Off-Grid Living in Marlborough, New Hampshire

I've been digging through Marlborough, New Hampshire's zoning ordinance and town website to figure out what's realistic for anyone hoping to live off-grid here, and the short version is: this is a zoned town, so "off-grid" doesn't mean "unregulated." Here's what I found, and where the gaps are.

Zoning. Marlborough is divided into Residential districts (R1 Village Residential through R4 Scenic Rural), Commercial districts (C1-C4), and a Flood Plain District, all laid out in the town's 2022 zoning ordinance with a Table of Use Regulation controlling what's allowed where. What you can do with raw land depends entirely on which district it's in, so a call to the Planning Board before you buy or build is the smart move.

Dwellings, tiny homes, RVs. I couldn't find a Marlborough-specific ordinance addressing tiny houses or RVs as dwellings. What I do know is that New Hampshire state law requires any municipality with zoning to allow accessory dwelling units by right in districts that permit single-family homes, without piling on extra lot size or design requirements, and towns can't demand more from an ADU septic-wise than the state (NH DES) requires. How Marlborough has folded that into its own code isn't confirmed from what I could find, so ask the Zoning Administrator directly.

Building permits. New Hampshire has adopted statewide building and fire codes (based on national model codes), and Marlborough enforces them locally through its own Building, Plumbing, and Electrical Inspectors. It's on the property owner to schedule inspections, and the town says calls to inspectors get returned within 48 hours.

Septic and composting toilets. This is where zoning and wastewater rules intersect: Marlborough's minimum lot sizes assume you're on town sewer. If you're not, the ordinance says the lot can only be smaller than the standard minimum if a New Hampshire-licensed septic engineer designs a system that gets state approval, and even then there's a floor you can't go below. I found nothing town-specific on composting toilets, so the state DES rules (its subsurface wastewater program) would be the baseline to check.

Greywater and rainwater. Neither turned up in Marlborough's ordinance or any town health regulation I could locate. New Hampshire doesn't appear to have one clean statewide greywater rule either, so in practice this likely gets handled case-by-case through the septic design and permitting process. Rainwater harvesting looks like it falls under the state-adopted plumbing and residential codes as enforced by the town's Building Inspector, but there's no dedicated local rule I could confirm.

Wells. No Marlborough-specific well ordinance surfaced. Well construction is governed statewide by the NH Water Well Board, so that's a state licensing matter, not a town one.

Off-grid / utility disconnection. The ordinance does tie multi-family development (up to four units) to town sewer availability, which tells me the town isn't indifferent to utility hookups. But I didn't find language expressly banning a single-family home on a conforming lot from going off-grid. Still, confirm your specific parcel with the Planning Board and Building Inspector before committing.

Bottom line: Marlborough gives you real avenues for off-grid living, especially around septic and wells where state rules dominate, but several pieces (tiny homes, greywater, rainwater) simply aren't spelled out locally yet. That's a call-first situation, not a guess-and-build one.