What is Back40 Land Services?

Professional land clearing, forestry mulching, brush removal, and site prep across Middle Tennessee. Veteran-owned & operated. Call (615) 609-0053 for a free quote!

Is Back 40 Land Services currently available for septic installation in Williamson County?

Not yet for the full installation. Williamson County has local licensing requirements for septic installers that go beyond Tennessee's statewide TDEC license. Back 40 holds the state license and is actively working through the Williamson County process. Until that county-level licensing is complete, we are not accepting septic installation contracts in Williamson County. We are happy to answer questions and help you understand what your project will require so you're ready to move quickly once we are licensed.

What types of septic systems are common in Williamson County?

Williamson County has a wide range of soil and terrain conditions. Properties in the Central Basin portion of the county — generally the eastern and central townships — often have Maury silt loam soils that support conventional gravity septic systems. Properties in the Highland Rim areas, particularly around Fairview and along ridge lines in the western townships, frequently encounter shallow limestone bedrock and clay-heavy soils that require Low Pressure Pipe (LPP) systems. Your TDEC-licensed soil evaluator will determine which system your specific site qualifies for.

What is a conventional septic system?

A conventional gravity septic system consists of a buried septic tank and a drain field. Wastewater flows from the home into the tank, where solids settle and bacteria break down organic matter. The clarified liquid then flows by gravity through perforated pipes into the drain field, where it filters through the soil. No pump or electricity is required. Conventional systems are generally lower cost and lower maintenance than LPP systems, but they require suitable soil drainage.

What is an LPP septic system and when is it required?

A Low Pressure Pipe (LPP) system uses a pump to distribute effluent in timed doses through small-diameter pipes across a shallow drain field. TDEC requires LPP systems on sites where conventional gravity drainage won't work — typically properties with clay-heavy soils, shallow depth to bedrock, or elevated seasonal water tables. These conditions are common across a significant share of rural Williamson County lots. An LPP system costs more upfront but makes otherwise unbuildable lots viable.

How do I get a septic permit in Williamson County?

Septic permits in Williamson County are issued through the Williamson County Environmental Health office in Franklin. The process starts with a soil morphology study and perc test by a TDEC-licensed evaluator, followed by a permit application with the evaluator's report, a site plan, and (for LPP systems) a licensed engineer's stamped design. The county reviews the package and, once approved, issues a permit authorizing installation. A final inspection is required before the system can be backfilled.

How can I prepare for a septic project now while waiting for Back 40 to become licensed in Williamson County?

The most productive step is to schedule a soil evaluation with a TDEC-licensed soil evaluator. This determines what system type your property will require and begins the permitting clock. You can also research setback requirements for your lot, identify where utilities are located, and understand how the drain field location might affect your house placement or site plan. All of this preparation means you'll be ready to move immediately once the county licensing process is complete.

B40

BACK 40 LAND SERVICES LLC

(615) 609-0053

Rural land and open acreage in Williamson County Tennessee

Septic Services · Williamson County, TN

Septic Installation Coming to
Williamson County, TN

Back 40 Land Services is completing Williamson County's local licensing requirements and preparing to offer conventional and LPP septic installation across the county.

Williamson County Septic Installation — Licensing In Progress

Back 40 Land Services holds Tennessee's statewide TDEC septic installer license. Williamson County requires an additional local license for septic installers. We are actively completing that county-specific process. We are not currently accepting septic installation contracts in Williamson County. We are happy to answer questions and help you prepare your project in the meantime.

Back 40 Land Services is preparing to expand its septic installation services into Williamson County. Williamson County has additional local licensing requirements for septic installers that go beyond Tennessee's statewide TDEC license — requirements that Back 40 is currently working through before offering septic installation services in the county.

In the meantime, this page provides useful information about septic systems in Williamson County — soil conditions, system types, the permitting process, and what you can do right now to prepare your property and project before installation begins.

For active septic installation in Middle Tennessee, Back 40 currently serves Maury County and Rutherford County, with Williamson County coming soon.

About Williamson County's Licensing Requirements

Tennessee issues a statewide TDEC license for septic system installers, which Back 40 Land Services holds. However, Williamson County maintains additional local licensing requirements for septic contractors operating within the county. These requirements are separate from the state license and must be completed before a contractor can legally install septic systems in Williamson County.

