New Hampshire, Hillsborough County Remodeler Permit Regulations and County Ordinances for Unincorporated Areas

Hillsborough County, New Hampshire Remodeling and Renovation Permit Requirements

Hillsborough County, New Hampshire, has specific requirements for remodelers and renovation permits, with the Building & Safety Division acting as the Authority Having Jurisdiction (AHJ) for unincorporated areas. It's crucial for property owners and contractors to understand these regulations to ensure compliance and safety.

Unincorporated Areas

In Hillsborough County, properties located in unincorporated areas fall under the direct purview of the County's Building & Safety Division for permit and inspection requirements. This means that standard municipal building departments may not be the primary point of contact for these locations.

Demolition Work Permits

Demolition work during a remodel in Hillsborough County typically triggers a permit requirement. This is to ensure that demolition is conducted safely, with proper environmental controls (like asbestos abatement if applicable) and structural considerations in place. Specific triggers often include:

Any demolition that affects the structural integrity of the building.
Partial or complete demolition of load-bearing walls.
Removal of more than a certain percentage of the building's exterior.
Demolition involving hazardous materials.

Converting Non-Living Spaces

Altering or converting non-living spaces such as garages, attics, or unfinished basements into habitable living areas requires specific permits in Hillsborough County. These conversions involve significant changes to the building's structure, electrical, plumbing, and mechanical systems, and must meet current building codes for occupancy.

Definition of Habitable Space: Generally includes areas designed for living, sleeping, eating, or cooking, requiring adequate light, ventilation, egress, and insulation.
Permit Triggers: Any work that changes the use of a space from non-habitable to habitable, including adding electrical outlets, plumbing, insulation, or finishing walls and ceilings.
Code Compliance: These conversions must meet all applicable building, electrical, plumbing, and fire safety codes, including requirements for emergency egress from bedrooms.

Resources to Learn More

Note: The following state-wide building codes and regulations apply universally to all jurisdictions within New Hampshire, including Hillsborough County.

New Hampshire Remodeler Legislation, Codes, and Guidelines

New Hampshire Building Codes for Remodelers and Residential Renovations

New Hampshire adopts and enforces building codes based on the International Code Council (ICC) model codes. The primary codes relevant to remodelers and residential renovations are the International Residential Code (IRC) and the International Building Code (IBC), often with state-specific amendments.

1. Adopted State Statutes and Codes

New Hampshire has adopted the 2018 International Residential Code (IRC) and the 2018 International Building Code (IBC).
The state also adopts the International Fire Code (IFC) and the International Mechanical Code (IMC), among others.
While the International Existing Building Code (IEBC) is a model code, New Hampshire's approach to existing buildings is primarily addressed through the adopted IRC and IBC, with specific provisions for alterations, repairs, additions, and changes of occupancy.
Specific amendments and adopted codes can be found within New Hampshire's state statutes, particularly RSA 155-A.

2. Primary State Board or Agencies

The **New Hampshire Department of Safety, Division of Fire Safety, Bureau of Building Codes and Standards** is the primary state agency responsible for adopting, administering, and enforcing the state building codes.
Local building departments within municipalities are typically responsible for plan review, permitting, and inspections for most residential renovations.

3. Classification of Remodels and Demolition Guidelines

New Hampshire's codes generally distinguish between cosmetic improvements and structural alterations. Cosmetic remodels, such as painting or replacing flooring, typically do not require permits unless they involve changes to electrical or plumbing systems.
Structural alterations, including the conversion of attics or basements into habitable living spaces, additions, or significant changes to the building's structure or egress, will require permits and must comply with the current adopted codes.
Demolition guidelines are addressed within the adopted codes, particularly concerning safety during demolition, environmental concerns (like asbestos abatement), and the proper disposal of debris. Specific demolition permits are usually required, and the process often involves notifying utility companies and adhering to local ordinances.

Resources to Learn More

New Hampshire Department of Safety, Division of Fire Safety, Bureau of Building Codes and Standards: [https://www.nh.gov/safety/divisions/firesafety/building-codes/](https://www.nh.gov/safety/divisions/firesafety/building-codes/)
New Hampshire Revised Statutes Annotated (RSA) 155-A, Building Codes: [https://www.gencourt.state.nh.us/rsa/html/XII/155-A/155-A-mrg.htm](https://www.gencourt.state.nh.us/rsa/html/XII/155-A/155-A-mrg.htm)

Select a City in Hillsborough County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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