Do Multifamily Buildings Need a HERS Rating in Massachusetts?
Yes. Under the MA Stretch Code 2021, new multifamily residential construction in Massachusetts requires a HERS Rating for energy code compliance. This applies to low-rise multifamily buildings (3 stories or less above grade) covered by the residential provisions of the energy code. Mid-rise and high-rise multifamily buildings follow the commercial energy code pathway.
HERS Rating Cost for Multifamily Buildings in Massachusetts
HERS Rating costs for multifamily buildings in Massachusetts are typically priced per unit. Our pricing is as follows:
| Building Type | HERS Rating Cost |
|---|---|
| Single-Family Home | $1,850–$2,500 |
| Multifamily (per unit) | $650–$1,200/unit |
| ADU (Accessory Dwelling Unit) | $1,600–$1,850 |
Multifamily projects with more units benefit from economies of scale, reducing the per-unit cost. A 6-unit building will typically cost less per unit than a 2-unit building.
What HERS Score Is Required for Multifamily in Massachusetts?
Under the MA Stretch Code 2021, low-rise multifamily buildings must achieve a HERS score of 55 or less (same as single-family). Each dwelling unit is rated separately. The building must also pass a blower door test and, if ducted HVAC is present, a duct leakage test.
Mass Save Rebates for Multifamily HERS Ratings
Multifamily new construction projects in Massachusetts may qualify for Mass Save incentives through the New Construction program. Rebates are available for achieving a HERS score below the code minimum. HERS Rating Company is a Mass Save-approved HERS Rater and can help you maximize your rebate eligibility. Learn more about Mass Save rebates.
Get a Multifamily HERS Rating in Massachusetts
HERS Rating Company provides certified HERS Ratings for multifamily buildings throughout Massachusetts. We work directly with developers, general contractors, and architects to integrate the HERS process smoothly into your construction schedule. Contact us for a free project quote.
Related Services in Massachusetts
HERS Rating Company is a RESNET-certified, Mass Save-approved HERS Rater serving all 351 Massachusetts cities and towns.
Serving Boston, Worcester, Springfield, Cambridge, Newton, Brookline, and all 351 MA cities. Get a free quote →
Multifamily HERS Ratings in Massachusetts: What You Need to Know
All new multifamily construction in Massachusetts requires HERS Ratings in Stretch Code municipalities. HERS Rating Company specializes in multifamily projects ranging from 2-unit duplexes to 200+ unit apartment complexes. Our pricing starts at $650–$1,200 per unit with volume discounts for large projects.
Multifamily Blower Door and Duct Testing in Massachusetts
Multifamily projects require blower door testing of a representative sample of units (typically 20-25%) and duct leakage testing of all ducted systems. HERS Rating Company coordinates all testing efficiently to minimize disruption to construction schedules. We serve developers, GCs, and architects across all 351 Massachusetts cities. Call 617-584-1809.