Back 40 is actively working through that process. Once the county licensing is complete, we will update this page and begin accepting Williamson County septic installation projects. If you'd like to be contacted when that happens, reach out via the form or phone number on this page.

Williamson County Soils & Septic System Types

Williamson County's soil conditions vary significantly across the county and play a major role in determining what type of septic system a property requires. The Central Basin portions of the county — generally the eastern and central townships — tend to have Maury silt loam soils with reasonably good drainage. Many properties in those areas qualify for conventional gravity septic systems.

The Highland Rim portions of the county — particularly around Fairview, Pegram, and along ridge lines in the western townships — are a different story. Shallow limestone bedrock and clay-heavy Dickson and Guthrie series soils are common there. These conditions frequently result in LPP system requirements from TDEC, because conventional gravity drainage won't meet minimum treatment standards.

The only way to know what your specific property requires is a soil morphology study and perc test by a TDEC-licensed soil evaluator. That evaluation is independent of which contractor you hire for installation, so it can be completed now.

Conventional Gravity System

No pump or electricity — wastewater flows from the tank to the drain field by gravity. The lower-cost, lower-maintenance option for sites with suitable soil drainage.

Learn more about conventional systems

Low Pressure Pipe (LPP) System

A pump distributes effluent in timed doses through a shallow drain field. Required by TDEC on clay-heavy or shallow-bedrock sites — common across much of rural Williamson County.

Learn more about LPP systems

Williamson County Septic Permitting

All septic system installations in Williamson County require a permit from the Williamson County Environmental Health office in Franklin. The permit process includes a soil evaluation by a TDEC-licensed evaluator, a system design (LPP systems require a licensed engineer's stamped design), and a final inspection before the system can be backfilled.

Understanding what the permitting process entails — and starting the soil evaluation early — is one of the most effective ways to keep your project on schedule once installation is ready to begin. For a full walkthrough of the statewide process, see our guide: How to Get a Septic Permit in Tennessee.

How to Prepare Your Williamson County Septic Project Now

You don't have to wait to start making progress. Here's what you can do right now to move your project forward:

Schedule a Soil Evaluation

Hire a TDEC-licensed soil evaluator to assess your property. This determines your system type and starts the permitting process — and it can be done now, independent of which contractor you use.

Understand Your System Type

Your evaluator's report will tell you whether your property qualifies for conventional gravity drainage or requires an LPP system. This affects both your budget and your project timeline.

Review Williamson County Setback Requirements

The drain field must meet setback requirements from wells, property lines, streams, and structures. Understanding these before you finalize house placement or site plans prevents costly redesigns later.

Get Your Site Plan Together

The permit application requires a site plan showing property boundaries, proposed system location, well location, and nearby features. Having this ready accelerates the permit process once installation begins.

Reach out and let us know you're planning a Williamson County septic project. We'll add you to our list and contact you as soon as our county licensing is complete.

Site Preparation We Can Help With Now

While we complete the Williamson County installer licensing, Back 40 can still assist with land clearing, forestry mulching, grading, and site access work that prepares your property for a septic project. These are separate from the septic installation itself and do not require the county septic installer license.

Drain field area clearing without destroying the soil profile

Equipment access route establishment

Site grading and drainage improvements

Tree and brush clearing coordinated with your septic contractor

Active Septic Installation Service Areas

While Williamson County septic installation is pending licensing, Back 40 is actively accepting septic projects in:

Maury County

Columbia, Spring Hill, Mt. Pleasant & rural acreage

Rutherford County

Murfreesboro, Christiana, Rockvale, Eagleville & rural acreage

Frequently Asked Questions — Williamson County Septic

Related Resources

Conventional Septic Installation LPP Septic Installation Septic for New Construction Septic for Rural Acreage All Septic Services Land Clearing — Franklin, TN Conventional vs. LPP Guide Septic Cost Guide Septic Permit Guide

Licensing in Progress

Williamson County — Coming Soon

We're completing the Williamson County licensing process. Call or reach out and we'll let you know when we're ready to take on projects in the county.

(615) 609-0053

✅ Veteran-Owned & Operated

✅ TDEC State License Held

✅ Williamson County License Pending

✅ Site Prep Available Now