New Hampshire, Coos County HVAC Permit Regulations and County Ordinances for Unincorporated Areas
Coos County Building and Safety Jurisdiction
Coos County does not have a county-wide building department that oversees all construction. In New Hampshire, building permit authority is primarily managed at the municipal level. If your property is located within an incorporated city or town, you must contact that specific municipality's building department or code enforcement office to determine their local permit requirements for HVAC and other construction work.
Rules for Properties in Unincorporated Areas
For properties located in the unincorporated places of Coos County (such as Dixville, Millsfield, Odell, and Second College Grant), the Coos County Planning Board serves as the governing authority. While the county administers zoning, site plan review, and subdivision regulations for these areas, it is essential to verify specific building permit requirements directly with the Coos County Planning Board. Even in areas without local code enforcement, property owners are still required to comply with the New Hampshire State Building Code. In municipalities or areas without a local code enforcement mechanism, the New Hampshire State Fire Marshal's Office may have jurisdiction over certain aspects of construction and safety.
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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within New Hampshire, including Coos County.
New Hampshire Hvac Legislation, Codes, and Guidelines
State-Level Building Codes for HVAC in New Hampshire
The State of New Hampshire maintains a statewide building code, which includes specific standards for mechanical and energy systems. As of the most recent updates, the state has adopted the 2021 editions of the International Code Council (ICC) model codes, with the exception of the energy code, which remains at the 2018 edition. These codes are adopted by reference under New Hampshire Revised Statutes Annotated (RSA) Chapter 155-A.
The primary codes governing HVAC installations in New Hampshire include:
- International Mechanical Code (IMC) 2021: Governs the design, installation, and maintenance of mechanical systems, including heating, ventilation, and air conditioning.
- International Residential Code (IRC) 2021: Provides requirements for mechanical systems in one- and two-family dwellings and townhouses.
- International Energy Conservation Code (IECC) 2018: Sets the energy efficiency standards for building envelopes and mechanical systems, including HVAC equipment.
These codes are applied with specific New Hampshire amendments, which are reviewed and recommended by the state board and ratified by the legislature. It is important to note that local municipalities may have additional requirements or stricter standards, and some jurisdictions may not have local building code enforcement, in which case the State Fire Marshal's Office may have jurisdiction.
Primary State Board and Agencies
The administration and oversight of the state building code are managed by the following entities:
- State Building Code Review Board (BCRB): This board is responsible for reviewing model codes, recommending legislation to adopt or amend these codes, and hearing appeals related to the application and enforcement of the state building code.
- New Hampshire Division of Fire Safety: Works in conjunction with the building code process, as the state building code and state fire code are closely linked in New Hampshire.
- Office of Professional Licensure and Certification (OPLC): Through the Board of Mechanical Safety and Licensing, this office oversees the licensing of fuel gas fitters and mechanical businesses, which is a critical component for professionals working on gas-fired HVAC systems in the state.
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