Swimming pool rules in Cambridge, Massachusetts
Cambridge's Zoning Ordinance articles we reviewed don't have specific rules for residential swimming pools or hot tubs. The state building code still requires a building permit and a barrier at least 48 inches high, and the work must comply with zoning.
No pool-specific local rules found
We searched Cambridge's Zoning Ordinance (Articles 2, 4, 5, 20, 22 and 23) for swimming pools, pools and hot tubs and found no setback, fencing or permit rules written for residential pools. The only matches were unrelated (for example, a "pool hall" in the definitions).
What still applies
The Inspectional Services Department says anyone building or altering a structure needs a building permit first, and the work must comply with the Zoning Ordinance. Under the Massachusetts State Building Code, pools (other than small prefabricated ones under 24 inches deep) need a building permit and must have a compliant barrier; see the state rules section. Required yards under the zoning ordinance must generally stay open, so ask ISD where on your lot a pool and its equipment can go. Lots in the Floodplain Overlay District or within 100 feet of a wetland or water body may also need Floodplain Administrator or Conservation Commission review.
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Next steps
- Contact the Inspectional Services Department (831 Massachusetts Ave, 617-349-6100) to apply for a building permit for an in-ground or above-ground pool or hot tub.
- Plan a barrier that meets the state pool barrier rules, and bring a plot plan showing the pool's location relative to lot lines.
- Get separate electrical (and, for gas heaters, gas) permits from licensed trades.
Common questions
- Do I need a permit for a pool in Cambridge, MA?
- Yes. Cambridge has no pool-specific zoning rules, but the state building code requires a building permit for pools other than small prefabricated ones under 24 inches deep, and the work must comply with zoning.
- Does Cambridge, Massachusetts have pool fence requirements?
- Not locally. The state building code requires a pool barrier at least 48 inches high.
- Where can a pool go on my lot in Cambridge, MA?
- Cambridge's ordinance doesn't set pool setbacks, and required yards must generally stay open, so ask ISD where a pool and its equipment can go. Floodplain or wetland lots may need extra review.
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.