Quick Answers
Do I need a HERS rating in Andover, MA?
Yes, in most cases. Massachusetts requires a HERS rating for new residential construction and for large additions or major renovations in communities that follow the Stretch or Specialized Energy Code. A preliminary HERS rating is typically needed for the building permit and a final rating for the certificate of occupancy.
What HERS score is required in Andover, MA?
Under the 2025 Massachusetts Stretch Code, new mixed-fuel homes need HERS 42 or lower and all-electric homes 45 or lower; an embodied-carbon credit for low-GWP insulation or concrete adds 3 points. Major additions and Level 3 renovations use separate targets (HERS 65-75) and ADUs 52-58. We confirm the exact path for your Andover project.
How much does a HERS rating cost in Andover, MA?
Most Massachusetts HERS ratings run from about $600 to $2,500 depending on the size and scope of the project. Call (617) 501-6788 for a free same-day quote for your Andover project.
How fast can I get a HERS rating in Andover?
We offer same-day scheduling and deliver reports in 24-48 hours. Home Energy Efficiency Consultants has completed 15,000+ HERS ratings statewide and holds a 5.0-star rating from 135 Google reviews.
HERS Rating Andover MA - Quick Facts
Local energy code in Andover
- Andover enforces the Massachusetts Stretch Energy Code for new construction and major renovations. IECC Climate Zone 5A.
- Massachusetts has three energy-code levels - base (2021 IECC), Stretch, and Specialized (Opt-In) - and Andover is on the Stretch Code.
What your project must hit in Andover
- A HERS rating is required in Andover for: new construction; additions over 1,000 sq ft (or greater than 100% of the existing conditioned floor area); and extensive Level 3 alterations over 1,000 sq ft affecting more than 50% of the conditioned floor area.
- New home, mixed-fuel (gas heat, hot water or cooking): must reach HERS 42 or lower.
- New home, all-electric: must reach HERS 45 or lower.
- Embodied-carbon materials credit: allows up to HERS 48.
- ADU, mixed-fuel (gas): HERS 52; ADU, all-electric: HERS 55; ADU with the embodied-carbon credit: HERS 58.
- Major additions and renovations: tiered HERS targets of roughly 52 to 75 depending on project scope.
- Air tightness: a blower door test at 3.0 ACH50 or tighter; duct leakage capped at 4 CFM25 per 100 sq ft when ducts run outside conditioned space.
- Also required in new homes: whole-house mechanical ventilation (ASHRAE 62.2) and EV-ready wiring; compliance runs through the HERS / Energy Rating Index path (2025 code section R406).
How compliance is verified
- Energy model from your plans, a pre-drywall (rough) inspection, blower door and duct leakage testing, then a final HERS certificate filed with the Andover building department.
- Same-day preliminary HERS reports; blower door and duct results in 24-48 hours, with fail-fix guidance if a home misses the target.
2026 Mass Save incentives in Andover
- 2026 Mass Save all-electric new construction: $7,500 (Base) to $15,000 (ENERGY STAR NextGen) to $25,000 (Passive House) per single-family home - up to $40,000 for a 4-unit.
- All-electric renovations and additions: up to $20,000 (Level 1) or $30,000 (Level 2) for a single-family, scaling to $60,000 for a 4-unit; projects that keep fossil fuel use pay-for-savings up to $10,000.
- New multifamily (5+ units): $1,000 to $3,750 per unit by tier (Base, ENERGY STAR, or Passive House), plus a $5,000 feasibility-study incentive and energy-modeling support.
- Stackable with the federal 45L tax credit, up to $5,000 per unit. All Mass Save incentives require verification by a Mass Save-approved, RESNET-certified HERS rater.
RESNET-certified · 15,000+ ratings completed · 5.0 stars across 135 Google reviews · (617) 501-6788
HERS Rating Andover MA
Andover has adopted the Massachusetts Specialized Stretch Energy Code, which sets tight HERS Index targets for new homes and major renovations and strongly encourages — though does not mandate — all-electric design. From custom homes and additions near Andover Center and Phillips Academy to new subdivisions along the Route 28 and I-93 corridors, careful energy modeling keeps a build on target. Home Energy Efficiency Consultants provides RESNET-certified HERS ratings for Andover projects, from early modeling through final blower-door and duct testing.
