HERS Rating Stoneham, MA — Stretch Code HERS 42/45
Certified HERS Rater serving Stoneham, Massachusetts — helping builders, developers & homeowners meet the Massachusetts Stretch Energy Code and qualify for Mass Save incentives.
Get a Free QuoteCall 617-584-18092026 Massachusetts Energy Code Facts — Stoneham
Stoneham enforces the Massachusetts Stretch Energy Code (225 CMR 22), adopted effective 7/1/2017. Under the 2025 code update (current for 2026 permits), new homes in Stoneham must reach a maximum HERS Index of 42 (mixed-fuel) or 45 (all-electric) — up to 48 with qualifying credits — verified by a RESNET-certified HERS rater. ADUs must meet HERS 52–58, and major alterations, additions or change-of-use projects HERS 65–75, depending on fuel type and on-site solar.
- Energy code status: Stretch Code (effective 7/1/2017) — 1 of 242 MA municipalities (as of the June 2026 Mass.gov adoption list).
- Required testing & verification: blower door (air infiltration) testing, duct leakage testing, balanced mechanical ventilation (ERV/HRV), plus EV-ready and solar-ready provisions on the HERS compliance path.
- Mass Save® 2026 new-construction incentives: up to $25,000 per all-electric single-family home (Passive House tier; $7,500 base tier, $15,000 ENERGY STAR® NextGen tier — HERS ≤45), up to $40,000 for a 4-unit building, up to $3,750/unit for 5+ unit multifamily, and up to $30,000 for major all-electric renovations. Every tier requires enrollment and verification by an approved HERS rating company.
Related Stoneham services: Blower Door Testing Stoneham · Duct Leakage Testing Stoneham · Stretch Code Compliance Stoneham · MA Energy Codes Guide — or get a free quote from our RESNET-certified team (617-584-1809).
Sources: 2025 DOER Massachusetts Stretch & Specialized Codes Technical Guidance (Sept 2025); Mass.gov Building Energy Code Adoption by Municipality (June 2026); Mass Save 2026 Residential New Construction program.
Common Questions About the Stoneham Energy Code
Is a HERS rating required in Stoneham, MA?
Yes. Stoneham has enforced the Massachusetts Stretch Energy Code since 7/1/2017, so new dwellings need a certified HERS rating from a RESNET-accredited rater — with blower door and duct leakage testing — before the certificate of occupancy.
What HERS score is required in Stoneham?
Homes permitted in Stoneham today must score HERS 42 or lower (mixed-fuel) or HERS 45 or lower (all-electric), up to 48 with qualifying credits. ADUs fall in the HERS 52–58 range and major alterations/additions in the 65–75 range, depending on fuel type and on-site solar.
Which energy code does Stoneham follow in 2026?
Stoneham is one of 242 of Massachusetts’ 351 municipalities enforcing the Stretch Energy Code (225 CMR 22) per the June 2026 Mass.gov adoption list; 60 towns have gone further to the Specialized Code and 49 remain on the Base Code.
Official Maximum HERS Index Scores (Table R406.5)
These are the official maximum HERS Index scores that apply to projects in Stoneham under Table R406.5 of the current code (2025 DOER Technical Guidance):
| Building type | New construction (permits after 7/1/2024) | New construction w/ embodied-carbon credit (R406.5.2) | Accessory Dwelling Units | Major alterations, additions, change of use |
|---|---|---|---|---|
| Mixed-fuel building | 42 | 45 | 52 | 65 |
| Mixed-fuel + solar electric | 42 | 45 | 55 | 70 |
| All-electric building | 45 | 48 | 55 | 70 |
| All-electric + solar electric | 45 | 48 | 58 | 75 |
Scores are measured before counting on-site renewable generation (per R406.5). Historic buildings may opt out for alterations under R503.1.1. Embodied-carbon credits (+3 points) come from low-GWP concrete and insulation EPDs per Table R406.5.3/R406.5.4.
Complete Stretch Code Compliance Requirements in Stoneham
Beyond the HERS maximums above, every new dwelling in Stoneham on the HERS pathway must satisfy four code sections — R403.6 (Ventilation), R404.4 (EV Ready), R406 (HERS) and Appendix RB (Solar Ready) — per the 2025 DOER Technical Guidance:
- Balanced mechanical ventilation (R403.6): an ERV or HRV system meeting minimum system airflow, heat/energy-recovery efficiency, fan sound ratings and regulated air-inlet and exhaust locations — verified by field testing.
