Land Development Services

Fairfax County, Virginia

CONTACT INFORMATION: Regular hours for calls and emails are 8 a.m. – 4 p.m., Monday through Thursday, and 9:15 a.m. - 4 p.m. on Friday.

TTY 711

12055 Government Center Pkwy
Fairfax, VA 22035

Bill Hicks,

Carport Enclosures

Electric Vehicle Charging Stations

This information is the most common for how to obtain the necessary permits for your project and is not representative of all the conditions you may encounter.


You will be required to obtain a residential addition building permit and an electrical permit. If you are installing new heating and cooling equipment, you will be required to obtain a mechanical permit. If you are installing new plumbing fixtures, you will be required to obtain a plumbing permit.


Standard carport enclosure plans are available from Fairfax County that can be used in lieu of a plan submission during permit application, if you agree to construct the carport enclosure in strict conformance to the standard plans.

Permit Process

Follow the steps below to obtain the necessary approvals and permits for your project. Vienna and Clifton residents require additional approvals from their respective towns. You may obtain the status of your permit application or obtain the status of your plan review, if applicable, at any time online.

  • Step 1) Permit Application

    Permit Application

    Obtain permits online using FIDO. If you are a first-time user, you must first follow the prompts to create an account. Once you are logged into FIDO, apply for a residential addition building permit. Additional steps are required for your ePlan upload process. Once the application is complete, you will be invited by email to upload your required documents to ProjectDox for submission to the county.

  • Step 2) Fees


    Fees vary depending on the scope of your project; use the online fee estimator to help determine your costs.

  • Step 3) County Review

    County Review

    County staff from the Permit Application Center, Health Department (if on septic), Building Plan Review and Zoning will review your package for completeness and compliance with the building code and county ordinances. You will be notified of any deficiencies. Plan corrections, resubmission fees and additional supporting documents may be required.

    Residential Fast Track

    Residential Fast Track allows customers with one-story structures less than 500 square feet to apply for a permit under the fast track process to receive expedited reviews. See our operational status page for more information on review times.

  • Step 4) Permit Issuance

    Permit Issuance

    Once all county reviews are approved and outstanding fees have been paid, you can access your approved plans in ProjectDox and approved permit in FIDO. The permit for the construction of the carport enclosure must be printed and posted at the job site, and the approved plans must be printed in full-size and available on the job site for the duration of the project.

  • Step 4) Trade Permits

    Trade Permits

    Electrical and plumbing permits can be obtained online after the building permit has been issued without the need to submit additional trade related plans. Input the building permit number issued in Step 3 when prompted for the "associated building permit number" in FIDO. If you are installing a new HVAC system, you must upload a Residential HVAC Certification for review prior to issuance of the mechanical permit.


Building Plans

When applying for a permit the plans must meet or show the following, if applicable:

  • Minimum scale of ¼ inch = 1 foot; fully dimensioned.
  • Minimum sheet size: 11 x 17 inches; no pencil.
  • Code year used and local design criteria used for the design.
  • Name, address and occupation of the designer.
  • If prepared by a Virginia registered design professional, show the electronic signature, seal and date.
  • List of materials used, including strength, wood species, grade.
  • Live load and dead load.
  • Foundation plan, footing details. See below for more information.
  • Floor plans with each room function labeled.
  • Details of connections.
  • Typical wall section with sheathing thickness and type.
  • Wind resistance or wall bracing. For more information, see our Wall Bracing publications.
  • Insulation R-values and fenestration U-factors. See our Energy Conservation page.
  • Exterior elevations (front, side and rear) noting window and door dimensions and locations.
  • Manufacturer’s design specifications for prefabricated fireplaces.

Footing Requirements

The building code requires all exterior walls be supported by continuous footings. However, most carports are supported by posts and spread footings. As a result, most conversions require a new slab and footings or underpinning of the existing carport slab. This could add significant cost to your project. To learn more, please read the Typical Carport Enclosure Details.

Using a unique material or product?

You must reference its evaluation report from a nationally recognized listing agency, such as ICC-ES, certifying it meets the requirements of the building code. This is required for products such as pre-made sunrooms, EIFS, adjustable columns and plastic composites.

House Location Plat

Please refer to Submitting House Location Plats for details.


You must notify the county when construction on your project reaches a stage that requires inspection. See the Inspections Timing Checklist below. The county approved site-related plan, building plans and HVAC certification (if applicable) must be available on the jobsite. Any special equipment necessary to perform the inspection, such as ladders, scaffolding or testing equipment, must be on site. For more information on inspection procedures, visit the inspections operational status page. Schedule, cancel or modify an inspection online through FIDO or use the Fairfax County smartphone app available for Android and iOS.

If your new footing or underpinning is constructed in a problem soil, you may need to hire a county-approved licensed professional to perform the foundation inspections. Contact Building Inspections for more information.

Miss Utility

Before you begin excavating for your project, you must first call Miss Utility at 811, TTY 711. Miss Utility is a free service that marks underground utilities.

Inspection Timing Checklist





Residential Addition

  • Footing trench/formwork ready for concrete; bottom of trench on solid soil.

Plumbing groundwork


  • Under-slab sewer and water pipe in place.


Residential Addition

  • Slab area prepared for concrete with gravel, vapor barrier and reinforcing steel in place.

Combined inspection:

  • Building framing
  • Mechanical concealment
  • Plumbing concealment
  • Electrical concealment


  • Vents and gas, sewer and/or water pipe installed and pressure tested.
  • Electrical wiring and boxes installed.
  • Ductwork installed.
  • Sill plates secured to the foundation.
  • Structure weather tight.
  • Wall sheathing installed.
  • Windows and doors installed.


Residential Addition

  • Wall, ceiling and floor insulation in place.

Combined inspection:

  • Building final
  • Mechanical final
  • Plumbing final
  • Electrical final


  • Plumbing fixtures and piping installed.
  • Appliances, fixtures, outlets, panels, switches, etc. installed.
  • HVAC equipment operating properly.
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