As zoning reform gains traction across the country, Accessory Dwelling Units (ADUs) offer a unique strategy for single family planning. They help increase density, provide flexibility and deliver real value for homeowners and developers. Whether you’re revitalizing established neighborhoods or planning new communities, ADUs offer a smart, scalable approach to meet growing demand for housing.
Driven by the ever-increasing need for more housing, ADUs respond directly to changing demographics and economics. Affordability is driving this change. More families are choosing to live together, and many renters want smaller, more affordable units in walkable areas. Municipalities are adjusting codes to allow for infill growth that fits the character of existing neighborhoods. ADUs can check all those boxes.
With the right design, every lot can provide more. ADUs create opportunities for rental income, aging-in-place strategies, or flexible living arrangements that adapt over time.
Detached ADU
A detached ADU is a stand-alone unit built on the same lot as the main residence. It functions independently and privately to establish a sense of single family living. Often placed in the backyard or rear corner of the lot, this configuration creates a highly flexible space that can serve as rental units, guest houses or housing for extended family.
Why it works
Their smaller size makes them easy to integrate into tight and irregular lots. Detached ADUs live like full homes, which appeals to renters, aging parents or grown children who want autonomy. They also help to meet city density goals while preserving the scale and character of the community.
Attached ADU
Attached ADUs are constructed as part of the primary residence but are designed to function independently. They typically share a structural wall with the main home and include a private entrance, living space, kitchen and bathroom. These units may be designed within the footprint of the new builds but are also created in existing homes through additions or conversions of garages or unused rooms. They often do not include dedicated parking.
Why it works
For builders, attached ADUs can be designed as options that can be built efficiently and deployed easily. This approach keeps construction costs down by using shared systems and materials. It’s ideal for homebuyers who want the option of rental property or space for grown children or extended family. The design can be as subtle or as prominent as the project demands.
Multi-Gen ADU
The multi-gen ADU is designed as an integrated option within the footprint of the main home. These layouts offer full functionality with private sleeping, living and kitchen spaces, often with an independent (but not isolated) entrance and included parking. Though connected to the main residence, the multi-gen ADU is thoughtfully planned to provide independence and privacy.
Why it works
Multi-gen layouts offer a flexible solution for today’s changing households. Options allow full separation or partial integration depending on family choice, enabling aging parents or even caregivers to interact easily with the primary homeowners while maintaining their individuality and independence.
Smaller Footprint, Bigger Impact
ADUs are reshaping neighborhoods by by exploring new density solutions for single family lots. As communities push for affordable housing, walkability and sustainability, ADUs provide a direct answer. They support local housing goals, extend the lifespan of single-family properties and create long-term flexibility for homeowners.
Are you considering adding ADUs to your project line-up? Please reach out and I’ll connect you with the BSB team in your area.
