ADU Pulse

Harwich

Barnstable County · Pop. 13,440

A

Harwich has approved 15 of 15 ADU applications (100% approval rate).

How active is your town?
11.2
per 10K residents5.6x state average
Harwich
11.2
State avg
2.0

Based on 15 approved ADU applications and 13,440 residents

Permits

100%approval rateⓘShare of 2025 applications approved in 2025
15 approved0 denied0 pending

15 applications since the ADU law took effect in Feb 2025

Bylaw Consistency

We haven't reviewed Harwich's bylaws yet. See the 28 towns we've analyzed for consistency with Chapter 150.

Cost Snapshot

No cost data available yet for Harwich.

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ADU Impact on Housing Production

In 2024, Harwich issued 33 total residential building permits. In the first year of the ADU law, 15 ADU permits were approved — equivalent to 45.5% of prior-year housing production.

2024 Building Permits
33
2025 ADU Approvals
15

Source: Census Bureau (2024) via UMass Donahue Institute; EOHLC ADU Survey (2025)

How Harwich Compares

B
Barnstable19% rate · 1.2 per 10K
6A
Falmouth100% rate · 3.7 per 10K
12A
Yarmouth200% rate · 6.4 per 10K
16A
Dennis86% rate · 4.1 per 10K
6
Compare more towns

Next Steps

Join Harwich's ADU Club for group builder ratesFind builders working in Barnstable CountyRead the ADU homeowner guide

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.