Bolthole Index

Fairfax County, Virginia

Zoning, building permits and septic rules in Town of Herndon, Virginia

Town of Herndon is a town in Fairfax County, Virginia. Town of Herndon adopts its own zoning, so inside its limits Town of Herndon’s rules apply, not the county’s. 6 rules below are quoted from official sources and independently re-checked, most recently on October 22, 2026. Rules for unincorporated land are on the Fairfax County page.

Answers from the rulebook for Town of Herndon

Town of Herndon’s own rules

  • Local zoningPresent (with conditions)

    Land inside Herndon town limits; the Town's own zoning ordinance (Town Code Chapter 78) governs land use there

    • Zoning ordinance text is in Chapter 78 of Town Code, hosted on Municode; the Municode text itself was not opened in this run
    • District-level standards not verified in this run
    “the subdivision ordinance is chapter 70 of town code. chapter 78 is the zoning ordinance.”
  • SetbacksSpecified

    Accessory structures (sheds, detached garages, outbuildings) on residential lots inside Herndon town limits; not the principal dwelling

    • Numeric setback values not captured in this run
    “accessory structures such as sheds or detached garages are permitted. there are height, floor area, and setback standards that regulate the size and location of all outbuildings.”
  • Building heightSpecified

    Accessory structures (sheds, detached garages, outbuildings) on residential lots inside Herndon town limits; not the principal dwelling

    • Numeric height limit not captured in this run
    “accessory structures such as sheds or detached garages are permitted. there are height, floor area, and setback standards that regulate the size and location of all outbuildings.”
  • Accessory dwellingsLimited

    Accessory dwelling units (secondary independent units with kitchen and bathroom) on residential lots inside Herndon town limits

    • Maximum of 3 occupants per accessory dwelling unit
    • Town page directs applicants to the accessory dwelling unit process guide for zoning ordinance and application requirements; the process guide was not opened in this run

    maximum occupants: <= 3 persons

    “accessory dwelling units such as accessory apartments, second units, or granny flats are secondary independent units for separate living with a kitchen and bathroom for one or more occupants (maximum 3).”
  • Subdividing landRegulated (with conditions)

    Land divisions inside Herndon town limits

    • Governed by the Town subdivision ordinance, Chapter 70 of Town Code
    • Specific subdivision standards, plat approval steps and fees not verified in this run
    “the subdivision ordinance is chapter 70 of town code. chapter 78 is the zoning ordinance.”
  • Short-term rentalsLimited

    Short-term rental of a dwelling (e.g., via Airbnb or VRBO) inside Herndon town limits

    • Operators must meet all Town requirements and register with the Town
    • Limits apply on the number of nights and the number of people who may be rented to (numeric limits not captured from an official page in this run)
    • Operators must also register with Fairfax County tax administration for payment of the transient occupancy tax
    “there are limits on the number of nights and the number of people that can be rented to.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Herndon or Fairfax County directly.

  • Building permit — New construction permits inside Herndon town limits
  • Owner-builder exemption — Owner-builder permit exemption inside Herndon town limits
  • Building code adopted — Building code adoption inside Herndon town limits
  • Inspections — Building inspections for construction inside Herndon town limits
  • Certificate of occupancy — Certificate of occupancy for new buildings inside Herndon town limits
19 more unanswered
  • Zoning districts
  • Minimum dwelling size
  • Minimum lot size
  • Lot coverage
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Permit fees
  • Permit process

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Town of Herndon publishes no rule on the point, not that none exists. Fairfax County’s page lists the county offices to call.

Off-grid gear

Going off-grid in Town of Herndon means bringing your own water and power. The kit we’d start with:

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