Bolthole Index

Denton County, Texas

Zoning, building permits and septic rules in Justin, Texas

Justin is a city in Denton County, Texas. Justin adopts its own zoning, so inside its limits Justin’s rules apply, not the county’s. 13 rules below are quoted from official sources and independently re-checked, most recently on November 12, 2026. Rules for unincorporated land are on the Denton County page.

Answers from the rulebook for Justin

Justin’s own rules

  • Local zoningPresent

    Land inside Justin city limits (Unified Development Code, Chapter 52)

    • Uses are allowed only as specified for each zoning district.
    “No land shall hereafter be used, and no building or structure shall hereafter be erected, altered, or converted which is arranged or designed or used for other than those uses specified for the district in which it is located.”
  • Zoning districtsPublished

    Justin city zoning districts SF-RE, SF-1, SF-2, SF-OT, MM, MF, NO, RO, MU, OT, LI

    • Schedule of uses chart: P permitted, PC permitted with design criteria, S specific use permit required, blank not allowed.
    “The schedule of use regulations given below sets forth the allowable use of land and buildings in each of the classified districts.”
  • Minimum lot sizeSpecified

    SF-1 Single-Family Residential-Low district inside Justin city

    • Also minimum lot width 80 ft and depth 100 ft; max 4.0 dwelling units/acre.

    minimum lot area: >= 10000 sq ft

    “Lot dimensions (1) Lot Area (minimum) square feet 10,000”
    One more reviewed finding on this topic
  • SetbacksSpecified

    SF-1 district inside Justin city

    • Interior side 5 ft; alley/private easement rear 8 ft.

    front setback: >= 25 ft · street side setback: >= 8 ft · rear setback: >= 15 ft

    “Setbacks (1) Street, Front (minimum) feet Primary or Secondary Street 25 Local or Private Street 25 (2) Street, Side (minimum) feet All roadways 8 Alleys/private easements 8 (3) Rear (minimum) feet 15”
    One more reviewed finding on this topic
    • Specified — SF-RE district inside Justin city
      “Setbacks (1) Street, Front (minimum) feet Primary or Secondary Street 35 Local or Private Street 35 (2) Street, Side (minimum) feet All roadways 15 Alleys/private easements 10 (3) Rear (minimum) feet 20”
  • Lot coverageSpecified

    SF-1 district inside Justin city

    max lot coverage, all buildings: <= 65 percent

    “Lot Coverage (maximum) Percentage (1) Total of all buildings on the lot 65%”
    One more reviewed finding on this topic
  • Building heightSpecified

    SF-1 district inside Justin city

    • Flag poles up to 25 ft for residential uses; permit needed at 30 ft or larger.

    max building height: <= 35 ft

    “Height (1) Building height (maximum) feet 35”
    One more reviewed finding on this topic
  • Manufactured homesLimited

    HUD-code manufactured housing inside Justin city

    • Chart shows S (specific use permit required) in six districts and blank (not allowed) elsewhere; a footnote 1 applies; manufactured home parks and subdivisions each require S in one district.
    “HUD-code manufactured housing 1 S S S S S S Industrialized housing”
  • Subdividing landRegulated (with conditions)

    Subdivision proposals inside Justin city

    • Flood-related standards shown; full platting rules in the UDC were not reviewed.
    “All subdivision proposals including the placement of manufactured home parks and subdivisions shall have adequate drainage provided to reduce exposure to flood hazards.”
  • Building in a floodplainRequired

    New residential construction in areas of special flood hazard inside Justin city

    • Applies where base flood elevation data has been provided.
    • Engineer, architect or surveyor certification to the floodplain administrator is required.

    lowest floor above base flood elevation: >= 2 ft

    “New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated to two feet above the base flood elevation.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Justin or Denton County directly.

  • Building permit — Building permits inside Justin city
  • Owner-builder exemption — Owner-builder exemption inside Justin city
  • Building code adopted — Building codes inside Justin city
  • Inspections — Building inspections inside Justin city
  • Certificate of occupancy — Certificates of occupancy inside Justin city
16 more unanswered
  • Minimum dwelling size
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Shed and accessory-building permit exemption
  • Driveway access
  • Short-term rentals
  • 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 Justin publishes no rule on the point, not that none exists. Denton County’s page lists the county offices to call.

Off-grid gear

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

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