Manchester applies New Hampshire's adopted International Energy Conservation Code under RSA 155-D for new construction and major renovations, while leaving advanced green-building standards like LEED and Passive House to voluntary compliance by developers.
New Hampshire RSA 155-D requires statewide compliance with the latest adopted edition of the International Energy Conservation Code (IECC), and Manchester's Building Department enforces the IECC through Chapter 70 alongside the IBC and IRC. Compliance covers insulation, fenestration U-values, duct sealing, lighting power density, and mandatory blower-door and duct-leakage testing for new homes. Manchester does not impose a CALGreen-style mandatory green code or stretch energy code. Developers seeking LEED, Passive House, or NGBS certification do so voluntarily, sometimes with NH Saves utility incentives. Solar-ready provisions appear in newer IECC editions but adoption depends on the state cycle.
Failure to meet IECC during construction can block certificates of occupancy, trigger required reinsulation or duct sealing, and create utility billing disputes; falsified blower-door reports may bring contractor licensing action.
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Manchester, NH
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