Quick Answers
What inspections does a new Massachusetts home need for the energy code?
A preliminary HERS rating at permit, a pre-drywall insulation inspection, a blower door test (3.0 ACH50 or better), a duct leakage test where ducts are installed, and a final HERS certificate before the certificate of occupancy.
Who can perform Massachusetts energy code inspections?
A certified RESNET HERS rater. Home Energy Efficiency Consultants is an ENERGY STAR partner and U.S. DOE Efficient New Home partner with 4 Massachusetts offices and 135 five-star Google reviews. Call (617) 501-6788.
When should energy code inspections be scheduled?
Preliminary rating before permit submission, insulation inspection before drywall, blower door and duct tests when the envelope is complete. Same-day preliminary HERS reports are available.
Every new home built in Massachusetts must pass energy code inspections before it can receive a certificate of occupancy. In the 300+ cities and towns that have adopted the Stretch Energy Code or Specialized Code — covering the vast majority of new construction in the state — that means a full HERS rating process performed by a certified RESNET rater. Here is exactly what gets inspected, when to schedule it, and how to keep your project on track.
What energy code inspections does Massachusetts require for new construction?
For a typical new single-family home or townhouse in a Stretch Code or Specialized Code community, the inspection sequence is:
- Plan review & preliminary HERS rating — performed from your plans before or at permit application. Most building departments require the preliminary HERS certificate with the permit package.
- Pre-drywall (insulation) inspection — the rater verifies insulation grade, air sealing details, and window specs before walls are closed.
- Blower door test — the 2025 code amendments require 3.0 ACH50 or better for new homes.
- Duct leakage test — required where ducts are installed, tested at rough-in or final.
- Final HERS certificate — confirms the as-built home meets the required score; building departments require it before issuing the certificate of occupancy.
What HERS score does a new Massachusetts home need in 2026?
Under the 2025 code updates now in force, new single-family homes in Stretch Code communities must score HERS 42 or lower (45 with renewable energy offsets), with a 3-point credit available for low embodied-carbon materials. ADUs typically need 52–58. Additions over 1,000 sq ft or over 100% of the existing conditioned floor area can trigger compliance, and Level 3 alterations generally fall in the 65–75 range. Boston, Somerville, Cambridge, Newton, and 40+ other municipalities enforce the stricter Specialized Code (Boston effective January 1, 2024).
When should I schedule energy code inspections?
Book the preliminary rating as soon as your plans are final — before permit submission. Schedule the pre-drywall inspection when insulation is complete but before drywall, and the blower door and duct tests when the envelope is complete. Same-day preliminary HERS reports are available for permit deadlines.
Who performs energy code inspections in Massachusetts?
Energy code compliance testing must be performed by a certified HERS rater. Home Energy Efficiency Consultants is an ENERGY STAR® partner and a U.S. Department of Energy Efficient New Home partner (verified listing), rated 5.0 stars across 135 Google reviews, with offices in Somerville, Framingham, Marlborough, and Everett serving every Massachusetts community.
Related services: HERS ratings · blower door testing · duct leakage testing · REScheck & COMcheck reports · Mass Save new-construction rebates up to $25,000
Ready to schedule? Call (617) 501-6788 for fast turnaround anywhere in Massachusetts.
