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Building & Trade Permits
When Are Building Permits Required?

Building permits are required for all of the following:

  • All new buildings over 6'-0" in height regardless of floor area, including sheds. (Separate buildings require separate permits.)
  • Additions to existing structures.
  • Interior alterations to kitchens, bathrooms,
    basements and attics, etc.
  • Exterior alterations
    • Roof shingle replacement exceeding 25% of existing roof area
    • Replacement of wall siding: stucco, shingles etc.
    • Installation of replacement windows
  • Demolish or relocate a building.
  • Change the occupancy classification of a building
  • Move a lot line that affects an existing structure
  • Outdoor Swimming pools (in-ground & above ground)
  • Outdoor Spas, hot tubs, etc.
  • Tennis courts
  • Signs
  • Special events (Tents, fairs, carnivals, etc.;)
  • Exterior decks
  • Structures over 6'-0" in height including:
    • Fences
    • Walls (free standing)
      Retaining Walls over 3 feet in height

The following are exempt from building permits:

  • Fences not over 6 feet in height.
  • Retaining walls not over 3 feet in height, unless supporting a surcharge or impounding Class I, II or III-A liquids.
  • Water tanks supported directly on grade if the capacity does not exceed 5,000 gallons and ration of height to diameter or width does not exceed 2 to 1.
  • Sidewalks, driveways and on-grade concrete or masonry patios not more than 30 inches above adjacent grade and not over any basement or story below and which are not part of an accessible route.
  • Painting, papering, tiling, carpeting, cabinets, countertops and similar finish work not involving structural changes or alterations.
  • Temporary motion picture, television and theater stage sets and scenery.
  • Prefabricated swimming pools accessory to a Use Group R-3 occupancy, as applicable in Section 101.2, which are less than 24 inches deep, do not exceed 5,000 gallons and are installed entirely above ground.
  • Shade cloth structures constructed for nursery or agricultural purposes and not including service systems.
  • Swings and other playground equipment.
  • Window awnings supported by an exterior wall which do not project more than 54 inches from the exterior wall and do not require additional support of Group R-3.
  • Movable cases, counters and partitions not over 5 feet 9 inches in height and not containing any electcrical, plumbing or mechanical equipment.
  • Portable grandstands or bleachers providing seating for fewer than 100 persons when located outside of a building.
  • Ordinary repairs:

Permits are not required for ordinary repairs. The following are NOT considered ordinary repairs and DO require permits:

  • Cutting away of any wall partition or portion thereof
  • Removal or cutting of any structural beam or load bearing support
  • Removal or change of any required means of egress
  • Rearrangement of parts of a structure affecting egress requirements
  • Addition, alteration, replacement, or relocation of any of the following:
    • Standpipe
    • Water supply
    • Sewer line
    • Drainage pipe
    • Drain leader
    • Gas line
    • Soil, waste or vent piping
    • Electric wiring
    • Mechanical work

Trade permits are required for the following work:

  • Electrical work including:
    • High voltage wiring
    • Low voltage wiring
      • Alarm system
      • Telephone systems
      • Computer systems
      • Fire alarm systems
      • Audio visual systems

    • Services (new, changed, or temporary)
    • Control wiring for boiler/furnace/AC units
    • Generators

  • Plumbing work including:
    • Water distribution (including water main)
    • Waste and vent systems
    • Sprinkler systems
    • Gas piping
    • Fire extinguishing systems (kitchen hood)

  • HVAC work including:
    • Heating systems
    • A/C and refrigeration systems
    • Duct work
    • Commercial kitchen hood systems (including ductwork)
    • Oil and propane tanks
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Town Hall - 101 Field Point Road, Greenwich, CT 06830. Phone: (203) 622-7700. Copyright © , Town of Greenwich. All rights reserved.