Newton Section 5.13 Green Building & Passive House

Who Section 5.13 Applies To

Newton Zoning Section 5.13 (Sustainable Development Design) applies to special permit projects with 20,000 sq ft or more of new or substantially rebuilt floor area. They must be designed to LEED Silver or Gold, certified Passive House, or Enterprise Green Communities.

Written by Dominic Zammuto, RESNET-certified HERS Rater (#3385643) and Phius Certified Verifier, Multifamily Qualified (Phius ID 124235). Checked against City of Newton sources in November 2026. Zoning changes often, so confirm with the city or town before you design.

Item	Requirement
Projects covered	Construction or substantial reconstruction of buildings totaling 20,000 sq ft or more of gross floor area that also need a special permit
Green building standard	Designed to LEED Silver (LEED Gold over 50,000 sq ft), certification not required; or Passive House, certification required; or Enterprise Green Communities, certification not required
EV parking	10% of spaces with charging (up to 40) plus another 10% EV-ready, for new or rebuilt parking
Embodied carbon	Under 50,000 sq ft: structural materials. Over 50,000 sq ft: whole-building life-cycle assessment of structure and enclosure
Sustainability narrative	Envelope, energy loads, mechanical systems, renewables, and how the building could reach net zero later
No splitting	Adjoining sites under common control within 5 years count as one project

What the Passive House Route Needs at Each Stage

Unlike the LEED and Enterprise routes, the Passive House route requires actual certification.

Stage	Passive House documents Newton asks for
Special permit	Rating system checklist and narrative, sustainability narrative, the green building professional's credentials and signed affidavit
Building permit	Updated documents, plus the credentials of the Passive House rater/verifier and a letter of intent that they have been hired for on-site verification, and the Certified Passive House Consultant's credentials
Certificate of occupancy	Updated documents and the final testing and verification report from the Passive House rater/verifier

Newton and the Specialized Code

Specialized Code city

Newton has adopted the Specialized (Opt-In) Energy Code. Residential buildings over 12,000 sq ft must use the Passive House path in the building code anyway.

One standard, two rules

For most residential projects big enough for Section 5.13, the Passive House route lines up with what the energy code already requires.

Phius timing

Phius review takes time, so bring the Passive House rater and consultant in before the special permit filing, not after.

Smaller projects

Below 20,000 sq ft, Section 5.13 does not apply, but the Specialized Code still does: HERS ratings or Passive House for new homes.

See Phius Passive House verification and Specialized Code requirements.

How We Help in Newton

Check the rules before design is locked

We read the Newton requirement against your plans early and pick the cheapest pathway that passes.

Energy modeling

As a Phius Certified Rater and Verifier with a Certified Passive House Consultant in house, we can supply the rater/verifier letter of intent and consultant credentials Newton asks for at building permit, and the final verification report at the certificate of occupancy.

Documents for permits and review

We prepare the energy code paperwork for the building department and the energy numbers your architect or permitting team needs. HEEC does not do LEED; if your project needs LEED, your LEED consultant handles that part.

Testing and verification

We do the inspections, blower door and duct leakage testing and final verification with our own crew as a RESNET HERS Rater and Phius Certified Rater and Verifier (Multifamily Qualified).

More: Net zero and Passive House rules in other Massachusetts cities · Phius Passive House verification · Multifamily HERS, ENERGY STAR and Phius

FAQ: Newton Section 5.13

Which Newton projects have to meet Section 5.13?

Projects that need a special permit and include construction or substantial reconstruction of buildings totaling 20,000 sq ft or more of gross floor area.

Does Newton require Passive House?

Passive House is one of three choices under Section 5.13, along with LEED Silver or Gold and Enterprise Green Communities. Separately, as a Specialized Code city, Newton requires the Passive House path for residential buildings over 12,000 sq ft.

Does the building have to be certified?

Only on the Passive House route. LEED and Enterprise Green Communities projects must be designed to the standard, but certification is not required.

What does Newton need from the Passive House rater?

At building permit, the rater/verifier's credentials and a letter of intent showing they are hired for on-site verification; at the certificate of occupancy, the final testing and verification report.