As more homeowners explore ways to expand their living space or generate rental income, choosing the right type of accessory dwelling unit becomes an important step in the planning process. Whether you’re creating space for family, downsizing within your property, or preparing for future flexibility, understanding the benefits and trade-offs of each option will help guide the decision. Detached, attached, and garage conversion units each offer unique value depending on your goals, property size, and local regulations.
Detached Units: Independence with a Higher Investment
A detached accessory dwelling unit is a fully separate structure, often located in the backyard. This option provides the greatest level of privacy for both the main house and the new living space, making it ideal for long-term tenants or multigenerational families seeking some distance. The design flexibility is a major advantage, allowing for customized layouts and features. However, detached builds are generally the most expensive due to construction costs and the need for new utility connections. You’ll also need sufficient lot size and setback clearance to meet zoning requirements.
Attached Additions: Connection with Cost Efficiency
An attached unit is built as an extension of the existing home, sharing one or more walls. These accessory dwelling units are well-suited for families needing close proximity, such as aging parents or adult children. Because they often tap into existing systems for water, gas, and electricity, they tend to be more cost-effective than detached alternatives. While they can offer private entrances and separate amenities, privacy may still be more limited, depending on the design and layout.
Garage Conversions: Utilizing What You Already Own
Converting a garage into an accessory dwelling unit is one of the most popular options for budget-conscious homeowners. This strategy makes use of an existing structure, cutting down on time and costs. It’s ideal for smaller households or those seeking passive rental income without sacrificing major yard space. Garage conversions may have space constraints, and insulation or structural upgrades are often needed to meet code. Still, for many, it’s a smart and accessible path to adding livable square footage.
Balancing Lifestyle, Budget, and Future Use
The right choice ultimately depends on how the space will be used and how much flexibility you want long term. Detached units suit those prioritizing privacy and future resale value. Attached additions are practical for shared living, while garage conversions offer efficiency for homeowners with limited expansion room. Think beyond current needs—whether that’s hosting family, working from home, or earning income—and choose the accessory dwelling unit type that aligns with your property and personal vision. Each has its own strengths, and the best solution is one that grows with you.
Read more:
Designing Your ADU: Choosing the Right Type for Your Property
Pros and Cons of Each ADU Type: Making the Right Choice