Swimming pool rules in Weston, Massachusetts
Yes, with a building permit. Weston's Zoning By-law treats a swimming pool plus a 5-ft apron around the water as a "structure," so the pool and apron must meet the same setbacks as a house: 20 to 45 ft from lot lines, depending on district. Pool lights must be off by 11:00 p.m., and barrier fencing follows the state building code.
| Pool counts as | A structure, including a 5-ft apron measured from the water's edge [1] |
| Setback from lot lines | 45 / 35 / 25 / 20 ft in Districts A / B / C / D [3] |
| Setback from street side line | 60 / 50 / 40 / 30 ft in Districts A / B / C / D [4] |
| Pool lighting | Must be extinguished by 11:00 p.m. [5] |
| Water restrictions | Filling or topping off pools can be banned during a declared State of Water Supply Conservation [6] |
| Draining | Dechlorinated water (under 1 ppm chlorine) may be discharged if no nuisance [7] |
Zoning setbacks
Weston's Zoning By-law includes a "swimming pool, and an apron of five (5) feet measured from water's edge" in its definition of a structure [1]. Every building or structure in the Single Family Residence Districts must meet the dimensional table's setbacks [2]. So the pool plus a 5-ft band around the water must be at least 45, 35, 25 or 20 ft from lot lines in Districts A, B, C and D [3], and 60, 50, 40 or 30 ft from the street side line [4]. The by-law doesn't distinguish in-ground pools, above-ground pools and hot tubs, so assume any fixed pool or spa is a structure.
Lighting
Lights for swimming and wading pools must be shielded to avoid glare onto streets and neighboring homes, and "shall be extinguished not later than 11:00 p.m." [5].
Water use
During a declared State of Water Supply Conservation, the town's water use by-law can prohibit filling and topping off swimming pools [6]. When draining, dechlorinated pool or hot tub water (less than 1 ppm chlorine) may go to the storm drain system if it's drained in a way that doesn't cause a nuisance [7].
Barriers and permits
The local sources we reviewed don't set their own pool fence rules. The state building code requires a building permit for most pools and a barrier at least 48 inches high with self-closing, self-latching gates (see state rules). Note that a pool fence over 6 ft would itself count as a zoning structure subject to setbacks.
Wetlands
A pool within 100 ft of a wetland or 200 ft of a river needs Conservation Commission review under Weston's Wetlands Protection By-law, which also has a 25-ft No-Disturb Zone.
The General By-laws compilation we reviewed runs through September 2022.
See how Weston compares with 8+ other Massachusetts towns on swimming pools →
Next steps
- Find your zoning district and draw a plot plan showing the pool and its 5-ft apron outside the required setbacks.
- Apply to Inspectional Services (781-786-5040) for a building permit, plus electrical (and gas, if heated) permits; in-ground pool plans need a registered design professional.
- If the pool is within 100 ft of a wetland or 200 ft of a river, file with the Conservation Commission first.
- Install a code-compliant barrier (48 in. minimum, self-closing and self-latching gates) before filling the pool.
Common questions
- Do I need a permit for a pool in Weston, Massachusetts?
- Yes, with a building permit. Barrier fencing follows the state building code.
- How far must a pool be from the property line in Weston, Massachusetts?
- A pool plus a 5-ft apron around the water counts as a structure and must meet house setbacks: 45, 35, 25 or 20 ft from lot lines in Districts A, B, C and D, depending on district.
- Are there pool lighting rules in Weston, Massachusetts?
- Pool lights must be off by 11:00 p.m.
- Can I fill or drain my pool in Weston, Massachusetts?
- Filling or topping off can be banned during a declared State of Water Supply Conservation. Dechlorinated water under 1 ppm chlorine may be discharged if no nuisance.
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, Structure, Zoning By-law (Article VIII of the By-laws), through 2025 Special Town Meeting, p. 10
Anything constructed, assembled, erected or maintained at a fixed location above or below ground, including, but not limited to, the following examples: antenna, bridge, building, gazebo, mechanical equipment, pergola, platform or deck, satellite dish, shed, swimming pool, and an apron of five (5) feet measured from water’s edge, tennis or similar court, tower, trailer without wheels, trellis, tunnel.
- Sec. VI.B.1 Single Family Residence Districts, Minimum Requirements, Zoning By-law (Article VIII of the By-laws), through 2025 Special Town Meeting, p. 54
Every building or structure shall be so situated as to have at least the setbacks from street side line and street center line and all lot lines specified in such table.
- Sec. VI.B.2 Table of Conventional Dimensional Requirements, Zoning By-law (Article VIII of the By-laws), through 2025 Special Town Meeting, p. 55
Minimum setback from lot line (e) (f) 45 ft. 35 ft. 25 ft. 20 ft.
- Sec. VI.B.2 Table of Conventional Dimensional Requirements, Zoning By-law (Article VIII of the By-laws), through 2025 Special Town Meeting, p. 55
Minimum setback from street side line (a) (e) (f) 60 ft. 50 ft. 40 ft. 30 ft
- Sec. V.J.2 Exterior Lighting, Zoning By-law (Article VIII of the By-laws), through 2025 Special Town Meeting, p. 37
All artificial lights used to illuminate tennis or paddle tennis courts, swimming and wading pools and other private recreation areas shall be extinguished not later than 11:00 p.m.
- Water Use Restriction By-law, Sec. 5(v), General By-laws of the Town of Weston (amendments through September 2022), p. 52
v) Swimming Pools: Filling and topping off of swimming pools is prohibited.
- Stormwater/Illicit Discharge By-law, exempt discharges (vii), General By-laws of the Town of Weston (amendments through September 2022), p. 60
vii) Discharge from dechlorinated swimming pool or hot tub water (less than one ppm chlorine) provided the pool or hot tub is drained in such a way as not to cause a nuisance;