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State research · updated July 2026

Replacement Windows in New Hampshire

Current incentive status, energy-code requirements, and local market research for New Hampshire homeowners replacing windows and doors.

Rebates & incentives

The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.

New Hampshire's IRA Home Energy Rebates are administered by the New Hampshire Department of Energy. As of mid-2026 the Home Electrification and Appliance Rebates (HEAR) track was expected to launch mid-summer 2026 (not yet open to projects started before official launch), and the Home Efficiency Rebates (HOMES / HER) whole-home track was still awaiting federal funding and guidance — so neither path was a dependable consumer rebate for windows yet. Windows would generally fit only inside a whole-home modeled-savings project when HOMES opens. Confirm current status at energy.nh.gov before promising rebate money.

  • NHSaves (utility efficiency programs). NHSaves is the statewide efficiency brand of New Hampshire's electric and gas utilities (Eversource, Unitil, New Hampshire Electric Cooperative, and Liberty). Rebates and services focus on home energy assessments, insulation and air sealing, heat pumps, and appliances — not a reliable standalone per-window rebate. A no- or low-cost assessment is still worth scheduling before a large envelope project. Confirm current offers at nhsaves.com. (NHSaves (nhsaves.com); New Hampshire utility partners)

Energy code

New Hampshire adopts a statewide energy code based on recent IECC editions (historically lagging the newest model code — confirm the edition enforced by your local building official). Southern New Hampshire (including Manchester) is IECC climate zone 5A; ENERGY STAR Northern targets call for a U-factor of 0.22 or lower under Version 7.0. New Hampshire has no state sales tax or broad-based income tax — that can affect the after-tax cost conversation, but it does not replace federal or utility incentive paperwork.

Local market research in New Hampshire