- EV-Ready parking (R404.4): pre-wiring with a connection point and dedicated electrical panel capacity for future vehicle charging.
- Solar-Ready roof (Appendix RB): a dedicated solar zone with structural-load verification, an electrical interconnection pathway and reserved panel space — unless the project installs solar directly.
- Air-tightness & duct sealing: blower door result of 3.0 ACH50 or lower (Climate Zone 5) and duct leakage within 4 CFM25 per 100 sq ft.
Passive House alternative (R405): Phius or PHI certification satisfies the code in Stoneham in place of a HERS score — with a Certified Passive House Consultant for design and a Phius Certified Verifier/Rater during construction — and still requires EV-Ready and Solar-Ready compliance. Prescriptive path: allowed only for buildings without individually separate dwelling units, additions, and alterations — and a whole-building prescriptive project must implement 2 of the 3 additional-efficiency packages in R408 (enhanced envelope, higher-efficiency HVAC, or reduced water-heating energy). Additions of 1,000 sq ft or more (or exceeding 100% of the existing floor area) must meet both R502.3 prescriptive and the R406.5 HERS limits. Level III alterations (work area over 50% of the home and over 1,000 sq ft) also trigger HERS compliance; historic buildings are exempt under R501.6. Note that ENERGY STAR® is no longer a compliance path — HERS and Passive House are the two certification routes in Stoneham.
Detail sourced from the 2025 Massachusetts Stretch & Specialized Codes Technical Guidance (DOER, Sept 2025), Table R406.5 and Appendix RC.
HERS Rating Services in Stoneham, MA
HERS Rating Company provides certified HERS Index ratings in Stoneham, Massachusetts. Our RESNET-accredited raters deliver fast, accurate energy ratings to keep your project on schedule and in full compliance with Massachusetts energy codes.
Whether building new or renovating in Stoneham, MA, our certified HERS raters provide all documentation needed for building permits and final inspections.
Set against the Middlesex Fells Reservation, Stoneham is a close-knit suburban town of early-20th-century Colonials, Capes, and bungalows, with steady infill construction and renovation activity. Our RESNET-certified raters help homeowners and builders here meet energy code on everything from gut renovations to new single-family homes.
All Services We Offer in Stoneham, MA
Why Stoneham Builders Choose Us
- RESNET Certified Raters — Fully accredited with years of Massachusetts experience
- Fast Turnaround — Energy reports delivered within 24 hours
- MA Stretch Code Experts — Deep knowledge of IECC 2021 & MA Stretch Code
- Mass Save Qualified — Help maximize your energy efficiency rebates
- Competitive Pricing — Transparent flat-rate quotes, no hidden fees
Massachusetts Stretch Energy Code in Stoneham
The MA Stretch Energy Code requires all new residential construction to be verified by a certified HERS rater. Builders in Stoneham must meet IECC 2021 requirements including air tightness tested by blower door and duct leakage verified by duct leakage testing. We provide all documentation required by the Stoneham building department.
Ready to schedule your HERS rating in Stoneham, MA? Get a fast, free quote today.
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Frequently Asked Questions — HERS Rating in Stoneham, MA
How much does a HERS Rating cost in Stoneham, MA?
HERS Rating costs in Stoneham typically depend on home size, design complexity, and the number of required site visits. For an accurate quote tailored to your Stoneham project, call our RESNET-certified team at 617-584-1809.
Is a HERS Rating required for new construction in Stoneham?
Yes. New residential construction in Stoneham, MA must demonstrate energy-code compliance, and a HERS Rating is the standard path under the Massachusetts Stretch Code. Call 617-584-1809 to confirm requirements for your build.
How long does a HERS Rating take in Stoneham?
A HERS Rating in Stoneham generally involves plan review, a mid-construction inspection, and a final test with blower door and duct testing. Timing depends on your construction schedule. Reach us at 617-584-1809 to coordinate.
What is the HERS score requirement for the MA Stretch Code?
The Massachusetts Stretch Code sets maximum HERS index targets that vary by code version and home type, with lower scores indicating greater efficiency. Our Stoneham raters help you hit the required score—call 617-584-1809.