Accessory dwelling unit — Baltimore, MD

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

An ADU is a flexible, independent living area on your property. You might need one if you are running out of space, need a home office, or want to house family members close by. We guide you through the entire project from start to finish. Exact pricing confirmed free on the call.

Frequently asked in Baltimore

Also serving nearby: Washington · Alexandria · Reading · Philadelphia · Allentown

All cities in Maryland →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

Serving all of Baltimore — population 565,239; about 6,982 residents per square mile across 80.9 sq mi. ZIP codes covered include 21201, 21202, 21203, 21205, 21206, 21209, 21210, 21211.

Neighborhoods served in Baltimore: Federal Hill, Canton, Fells Point, Hampden, Mount Vernon, Inner Harbor — and every surrounding area.