Solar permitting — Hampshire County, Massachusetts

Setbacks & buffers

None codified at county level. Municipal bylaws govern ≤25 MW; EFSB review for >25 MW. — NOTE: the distances above are a STATE-level fallback, not a figure read from this county's own ordinance. We hold siting-rule records for this county which may include a stricter local limit we have not yet extracted. Verify against the county's own ordinance before relying on these.

Spacing requirements

None codified.

Size restrictions

None codified.

Penalties & bonding

No penalties or adjustments. Standard CUP/SUP process.

State-level permits & approvals

2024 Massachusetts Climate Act (signed Nov 21, 2024): historic reform of siting and permitting. Large projects (>25 MW generation or >100 MWh storage): Energy Facilities Siting Board (EFSB) consolidates state and local review into single master permit; 15-month deadline for EFSB decision. Small projects (≤25 MW / ≤100 MWh): municipalities retain permitting authority under new streamlined process (225 CMR 29.00 promulgated Feb 27, 2026; effective immediately). 12-month deadline for municipal decisions on small clean energy projects. MGL Ch.40A §3 (Massachusetts Zoning Act): zoning ordinances cannot prohibit or unreasonably regulate solar energy systems — long-standing solar protection for sub-threshold projects. DOER site suitability scoring framework; community benefit plan requirements for larger projects. ISO-NE interconnection required statewide.

State incentive programs

MA SMART Program (Solar Massachusetts Renewable Target): production incentive paid per kWh generated for 10 years for projects ≤5 MW; administered by DOER/utilities. Adder rates for low-income housing, brownfields, rooftops, and agrivoltaic projects. Net metering: available statewide (up to 5 MW for behind-the-meter); MA expanded net metering cap via DPU. MA RPS: 40% renewable by 2030 (Class I); Class I solar carve-out drives SREC value. MA Clean Energy Center MassSave: rebates for commercial/industrial efficiency and solar. Utility: Eversource (NSTAR/WMECo) and National Grid serve most counties; Cape Light Compact serves Barnstable and Dukes; various municipal aggregations active.

Grid & interconnection

ISO-NE / West/Central Massachusetts (WCMA) zone — Eversource / National Grid

• Town of Amherst Solar2.5 MW · operating
• CED Northampton Solar LLC Hybrid2.3 MW · operating
• Syncarpha Northampton Hybrid CSG2 MW · operating
• Ware Palmer Road Solar LLC CSG2 MW · operating
• UMass PV Lot 222 MW · operating
• Granby Solar, LLC CSG2 MW · operating
• Hampshire College Hybrid1 MW · operating
• Hadley 3 Solar (North)1 MW · operating

• HadleySolar — Section XXVIII 'Solar Energy Systems' allows small-scale, ground-mounted solar in any zoning district with an administrative review and building permit. Large-scale, grou
• HatfieldSolar — Hatfield's zoning bylaw permits 'Renewable or Alternative Energy Development Facilities' (Use 5.26) by right only in Industrial and Light Industrial Districts. This is a
• PlainfieldSolar — Plainfield has an existing Section IX 'Large Scale Ground Mounted Solar Photovoltaic Arrays,' which includes a Solar Photovoltaic Overlay District that allows large-scale
• SouthamptonSolar — Southampton's Chapter 275 Zoning Bylaw, adopted at Town Meeting on May 9, 2023 and approved by the MA Attorney General on March 4, 2024, includes a section on solar elect2023-05-09
• WesthamptonBESS — Battery storage is addressed only as an appurtenant structure to ground-mounted solar energy systems under Section 5.14.5 ('Structures & Batteries'). The provision requir2023-11-06
• WesthamptonSolar — Westhampton establishes a Solar Photovoltaic Overlay District (SPD) over the capped landfill site for large- and medium-scale solar. Small-scale systems (≤2,100 sq ft pan2023-11-06
• WilliamsburgSolar — Williamsburg's zoning bylaw (Section 9.30) and a Solar Photovoltaic Overlay District (SPOD) regulate commercial ground-mounted solar. Installations of 1.25–20 acres in th