Waltham
Middlesex County · Pop. 65,218
Waltham has approved 4 of 5 ADU applications (80% approval rate).
Based on 4 approved ADU applications and 65,218 residents
Permits
5 applications since the ADU law took effect in Feb 2025
Bylaw Consistency
We haven't reviewed Waltham's bylaws yet. See the 28 towns we've analyzed for consistency with Chapter 150.
Cost Snapshot
No cost data available yet for Waltham.
Try the cost estimatorADU Impact on Housing Production
In 2024, Waltham issued 32 total residential building permits. In the first year of the ADU law, 4 ADU permits were approved — equivalent to 12.5% of prior-year housing production.
Source: Census Bureau (2024) via UMass Donahue Institute; EOHLC ADU Survey (2025)
How Waltham 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.