Concrete
Heavy and rigid. Plan lifting access; inspect covers, walls and seams.
Septic Tank Installation & Replacement in Chattanooga, TN
We provide septic tank installation and replacement to Chattanooga, TN. We plan the tank and drain field around the home, soil and groundwater conditions. We also provide 24-hour septic repairs.
Tennessee residential minimums include 750 gallons through two bedrooms, 900 for three and 1,000 for four, adding 250 gallons per additional bedroom. The field and any advanced equipment need their own approved design.
Tennessee Tank Sizes & Materials
A three-bedroom home has a 900-gallon state minimum example; four bedrooms have a 1,000-gallon example. These are storage volumes, not the daily treatment rate or a measured Chattanooga average.
| Bedrooms | Minimum tank capacity |
|---|---|
| 2 or fewer | 750 gallons |
| 3 | 900 gallons |
| 4 | 1,000 gallons |
| 5 | 1,250 gallons |
Add 250 gallons for each bedroom beyond four. The approved design and local requirements control. For pumping, confirm actual installed capacity; for replacement, also evaluate the field and required treatment.
Fiberglass
Lighter shell. Support, backfill and sound connections matter.
Polyethylene
Lightweight molded plastic. Follow model-specific burial and groundwater requirements.
Tank shell, field and pumps have different service lives. Choose approved products and methods suited to the property.
Confirm Sewer at the Parcel
Use Chattanooga city contacts for city sewer questions. WWTA serves unincorporated areas and selected municipalities; it does not operate City of Chattanooga sewers.
Evaluate the Actual Site
Soil depth, wetness, slope, rock, setbacks and a usable replacement area influence the design. A larger tank alone cannot correct unsuitable receiving soil.
Get the Correct Permit
Apply to Hamilton County Groundwater Protection through OpenGov before regulated work or dirt work affecting the site. The design may require soil mapping or a qualified professional package.
Define Replacement Scope
Identify which old components remain usable. Include tank retirement, excavation, equipment, field work, access and restoration in the proposal.
Inspect Before Covering
Coordinate final inspection and the required Certificate of Completion. Keep the approved layout and completion records with the property.
Read our Chattanooga septic sizing, materials and care guide.
Septic Tank Installation & Replacement FAQs
Practical answers for Chattanooga homes and businesses.
Can a conventional system be installed?
Only when the soil evaluation and approved design support it. Some sites need another treatment or distribution method.
Does the starting price cover every property?
No. Required design, access, equipment, permits and field scope change the final proposal.
A Clear Plan for Your Septic System.
Tell us where you are, what is happening and the service you need.