ADU Locator

1 Best ADU Builders in Derry, New Hampshire

Verified ADU contractors and builders in Derry, NH

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Bold Move Builders, LLC

From accessory dwelling units to decks and remodels, we bring honesty, craftsmanship, and clear communication to every project in Southern New Hampshire. At Bold Move Builders, we believe building your dream space should feel exciting, not stressful.

(603) 247-5542
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Frequently Asked Questions — ADU Builders in Derry

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

ADU construction costs in Derry, New Hampshire 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 Derry to get accurate quotes for your specific project.

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

In Derry, 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 New Hampshire local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

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

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

What types of ADUs can be built in Derry?

Common ADU types in Derry 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 Derry ADU builder can advise on what's allowed on your specific parcel.