If you are building or renovating a home in Massachusetts, a HERS rating is almost certainly on your permit checklist — and the first question everyone asks is what it costs. Here is the straight answer from a RESNET-certified rating firm that has completed more than 15,000 ratings across the state: most Massachusetts HERS ratings run $600 to $2,500, and the exact number depends on your project type and size. This guide breaks down 2026 pricing, what is included, and how a rating usually pays for itself.
What Is a HERS Rating?
A HERS (Home Energy Rating System) rating is an independent measurement of a home\u2019s energy efficiency. Certified HERS raters evaluate insulation, windows, HVAC systems, and air sealing, then verify performance with blower door and duct leakage testing and assign a numerical score — the lower, the better. In Massachusetts, HERS ratings are required for new construction and major renovations under the Stretch Energy Code, and they unlock Mass Save rebates and the federal 45L tax credit.
2026 HERS Rating Pricing in Massachusetts
| Project type | Typical price |
|---|---|
| Accessory dwelling units (ADUs) | $1,600\u2013$1,850 |
| Single-family new construction | $1,850\u2013$2,500 |
| Multifamily | $900\u2013$1,450 per unit |
| Small additions & simple projects | from $600 |
| Duct leakage test (first ducted system) | from $350 |
| REScheck report (residential prescriptive path) | from $300 |
| COMcheck report (commercial) | from $600 |
Every quote is flat-rate with no surprises. Call (617) 501-6788 for an exact number for your plans — preliminary HERS reports are available the same day.
What Affects the Price
- Project size — a 1,500 sq ft home costs less to model and test than a 4,000 sq ft custom build
- Project type — new construction, addition, ADU, or renovation
- Number of site visits — rough-in (pre-drywall) and final inspections
- Testing scope — blower door is always included; duct leakage testing applies when ducts run outside conditioned space
- Turnaround — standard vs. expedited scheduling
What Is Included
- Energy modeling with REM/Rate from your architectural plans
- Blower door testing (3.0 ACH50 target for new construction)
- Duct leakage testing where required (max 4 CFM25 per 100 sq ft)
- Pre-drywall rough inspection
- Final HERS certificate for your building permit
- Energy code compliance documentation filed with your local building department
What HERS Score Do You Need in 2026?
Under the 2025 Massachusetts Stretch Code amendments, new mixed-fuel homes must score HERS 42 or better and all-electric homes HERS 45 or better. ADUs are allowed HERS 52 (mixed-fuel) to 55 (all-electric), and major additions or renovations fall into tiers between roughly HERS 52 and 75 depending on project scope. Towns that adopted the Specialized (Opt-In) Code layer stricter electrification provisions on top.
Does a HERS Rating Pay for Itself?
Usually, yes. A qualifying rating can unlock Mass Save rebates of up to $25,000, the federal 45L tax credit of up to $5,000 per unit, and 20\u201340% lower energy bills for the homeowner. On most projects the incentives alone exceed the cost of the rating many times over.
Frequently Asked Questions
How long does a HERS rating take?
Preliminary reports are available the same day you send plans; blower door and duct test results are delivered within 24\u201348 hours of testing.
Is a HERS rating required for my permit?
If you are building new or doing a major renovation in one of the 300+ Massachusetts Stretch Code municipalities, yes — the performance path to code compliance runs through a HERS rating.
What happens if my home misses the target score?
We provide fail-fix guidance: the model shows exactly which improvements (air sealing, insulation, equipment) close the gap at the lowest cost before retesting.
Cities We Serve
We provide HERS ratings across Massachusetts including Boston, Cambridge, Worcester, Springfield, Newton, Framingham, Lowell, and Quincy — plus every town in between, from our four offices statewide.
