ADU Locator

1 Best ADU Builders in Highland, Maryland

Verified ADU contractors and builders in Highland, MD

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Winthorpe Design & Build

At Winthorpe Design & Build, we believe that every inch of your property holds a world of potential. With our commitment to innovative design and superior craftsmanship, we can help you unlock that potential with our custom-built Accessory Dwelling Units (ADUs).

(301) 854-2092
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Frequently Asked Questions — ADU Builders in Highland

How much does it cost to hire an ADU builder in Highland?

ADU construction costs in Highland, Maryland vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Highland to get accurate quotes for your specific project.

How long does it take to build an ADU in Highland?

In Highland, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Maryland local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

Do I need a permit to build an ADU in Highland?

Yes, a building permit is required for ADU construction in Highland, Maryland. Your ADU builder will typically handle the permit application as part of their service. Maryland has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.

What types of ADUs can be built in Highland?

Common ADU types in Highland include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Highland ADU builder can advise on what's allowed on your specific parcel.