Mass Save® pays serious money for high-performance new construction in 2026 — up to $25,000 for a single-family home and $40,000 for a four-unit building — but every dollar runs through one gate: your project must be enrolled and verified by an approved HERS rating company. Here are the current numbers, straight from the 2026 program brochures.
Single-family (1–4 units): three tiers
| Tier | Key requirement | 1 unit | 4 units |
|---|---|---|---|
| Base | All-electric, ≥15% savings above baseline | $7,500 | $11,250 |
| ENERGY STAR® NextGen | ≥30% savings or HERS ≤45; ≤1.5 ACH50; ERV/HRV | $15,000 | $22,500 |
| Passive House | Phius or PHI certification | $25,000 | $40,000 |
Adders: ground-source heat pump $9,000/unit · split-system heat pump water heater $750/unit · induction cooktop $250/unit · Wi-Fi thermostat $100/unit · DOE Zero Energy Ready certification $500/unit.
Multifamily (5+ units)
Low-rise buildings earn $1,500/unit (Base, ≥15% savings or HERS ≤45), $2,500/unit (ENERGY STAR MFNC v1.2), or $3,750/unit (Passive House); high-rise earns $1,000–$1,750/unit plus the $3,750 Passive House tier. Passive House projects also get a $5,000 feasibility study incentive and up to 75% of energy modeling costs ($20,000 project max). Whole-building infiltration testing adders pay up to $400/unit.
Renovations & additions
Major renovations (50%+ of the home) and additions of 500+ sq ft qualify: pay-for-savings up to $10,000 (Base) or $15,000 (All-Electric Base), then fixed tiers — Level 1: $20,000 (≥30% savings or HERS ≤55) and Level 2: $30,000 (≥50% savings or HERS ≤45, ≤3 ACH50, ERV/HRV, EV-ready) per single-family home, scaling to $60,000 on four-unit buildings. Whole-home heat pump adders reach $8,500 (air-source) and $13,500 (ground-source).
How to claim it
1) Contact an approved HERS rater before construction or demolition starts — the preliminary site visit registers your project. 2) Insulation inspection at mid-build. 3) Final inspection with blower door and duct testing. 4) Incentive check arrives 10–12 weeks after final inspection. We handle this entire Mass Save process from our Quincy and Ashland offices — HERS ratings, blower door and duct testing across all 351 Massachusetts cities. Get a free quote or call 617-584-1809.
Source: Mass Save 2026 Residential New Construction program brochures (single-family, multifamily 5+, and renovations & additions). Homes must be in Sponsor service territories; incentive terms subject to program rules.
