Off-Grid Living in Wrentham, Massachusetts

I'll be upfront: I'm researching Wrentham's rules from official town and state sources, not living there off-grid myself, so treat this as a starting map, not legal advice. Always confirm specifics with the named office before you buy land or build.

Wrentham is a zoned town, governed by Chapter 390 of the Town Code (its Zoning Bylaw), with thirteen base districts (like R-30, R-43, R-87) plus overlays. That means raw land isn't a blank slate. Some uses are allowed as of right, others need a special permit from the Zoning Board of Appeals, and older nonconforming lots (pre-1956) may need ZBA relief on setbacks or frontage before you can build at all.

For dwellings, tiny homes, and RVs, I didn't find a dedicated town bylaw addressing RVs or tiny houses as permanent residences directly. What I did find is the general rule: the town's Building Inspector must issue a building permit and then an occupancy permit before any structure, of any type, can legally be lived in, and that permit certifies compliance with both zoning and the Massachusetts State Building Code. Whether an RV used as a permanent home would even qualify is not confirmed in what I found, so ask the Inspections Department directly.

Septic is a big deal here: there's no public sewer anywhere in Wrentham, so every home relies on a septic system, regulated by the town Board of Health under the state's Title 5 wastewater code, plus the town's own septic regulations. Composting toilets aren't separately addressed in town materials I found, so how they interact with Title 5 isn't confirmed, again a Board of Health question.

Greywater reuse has no standalone town bylaw that I could find; it appears to fall under the same Title 5 soil-based treatment framework as septic. Rainwater harvesting is similarly quiet at the town level; outdoor non-potable collection is generally fine under the state baseline, but indoor or potable use isn't addressed locally, so that's unclear.

Private wells are locally regulated: the Board of Health maintains its own Well Regulations alongside its septic rules, consistent with the statewide setup where Boards of Health oversee private well siting, construction, and testing.

Living fully off the grid (no utility hookups) doesn't appear explicitly banned, but it isn't explicitly exempted either. The same building/occupancy permit process applies regardless of whether you're grid-tied, so in practice your off-grid systems (septic, well, power) all get checked through that same inspection gate.

One bright spot: under the state's Affordable Homes Act, accessory dwelling units up to a set size are now allowed by right in single-family zones statewide, which overrides some of Wrentham's older ADU restrictions, useful if you're thinking about a small secondary unit.

Also worth flagging: clearing land, grading, or cutting trees before you have your permits in hand is prohibited under the zoning bylaw. Don't prep the site before you've got paperwork.