Maui Property Owners May Gain Right to Build Two Accessory Dwelling Units Per Lot
Maui County is considering a policy shift that could significantly alter residential property development and rental markets. Bill 78, CD1, if approved, would permit homeowners on any residentially zoned lot to construct up to two Accessory Dwelling Units (ADUs). This change aims to increase housing availability and provide new income streams for property owners.
The Change
The proposed legislation, currently under review by the Maui County Council, seeks to liberalize existing ADU regulations. As it stands, restrictions may limit the number or placement of ADUs. If passed, Bill 78, CD1, would enable property owners to develop up to two ADUs on their existing residential lots, regardless of lot size or zoning classification within residential areas. The Grassroot Institute of Hawaii has been advocating for such changes, proposing that this expansion could help alleviate housing shortages and offer economic benefits to property owners. The council is expected to deliberate on this bill within the coming months, with a decision likely impacting future property development strategies on Maui.
Who's Affected
Real Estate Owners
Property owners, landlords, and small-scale developers stand to benefit most directly if Bill 78, CD1, is enacted. The ability to construct two ADUs per lot could substantially increase rental inventory and generate significant additional income from existing properties. This offers a pathway to diversifying revenue streams and maximizing the utility of residential land. Developers might find new opportunities in creating multi-unit properties on single lots, subject to permitting and construction timelines.
Small Business Operators
While not directly involved in property development, small business operators, particularly those in service industries, restaurants, and retail, could see indirect benefits. An increase in available rental housing could potentially ease some pressure on local wages by stabilizing the cost of living, although this effect might be marginal. More housing units could also lead to a slightly larger customer base and workforce accessibility, benefiting businesses that rely on local patronage and employee availability.
Second-Order Effects
Housing Market Dynamics
Allowing two ADUs per lot could lead to a modest increase in the overall housing stock. This added inventory, primarily in the rental market, may exert downward pressure on rental prices over time, benefiting renters and potentially easing cost-of-living concerns for some residents. However, the actual impact on affordability will depend on construction costs, permitting efficiency, and the rate at which new ADUs are built.
Local Economy Stimulation
The construction of new ADUs will likely stimulate local economic activity. This includes demand for building materials, labor, and related services, providing work for contractors, tradespeople, and suppliers. Increased rental income for property owners could also lead to greater local spending, further boosting the economy.
What to Do
Real Estate Owners & Developers
Monitor: Keep a close watch on the Maui County Council's deliberations regarding Bill 78, CD1. Understand the final stipulations, permitting requirements, and potential timelines. If the bill passes, begin preliminary planning for ADU development, including site assessments and consultation with architects and permitting consultants. Investigate financing options and understand the potential return on investment based on current rental market rates.
Small Business Operators
Monitor: While direct action is not required, note the potential for shifts in the local rental market and cost of living. This information can inform long-term staffing and operational cost projections. Be aware that increased construction activity could temporarily affect local traffic and noise levels in certain neighborhoods.



