New Hampshire 2026 Regular Session

New Hampshire House Bill HB1136

Introduced
12/1/25  
Refer
12/1/25  

Caption

Relative to accessory dwelling units.

Impact

The bill could significantly alter state housing laws by standardizing the regulations surrounding ADUs across municipalities. It clearly delineates responsibilities regarding zoning, building permits, and occupancy requirements, which would promote greater acceptance and integration of ADUs into existing neighborhoods. Moreover, the bill expands standards relating to ingress and egress for ADUs and modifies existing septic regulations, which could enhance the viability of installing such units in various local contexts while ensuring public health standards are upheld.

Summary

House Bill 1136 aims to address the regulation of accessory dwelling units (ADUs) in New Hampshire. The bill permits municipalities to authorize ADUs as a matter of right, conditional use permits, or special exceptions, thereby enhancing the flexibility around housing options for residents. Municipalities would also have the authority to allow more than one ADU per single-family home, reflecting a trend towards increasing housing availability in urban areas. Additionally, the bill clarifies that if a zoning ordinance lacks provisions for ADUs, one will automatically be deemed permitted, simplifying the process for homeowners looking to expand their living spaces.

Sentiment

Sentiment around HB 1136 appears to be mixed. Proponents highlight the movement towards increased housing options in a time when affordability and accessibility are pressing concerns in many communities. They argue that ADUs provide valuable solutions for families, aging relatives, and even affordable housing options, particularly in urban areas. However, there are concerns raised by opponents who believe that the proliferation of ADUs could lead to zoning conflicts, changes in neighborhood character, and increased density that may not be welcome in certain communities.

Contention

Notable points of contention include discussions on municipal authority versus state mandates regarding zoning ordinances. Some local governments express concerns about losing control over land use decisions, fearing that broad state legislation may impose unwanted housing structures in their communities. Furthermore, the bill allows municipalities to set aesthetic standards for ADUs but only correlatively applied with the main dwelling unit, which could lead to debates on community cohesiveness and aesthetic integrity as new housing structures are introduced.

Companion Bills

No companion bills found.

Previously Filed As

NH HB604

Relative to a loan forgiveness program for low-income homeowners to build new accessory dwelling units or renovate existing structures into accessory dwelling units.

NH HB577

Relative to modifying the definition of ADUs.

NH HB457

Relative to zoning restrictions on dwelling units.

NH SB27

Relative to dwellings over water.

NH HB428

Relative to the state building code.

NH HB623

Relative to prohibiting corporations from purchasing single-family homes for a certain amount of time.

NH SB170

Relative to development and related requirements in cities, towns, and municipalities.

NH HB382

Repealing the requirement that vehicle funding loan contracts have successive periodic payments that are substantially equal in amount.

NH HB631

Permitting residential building in commercial zoning.

NH HB186

Relative to the legalization and regulation of cannabis and making appropriations therefor.

Similar Bills

CA AB1154

Junior accessory dwelling units.

CA SB9

Accessory Dwelling Units: ordinances.

NJ A3488

Concerns development of accessory dwelling units and related municipal land use regulations.

CA AB2127

Accessory dwelling units: private sewage disposal systems.

CA AB956

An act to amend Section 50515.

CA AB1055

Accessory dwelling units: proof of residential occupancy requirements.

NH HB577

Relative to modifying the definition of ADUs.

AZ HB4028

accessory dwelling units; requirements