ADU Locator

1 Best ADU Builders in Hyannis, Massachusetts

Verified ADU contractors and builders in Hyannis, MA

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GS Garcia Custom Build

Transform your underutilized garage into functional living space with expert conversion services throughout the Cape Cod area. We specialize in garage-to-living-space renovations that maximize your home's potential while maintaining quality craftsmanship and attention to detail.

+1 774-810-9235
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Frequently Asked Questions — ADU Builders in Hyannis

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

ADU construction costs in Hyannis, Massachusetts 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 Hyannis to get accurate quotes for your specific project.

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

In Hyannis, 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 Massachusetts local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

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

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

What types of ADUs can be built in Hyannis?

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