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If you are building, adding on, or renovating in Massachusetts, one of the first questions is whether your project needs a HERS (Home Energy Rating System) rating. This 2026 guide...

HERS rating costs in Massachusetts range from $600–$2,500. Learn what affects pricing, what's included, and how Mass Save rebates and 45L tax credits offset the cost.

Learn what blower door testing is, why it's required in Massachusetts, and what to expect during the test. Essential guide for MA builders and homeowners navigating the stretch energy code.

Massachusetts’ 2024 Affordable Homes Act made accessory dwelling units buildable by right in single-family zones statewide, and ADU permits have surged since. What many owners and builders discover mid-project: ADUs...

Rooftop solar isn’t just a utility-bill decision in Massachusetts anymore — it’s a code-compliance tool. Because the HERS index counts on-site generation, a photovoltaic array directly lowers a home’s score,...

Massachusetts’ 2025 stretch and specialized codes quietly put a thumb on the scale for electrification: an all-electric home only has to hit HERS 45, while a mixed-fuel home (gas heat,...

Build a Massachusetts home tight enough to pass the required blower door test (3.0 ACH50 or better) and it no longer breathes on its own — mechanical ventilation isn’t optional,...

The Massachusetts 2025 stretch and specialized codes offer a 3-point HERS credit when a home’s insulation package has a calculated Global Warming Potential (GWP) intensity below 0 kg CO2e per...

Massachusetts’ 2025 stretch and specialized energy codes did something no previous code cycle did: they put a number on the carbon in your concrete — and they pay you for...

REScheck vs COMcheck: The Key Difference REScheck is for residential buildings. COMcheck is for commercial buildings. Both are energy compliance rep