Why clients choose us
We help projects in Andover with energy code guidance, HERS documentation, practical field support, and clear communication from planning through completion.
HERS Rating Andover MA Services
Looking for HERS Rating Andover MA services? We provide certified HERS ratings for homes throughout Essex County, with support for new construction, additions, and major renovations.
We help projects in Andover meet Massachusetts energy code requirements with practical guidance on insulation, HVAC systems, ventilation, air sealing, and final project verification.
Serving homeowners, builders, and developers across Andover, Massachusetts, Home Energy Efficiency Consultants provides practical support from planning through project completion.
Best fit for projects like:
- New construction homes
- Additions and expansions
- Gut renovations
- Permit-driven energy compliance
- Projects needing HERS documentation
Learn more about home energy ratings, RESNET standards, and Mass Save programs.
HERS Rating Andover MA Project Support
HERS Rating Andover MA services help builders and homeowners plan for energy code compliance, documentation, and project completion.
Certified HERS Rating Andover MA
We provide HERS rating support for new homes, additions, and major renovations in Andover, Massachusetts.
Energy Code Guidance in Andover
Our HERS Rating Andover MA services help projects stay organized with practical guidance from planning through completion.
Why Choose Us for HERS Rating Andover MA
Strong communication, local knowledge, and practical project support.
- Massachusetts energy code experience
- Fast report turnaround
- Clear communication throughout the project
- Practical field support for builders and homeowners
- Trusted by clients across Massachusetts
HERS rating pricing in Andover depends on home size, design complexity, and project scope.
HERS Rating Andover MA Facts
Helpful answers for homeowners, builders, and developers planning a project in Andover.
Andover is a town in Essex County, Massachusetts, United States. It was settled in 1642 and incorporated in 1646. Andover is located in Essex County, Massachusetts. The 01810 area, like the rest of Massachusetts, sits in IECC climate zone 5A, which shapes insulation, air-sealing, and HVAC requirements for HERS rating and energy code compliance.
Where does HERS rating apply in Andover?
New construction, additions, and major renovations in Andover, Essex County are reviewed against the Massachusetts energy code, and a HERS rating is the standard way to document compliance.
What climate zone is Andover in?
Like all of Massachusetts, Andover is in IECC climate zone 5A, which sets the insulation, air-sealing, and mechanical-system targets a HERS rater verifies.
Do existing homes in Andover need a HERS rating?
Most existing homes only need a rating for major renovations, additions, or energy-code permits; new construction in Andover almost always requires one.
How does a HERS rating help Andover homeowners?
A lower HERS Index signals a more energy-efficient home, lower utility bills, and easier code compliance for projects in Andover.
What HERS score does new construction in Andover need?
Under the Specialized Stretch Energy Code, new construction must reach a HERS Index of 42 or lower (mixed-fuel) or 45 or lower (all-electric) — or 45/48 using the embodied-carbon trade-off — as of July 1, 2024. All-electric design is encouraged but not required in Andover, and a certified HERS rater verifies the final score.
What is a HERS Rating?
A HERS Rating measures the energy efficiency of a home and is commonly used for new construction, additions, and major renovations in Massachusetts.
Who may need one?
Builders, homeowners, and developers in Andover may need a HERS rating depending on project size, code path, and permit requirements.
Why local experience matters
Local experience helps ensure your project is reviewed with Massachusetts requirements, practical construction details, and real jobsite conditions in mind.
What the process may include
Depending on the project, the process may include plan review, energy modeling, field verification, and final testing support.
Our 5-Step HERS Rating Process in Andover
Every Andover build follows the same clear path with us, from the opening permit drawings straight through to the certificate that closes the job. Here is each stage of HERS verification in order.
Plan Review & Preliminary Report
We review your blueprints and produce the preliminary energy report your building permit requires before construction begins.
Equipment Consulting
Before anything is installed, we confirm your appliances and equipment are correct — a crucial step many companies skip, so you never buy the wrong system.
Mid-Point Inspection
We inspect during construction to make sure insulation is installed correctly and to the code requirements of your HERS report.
Final Testing
Blower-door testing, duct testing, and ERV balancing. ERV balancing is vital — done wrong it can cause pressure issues throughout your home.
Final Certificate
We send over the final certificate to close out your building permit and apply for your Mass Save rebates.
