Swimming pool rules in Medford, Massachusetts
Yes, in the rear yard. On a residential lot over 4,500 sq ft, Medford's zoning allows a pool by right; on a smaller lot you need a special permit from the Zoning Board of Appeals. The water's edge must be at least 6 feet from side and rear lot lines and pump equipment at least 12 feet, and a building permit and a 48-inch barrier are required under state code.
| Lot over 4,500 sq ft (SF-1, SF-2, GR) | Allowed by right [1] |
| Lot under 4,500 sq ft (residential districts) | Special permit from Board of Appeals [1] |
| Setback, water's edge to side/rear lot lines | 6 feet [3] |
| Setback, pump equipment | 12 feet from lot lines [3] |
| Location | Rear yard; not in required front or side yard [4] |
| Pool is an accessory structure | Yes [2] |
Is a pool allowed?
Medford's zoning defines accessory structures to include swimming pools [2], so the accessory-structure rules apply to above-ground and in-ground pools alike. The Table of Use Regulations treats pools differently by lot size: on a lot of more than 4,500 square feet, a pool is allowed by right in the SF-1, SF-2, GR and apartment districts, while on a lot of less than 4,500 square feet it needs a special permit from the Board of Appeals in those districts [1]. (The quoted table row lists one code per zoning district, in the order ROS, SF-1, SF-2, GR, APT-1, APT-2, APT-3, C-1, C-2, I, O, O-2, MUZ; "BA" means a Board of Appeals special permit and "Y" means allowed.) The table doesn't address a lot of exactly 4,500 square feet.
Where it can go
In residential districts, accessory structures can't be placed in the required front or side yard but may be built in the rear yard [4]. A pool must be set back at least six feet from the rear and side lot lines, measured from the water's edge, and any pump equipment at least 12 feet from the lot lines [3]. Structures accessory to a one- or two-family home can cover up to 25% of the rear yard area [5].
Fences and barriers
The zoning ordinance doesn't set its own pool fence rules. Under the Massachusetts building code (which adopts the International Swimming Pool and Spa Code), pools need a building permit unless they're prefabricated and under 24 inches deep, and they need a barrier at least 48 inches high with self-closing, self-latching gates. Hot tubs and spas with a lockable safety cover are exempt from the barrier rule. Electrical work needs a separate permit. See the state rules section for details.
See how Medford compares with 8+ other Massachusetts towns on swimming pools →
Next steps
- Check your lot size: over 4,500 sq ft, a pool is allowed by right; under 4,500 sq ft, apply to the Zoning Board of Appeals for a special permit.
- Draw a plot plan placing the pool in the rear yard with the water's edge at least 6 ft and pump equipment at least 12 ft from side and rear lot lines.
- Apply to the Medford Building Department (781-393-2509) for a building permit and an electrical permit, showing the 48-inch barrier and gate details.
Common questions
- Do I need a permit for a pool in Medford, MA?
- Yes. A building permit and electrical permit are required, and under state code pools need a barrier at least 48 inches high. On a residential lot over 4,500 sq ft a pool is allowed by right; on a smaller lot you need a Zoning Board of Appeals special permit.
- How far does a pool need to be from the property line in Medford, Massachusetts?
- The water's edge must be at least 6 feet from side and rear lot lines and pump equipment at least 12 feet. Pools go in the rear yard, not the required front or side yard.
- What are the pool fence requirements in Medford, MA?
- Medford's zoning doesn't set its own pool fence rules. Under the state building code, pools need a barrier at least 48 inches high with self-closing, self-latching gates; spas with a lockable safety cover are exempt.
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
- Table A, K.8 (Swimming pool), Revised Ordinances Chapter 94 - Zoning (Municode, Supp. No. 18, codified through Ord. No. 889 adopted April 16, 2024), p. 1
8. Swimming pool, on a lot with: Less than 4,500 sq. ft. BA BA BA BA BA BA BA Y Y Y N N Y NA NA More than 4,500 sq. ft. BA Y Y Y
- Sec. 94-12.0, "Accessory structure", Revised Ordinances Chapter 94 - Zoning (Municode, Supp. No. 18, codified through Ord. No. 889 adopted April 16, 2024), p. 1
Any structure which is incidental and subordinate to the principal structure, but which is located on the same lot as the principal structure. Shall include carports, ground-mounted solar panels and swimming pools.
- Sec. 94-4.3.2(4), Revised Ordinances Chapter 94 - Zoning (Municode, Supp. No. 18, codified through Ord. No. 889 adopted April 16, 2024), p. 1
A swimming pool must be set back a minimum six feet from rear and side lot lines measured from the water's edge to the lot lines, and a minimum setback of 12 feet from the lot lines for any type of pump equipment.
- Sec. 94-4.3.2(1), Revised Ordinances Chapter 94 - Zoning (Municode, Supp. No. 18, codified through Ord. No. 889 adopted April 16, 2024), p. 1
In residential districts, no accessory structure shall be located within the required front or side yard or any court but may be built in the rear yard subject to section 94-4.2.5.
- Sec. 94-4.2.5(1), Revised Ordinances Chapter 94 - Zoning (Municode, Supp. No. 18, codified through Ord. No. 889 adopted April 16, 2024), p. 1
No structure shall be built within the rear yard except for a structure accessory to a one or two-family dwelling which may occupy up to 25 percent of the rear yard area.