Barnstable
Barnstable County · Pop. 48,916
Barnstable has approved 6 of 31 ADU applications (19% approval rate) and has 7 of 13 bylaw provisions consistent with state law.
Based on 6 approved ADU applications and 48,916 residents
Permits
31 applications since the ADU law took effect in Feb 2025
Bylaw Consistency
Barnstable amended its ADU ordinance in May 2025 to address owner-occupancy and parking requirements inconsistent with Chapter 150. However, three provisions appear to remain inconsistent with state law: a two-person occupancy cap, a 12-month rental minimum, and a restriction barring rental of both the principal dwelling and ADU simultaneously.
Provision-by-provision analysis available
We've mapped 13 provisions in Barnstable against Chapter 150. See which specific bylaw sections appear inconsistent with state law.
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Try the cost estimatorADU Impact on Housing Production
In 2024, Barnstable issued 193 total residential building permits. In the first year of the ADU law, 6 ADU permits were approved — equivalent to 3.1% of prior-year housing production.
Source: Census Bureau (2024) via UMass Donahue Institute; EOHLC ADU Survey (2025)
How Barnstable Compares
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.