Off-Grid Laws › Maine › Knox County

Off-Grid Living in Union, Maine

Union, Maine is a zoned town with its own Land Use Ordinance and a state-mandated Shoreland Zoning overlay near water, both administered by the Code Enforcement Officer. Off-grid elements like composting toilets, greywater, and rainwater collection appear workable under state and local rules, but several specifics (tiny homes/RVs, MUBEC adoption, rainwater permitting) aren't confirmed and need a direct check with the CEO.</summary> <parameter name="framework">{"zoning":{"status":"restricted","note":"Union maintains its own Land Use Ordinance covering the whole town, administered by the Code Enforcement Officer, plus a state-mandated Shoreland Zoning overlay within 250 feet of great ponds/rivers and 75 feet of certain streams.","cite":"https://www.union.maine.gov/vertical/sites/%7B45C83186-1E71-4F7C-A6A6-4C9EBBC99C05%7D/uploads/Land_Use_Ordinance_-_Amended_June_11_2024.pdf"},"dwelling":{"status":"unclear","note":"No Union-specific text on tiny homes or RVs as permanent dwellings was found; this would fall under the Land Use Ordinance's dwelling and definitions sections, not confirmed without direct review with the CEO.","cite":""},"building":{"status":"restricted","note":"Union requires a building/land use permit through the Code Enforcement Officer and has its own local building code chapter; since Union's population is under 4,000, the state does not require MUBEC enforcement there, so current code status should be confirmed with the CEO.","cite":"https://www.union.maine.gov/code"},"septic":{"status":"permitted","note":"Maine DHHS/CDC state rules allow composting toilets and primitive greywater-only systems with no septic tank for limited flows, administered locally by Union's Local Plumbing Inspector (the CEO).","cite":"https://regulations.justia.com/states/maine/10/144/chapter-241/section-144-241-5/"},"greywater":{"status":"permitted","note":"State rules allow greywater disposal systems if a licensed site evaluator completes an application and a permit is issued, with no shared components with a main septic system; administered locally via the LPI/CEO.","cite":"https://regulations.justia.com/states/maine/10/144/chapter-241/section-144-241-5/"},"rainwater":{"status":"unclear","note":"No Union-specific or Maine-specific restriction on rainwater harvesting was found; general plumbing code may apply if tied into fixtures, but this is not confirmed, so ask the CEO.","cite":""},"well":{"status":"permitted","note":"No Union-specific well ordinance was found; well construction and siting are governed by Maine's state Water Well Commission rules, with local involvement mainly through septic/lot-size review by the LPI.","cite":"https://regulations.justia.com/states/maine/10/144/chapter-243/section-144-243-1000-0"},"utility":{"status":"unclear","note":"No explicit Union ordinance bans off-grid or utility-disconnected living; compliance flows through the existing building/land use permit and wastewater permit process, not confirmed as a standalone rule, so confirm occupancy expectations with the CEO.","cite":"https://www.union.maine.gov/vertical/sites/%7B45C83186-1E71-4F7C-A6A6-4C9EBBC99C05%7D/uploads/Land_Use_Ordinance_-_Amended_June_11_2024.pdf"}}

Is it legal to live off-grid in Union, Maine?

There is no outright ban on living off-grid in Union, Maine - it is legal but regulated. Zoning and land use are restricted, putting a cabin, tiny home, or RV on raw land is not clearly documented online, so confirm it locally, and building permits are restricted. Plan around septic/wastewater (generally allowed) and disconnecting from utilities (not clearly documented online, so confirm it locally). Because these rules are set locally, confirm the specifics with Union before you buy land or build.

Read this before you act on anything below. This is my researched starting point for Union, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
Primary-source verified ยท reviewed Aug 202619 government, statute, or municipal sources are linked below; the verdict card cites them where a match exists.

The verdict for Union

  • Zoning: Restricted
  • Dwellings, tiny homes: Unclear - verify
  • Building permits: Restricted
  • Septic: Generally allowed
  • Greywater reuse: Generally allowed
  • Rainwater harvesting: Unclear - verify
  • Private wells: Unclear - verify
  • Living disconnected from utilities: Unclear - verify

Union at a glance

Zoning & raw-land occupancy
RestrictedUnion is a zoned town with its own Land Use Ordinance covering the whole town, administered by the Code Enforcement Officer, plus a state-mandated Shoreland Zoning overlay within 250 feet of great ponds/rivers and 75 feet of certain streams. Any land use or building plan should start with a call to the CEO's office. source
Dwellings, tiny homes & RVs
Unclear - verifyI couldn't find Union-specific language on tiny homes or RVs as permanent dwellings. This falls under the Land Use Ordinance's dwelling and definitions sections, so you'd want to review that directly with the Code Enforcement Officer, Chris Packard.
Building permits & codes
RestrictedUnion requires a building/land use permit through the Code Enforcement Officer, and the town has its own local building code chapter. Maine only mandates the statewide Uniform Building and Energy Code (MUBEC) for towns over 4,000 residents; since Union is smaller, you should confirm current MUBEC adoption status directly with the CEO's office. source
Septic & composting toilets
Generally allowedComposting toilets and primitive grey-water-only systems are allowed under Maine's state subsurface wastewater rules, administered locally in Union by the Local Plumbing Inspector, which is the CEO. A primitive system covers hand-carried or hand-pumped water to up to three grey wastewater fixtures without a septic tank. source
Greywater reuse
Generally allowedGreywater disposal systems are allowed under state rule but require an application completed by a licensed site evaluator and a permit to install, and the system can't share components with a main septic system. This is administered locally through Union's Local Plumbing Inspector/CEO. source
Rainwater harvesting
Unclear - verifyNo Union-specific or Maine state rule restricting or requiring a permit for rainwater harvesting turned up in official sources. If you're tying a system into household plumbing fixtures, check with the Code Enforcement Officer about general plumbing code standards.
Private wells & water rights
Unclear - verifyNo Union-specific well ordinance exists; well construction and siting fall under Maine's state Water Well Commission rules, with local involvement mainly through the Local Plumbing Inspector when a lot's size interacts with septic system requirements. source
Living disconnected from utilities
Unclear - verifyI found no explicit Union ordinance banning off-grid or utility-disconnected living. In practice, whether you can live disconnected comes down to whether your structure triggers a building/land use permit and whether your wastewater plan satisfies the Local Plumbing Inspector, so confirm dwelling occupancy expectations directly with the CEO.

