As more homeowners consider building an accessory dwelling unit, misinformation can create hesitation or confusion. Whether it’s a garage conversion, detached cottage, or attached addition, each type of unit brings unique benefits — and often, unnecessary assumptions. By addressing common myths, it becomes easier to make informed decisions that align with your property, budget, and long-term goals.
Detached Units Are Always Too Expensive
One widespread belief is that detached ADUs are financially out of reach for most homeowners. While these standalone structures can have higher upfront costs due to new foundations and utility connections, they often offer greater return on investment. With added privacy and strong rental potential, they’re viewed as valuable assets, especially in high-demand neighborhoods. Costs also vary widely depending on size, materials, and local regulations — meaning they may be more accessible than expected with careful planning.
Garage Conversions Don’t Count as Real Living Spaces
Some assume that garage conversions lack the quality or comfort of other accessory dwelling unit types. In reality, a well-executed garage transformation can meet or exceed residential living standards. With proper insulation, lighting, plumbing, and ventilation, these spaces are entirely livable — and often ideal for studios, guest quarters, or income properties. Their biggest appeal lies in reusing existing space, which can cut costs without sacrificing functionality.
Attached ADUs Are Too Invasive to Daily Life
Another common myth is that an attached accessory dwelling unit will disrupt the household’s flow or create a lack of privacy. But with thoughtful design — including separate entrances, private bathrooms, and soundproofing — attached units can feel distinct while staying conveniently connected. For multigenerational families or caregivers, proximity can actually enhance quality of life without overcrowding or interfering with daily routines.
Zoning Makes It Impossible to Build an ADU
While it’s true that local codes and zoning requirements vary, many cities have actively updated their policies to support accessory dwelling unit development. In fact, recent legislation in places like California has made the process more streamlined, allowing more homeowners to build than ever before. Whether adding a backyard cottage or converting an attic, understanding local guidelines is key — and often, the obstacles are smaller than expected.
Accessory dwelling units offer flexible solutions for growing households, changing work needs, and evolving lifestyles. Myths often stem from outdated assumptions or isolated challenges, but the reality is that ADUs continue to prove their value across all property types. When approached with accurate information and a clear vision, they become more than just additions — they’re smart, sustainable choices for modern living.
Read more:
Designing Your ADU: Choosing the Right Type for Your Property