⭐ Massachusetts #1 RESNET-Certified Energy Testing Company

MA Stretch Code 2021 Compliance in Massachusetts

Full IECC 2021 MA Stretch Code Compliance — Plan Review to Final HERS Certification

RESNET Certified
Mass Save Qualified
IECC 2021 Experts
Full Compliance Package
Serving All 351 MA Cities
About This Service

What Is the MA Stretch Code 2021?

The MA Stretch Code requires new residential buildings to achieve: a HERS score of 55 or below · maximum 3.0 ACH50 air leakage · maximum 4% total duct leakage — all verified by a RESNET-certified rater. As of January 2023, it is based on IECC 2021 and adopted by over 270 MA municipalities.

Complete Massachusetts Stretch Energy Code 2021 compliance services for residential new construction. We manage the entire process — from plan review and energy modeling through on-site testing and final HERS certification.

55
Max HERS score for new construction
3.0
ACH50 max blower door requirement
4%
Max total duct leakage for forced-air systems
270+
MA municipalities that have adopted the Stretch Code
Why Choose Us

Why Massachusetts Builders Choose HERS Rating Company

With hundreds of certified projects statewide, we offer unmatched expertise, fast turnaround, and full compliance support for builders, developers, and homeowners.

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Plan Review & Modeling

Before construction, we review your plans and create an energy model to verify compliance and identify cost-effective paths to meeting Stretch Code requirements.

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Construction Phase Support

Intermediate blower door and duct tests during construction verify compliance before it’s too late to make corrections.

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HERS Certification

We perform the complete HERS Rating including all required tests and deliver a RESNET-certified report documenting your compliance.

Permit Documentation

Our RESNET-certified HERS reports are accepted by all Massachusetts building departments as documentation of MA Stretch Code compliance.

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Mass Save Integration

Stretch Code compliance testing is often required for Mass Save rebates. We handle both compliance certification and Mass Save documentation.

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Expert Guidance

Our RESNET-certified raters have helped hundreds of MA builders navigate Stretch Code requirements from design through final certification.

Our Process

How It Works — From Quote to Certified Report

A clear four-step process designed to keep your project on schedule and on budget.

1

Plan Review & Quote

Submit your building plans. We review them, create an energy model, and provide a compliance roadmap and transparent quote.

2

Pre-Construction Modeling

We model your plans to a HERS score and identify compliance risks before construction begins — allowing design changes cost-effectively.

3

Construction Phase Testing

Intermediate tests as needed — pre-insulation blower door and duct tests — to verify compliance during the construction process.

4

Final Certification

Final HERS Rating, RESNET-certified compliance report, and documentation for your building permit office.

Related Services

Complete Energy Testing & Compliance Services

We offer all services required for new construction compliance in Massachusetts — schedule them together for maximum savings.

FAQ

Frequently Asked Questions

How much does MA Stretch Code compliance cost?

MA Stretch Code compliance package pricing: Single-family homes $1,850–$2,500 · Multifamily (per unit) $650–$1,200 · ADUs $1,600–$1,850. Full package includes HERS Rating, blower door testing, and duct leakage testing. Contact us for a free, project-specific quote.

What is the MA Stretch Code 2021?

The MA Stretch Code requires new homes to achieve: HERS score 55 or below · blower door 3.0 ACH50 or less · duct leakage 4% or less — all verified by a RESNET-certified rater. Adopted in 270+ MA municipalities.

Is the MA Stretch Code required in my town?

The Stretch Code is adopted in over 270 MA municipalities, including most of Greater Boston, MetroWest, North Shore, South Shore, and many others. Check with your local building department.

How do I prove compliance to my building department?

MA Stretch Code compliance is documented through a RESNET-certified HERS report. Our reports are accepted by all Massachusetts building departments.

What is the Specialized Stretch Code?

The Specialized Stretch Code requires homes over 3,000 sq ft to achieve HERS score 45 or below. We can help determine which code applies to your project.

Do you serve all MA cities?

Yes. We provide complete MA Stretch Code compliance services for new construction across all 351 cities and towns in Massachusetts.

Service Areas

Serving All 351 Massachusetts Cities & Towns

Find your city below for a location-specific service page with local information.