Andover and the Massachusetts Specialized Stretch Code
Andover sits in Essex County within Climate Zone 5A, and it follows the Specialized Stretch Code — the most demanding energy rulebook in Massachusetts, which layers electrification-readiness on top of the standard efficiency targets.
Solar-Ready (RB102)
Fresh construction in Andover has to reserve unobstructed roof space and run conduit ahead of time, so a future solar array drops in without tearing anything apart.
EV-Ready (RB103)
Electrical panel headroom and a reserved circuit get built in from the start, which makes wiring a Level 2 charger into an Andover garage fast and low-cost.
Talk directly with the owner
Owner and Mass Save partner Dominic Zammuto personally runs every Andover rating — you speak with the expert directly, never a call center. Ask anything about your project or the incentives you can claim.
Explore Mass Save RebatesWhat the HERS Index Means for Andover Homes
100 is the starting line
The benchmark house lands at 100, and each Andover home we certify is designed to settle well beneath that mark.
0 equals net-zero
Reaching zero on the scale means an Andover home generates every bit of energy it consumes — the high-water mark for efficient building.
About 1% per point
Drop just one point and energy use falls by about a percent — savings that land directly in an Andover homeowner’s budget.
How We Confirm Performance on a Andover Rating
- ✅ Energy modeling — before ground is broken we simulate the Andover home to project how each space will consume energy.
- ✅ Blower-door testing — a precision fan measures just how well the completed Andover home holds its air.
- ✅ Duct-leakage testing — we quantify the conditioned air escaping the ducts so none of it is squandered.
Connecting HERS and the Stretch Code in Andover
- ✅ Andover starts from the IECC 2021 baseline and stacks the tougher Massachusetts energy requirements above it.
- ✅ Your required HERS number hinges on fuel type — all-electric houses and mixed-fuel houses each answer to their own threshold.
- ✅ We link your rating to Mass Save incentives and the official Mass.gov stretch code rules.
Rebates, Turnaround & What to Expect in Andover
Real rebate potential
Qualifying Andover builds can unlock meaningful Mass Save rebates, and we assemble the paperwork so those dollars actually reach you.
Fast turnaround
Andover timelines rarely have slack, so we turn reports and certificates around quickly to keep the project moving.
Certified & local
You work with a certified rater who understands how Essex County homes are actually built — not a distant clerk shuffling spreadsheets.
Experience & Track Record in Andover
Experience carries weight in Andover — you are handing someone the job of certifying your home’s performance, and ours comes from an owner who has built and inspected for decades.
Construction experience
Years spent on Andover job sites keep our energy guidance rooted in real construction rather than tidy theory on paper.
Unrestricted CSL License
Holding an Unrestricted Construction Supervisor License means we stay conversant with every Andover code demand, framing through mechanicals.
Certified & Mass Save partner
RESNET credentials paired with Mass Save partnership deliver an Andover rating that passes inspection and releases rebates smoothly.
Our Massachusetts Service Locations
Serving clients from our Massachusetts locations in Everett, Somerville, and Framingham.
Everett Location
371 Main St
Everett, MA 02149
Somerville Location
519 Broadway
Somerville, MA 02145
Framingham Location
68 South St
Framingham, MA 01702
Trusted for HERS Rating Andover MA
Real customer feedback helps show the level of service clients expect from Home Energy Efficiency Consultants.
Eleni Kaplan
Google Review
“Dominic got us 50k back on a 3 family we renovated through the HERS rating! We will definitely be using him for future projects. He’s a huge team player — we highly recommend him.”
Kevin McLaughlin
Google Review
“We were working on a house renovation and needed a HERS rating to get our permit. Dominic was very knowledgeable, extremely professional, and efficient.”
Luis Maldonado
Google Review
“If you’re looking for a reliable HERS rating company, this is it. Professional, knowledgeable, and efficient. They also helped me secure rebates I didn’t even know were available.”
Valentina Valencia Valencia
Google Review
“Best decision I made was hiring Home Energy Efficiency Consultants LLC. Their attention to detail and willingness to answer all my questions made the process stress-free.”
Lee Kravetz
Google Review
“I worked with Dominic on my HERS rating. He was knowledgeable and helped me through each step of making sure I got things right on my build.”
mike cartolano
Google Review
“Super Fast and Great Price ..great Communication”
Follow Home Energy Efficiency Consultants
Connect with us across social platforms for projects, updates, and energy code support.
