Off-Grid Living in Rutherford County, Tennessee

I've been digging into what off-grid living actually looks like in Rutherford County, Tennessee, and the first thing I want to flag is something a lot of people miss: this county actually has countywide zoning. That's not the norm for rural Tennessee, so if you're moving here expecting the "wild west, no zoning" reputation some counties have, adjust your expectations. That said, all of what follows applies to unincorporated Rutherford County. If you're inside Murfreesboro, Smyrna, LaVergne, or Eagleville city limits, those cities run their own separate codes and this brief doesn't cover them.

Zoning. The Rutherford County Zoning Ordinance, administered by the Rutherford County Regional Planning Commission, governs unincorporated land. There's good news for larger parcels: agricultural use on 5+ acres is a use by right, and structures used exclusively for agriculture on those parcels are exempt from building permits. The county is also mid-update on its comprehensive plan (PlanRutherford), which could shift rural zoning treatment down the road, so keep an eye on that if you're planning long-term.

Dwellings, tiny homes, RVs. This is genuinely murky. The county's Building Codes Department enforces the International Residential Code and requires a Zoning Compliance Certificate plus a building permit for residential dwellings, but I couldn't find an official county page that spells out how tiny houses on wheels or long-term RV living are classified. Don't guess here, call Building Codes directly before you commit to a plan.

Building permits. Required for unincorporated county land, no opt-out. You'll need a Zoning Compliance Certificate from Planning & Engineering and proof of an approved septic or sewer connection before a permit is issued. Small stuff (storage sheds under 120 sq ft without a foundation, fences under 7 feet, patios, driveways) is exempt, but an actual dwelling is not.

Septic. Here's a quirk: Rutherford County doesn't run its own environmental health septic office. Septic permitting flows through the Tennessee Department of Environment and Conservation (TDEC), state level, not county. No local composting-toilet exemption was found, so the state's NSF 41 standard is what governs.

Greywater and rainwater. No county ordinance either way. Greywater falls back to whatever the state plumbing code says, and rainwater collection appears unrestricted, though tying into home plumbing would likely need a plumbing permit.

Wells. Drilling is handled by state-licensed well drillers under TDEC water well law, not the county. The Consolidated Utility District of Rutherford County (CUD) also offers STEP wastewater systems as an alternative path to septic when you're applying for a building permit.

Disconnecting from utilities. Going off the electric grid isn't restricted by the county. But you can't fully skip wastewater management: any new dwelling permit requires proof of either a TDEC septic (SSDS) permit or a CUD STEP system first.

Bottom line: Rutherford County is more regulated than many rural TN counties, and several key questions (tiny homes, greywater specifics) just aren't spelled out publicly, so a phone call before you buy land will save you real headaches.