The septic field has to be planned before the house pad, driveway, and well lock up the site. Follow the permit sequence early so the soil work, fees, and inspections fit your building schedule.
Check sewer availability, get a soil evaluation, and obtain the TDEC permit before site work. A permitted installer then builds the approved system. Arrange inspection before backfill and save the completion record. State permit and inspection fees total $500 for conventional or $700 for alternative systems up to 1,000 gallons per day.
Get the utility's answer in writing for your parcel. A Spring Hill mailing address can sit in Maury or Williamson County, and Spring Hill's sewer-capacity limits can affect hookups. Don't assume from a nearby manhole.
Make the purchase contingent on a soil evaluation and septic permit that fit the house you want. Walking away from a bad lot is cheaper than an engineered system you didn't budget for.
A TDEC-approved soil consultant maps usable soil, depth to rock, and drainage. One Middle Tennessee consultant publishes about $1,500 for most individual lots, with 1 to 2 days of fieldwork and a map in about 2 weeks. Alternative systems need an extra-high-intensity soil map.
Mark property lines, the house and basement, the well, the driveway, utilities, the field, and the duplicate field. TDEC's application asks whether the house and lot are staked and for a sketch showing the well, driveway, and utilities.
TDEC says a septic permit should always be obtained before starting dirt work or construction of any building, including the pad. Apply online with bedrooms, occupants, water use, basement plumbing, the sketch, and the soil map. In unincorporated Maury County, the county's building permit application asks you to bring the TDEC septic permit, so it comes first.
Moving the house, adding a bedroom, or shifting the well or driveway can require a modification permit. Check before anyone moves dirt.
Give every licensed installer the same permit and drawings so the bids compare. Ask what's included for tanks, field, pump, electrical, and cleanup.
Fence both field areas before clearing. No parking, spoil piles, concrete washout, or utility trenches on them.
The installer notifies TDEC when the system is in. If there's a pump or other electrical part, Tennessee's rule requires electrical inspection approval before TDEC's construction inspection. Save the final approval and as-built sketch.
| TDEC item | Current fee | Notes |
|---|---|---|
| Conventional permit | $400 up to 1,000 gallons per day | $100 for each additional 1,000 gpd |
| Conventional construction inspection | $100 | Separate from the installer's price |
| Alternative system permit | $500 up to 1,000 gallons per day | $150 for each additional 1,000 gpd |
| Alternative construction inspection | $200 | Separate from soil mapping and engineering |
| Experimental system permit | $500 | Rare for a regular home |
| Soil map (private consultant) | About $1,500 per individual lot | One Middle Tennessee firm's published price, not a TDEC fee |
TDEC fees were rechecked on TDEC's construction-permit page in September 2026. Confirm the total in the portal before paying.
Sources: TDEC construction permit fees · Soil consultant price · Maury County building permit application (PDF)
TDEC says application review generally takes 10 days. Rule 0400-48-01-.21 requires a permit decision within 45 days after TDEC receives all required information. Missing soil work, drawings, or other details can delay that clock.
A registered third-party engineer may prepare the permit package or perform the final inspection through TDEC's third-party program. That route has its own submission and review process. Agree on the route, fees, and inspection responsibility before construction; TDEC still issues the permit and completion record.
That clock starts after the soil map is done, and the soil map is usually the long pole. Add a couple of weeks for the consultant, more in a wet spring. Alternative designs add engineering time on top.
The Columbia Environmental Field Office handles Maury County. Answer its questions fast and keep the plan stable. Every change restarts part of the conversation.
| Stage | Typical time | What slows it down |
|---|---|---|
| Soil map | 1 to 2 days fieldwork, about 2 weeks for the map (one consultant) | Wet weather, access, consultant backlog |
| TDEC review | Generally 10 days, 45-day maximum | Missing stakes, sketch, fee, or soil map |
| Installer scheduling | Varies by season | Bids on different scopes, long-lead tanks or pumps |
| Installation and inspection | Varies | Rock, rain, electrical sign-off, corrections |
| Decision | Septic impact |
|---|---|
| Number of bedrooms | Sets tank size (900 gallons for 3 bedrooms, 1,000 for 4) and field size |
| House and basement location | Decides whether gravity works or you need a pump |
| Basement bathroom | Often means a pump. TDEC's application asks about basement fixtures |
| Well location | Setbacks can take away otherwise usable soil |
| Driveway and parking | Can't cross the field. Rule 0400-48-01-.07 bars vehicle traffic on it |
| Utility trenches | Can't run through the field. The same rule bars underground utilities there |
| Future pool, shop, or ADU | Plan the space now or expect a modification permit later |
| Grading | Cutting or filling the field area can ruin the soil the permit relied on |
Rule text: Tennessee Rule 0400-48-01 (PDF)
The Tennessee Geological Survey's Maury County atlas maps limestone, sinkholes, unstable ground, and flood-prone areas across the county. On a single tract, a consultant can find deep, good soil on one rise and shallow rock a short walk away. The soil map decides where the house can go, so get it before the architect finalizes the footprint.
