Layla Zulfa
Idaho Governor Brad Little has enacted a significant legislative package designed to confront the state’s escalating housing affordability challenges. The sweeping reforms, which saw their final approval through the governor’s signature, represent a concerted effort by state lawmakers to move beyond a fragmented approach to housing policy. The legislation seeks to empower local governments with greater flexibility in implementing "missing middle" housing solutions while simultaneously reallocating certain zoning control at the state level. This move comes as Idaho, like many other Mountain West states, grappled with a substantial population influx during the COVID-19 pandemic, a demographic shift that significantly outpaced the available housing supply.
The surge in new residents, often comprising remote workers relocating from higher-cost states like California and New York, injected considerable buying power into the Idaho market, driving up housing prices to levels that have become increasingly inaccessible for the average resident. While some Sun Belt and Mountain West cities experienced a cooling effect as return-to-office mandates prompted a migration back to coastal urban centers, Idaho’s housing market has not seen a similar deceleration. Hollie Conde, a fellow at the Sightline Institute, noted to The Builder’s Daily that "So far, they have kept their jobs," referring to the remote workers who fueled much of the demand. She further observed the changing demographics within the state legislature itself, remarking, "It’s come so far that we have people in the legislature that have lived here for five, six years." This indicates a more entrenched population that has experienced the market shifts firsthand.
The economic impact of this population boom is starkly illustrated by housing price data. Mountain West cities, including several in Idaho, led national trends in home price appreciation between 2019 and 2023, according to the Urban Land Institute’s Terwilliger Center Home Attainability Index. The Boise metropolitan area topped this list, with Coeur d’Alene, Idaho Falls, and Twin Falls also ranking within the top ten for percentage increases in home prices. This rapid escalation has placed homeownership and even rental housing beyond the reach of many long-time Idahoans and those with more modest incomes.
A Legislative Response to Mounting Affordability Pressures
In response to these growing concerns, state lawmakers established a committee last year tasked with scrutinizing state and local land-use regulations and their impact on housing supply. The committee’s findings and recommendations have directly informed the legislation now signed into law. The bills aim to streamline the development process and encourage a wider variety of housing types, thereby increasing supply and potentially moderating price growth.
However, the legislative process was not without contention. As is often the case with significant land-use reforms, local governments expressed considerable opposition, viewing the state’s intervention as an infringement on their autonomy. Officials in Coeur d’Alene, for instance, publicly criticized the bills during a recent city council meeting, with one official reportedly labeling the legislation as "dumb" and "not very clever," according to a local newspaper report. This sentiment highlights the ongoing tension between state-level mandates and local control over development and zoning decisions.
Key Provisions of the Housing Reform Package
The newly enacted legislation comprises several key components designed to address specific barriers to housing development and affordability. These provisions aim to create more housing options, from starter homes to multi-unit dwellings, and to make the development process more efficient.
Manufactured Housing Integration
A significant aspect of the reform package involves the treatment of manufactured homes. The new Idaho law now classifies manufactured homes, including multi-dwelling units, on par with site-built housing for siting purposes. This includes lowering minimum size requirements and explicitly prohibiting zoning regulations that would exclude single-section or smaller manufactured units. While manufactured single-unit homes must be permitted in areas zoned for single-family housing, manufactured duplexes will be restricted to multifamily zones. This provision is expected to broaden the availability of more affordable housing options by removing regulatory hurdles for factory-built homes.
Streamlining Lot Splits for Accessory Dwelling Units (ADUs)
The legislation introduces an administrative pathway for cities and counties to approve limited lot splits. This process is specifically designed to facilitate separate ownership or financing for existing or approved Accessory Dwelling Units (ADUs) or secondary housing units on a property. Importantly, these lot splits do not grant new dwelling entitlements or increase density beyond what existing zoning already permits. Each resulting lot must still adhere to local infrastructure, setback, and building requirements, ensuring that development remains orderly and sustainable. This measure aims to make it easier for homeowners to monetize underutilized portions of their property by creating separate legal parcels for ADUs.
Enabling Single-Stair Buildings
Revisions to the Idaho Building Code Act will now allow local governments to approve smaller apartment buildings that utilize a single interior exit stairway. This change is contingent upon adherence to stringent life-safety standards. Such buildings will be limited in height, the number of units, and floor area. Furthermore, they are required to incorporate robust safety features, including full sprinkler systems, pressurized two-hour-rated stairwells, fire-rated corridors, short exit travel distances, and comprehensive smoke and fire detection systems. This provision could potentially lower construction costs for small multi-family developments, thereby increasing the supply of rental units.
Expanding Accessory Dwelling Unit (ADU) Opportunities
Under the new zoning reforms, cities will be required to permit accessory dwelling units (ADUs) by right in many residential zones. This means that local governments and homeowners’ associations will no longer be able to outright ban ADUs. The law guarantees the allowance of at least one ADU per lot in covered jurisdictions. Local regulations that impose maximum size caps are now barred, though health, safety, and infrastructure standards will still apply. This initiative aims to increase housing stock within existing neighborhoods and provide homeowners with opportunities for additional income or multi-generational living arrangements.
Promoting Starter Homes and Smaller Lots
The state law now preempts certain local regulations that have historically hindered the development of "starter home subdivisions" on parcels of at least four acres. The legislation prevents cities from using excessively large minimum lot sizes or other dimensional standards to block these projects. Specifically, it bars local rules that mandate lot sizes exceeding a defined minimum, such as 1,400 square feet, or impose certain setback requirements, depths, and fees. Additionally, the law encourages cities to permit smaller lots and higher minimum densities, approximately 12 units per acre, for these starter home projects, provided that infrastructure capacity can support such development. This measure is intended to facilitate the construction of more entry-level homes, making homeownership more attainable for first-time buyers.
Broader Implications and Future Outlook
The passage of these housing reforms signals a significant shift in Idaho’s approach to land use and development. By centralizing some decision-making authority and establishing statewide standards, the legislature aims to create a more predictable and streamlined environment for housing construction. The focus on missing middle housing, ADUs, and manufactured homes suggests a strategic effort to diversify the housing stock and cater to a wider range of income levels and household needs.
The success of these reforms will ultimately depend on their implementation at the local level and their ability to foster a sustained increase in housing supply. While local governments have expressed reservations, the state’s legislative action indicates a commitment to addressing the affordability crisis through proactive policy changes. The long-term impact may include a stabilization of housing prices, increased housing options for residents, and a more equitable housing market. However, ongoing monitoring and potential adjustments will likely be necessary to ensure that the legislation achieves its intended goals without unintended negative consequences. The coming years will reveal whether this comprehensive legislative package can effectively alleviate the housing pressures that have gripped Idaho.
