Swimming pool rules in Plymouth, Massachusetts
Plymouth has no pool-specific bylaw. The zoning bylaw requires a zoning permit before any structure is built, an above-ground pool 3 feet or taller must stay out of required yards, and on a septic lot an in-ground pool must be at least 10 feet from both the septic tank and the leach field. Pool fencing and barrier rules come from the state building code, not a local bylaw.
| Local pool bylaw | None; the bylaw mentions pools only as customary accessory facilities in special-development sections [1] |
| Zoning permit | Required before any structure is erected [2] |
| Setback from septic tank / leach field | 10 feet (in-ground pool) [4] |
| Required yards | Must stay clear of structures 3 feet or more in height [3] |
| Septic as-built plans | Must show swimming pools [5] |
Zoning
Plymouth's zoning bylaw has no section specifically regulating residential swimming pools. Pools appear only in the sections for special development types such as Recreational Developments, which list a swimming pool among "customary Accessory Use and Structure" [1]; that list doesn't govern an ordinary house lot, but it shows the bylaw treats pools as ordinary accessory facilities. Under the bylaw, no building or structure may be erected without a zoning permit from the Building Commissioner [2]. Required yards must be kept clear of any structure 3 feet or more in height, other than minor structures like fences [3], so an above-ground pool, raised deck or pool house generally has to meet the district's yard setbacks. The bylaw doesn't spell out setbacks for in-ground pools, so ask Inspectional Services which setbacks they apply.
Septic systems
The Board of Health follows strict Title 5 setbacks for new construction, and its local setback table (two columns: septic/holding tank, pump chamber or treatment unit; and soil absorption system, the leach field) lists 10 feet in both columns for an in-ground swimming pool [4]. These setbacks are labeled for new construction. Septic as-built plans must also show areas set aside for a reserve system and other structures such as swimming pools or sheds [5], so check where your system and reserve area are before siting a pool.
Barriers and hot tubs
The local documents we reviewed don't set pool fence or barrier rules for private homes; those come from the Massachusetts building code (see the state rules on this page). The Board of Health's permit fees for pools and special-purpose pools such as hot tubs apply to public and semi-public pools, not backyard pools.
Near water
A pool within a wetland buffer, floodplain or near the coast may also need Conservation Commission approval under the town wetlands bylaw.
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Next steps
- Locate your septic tank, leach field and reserve area (Board of Health records) and keep an in-ground pool at least 10 feet away.
- Apply for a zoning permit and building permit at Inspectional Services (26 Court Street, 508-747-1620) with a plot plan showing the pool, fencing and distances to lot lines.
- Plan a barrier (fence, gates, alarms or cover) that meets the state building code pool rules.
- If the yard is near wetlands, a pond or the coast, check with the Conservation Commission before digging.
Common questions
- Do I need a permit for a pool in Plymouth, MA?
- Yes. Plymouth requires a zoning permit before any structure is built, and you apply for zoning and building permits at Inspectional Services with a plot plan showing the pool, fencing and distances to lot lines.
- What are the pool setback rules in Plymouth, Massachusetts?
- Plymouth has no pool-specific bylaw. An above-ground pool 3 feet or taller must stay out of required yards; the bylaw doesn't spell out in-ground pool setbacks, so ask Inspectional Services. On a septic lot, an in-ground pool must be at least 10 feet from the septic tank and leach field.
- What are the pool fence requirements in Plymouth, MA?
- Plymouth's local documents don't set pool fence or barrier rules for private homes; those come from the Massachusetts state building code.
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
- §207-1.C Recreational Development (RD), Uses by Special Permit (item 8), Zoning Bylaw of the Town of Plymouth (as amended through October 2025), p. 129
8. Golf course, country club, tennis court, swimming pool, and other customary Accessory Use and Structure;
- §202.2.A Zoning Permit Required, Zoning Bylaw of the Town of Plymouth (as amended through October 2025), p. 28
A. No Building or Structure shall be erected, structurally altered, added to or moved, nor shall any change of land use be made, and no Building Permit shall be issue, except as authorized by a Zoning Permit.
- §201-3 Definitions, Yard, Zoning Bylaw of the Town of Plymouth (as amended through October 2025), p. 27
YARD – A portion of a Lot required to be maintained as Open Space unoccupied and unobstructed by any Structure or portion thereof 3 or more feet in Height, except for those customarily located within a Setback, such as a fence, wall, pole, post or other minor Accessory Structure or such other Structure as may be expressly allowed by Special Permit.
- Regulation 2.5, Distance (local setback table), Board of Health Rules and Regulations (revised May 12, 2017) - incl. Rules and Regulations Governing Poultry, p. 8
Inground Swimming Pool 10 10
- Procedures on Septic System Installation, as-builts, Board of Health Rules and Regulations (revised May 12, 2017) - incl. Rules and Regulations Governing Poultry, p. 4
All as builts must also certify areas set aside for reserve and any other structures such as swimming pool or sheds.