Is Massachusetts 225 CMR 29.00 in force?

Yes. In force from Jul 1, 2026.

Which products does Massachusetts 225 CMR 29.00 affect?

Massachusetts 225 CMR 29.00 affects Commercial and utility energy storage systems and Solar PV.

When does Massachusetts 225 CMR 29.00 take effect?

The effective date on file is July 1, 2026.

225 CMR 29.00

PartialRead in the state’s own source. It stays partial until the passage is on file word for word.

What does Massachusetts 225 CMR 29.00 do? Requires local governments to accept consolidated permit applications by Oct 1, 2026 for solar under 25 MW and storage under 100 MWh. Decisions are due within 12 months, or the permit is approved by default. Storage of 250 kWh or less and accessory behind-the-meter systems skip the site suitability rules.

Facts

Kind: Rule
Status: In force
Stage: In force
Signed or decided: July 1, 2026
Effective: July 1, 2026
Topics: Fire protection and siting, Permitting, Recycling and end of life
Products: Commercial and utility energy storage systems Solar PV
Source: Massachusetts Department of Energy Resources (opens in a new tab)

The state’s codes

The codes that reach each product this law names, with the edition Massachusetts is on. Each links to the record.

For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use