Who to call in Union

Offices named on official pages during research. Phone numbers appear only when the official page showed one; confirm hours and jurisdiction before you drive out.

Union, Maine is a genuinely zoned town, which sometimes surprises people who assume rural Maine is a free-for-all. I've dug through what's publicly available, and here's my honest read.

Zoning: Union has its own Land Use Ordinance (amended June 2024), administered by the town's Code Enforcement Officer, currently Chris Packard. On top of that, the state's Mandatory Shoreland Zoning Act kicks in near water, covering land within 250 feet of great ponds and rivers and 75 feet of certain streams. So depending on where your parcel sits, you could be dealing with the town's general land use rules, the state-driven shoreland overlay, or both. This isn't a place to just buy raw land and build without checking in with the CEO first.

Dwellings, tiny homes, RVs: I couldn't find Union-specific language addressing tiny homes or RVs as permanent residences. That likely lives somewhere in the Land Use Ordinance's dwelling and definitions sections, but I'd call it unconfirmed until you review that directly with the CEO's office.

Building permits: Union requires a building/land use permit through the CEO, and the town has its own local building code chapter. Here's the state-level wrinkle: Maine only requires towns with populations above 4,000 to enforce the Uniform Building and Energy Code (MUBEC). Union is smaller than that, and towns below the threshold aren't required to enforce MUBEC but also can't adopt a different code. Practically, that means you need to ask the CEO directly what code, if any, is currently being enforced.

Septic and composting toilets: Maine's Department of Health and Human Services sets the statewide subsurface wastewater rules, and Union's Local Plumbing Inspector (the CEO, in this case) administers them locally. Composting toilets are allowed, and the state even has a "primitive system" option for minimal greywater flows without a septic tank, capped at a modest daily flow limit. Any greywater system still needs a licensed site evaluator's application and a permit.

Rainwater harvesting: I found no Union or Maine-specific restriction on collecting rainwater. If you're plumbing it into fixtures, general plumbing code likely applies, but confirm with the CEO since I couldn't verify a specific rule either way.

Wells: No Union-specific well ordinance turned up. Well construction falls under Maine's Water Well Commission rules statewide, with local involvement mainly through septic and lot-size interactions handled by the LPI.

Off-grid utility disconnection: There's no ordinance I found that explicitly bans living off-grid in Union. Compliance really flows from whether your structure needs a building permit and whether your wastewater plan satisfies the LPI. I'd treat this as "permitted in practice, but every project still runs through the same permit gates."

Bottom line: Union isn't hostile to off-grid living, but it is a zoned, permit-driven town, and the state fills in gaps around septic and shoreland rules. Call the CEO before you commit to a plan.

Union in numbers

Worst-month sun
3.0 peak hours/day (4.6 annual average)
Heating degree days
7,581
Precipitation / snow
53.47 in / 57.9 in a year
Frost-free season
05-01 to 10-13
Elevation
89 ft

Open the full site report for this spot →

30-year climate normals for the nearest ZIP and distances from the town center; a specific parcel will differ. Run the site report on an address for its own numbers.

Sources

Primary sources (statutes, agencies, municipal documents)

Secondary sources (universities, regional bodies)

Only government, statute, municipal, university, and regional-planning sources are listed. Pages used to find an issue but not to substantiate it are not cited. See how this database is researched.

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FAQ

Common questions about off-grid living in Union

Is it legal to live off-grid in Union, Maine?

There is no outright ban on living off-grid in Union, Maine - it is legal but regulated. Zoning and land use are restricted, putting a cabin, tiny home, or RV on raw land is not clearly documented online, so confirm it locally, and building permits are restricted. Plan around septic/wastewater (generally allowed) and disconnecting from utilities (not clearly documented online, so confirm it locally). Because these rules are set locally, confirm the specifics with Union before you buy land or build.

Is Union, Maine zoned?

Yes. Union has its own town-wide Land Use Ordinance administered by the Code Enforcement Officer, plus a state-required Shoreland Zoning overlay near water bodies.

Can I use a composting toilet in Union?

Yes, composting toilets and limited primitive greywater systems are allowed under Maine DHHS/CDC state rules, administered locally by Union's plumbing inspector, currently the CEO.

Does Union require a building permit for an off-grid cabin?

Likely yes. Union requires building and land use permits through the CEO, though whether the state's MUBEC energy code applies is unconfirmed for a town this size, so ask the CEO directly.

Are there rules against living without hookups to town utilities?

No explicit ordinance bans it, but any structure still needs to clear the standard building/land use and septic permitting process.

Keep exploring

Off-grid rules in nearby Knox County towns

In Maine, every town sets its own rules - here are the neighbors.