Related HERS Rating Andover MA Services
Helpful internal links for users and search engines.
Nearby HERS Rating Andover MA Areas We Serve
We also provide HERS rating services near Andover and throughout Massachusetts.
FAQ About HERS Rating Andover MA
Common questions about HERS ratings in Andover, Massachusetts.
What is a HERS rating?
A HERS (Home Energy Rating System) rating is the national industry standard for measuring a home's energy efficiency. A certified HERS Rater reviews the plans and performs on-site inspections and testing, including a blower door test, to produce a score. Lower is better: a standard new home built to 2006 code scores 100, while a net-zero home scores 0.
What is a good HERS score?
Any score below 100 beats a standard new home, and the lower the number the more efficient the home. A score of 50 means the home is about 50% more efficient than a standard new build, while older unimproved homes often score 130 or higher. Massachusetts code targets are now well below 100.
How have Massachusetts HERS requirements changed in recent years?
Massachusetts has steadily tightened the maximum allowable HERS score. The required score for new homes was around 55 in 2022, dropped to 52 in 2023, and tightened to HERS 42 for mixed-fuel homes and 45 for all-electric homes as of July 1, 2024. The 2023 update also adopted the 2021 IECC as the base code and removed the earlier 5-point HERS credit for rooftop solar, pushing toward efficiency and electrification.
How much does a HERS rating in Andover cost?
A HERS rating in Andover typically costs:
- Single-family homes: $1,850–$2,500
- Accessory dwelling units (ADUs): $1,600–$1,850
- Multifamily: $900–$1,450 per unit
Final pricing depends on home size, complexity, and the number of required site visits.
What HERS score do I need to pass in Andover?
As of July 1, 2024, new construction needs a HERS 42 for homes using any fossil fuel and a HERS 45 for all-electric homes, verified by a certified RESNET HERS rater. Low-emission concrete comes in around 45 with gas or 48 all-electric, an ADU is 55 all-electric or 52 with gas, and multifamily matches the single-family requirement.
What triggers a HERS rating in Andover?
New construction almost always requires one. Under energy code Section R502, an addition triggers a HERS rating when the added conditioned floor area exceeds 1,000 square feet or doubles the size of your existing conditioned space (more than 100% of the existing conditioned floor area), requiring the combined dwelling to meet the maximum HERS ratings in Table R406.5.
Do renovations or alterations require a HERS rating?
They can. Under Section R503, extensive alterations (or IEBC Level 3 alterations) that exceed 1,000 square feet or double the size of the existing conditioned space (over 100% of the existing conditioned floor area) must meet the maximum HERS ratings in Table R406.5. Smaller alterations must still meet component requirements for insulation, replacement windows, water heating, and lighting.
Do I need a HERS rating in Andover?
If Andover has adopted the Massachusetts Stretch Energy Code, then yes for new homes, larger additions, and extensive renovations. A certified HERS rater can confirm whether your specific project triggers the requirement.
What kind of windows do I need to meet the new energy code?
All-electric homes favor a U-value of .25/.26 with an SHGC of .42 or higher, while gas homes favor tighter values. For replacements specifically, Section R503.1.1.1 requires new units, including sash and glazing, to meet the U-factor and SHGC in Table R402.1.3.
What kind of insulation do I need to pass a HERS rating?
You generally need around R-21 to R-30 depending on whether you go gas or all-electric.
What if I do not want to use spray foam?
You can use exterior insulation and then use mineral wool inside the wall.
How can I build to energy code in a cost-effective way?
Using low-emission concrete can reduce the HERS score by about 3 points, saving close to $20k or more between systems and upgrades.
What is an ERV system and do I need it in Andover?
Yes, it is now required by code. You can use an ERV or HRV to satisfy the requirement for balanced mechanical ventilation.
How much CFM do I need for my ERV?
It is based on bedrooms, square footage, and insulation volume, along with the ACH from your blower door test.
What do I need to start a HERS rating?
You need a set of architectural plans and to know whether you will go gas or all-electric.
How can I improve my score and what affects my score?
Your score is affected by windows, insulation, HVAC, and appliances such as the washer, dryer, dishwasher, and fridge.