All Massachusetts Cities

AbingtonActonAcushnetAdamsAgawamAlfordAmesburyAmherstAndoverAquinnahArlingtonAshburnhamAshbyAshfieldAshlandAtholAttleboroAuburnAvonAyerBarnstableBarreBecketBedfordBelchertownBellinghamBelmontBerkleyBerlinBernardstonBeverlyBillericaBlackstoneBlandfordBoltonBostonBourneBoxboroughBoxfordBoylstonBraintreeBrewsterBridgewaterBrimfieldBrocktonBrookfieldBrooklineBucklandBurlingtonCambridgeCantonCarlisleCarverCharlemontCharltonChathamChelmsfordChelseaCheshireChesterChesterfieldChicopeeChilmarkClarksburgClintonCohassetColrainConcordConwayCummingtonDaltonDanversDartmouthDedhamDeerfieldDennisDightonDouglasDoverDracutDudleyDunstableDuxburyEast BridgewaterEast BrookfieldEast LongmeadowEasthamEasthamptonEastonEdgartownEgremontErvingEssexEverettFairhavenFall RiverFalmouthFitchburgFloridaFoxboroughFraminghamFranklinFreetownGardnerGeorgetownGillGloucesterGoshenGosnoldGraftonGranbyGranvilleGreat BarringtonGreenfieldGrotonGrovelandHadleyHalifaxHamiltonHampdenHancockHanoverHansonHardwickHarvardHarwichHatfieldHaverhillHawleyHeathHinghamHinsdaleHolbrookHoldenHollandHollistonHolyokeHopedaleHopkintonHubbardstonHudsonHullHuntingtonIpswichKingstonLakevilleLancasterLanesboroughLawrenceLeeLeicesterLenoxLeominsterLeverettLexingtonLeydenLincolnLittletonLongmeadowLowellLudlowLunenburgLynnLynnfieldMaldenManchesterMansfieldMarbleheadMarionMarlboroughMarshfieldMashpeeMattapoisettMaynardMedfieldMedfordMedwayMelroseMendonMerrimacMethuenMiddleboroughMiddlefieldMiddletonMilfordMillburyMillisMillvilleMiltonMonroeMonsonMontagueMontereyMontgomeryMount WashingtonNahantNantucketNatickNeedhamNew AshfordNew BraintreeNew MarlboroughNew SalemNewburyNewburyportNewtonNorfolkNorth AdamsNorth AndoverNorth AttleboroughNorth BrookfieldNorth ReadingNorthamptonNorthboroughNorthbridgeNorthfieldNortonNorwellNorwoodOak BluffsOakhamOrangeOrleansOtisOxfordPalmerPaxtonPeabodyPelhamPembrokePepperellPeruPetershamPhillipstonPittsfieldPlainfieldPlainvillePlymouthPlymptonPrincetonProvincetownQuincyRandolphRaynhamReadingRehobothRevereRichmondRochesterRocklandRockportRoweRowleyRoyalstonRussellRutlandSalemSalisburySandisfieldSandwichSaugusSavoyScituateSeekonkSharonSheffieldShelburneSherbornShirleyShrewsburyShutesburySomersetSomervilleSouth HadleySouthamptonSouthboroughSouthbridgeSouthwickSpencerSpringfieldSterlingStockbridgeStonehamStoughtonStowSturbridgeSudburySunderlandSuttonSwampscottSwanseaTauntonTempletonTewksburyTisburyTollandTopsfieldTownsendTruroTyngsboroughTyringhamUptonUxbridgeWakefieldWalesWalpoleWalthamWareWarehamWarrenWarwickWashingtonWatertownWaylandWebsterWellesleyWellfleetWendellWenhamWest BoylstonWest BridgewaterWest BrookfieldWest NewburyWest SpringfieldWest StockbridgeWest TisburyWestboroughWestfieldWestfordWesthamptonWestminsterWestportWestwoodWeymouthWhatelyWhitmanWilbrahamWilliamsburgWilliamstownWilmingtonWinchendonWinchesterWindsorWinthropWoburnWorcesterWorthingtonWrenthamYarmouth

Get Your Stretch Code Compliance Package

Contact HERS Rating Company for a free, no-obligation quote. Fast, accurate, RESNET-certified results across all 351 Massachusetts cities.

At HERS Rating Company, we are committed to providing the highest quality energy consulting services to homebuilders, architects, and developers across Massachusetts.

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573 Washington St Quincy, MA 02169 United States

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