to-apply guides, updated August 12, 2026, list what to upload. Staff may ask for more or less depending on the scope.

Uploaded plans must be named in the City’s format: address, document type, record type and submission number. For very basic work, drawings may not be required, and a contractor can draw simple changes; larger jobs may need plans from a Virginia-licensed architect or engineer.

Review times: the guides say zoning permits are currently reviewed within 2 weeks of application acceptance and building permits within 4 weeks, and the building permit is not issued until the zoning permit is approved. The Permit Review Metrics page gives up to 3 weeks per residential submission and up to 4 weeks per commercial submission, and publishes six-month averages by permit type.

How to apply: the City of Fairfax process

City of Fairfax building inspections and closeout

The permit holder is responsible for scheduling. In the portal, open the record, choose Inspections, then Request an Inspection, and pick a morning slot (7:00 to 11:30 a.m.) or an afternoon slot (12:00 to 2:30 p.m.). A next-day inspection has to be booked by 3:00 p.m. on the previous business day, and someone must be on site to meet the inspector. You do not have to be the applicant to book, but you do need a portal account.

Building inspections run from footing, foundation, slab and backfill through wind bracing, framing, close-in and insulation to the final. The final building inspection can only be scheduled once every trade permit is finaled, or with the trade finals booked for the same slot.

To cancel, call 703-385-7830, ideally at least 24 hours ahead. Booking an inspection before the work is complete can bring a re-inspection fee, and the fee schedule bills non-compliance inspections (two or more follow-up visits) at $90 per hour per inspector.

New houses: a wall check survey goes to Zoning when the foundation inspection is scheduled, with a height certification if the house will be within 3 feet of the district’s height limit. After construction, a house location survey is submitted and Residential Use Permit inspections by zoning, public works and architectural review staff are booked. The Certificate of Occupancy and Residential Use Permit are issued through the portal once those and the final building inspection pass.

Local City of Fairfax requirements that matter

House grading plan: a new house needs an approved house grading plan, an engineering review coordinated by zoning staff across several departments that the City says often takes several months. The building permit can be filed at the same time but is not issued until the grading plan is approved.

Site plans: a new commercial building needs an approved site plan before its building permit is issued. Minor site plan review is $4,000 and major review $9,000, plus itemized fees.

Land disturbance and stormwater: Public Works inspects erosion and sediment control on any land disturbance over 2,500 sq ft. The erosion and stormwater management fee is $775 for up to half an acre of disturbed land, plus $140 per disturbed acre beyond that.

Floodplain and Resource Protection Areas: a residential floodplain permit that does not need a special exception is $775, and an RPA delineation or determination is $390.

Architectural review and trees: certificates of appropriateness from the Board of Architectural Review and tree removal permits are both filed in the Permit Portal.

Business occupancy: a Commercial Use and Occupancy permit is approved by zoning staff and passed to Code Administration; the Fire Marshal then decides whether a use inspection is needed, typically when the use is changing or the space has not been inspected for 2 years or more.

Pre-construction meetings: projects tied to an approved site plan generally need an on-site pre-construction meeting, requested the same way as an inspection.

Virginia building code

Every Virginia locality enforces the Uniform Statewide Building Code, 2021 edition, in effect since 18 January 2024. No Virginia locality can adopt its own building code or amendments, so what varies locally is zoning conditions, historic districts and flood plain rules. How Virginia’s statewide code works

Official City of Fairfax permit resources

• City of Fairfax Permit & License Hub
• City of Fairfax Permit Portal
• Office of Code Administration
• Permit FAQs: when a permit is needed
• Permit Process Guides: flowcharts and how-to-apply instructions
• Inspections: types and how to request them
• Permit Fees
• FY 2027 Adopted Budget book (Rates & Levies)
• Development and Zoning Fees, FY 2026-27
• Permit Review Metrics

City of Fairfax building permit FAQs

Is the City of Fairfax part of Fairfax County for permits?

No. The city is independent and issues its own permits through the Office of Code Administration at 10455 Armstrong Street. Fairfax County’s PLUS system is only for property outside the city limits.

How much is a building permit in the City of Fairfax?

Under the FY 2027 rates, new houses, decks, garages and porches are $0.11 per inspectable sq ft and new commercial buildings $0.17. Repairs and alterations are $93.60 plus 1% of cost over $1,000, and $93.60 is the minimum for any permit.

How long does plan review take?

The City’s August 2026 guides say building permits are being reviewed within 4 weeks of application acceptance and zoning permits within 2 weeks. A new house also waits for its house grading plan.

Do I need a permit for a shed or a deck?

Every deck needs a building permit. A detached shed, greenhouse or gazebo needs one when it is larger than 256 sq ft.

Do I need a permit to replace a water heater?

For a gas water heater, yes: a gas permit and a plumbing permit, even for a like-for-like swap. An electric water heater is covered by an electrical permit and a plumbing permit.

How do I schedule an inspection?

Log in to the Permit Portal, open the record and request the inspection for a morning or afternoon slot. Requests for the next day close at 3:00 p.m. on the previous business day.

Can a homeowner pull a permit?

Yes. Choose Property/Building Owner as the licensed professional type and upload a signed, notarized Owner Exemption Statement. An owner that is an LLC must name a licensed contractor instead.

Simplify City of Fairfax permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Virginia. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about City of Fairfax permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.