Does a HERS rating add value to my home?
Yes. Energy-efficient HERS-rated homes have been shown to sell at a premium over comparable standard homes, on top of ongoing savings from lower utility bills.
Are there rebates for a HERS rating in Andover?
Yes. Working with a certified HERS rater can unlock Mass Save incentives for new construction and renovations.
Where can I find a HERS rater near Andover?
We are a certified RESNET HERS rater serving Andover and the surrounding area. We provide HERS ratings for new construction, additions, and renovations.
HERS Score Requirements in Andover by Year
Massachusetts Stretch Energy Code HERS thresholds have tightened over time. These are the maximum HERS Index scores required to pass for new construction, based on when the building permit was filed.
| Building type | New construction (permits after July 1, 2024) | New construction with embodied carbon credit | Accessory Dwelling Units | Major alterations, additions, or change of use |
|---|---|---|---|---|
| Mixed-Fuel Building | HERS 42 | HERS 45 | HERS 52 | HERS 65 |
| Solar Electric Generation | HERS 42 | HERS 45 | HERS 55 | HERS 70 |
| All-Electric Building | HERS 45 | HERS 48 | HERS 55 | HERS 70 |
| Solar Electric & All-Electric Building | HERS 45 | HERS 48 | HERS 58 | HERS 75 |
Curious why the numbers keep dropping? Massachusetts has ratcheted its HERS thresholds lower with each passing year — easing down from roughly 55 to 52 and settling near 42 for fossil-fuel houses and 45 for all-electric houses in Andover. Every step nudges new homes nearer to net-zero, which is exactly why getting the modeling right early pays dividends on an Andover build.
Note: HERS requirements are set by the Massachusetts Stretch and Specialized Energy Codes and can change with code updates. Figures reflect the current code at the time of writing.
Mechanical Ventilation Requirements in Andover
Hitting a low HERS Index in Andover means building a very airtight, well-insulated home — and a tight home needs controlled mechanical ventilation to stay healthy. The energy code pairs air-sealing with a whole-house ventilation system so fresh air is delivered on purpose rather than through random leaks.
Continuous whole-house ventilation
A whole-house system runs continuously and is sized to ASHRAE 62.2. The minimum airflow follows code equation R403.6: Q = 0.03 × CFA + 7.5 × (Nbr + 1) − 0.052 × Q50 × S × WSF, where CFA is conditioned floor area, Nbr is the number of bedrooms, S is the building-height factor, and WSF is the shielded weather factor for the county. The blower-door result converts with Q50 = (V × 2·ACH50) / 60, using conditioned volume V.
Balanced ERV / HRV
In our cold climate (zone 5A), balanced heat- or energy-recovery ventilation is the practical way to hit a low HERS score. An ERV or HRV supplies fresh air and exhausts stale air while recovering most of the heat between the two streams, so ventilation does not wreck the energy target.
Local exhaust
Kitchens and bathrooms still need local spot exhaust in addition to the whole-house system — vented to the outdoors, not into an attic or crawlspace — to remove moisture and cooking pollutants at the source.
Source: Massachusetts 2025 Stretch & Specialized Codes Technical Guidance (residential ventilation — IRC M1505 / ASHRAE 62.2).
EV-Ready Requirements in Andover
New homes in Andover must be wired so an electric-vehicle charger can be added later without opening up finished walls. Under the Massachusetts Stretch Code, “EV-Ready” means the rough electrical infrastructure is in place at the time of construction — here is what that involves.
Dedicated circuit
A 40-amp, 208/240-volt branch circuit is reserved for each dwelling’s parking space, sized to run a Level 2 charger.
Panel capacity
Electrical-panel space and labeled capacity are reserved so a future Level 2 charger can be added without a service upgrade.
Conduit & outlet
A raceway or conduit is run to the parking area so the charger installs quickly when the homeowner is ready.
Source: Massachusetts 2025 Stretch & Specialized Codes Technical Guidance (EV-Ready / Section R404.4).
Mass Save Rebates & Incentives
The tables below map out the Mass Save incentives available to Andover projects. Ground-up construction and major remodels sit on separate incentive tracks, and the payout grows the further your HERS score dips beneath the required mark — a leaner Andover home earns a larger rebate. We handle the energy modeling and the filing so your project collects every dollar available.
