Swimming pool rules in Chatham, Massachusetts
Allowed with a permit
Yes. Chatham's zoning bylaw allows a swimming pool as an accessory use in all residential districts, but the pool, its enclosure and its pump equipment must meet the full building setbacks for your district. New pools are prohibited within 50 feet of a wetland without a Conservation Commission variance, and you'll need a building permit and a state-code safety barrier.
| Allowed in residential districts | Yes, as an accessory use [2] |
| Pool and enclosure setbacks | Same as buildings (district street, abutter and conservancy setbacks) [3] |
| Abutter setback (R60/R40; R40A; R30/R20/R20A) | 25 ft; 40 ft; 15 ft [4] |
| Pumps, heaters, other equipment | Must meet building setbacks unless the ZBA grants a special permit [5] |
| Near wetlands | New pools prohibited within 50 ft without a variance [6] |
| What counts as a pool | Any in-ground or above-ground pool; portable pools over 2 ft deep and 15 ft across [1] |
Pools are a permitted accessory use
Chatham's Protective Zoning Bylaw defines a swimming pool to include any permanent in-ground or above-ground pool. It also covers any portable pool more than 2 feet high or deep and 15 feet long or across [1]. Pools are listed as permitted accessory uses in the residential districts [2].
Setbacks and lot coverage
- Pools, tennis courts and their enclosures must meet the same street, abutter and conservancy setbacks as buildings [3].
- Appendix II's table sets setbacks of 40 feet from the road and 25 feet from abutters in R60 and R40, 40 and 40 feet in R40A, and 25 and 15 feet in R30, R20 and R20A [4]. In R60 and R40, lots that existed before May 1987 use 30 feet from the road and 20 feet from abutters instead [9].
- Pool pumps, filters, heaters and other exterior mechanical equipment must also meet the building setbacks unless the Zoning Board of Appeals grants a special permit [5].
- Pools count toward lot coverage (the share of upland covered by buildings, driveways, pools, decks and other structures) [7], but not toward building coverage.
Near wetlands and the shore
The Conservation Commission's regulations prohibit new swimming pools within the 50-foot No Disturb Zone of a wetland resource area unless a variance is granted [6]. A pool within 100 feet of a wetland, bank, beach or pond, or 200 feet of a river, needs a Conservation Commission permit. In a Conservancy District, even submerged pipes serving a pool need a ZBA special permit [8].
Permits and safety barriers
You'll need a building permit from the Building Division, with a plot plan showing the pool and its setbacks. The local sources we reviewed don't add their own fence or barrier rules. The state building code's pool-barrier requirements apply (see below), including for spas and hot tubs.
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Next steps
- Get a plot plan showing the pool, fence/enclosure and equipment pad with distances to every property line and any wetland or shore.
- If any part is within 100 feet of a wetland, pond, marsh or the shore, file with the Conservation Commission first.
- Apply for a building permit (plus electrical and any gas permits) with the Chatham Building Division (508-945-5168).
- Install a code-compliant barrier (at least 48 inches, self-closing and self-latching gates) before filling the pool.
Common questions
- Do I need a permit for a pool in Chatham, Massachusetts?
- Yes. You need a building permit from the Building Division with a plot plan. A pool within 100 feet of a wetland, bank, beach or pond, or 200 feet of a river, also needs a Conservation Commission permit.
- How far must a pool be from the property line in Chatham, Massachusetts?
- Pools and their enclosures must meet the same setbacks as buildings. The abutter setback is 25 feet in R60 and R40, 40 feet in R40A and 15 feet in R30, R20 and R20A. Equipment must meet them too unless the ZBA grants a special permit.
- Do I need a fence around a pool in Chatham, Massachusetts?
- The local sources add no fence rules of their own, but the state building code's pool-barrier requirements apply, including a barrier at least 48 inches high with self-closing, self-latching gates.
- Can I build a pool near wetlands in Chatham, Massachusetts?
- New pools are prohibited within the 50-foot No Disturb Zone of a wetland resource area unless the Conservation Commission grants a variance.
Massachusetts building code rules for pools
Under the State Building Code (780 CMR, 10th edition), residential pools, spas and hot tubs must meet the 2021 International Swimming Pool and Spa Code (ISPSC) as adopted in Massachusetts.