Sinkholes and closed depressions add setbacks and groundwater risk. A steep or bowl-shaped slope can push water into the field. Creeks, springs, and easements take usable area off the table too.
If conventional trenches won't fit, TDEC can look at low-pressure pipe, a mound, or an aerobic unit with drip lines after the extra-high-intensity soil map. Those work on tougher lots but add engineering, electricity, alarms, and a maintenance bill for the life of the house. Some tracts can't support a home at all.
| What TDEC asks | What to have ready |
|---|---|
| Landowner and site | Owner, address or parcel, lot size, and directions |
| Occupants and bedrooms | The final floor plan count, including any future bedroom |
| Water use | Anything unusual, like a home business |
| Basement | Whether it's excavated and whether it has plumbing |
| Staking | House and lot staked so the reviewer can match the plan to the ground |
| Rough sketch | Property lines, house, well, spring, driveway, and utilities |
| Soil map | From a TDEC-approved consultant, extra-high-intensity for alternative systems |
| Installer | Name them if you've picked one |
| Item | What it should include |
|---|---|
| TDEC record | Permit, any revisions, inspection result, and final approval |
| As-built sketch | Tank, lines, field, duplicate area, well, and panel, measured from the house |
| Installer file | Dates, photos before cover, tank and part models, and test results |
| Pump startup (if any) | Float settings, alarm test, and electrical sign-off |
| Aerobic or drip file | Maintenance contract, manuals, and service provider contact |
| Owner instructions | Pumping schedule, what not to flush, and keeping traffic off the field |
| Paperwork | Paid invoices, warranties, and exclusions |
About our sources. Maury Septic uses the sources listed below, including Current TDEC construction-permit sequence, fees, and review timing, Tennessee Rule 0400-48-01 design and fee provisions, a published Middle Tennessee soil-map price, Maury County geology, and Spring Hill sewer context. Follow the links for the underlying rules, fees, and guidance.
Tennessee Department of Environment and Conservation
Route available since October 1, 2024: registered third-party water resources engineers, eligible soil-scientist packages, submission instructions, and agency review. TDEC still issues the permit and certificate of completion.
Tennessee Department of Environment and Conservation
Who needs a permit, application requirements, review timing, current state fees, and inspection duties.
Tennessee Department of Environment and Conservation
Conventional, repair, and alternative-system applications, plus soil-map requirements.
Tennessee Department of Environment and Conservation
What an approved consultant evaluates, current qualification rules, and the state consultant list.
Tennessee Soil Science
A private consultant's published individual-lot price. This is a market example, not a TDEC fee or quote for a Maury County parcel.
Tennessee Department of Environment and Conservation
State mapping standards for soil depth, restrictive layers, drainage, absorption rates, slope, site features, and SSDS interpretations.
Tennessee Department of Environment and Conservation
Current state policy for digital permit sketches, attachments, reproducible field references, setbacks, and FileNet record quality.
Tennessee Department of Environment and Conservation
State licensing requirements and the current installer and pumper lookup.
Tennessee Department of Environment and Conservation
Environmental field-office routing for septic-system questions and applications.
Tennessee Secretary of State
Official current chapter text governing Tennessee subsurface sewage disposal systems.
Tennessee Geological Survey
State-published geologic, unstable-materials, flood-prone-area, mineral-resource, and sinkhole maps for Maury County.
City of Spring Hill
Current capacity-allocation framework adopted January 5, 2026.
No. TDEC says a septic permit should always be obtained before dirt work or construction of any building, including the pad. Grading can strip or compact the exact soil the permit depends on. Wait for the approved layout.
You should get one before you're locked in. Tennessee mostly uses soil maps by approved consultants rather than old-style perc holes. Make the contract contingent on a result that fits the house, well, drive, and both field areas. A neighbor's permit doesn't approve your lot.
The builder can suggest options, but the soil map, site limits, Tennessee rules, and TDEC's permit decide. Don't buy an aerobic unit or mound package before TDEC approves the full design.
Check with TDEC first. TDEC says a modification permit is required for an uninstalled system if the bedroom count changes or if house or site changes affect the initial or duplicate field areas.
Not automatically. Sewer availability, which county the parcel is in, city rules, zoning, soil, and TDEC approval are all separate questions. Get the parcel's sewer position in writing first. A delayed hookup doesn't create good soil.
Share the soil map, TDEC permit, bedroom count, and build timeline. We'll try to find a licensed installer with room on their schedule for your build. This form doesn't do soil mapping or issue permits.
Related: soil and site evaluation · septic permit guide · septic installation · septic system cost · ADUs and tiny homes · subdividing land · Spring Hill sewer status
Keep your permit, system sketch, and service records together. They help the next professional understand your property.