A HERS rating can unlock Mass Save incentives for eligible projects in Andover. Incentives are available for both new construction and for renovations and additions. Actual amounts depend on project type, number of units, efficiency level, and program eligibility.
New Construction Incentives (Single-family, 1-4 units)
| Path | Single Family | 2-Unit | 3-Unit | 4-Unit |
|---|---|---|---|---|
| Base (all-electric) | $7,500 | $8,750 | $10,000 | $11,250 |
| ENERGY STAR (30%+ savings or HERS 45) | $15,000 | $17,500 | $20,000 | $22,500 |
| Passive House | $25,000 | $30,000 | $35,000 | $40,000 |
Incentives up to $25,000 are available for the construction of single-family homes.
Renovations & Additions Incentives (Single-family, 1-4 units)
| Tier | Incentive |
|---|---|
| Base | Pay-for-Savings ($0.30/kWh + $30/MMBtu + savings x $2,500); up to $10,000 total |
| All-Electric Base | Pay-for-Savings ($0.40/kWh + savings x $3,000); up to $15,000 total |
| Level 1 | Single-family $20,000; 2-unit $30,000; 3-unit $40,000; 4-unit $50,000 |
| Level 2 | Single-family $30,000; 2-unit $40,000; 3-unit $50,000; 4-unit $60,000 |
Eligibility: projects within Sponsor electric service territory. Renovations must be extensive (about 50% or more of the original home) or additions of at least 500 square feet. Full terms and conditions are available on the Mass Save website. Incentive programs can change.
Get Started With HERS Rating Andover MA
Contact Home Energy Efficiency Consultants today for certified HERS ratings and project support in Andover, Massachusetts.
HERS Ratings Across Andover and Nearby Communities
Home Energy Efficiency Consultants rates new homes, additions, and major renovations throughout Andover — including Andover Center, Shawsheen Village, Ballardvale, and West Andover. Every Andover project is filed with the Town of Andover Building Division, and we handle the energy model, blower door and duct leakage testing, and the compliance paperwork from start to finish.
We also serve the communities right around Andover, including North Andover, Lawrence, Tewksbury, Wilmington, and Reading. Our Everett office at 371 Main St is the closest of our four Massachusetts locations — see our Everett office or call (617) 501-6788 to get a Andover rating on the schedule.
Andover Specialized Energy Code — HERS Index Targets
Andover enforces the Massachusetts Specialized (Opt-In) Energy Code. The required HERS score depends on fuel type and project scope — a lower index is stricter.
| Project type | Mixed-fuel | Mixed-fuel + solar | All-electric | All-electric + solar |
|---|---|---|---|---|
| New construction | HERS 42 | 42 | 45 | 45 |
| New construction — embodied-carbon credit | 45 | 45 | 48 | 48 |
| Accessory dwelling unit (ADU) | 52 | 55 | 55 | 58 |
| Major alteration / renovation / change of use | 65 | 70 | 70 | 75 |
A HERS rating is triggered by new construction, additions over 1,000 sq ft (or more than 100% of the existing conditioned area), and Level 3 alterations over 1,000 sq ft affecting more than 50% of the home. New homes must also pass a blower-door test at 3.0 ACH50 and include electrification-ready wiring for heat pumps, EV charging, and solar. We model your Andover project up front so you know the exact target and the fastest path to hit it — call (617) 501-6788.
More Massachusetts Towns We Serve
Certified HERS ratings, blower door testing and energy code compliance across all 351 Massachusetts cities and towns.
Andover Enforces the Massachusetts Specialized Code
Andover is one of just 60 Massachusetts municipalities (as of June 2026) that have adopted the Specialized opt-in energy code — the state’s most demanding standard, covering about a third of Massachusetts residents. For new homes in Andover this means the full HERS pathway — HERS 42 for mixed-fuel homes, 45 for all-electric (48 with the embodied carbon credit) — plus electrification-ready wiring requirements that go beyond the standard Stretch Code used in most of the state.
Practical impact for Andover projects: plan for a blower door result of 3.0 ACH50 or better, balanced ERV/HRV ventilation, and either all-electric mechanicals or wiring sized for future electrification. Our raters work in Andover regularly — see the full inspection sequence or call (617) 501-6788 for a same-day preliminary HERS report.
