Homes with in-law suites and accessory dwelling units (ADUs) in Maryland are in high demand—and for good reason. Across the counties surrounding Washington, DC, buyers are prioritizing flexibility: space for aging parents, returning adult children, live-in childcare, rental income, or simply a home that can evolve as life changes.

In this market, adaptability is value.

What’s the Difference Between an In-Law Suite and an ADU?

An in-law suite is typically a private living space within or attached to the main home. It may include:

• A bedroom

• Full bathroom

• Living area

• Kitchenette

• Sometimes a private entrance

An Accessory Dwelling Unit (ADU), on the other hand, is a legally defined secondary dwelling on the same property. It may be:

• A fully finished basement apartment

• An attached addition

• A garage conversion

• A detached backyard cottage

ADUs are governed by specific county zoning laws and permitting requirements, which vary across Maryland.

Where to Find Homes with In-Law Suites & ADUs in Maryland

You’re most likely to find them in:

• Hyattsville, University Park, and Mount Rainier

• Silver Spring and Takoma Park

• Bethesda and Chevy Chase

• Established neighborhoods with larger lots or finished lower levels

Many older Victorian, Colonial, and mid-century homes have been thoughtfully expanded to include lower-level apartments or detached backyard cottages.

What to Watch For: Zoning & Permits Matter

Not every secondary suite qualifies as a legal ADU. Before purchasing, it’s important to confirm:

• County zoning compliance

• Proper permits and inspections

• Egress and ceiling height requirements

• Separate utilities, if applicable

Each Maryland county has its own ADU regulations, and understanding them upfront protects both your investment and your flexibility.

Is This the Right Fit for You?

Whether you’re looking for a home with an existing in-law suite, a legally permitted ADU, or exploring the possibility of adding one, the strategy matters.

If you’re searching for homes with in-law suites or ADUs in Maryland, I’d be happy to help you evaluate what makes sense for your goals—today and ten years from now.

Browse available listings below or reach out for a personalized strategy conversation.