Permits:
- A building permit is needed for any pool except prefabricated pools under 24 inches deep.
- Plans for in-ground pools must be prepared by a registered design professional (an engineer or architect).
- Wiring must meet the Massachusetts Electrical Code (527 CMR 12.00), and gas pool heaters must meet the state plumbing and gas code (248 CMR).
Barrier (fence) requirements (ISPSC §305):
- The barrier must be at least 48 inches high, measured on the side away from the pool.
- The gap under the barrier can be no more than 2 inches over grass or gravel, or 4 inches over concrete.
- Pedestrian gates must open outward away from the pool, be self-closing and self-latching, and be able to take a lock.
- If a house wall forms part of the barrier, doors and low windows opening to the pool need an audible alarm (or another listed option).
- In-ground pool construction sites need temporary fencing at least 4 feet high from excavation until the permanent barrier is up.
- Spas and hot tubs with a lockable safety cover meeting ASTM F1346, and pools with a powered safety cover meeting that standard, are exempt from the barrier rules.
Local zoning still controls pool setbacks, and wetlands rules may apply near water.
What the bylaw says
- Sec. II Definitions, 107. Swimming Pool, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 19
“SWIMMING POOL” means a pool designed and built for swimming purposes as an accessory use to a principal permitted use, for use primarily by the occupants or tenants of said property. The term includes any permanent under or above-ground pool and any portable pool more than two (2) feet in height or depth and fifteen (15) feet in length or diameter.
- Sec. III.C.1 Residential Districts, Accessory Uses, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 22
ACCESSORY USES: Barn, boathouse, garage, swimming pool, tennis court, private residential garage, and similar accessory structures (10/24/89 STM)
- Sec. III.D.3.h.1 Accessory Building & Structures, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 30
All structures accessory to a residential use, including buildings over one hundred (100) square feet in area; swimming pools and tennis courts and their enclosures, shall be set back from the street, abutters and conservancy district as required for buildings and structures in Appendix II, Schedule of Dimensional Requirements.
- Appendix II Schedule of Dimensional Requirements, Minimum Building/Structure Setbacks (Road, Abutter), Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 106
R6013 60,000 150 407 257 50 R4013 40,000 150 407 257 50 R40A13 40,000 150 407 40 50 R3013 30,000 100 25 15 50 R2013 20,000 100 25 15 50
- Sec. III.D.3.g Exterior Mechanical System Appliances, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 30
Exterior mechanical system appliances, including but not limited to air conditioners; condensers; generators; and pumps, shall be located to meet the applicable Minimum Building/Structure Setbacks in Appendix II, Schedule of Dimensional Requirements, except by Special Permit from the Zoning Board of Appeals.
- Wetlands Protection Regulations Sec. 4.01(6)(c) No Disturb Zones, Chatham Wetlands Protection Regulations (Rev. 6/11/2025, 1/14/2026, 7/1/2026), p. 69
Specifically, within the NDZ, the following are prohibited unless authorized by the issuance of a variance pursuant to Section 1.12 of these regulations. (1) New structures (unless limited to the footprint of an existing structure) (2) new impervious or semi-pervious hardscape (3) new swimming pools
- Sec. II Definitions, 65. Lot Coverage, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 14
“LOT COVERAGE” means the buildable upland portion of a lot which is covered by buildings, driveways, parking areas (regardless of surface materials), pools, tennis courts, decks and any other permanent structures.
- Sec. IV.A.3.f Conservancy Districts, Special Permit Uses, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 35
f. The installation of submerged pipes or cables used for swimming pools or commercial fishing operations.
- Appendix II Schedule of Dimensional Requirements, footnote 7, Protective Zoning Bylaw, as amended through May 2025 (attested 09/03/2025), p. 107
7 Except that for lots in existence prior to May 1987, a road setback of thirty (30) feet and an abutter’s setback of twenty (20) feet shall be required.
This page summarizes Chatham's posted bylaws as of 2026-10-03. Bylaws are amended, and individual lots can have overlays, subdivision covenants, or HOA rules that are stricter. Confirm with Community Development - Building Division (Building Commissioner) (508-945-5168) before you build. Spot an error?