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

New Hampshire Remodeling and Renovation Permit Requirements for Sullivan County

In New Hampshire, building permits are generally required for most construction, alterations, and major system installations. Each municipality administers its own permitting process, though all must enforce the State Building Code (RSA 155-A), which adopts versions of the International Building Code (IBC) and International Residential Code (IRC).

1. Authority Having Jurisdiction: Building & Safety Division

New Hampshire does not have a statewide building permit approval system. Instead, each municipality is responsible for issuing building permits and enforcing codes through its local building department or code enforcement officer (CEO). For Sullivan County, this means you will need to contact the specific town or city within the county where your property is located to determine their exact requirements and procedures.

2. Rules for Properties in Unincorporated Areas

New Hampshire has very few unincorporated areas, which are primarily located within the White Mountain National Forest. For these areas, county commissioners hold responsibilities and powers for planning and zoning regulations. If your property is in an unincorporated area of Sullivan County, you would need to contact the Sullivan County Commissioners' office for guidance on building permit requirements.

3. Specific Permit Triggers for Demolition Work During a Remodel

Demolition permits are typically required for the razing or removal of primary structures. Additionally, permits may be needed for accessory structures with utility systems, hazardous materials, or foundations. If a remodel involves a substantial amount of demolition, a demolition permit will likely be required in conjunction with a building permit for the renovation. Requirements often include an asbestos report, a grading plan for larger demolitions, and proof of utility disconnection.

4. Permit Requirements for Altering or Converting Non-Living Spaces

Converting non-living spaces such as garages, attics, or unfinished basements into habitable living areas generally requires a building permit. This is considered a change in occupancy type and involves creating new habitable space, which triggers permit requirements.

Garages: Converting a garage into a living space, such as a home office, in-law suite, or bonus room, requires a building permit. This often involves structural changes, and electrical and plumbing work, all of which necessitate permits.
Attics: Finishing an attic into habitable space (e.g., bedrooms, living areas) is a project that almost certainly requires a permit.
Basements: Finishing an unfinished basement into habitable space also requires a building permit. This process involves ensuring compliance with codes for ceiling height, egress windows, heating, insulation, ventilation, and potentially combustion air for fuel-burning appliances.

Resources to Learn More

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

Help Us Improve This Guide

Did you find a dead link, or do you have the direct link to the Sullivan County permit application portal? Help us keep this information accurate by submitting an update.