Subnational jurisdiction · as of 2026-09-06
Massachusetts's data-center permitting spine runs through ordinary municipal zoning under the Zoning Act (adoption and amendment of local ordinances, and special permits where a district allows a data center only by special exception), the Massachusetts Environmental Policy Act's review of state agency permitting actions with significant environmental impact, and the Department of Environmental Protection's air-pollution permitting and enforcement authority over a data center's backup generator fleet.
The state's principal data-center incentive is a sales and use tax exemption for qualified data-center equipment, software, electricity, and construction costs, enacted as part of the 2024 economic development bond act (popularly the Mass Leads Act) and inserted into the sales tax chapter; it conditions eligibility on a state secretary's certification, a minimum $50,000,000 investment within 10 years, at least 100,000 square feet, and at least 100 jobs, running for a 20-year qualification period per certified data center building.
5 instruments on record, grouped by the family of approval each one governs.
Who decides whether a data center may occupy a site, and through what approval?
Applies to government
Governs the procedure by which a city or town adopts, amends, or repeals its zoning ordinance or by-law, including the process for initiating and voting on a change. A data-center rezoning to permit the use in a district, or to add a data-center overlay district, proceeds under this section.
Source: Full text of law
Applies to both
Authorizes a zoning ordinance or by-law to require a special permit for specified uses in a district, issuable only for uses in harmony with the ordinance's general purpose and intent and subject to conditions the ordinance sets. Where a municipality's zoning allows a data center only by special exception rather than as of right, this is the enabling authority for that case record.
Source: Full text of law
What impact review must precede approval, and who leads it?
Mass. Gen. Laws ch. 30, §§ 61-62H
Applies to government
Requires every state agency, department, board, commission, and authority to review, evaluate, and determine the environmental impact of, and consider reasonable alternatives to, an action within its authority that could damage the environment, including foreseeable climate change impacts, and to act to avoid or minimize that damage where practicable.
A data-center project needing a state permit, license, or funding action, such as a state highway access permit or a MassDEP permit, above the Executive Office of Energy and Environmental Affairs' review thresholds passes through this MEPA review before the triggering state action issues.
Source: Full text of law
What permits govern backup generators and ongoing emissions?
Mass. Gen. Laws ch. 111, § 142A
Applies to both
Authorizes the Department of Environmental Protection to adopt regulations to prevent air pollution or contamination of the atmosphere; a data center's backup diesel generator fleet permits under the department's air-quality regulations issued pursuant to this authority.
A violation of a regulation, permit, plan approval, or order under this section is punishable by a criminal fine of up to $25,000, up to a year's imprisonment, or both, or by a civil penalty of up to $25,000 per violation, with each day of a continuing violation a separate violation.
Source: Full text of law
What fiscal agreements attach a data center to its host jurisdiction?
Mass. Gen. Laws ch. 64H, § 6(zz), inserted by St. 2024, c. 238, § 214
Effective 2024-11-20 · Applies to private
Exempts from sales and use tax: eligible data-center equipment for use in a qualified data center; computer software for use in a qualified data center; electricity for use or consumption in operating a qualified data center; and construction costs for building, renovating, or refurbishing a qualified data center.
A qualified data center is one or more data-center buildings totaling at least 100,000 square feet on a single or contiguous parcel, constructed or substantially refurbished, with specified security and reliability features (uninterruptible power or generator backup, fire suppression, and enhanced security). The aggregate eligible data-center costs of the facility must reach at least $50,000,000 within a 10-year period from the secretary's certification.
The facility must also maintain a minimum of 100 jobs in the commonwealth. The secretary of the executive office of economic development, in consultation with the commissioner of revenue, certifies each qualified data center and each building's 20-year qualification period; the exemption travels with the facility to a subsequent owner for the remainder of that period if the facility is sold.
The paragraph inserting this exemption, St. 2024, c. 238, § 214, applies to costs incurred after November 20, 2024, the date Chapter 238 of the Acts of 2024 was signed.
Source: Full text of law
Every entry cites the instrument it describes. None of it is legal advice: verify a citation before relying on it. Full sourcing: read the methodology. The rest of the record: all jurisdictions.