Permitting Walkthrough — Hamilton County, Catoosa, and the Surrounding Area

Excavation and concrete projects in our service area touch several jurisdictions depending on the scope. In rough order of frequency:

• Hamilton County (TN) Building Inspection — residential and commercial construction inside the unincorporated county. Chattanooga, Red Bank, East Ridge, Soddy-Daisy, and Lookout Mountain each have their own city codes departments that overlay county requirements.
• Catoosa County (GA) Code Enforcement — Ringgold, Fort Oglethorpe, Tunnel Hill, Rossville.
• Walker County (GA) Building Inspections — LaFayette, Chickamauga, Rossville (partial).
• Dade County (GA) Building Inspections — Trenton, Rising Fawn.
• Whitfield County (GA) Inspections — Dalton, Tunnel Hill (partial).
• Tennessee Department of Environment and Conservation (TDEC) — septic and on-site sewage; stream and wetland disturbance.
• US Army Corps of Engineers — work in jurisdictional waters of the United States.

If your project crosses any of these boundaries — or sits on a property line between them — you may have to file with more than one.

The exact trigger varies by jurisdiction, but most projects in the Greater Chattanooga area follow a similar pattern:

• New construction. Always a permit. Excavation is generally a sub-component of the building permit.
• Additions. Almost always a permit, including the footing work.
• Detached structures over a threshold. Pole barns, sheds, garages over a square-footage threshold (varies by jurisdiction, typically 120-200 sqft).
• Retaining walls. Most jurisdictions require a permit when the exposed face exceeds 4 feet. Engineered drawings required at that height in most counties.
• Septic and drain field work. Always permitted through TDEC in Tennessee, the Health Department in Georgia.
• Driveway aprons that connect to a public road. Driveway encroachment permits from the county or municipal road department.
• Demolition. Permitted; structures with asbestos or lead require additional filings.
• Work in or near streams, wetlands, or floodplain. Permitted; sometimes requires Section 401/404 certification.

Pad excavation alone — clearing and grading for a future project — typically does not require a freestanding permit as long as the work is consistent with the eventual building permit. But the building permit needs to be obtained before footings are poured.

For most excavation-related inspections:

• Footing inspection. Trench depth, width, soil bearing condition, rebar tie placement (if applicable), absence of standing water. The inspector looks in the trench. If the trench is sloppy or water is sitting in it, expect a re-inspection.
• Foundation inspection. Forms, rebar, and any waterproofing or damp-proofing. The inspector checks vertical and horizontal rebar spacing.
• Backfill inspection (in some jurisdictions). Whether walls are damp-proofed, drain tile in place, and gravel is set before backfilling.
• Septic inspection. Tank set, lines run to spec, distribution box level.
• Final inspection. Often combined with the building final.

The single most common reason an inspection fails is "wet trench." If a footing trench has standing water when the inspector arrives, the inspection doesn't pass. Plan around the weather and pump aggressively if needed.

Each county/city has a slightly different process, but the steps are similar:

1. Pre-application call. Five-minute call to the permits desk to confirm what's needed and what fees apply. This step is free and saves the most time downstream.
2. Submit the application with the required attachments: site plan, structural drawings, contractor information, and any specialty certifications (e.g., engineered retaining wall drawings).
3. Pay the permit fee. Fees scale with project size in most jurisdictions.
4. Schedule inspections through the jurisdiction's online portal or phone line.
5. Pass each inspection in sequence; you generally can't backfill until the foundation inspection has cleared.

Knowing the playbook means avoiding the missteps:

• Starting excavation before the building permit is issued. "We're just doing the pad" is a phrase inspectors have heard. If the project plans show a building, you need the building permit before the pad goes in.
• Building a retaining wall that turns out to be over 4 feet. Builders sometimes don't realize a stepped wall counts as a single wall. Get the engineered drawings ahead of time if any portion exceeds the threshold.
• Septic install before TDEC perks the site. The percolation test has to happen, and the system has to be designed around the test results. Building the system on speculation and then perking is backwards.
• Driveway apron that doesn't match the encroachment permit. A 20-foot apron when you have a 12-foot permit gets flagged.
• Demo without abatement. Anything pre-1980 likely has asbestos or lead-paint considerations. Document before demolition starts.