Nantucket
Nantucket County · Pop. 14,255
Nantucket has approved 27 of 27 ADU applications (100% approval rate) and has 2 of 7 bylaw provisions consistent with state law.
Based on 27 approved ADU applications and 14,255 residents
Permits
27 applications since the ADU law took effect in Feb 2025
Bylaw Consistency
Nantucket’s HDC review adds a layer of design scrutiny that doesn’t exist on the mainland. The 4 inconsistent provisions are preempted by state law, but the island’s unique regulatory culture means pushback is common. Budget extra time for approvals.
Provision-by-provision analysis available
We've mapped 7 provisions in Nantucket against Chapter 150. See which specific bylaw sections appear inconsistent with state law.
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No cost data available yet for Nantucket.
Try the cost estimatorADU Impact on Housing Production
In 2024, Nantucket issued 262 total residential building permits. In the first year of the ADU law, 27 ADU permits were approved — equivalent to 10.3% of prior-year housing production.
Source: Census Bureau (2024) via UMass Donahue Institute; EOHLC ADU Survey (2025)
Next Steps
Sources: EOHLC ADU Survey 2025. Population estimates from 2024 Census ACS.
Disclaimer: ADU Pulse provides data for informational purposes only. It does not constitute legal, financial, or construction advice.Bylaw consistency analysis reflects our interpretation of public records and may not reflect the most current local amendments.
See methodology for details on data collection, scoring, and consistency analysis.