Madison's Fall 2025 Housing Forward proposals include a major update for homeowners and investors: the ability to build two ADUs (Accessory Dwelling Units) in a single detached structure. You can see the official summary from Madison here.
This is a big shift from the current rule, which only allows one ADU per property.
What This Change Means
More Space for Families – Instead of having to choose between housing parents or creating a guest suite, you could do both.
Flexibility for Life Changes – A second ADU gives you options. Use one as a long-term rental and keep the other for family, or reconfigure as your needs evolve.
Increased Property Value – More units = more housing = more long-term value.
Why It's Exciting for Investors
This proposal also makes ADUs a stronger investment strategy:
Double the Rental Potential – Two ADUs on one lot means more monthly income without having to purchase more land.
Lower Barrier to Entry – ADUs are still smaller and less expensive to build than full multi-family properties, making this an accessible way to scale.
Neighborhood-Friendly Growth – Two small units fit into existing neighborhoods more smoothly than a larger apartment building.
Whether you're looking to keep loved ones close or grow your property's earning potential, Madison's proposal to allow two ADUs is a major step forward.