Tiny Homes: Cambridge vs Lowell
How do tiny homes rules compare between Cambridge, MA and Lowell, MA?
Cambridge and Lowell have similar restriction levels.
Cambridge, MA
Middlesex County
Tiny homes on foundations are allowed as ADUs in Cambridge under MGL c.40A s.3A. Tiny homes on wheels are treated as recreational vehicles and cannot be used as permanent dwellings under the MA State Building Code.
View full Cambridge rules →Lowell, MA
Middlesex County
Tiny homes on permanent foundations can qualify as ADUs in Lowell under the 2024 state ADU mandate up to 900 square feet. Tiny houses on wheels are generally not allowed as permanent dwellings because they are classified as RVs under state law.
View full Lowell rules →Key Facts Comparison
| Fact | Cambridge | Lowell |
|---|---|---|
| Tiny home on foundation | Allowed as ADU | - |
| Max ADU size | 900 sq ft | - |
| Tiny home on wheels | Not allowed as dwelling | - |
| Governing code | 780 CMR and c.40A s.3A | - |
| Park model units | Not permitted in Cambridge | - |
| On foundation | - | Allowed as ADU |
| Size cap | - | 900 sq ft for ADU |
| Code | - | 780 CMR Appendix AQ |
| On wheels | - | Treated as RV not home |
| Permit | - | Inspectional Services |
Highlighted rows indicate differences between cities.
Cambridge FAQ
Can I park a tiny house on wheels in my Cambridge driveway?
Not as a dwelling. THOWs are treated as RVs and cannot be used for long-term living under state code.
Can I build a 600 sq ft tiny home as an ADU?
Yes, with a foundation and full building permit it qualifies under the state ADU law.
Lowell FAQ
Can I live in a tiny home in Lowell?
Yes if it is on a permanent foundation and built to code, typically qualifying as an ADU up to 900 square feet.
Can I park my tiny house on wheels and live in it?
No. Massachusetts classifies tiny houses on wheels as RVs, which cannot be used as permanent residences in residential zones.
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