ADUs as a High-Density Solution for Single-Family Neighborhoods

Whether they're detached or integrated into a multi-generational home, ADUs can offer flexible, affordable living arrangements for various types of households

July 16, 2025

Offering flexible and affordable living accommodations, ADUs can be integrated in a number of ways.

As zoning laws evolve, accessory dwelling units (ADUs) are being used more frequently as a practical solution for increasing the housing supply in single-family neighborhoods. While boosting density, ADUs also offer flexible living accommodations, can create value for both homeowners and developers, and are proving effective in revitalizing older neighborhoods and shaping new ones.

And as the housing affordability crisis forces multiple generations of families to live under one roof together and wannabe buyers to seek smaller, budget-friendly homes, more mulicipalities are updating their zoning rules to allow ADUs.

In a recent blog post, Greenwood Village, Colo.-based architecture firm BSB Design outlined how various types of ADUs can complement single-family communities:

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.