Article written by John Galle, Corporate Law Attorney / New Hampshire Bar Association Bar News, May 2026
New Hampshire has taken a decisive step to override local zoning control in an effort to expand its housing supply. Effective July 1, 2026, New Hampshire will enact House Bill 631, establishing RSA 674:77-78 to allow multi-family residential development in commercially zoned districts as a matter of right across the State of New Hampshire. Under the new law, municipalities must permit residential uses in commercially zoned districts; provided only that adequate infrastructure such as roads, water, and sewer systems are available. In situations where buildings are converted to multi-family or mixed-use through adaptive reuse, the statute further requires municipalities to grant exemptions from local setback, height, and frontage requirements provided that the building’s existing floor area, height, and setbacks are not increased. It should be noted that House Bill 631 will not prohibit municipalities from restricting development in industrial or manufacturing zones that may be inherently incompatible with residential use due to their air, noise, odor, or transportation impacts.
Housing in New Hampshire has become increasingly expensive in recent years, as rising home prices and rents, combined with limited supply, have made it harder for many individuals and families to find suitable options. Homebuyers in New Hampshire face a difficult combination of record-high home prices, elevated mortgage rates, and above-average property taxes, requiring a household to earn roughly $158,000 annually to avoid being cost-burdened per the New Hampshire Fiscal Policy Institute. Yet, only about 27.49% of households meet that threshold, according to U.S. Census Bureau data published in 2024.
New Hampshire’s rental housing market also remains tight and increasingly expensive, driven in large part by a persistent shortage of available units. Per New Hampshire Housing, median rent prices for a two-bedroom apartment reached about $1,833 in 2024, up roughly 58% from 2015, while current estimates place average monthly rents well over $2,000. The latest data from the Federal Reserve Bank of St. Louis indicates that as of 2025, the rental vacancy rate remains at roughly 3.9%; still well below the 5% rate generally considered balanced by New Hampshire Housing Finance Authority. With limited supply pushing rental prices upward, nearly half of renters in the State are now considered cost-burdened, underscoring the strain on households and the broader imbalance between housing supply and demand.
House Bill 631 provides new opportunities for renters and developers alike by opening commercially zoned land to residential development. For developers and landlords, the law provides an alternative pathway to generate revenue by converting or redeveloping underutilized commercial space. The statute will likely increase the value of certain commercial properties, particularly those suitable for conversion or mixed-use redevelopment, by allowing them to support residential income streams and expanding the pool of potential buyers. Many properties in commercial zones include units that are poorly suited for retail or office use because they lack visibility, adequate layout, or proximity to high-traffic areas. However, these same units may be well-suited for residential occupancy. By allowing these spaces to be used for housing, the statute unlocks previously constrained inventory to ease the pressure on the rental market and creates a more flexible framework to incentivize developers to undertake these projects.
This flexibility has been limited under existing law, where municipalities retain broad control over land use through local zoning ordinances. In most cases, converting commercial property to residential use requires a variance, granted only if an applicant meets the strict criteria set forth in RSA 674:33, I(b). These standards are difficult to satisfy and are often compounded by concerns regarding traffic, parking, density, and neighborhood character. Even when relief is sought, zoning board decisions receive substantial deference on appeal and will be upheld unless unlawful or unreasonable, whether reviewed by the New Hampshire Housing Appeals Board or the Superior Courts. House Bill 631 largely removes this barrier by allowing such developments as a matter of right, eliminating the need for a variance in qualifying cases.
The law may not operate as intended in every circumstance. Although it permits “multi-family” residential development, that term is still defined by existing residential zoning frameworks, which may limit qualifying projects and exclude smaller or unconventional conversions. For example, a property owner seeking to repurpose unused space into housing for two families may find that the local ordinance defines multi-family as three or more units, in which case the statute would not apply. As a result, the law may not always align with its practical application at the local level and may tend to favor larger, purpose-built apartment developments over incremental reuse of smaller commercial spaces.
In addition, relevant projects must still demonstrate adequate supporting infrastructure, such as roads, water, and sewer systems, in order to be approved. Municipalities still may block residential developments if the commercially zoned areas also allow industrial or manufacturing uses because such uses may be deemed incompatible with residential use. Further still, many municipalities impose workforce housing requirements that mandate a portion of units be set aside pursuant to RSA 674:58-61. In practice, workforce housing requirements introduce additional administrative burdens and compliance costs that may discourage some developers.
This state-level action represents a departure from the traditional framework of local control by overriding municipal zoning authority to establish a right to residential development in certain commercial areas, reflecting the broader economic pressures shaping New Hampshire’s housing market. In doing so, the Legislature has effectively limited the discretion towns have historically exercised through zoning ordinances. This shift is significant as municipalities have long relied on zoning as their primary tool to preserve neighborhood character, manage growth, and maintain the aesthetic and historical identity of their communities. Consistent with the principle of subsidiarity, land use decisions have traditionally been made at the most immediate, local level, where officials are best positioned to respond to the specific needs and conditions of their communities. House Bill 631 alters that balance by prioritizing housing production over local control, creating an inherent tension between statewide housing objectives and municipal autonomy.
