Leominster, MA Solar Energy: Expedited Solar Permitting (2026)
Key Facts
- Roof-mounted solar
- Building permit only, no site plan
- Small ground-mounted
- <=900 sq ft or 1.5% lot: permit only
- Residential roof panels
- Max 12 in. above roof surface
- Non-res flat roof panels
- Max 4 ft height, up to 50 deg tilt
- Larger ground-mounted arrays
- Need site plan + special permit
- Penalty for noncompliance
- Up to $300 per day
Summary
Leominster lets roof-mounted solar systems and small ground-mounted arrays skip site plan and special permit review entirely. Under the solar ordinance, both need only a building permit, provided roof systems meet stated setback, tilt and height limits.
d.All roof mounted solar energy systems are permissible with a building permit. ... d.Ground-mounted systems equal to or less than nine hundred square feet or one and one-half percent of lot size, whichever is larger, may be installed by an applicant via issuance of a building permit. ... 6.Standards for roof-mounted systems.a.Roof-mounted systems may be installed in applicable zoning districts by an applicant requiring only that a building permit be issued and that the system conforms to the following conditions:i.Within residential districts, roof-mounted systems shall conform to existing roof contours, extending not more than twelve inches above the roof surfaces. Roof-mounted systems shall be set back a minimum of eight inches from all roof edges (eaves, gutter line, ridge) of the roof surface and twenty-four inches from adjacent roof or abutting roof or walls of adjoining property.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 24).
Full Breakdown
Leominster's Article XVII solar ordinance, Sec. 22-104, splits systems into a fast building-permit-only track and a slower site plan/special permit track. a confirms roof-mounted systems may be installed in applicable zoning districts by an applicant requiring only that a building permit be issued, subject to design conditions: in residential districts, panels must conform to existing roof contours, extend no more than twelve inches above the roof surface, and sit back at least eight inches from roof edges (eaves, gutter line, ridge) and twenty-four inches from an adjoining roof or wall.
On non-residential flat roofs, panels may tilt up to fifty degrees and rise no more than four feet above the roof; on pitched non-residential roofs the panel may project no more than two feet, measured perpendicular to the roof. c. b and comply with the State Building Code.
Violations & Fines
Installing a roof- or small ground-mounted solar system without the required building permit, or exceeding the roof setback, tilt and height limits in Sec. 22-104(6)(a), forfeits the expedited by-right path and can require after-the-fact site plan review. Enforcement runs through the director of inspections under Sec. 22-15, the zoning ordinance's general penalty: up to $300 per violation, with each day of continued violation a separate offense.
Frequently Asked Questions
Do I need planning board approval to put solar panels on my roof in Leominster?
Is there a size cutoff for a ground-mounted system to skip site plan review?
What roof setbacks apply to residential solar panels?
Sources & Official References
Other rules in Leominster
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