A septic to sewer conversion in metro Atlanta combines a five figure budget, a multi department permitting process, and a direct effect on how a house presents at market. If a sewer main already runs in your street, or a drain field is failing while you prepare to list, the question stops being theoretical. Here is how availability is confirmed, what each jurisdiction publishes for fees, what happens to the old tank, and how to weigh the work at resale.
How Do You Find Out If Sewer Is Available at the Street?
Call the utility that owns the sewer line and give them your specific address. Availability is parcel specific, not neighborhood specific, and a neighbor on sewer is not proof that you can connect. DeKalb County's Department of Watershed Management takes availability questions at 770-621-7272. Cobb County Water System answers at 770-419-6200. Fulton County routes connection applications through its Department of Public Works.
The answer has two parts: is there a main in the right of way near your property line, and does that main have capacity. DeKalb separates them. Its conversion instructions direct homeowners to call Watershed Management for the address check, send a sewer capacity evaluation request to the county's sewer capacity mailbox, then work with DWM Planning and Development at 404-687-3599 for approval and a stamped plan.
When There Is No Main in Your Street
If the main does not reach you, the project shifts from connection to extension and the cost structure changes completely. Fulton County describes a petition path for unserved areas: staff review the area for feasibility, contact the homeowners with the findings, and if conditions are favorable a preliminary design goes to the Board of Commissioners. Cobb County Water System states that where a group of homeowners with failing septic systems petitions for an extension, the cost of construction will be shared by the Water System and the residents served. That path runs on a much longer calendar than a connection for a house with a main already in the abutting right of way.
Is a Homeowner Required to Connect to Sewer When It Becomes Available?
Georgia's on-site sewage management rules address this directly. Under Department of Public Health Chapter 511-3-1, connection shall be made to a public or community sewage treatment system if such a system is available within two hundred feet of the property line, or available in a public right-of-way abutting the property. The same rule provides that if an existing on-site system fails, immediate connection shall be made where such a system is available.
Those rules carry a January 2016 effective date and are administered locally by county boards of health, so the practical answer comes from your county. They do contain a limited exception: a failing residential system under 2,000 gallons per day may avoid mandatory connection where repair or replacement meets the criteria and sufficient suitable soils exist on the lot, as determined by the county board of health. Confirm your parcel with that office, and review the Georgia on-site sewage management rules at Chapter 511-3-1 directly.
How Much Does It Cost to Connect a House to Sewer in Metro Atlanta?
There is no single metro number, because the cost is assembled from separate pieces: the utility's capacity or connection fee, a tap fee, a plumbing permit, the private lateral from the house to the tap, abandonment of the old tank, and yard restoration. Published utility fees alone commonly land in the low to mid four figures, and the plumbing work is quoted separately.
What Each Jurisdiction Publishes
Gwinnett County publishes the most homeowner facing number of the group. Its residential septic to sewer procedure for unincorporated Gwinnett sets the standard fee at $4,172 for a three quarter inch meter: a $4,147 System Development Charge plus a $25 permit fee. Gwinnett's rates and fee schedule dated January 2026 carries the same $4,147 charge. The separate plumbing only permit runs 0.6 percent of the construction estimate with a $30 minimum, and Gwinnett lists a mainline sewer tap fee of $550 each.
Cobb County Water System's schedule of rates, charges and fees effective June 1, 2026 lists a Residential Sewer Tap Installation Fee of $1,100.00 and a typical single family residential wastewater System Development Fee of $2,900.00. Where an extension is involved, Cobb lists a Sewer Extension Fee of $2,300.00 per connection plus the System Development Fee.
Fulton County's connection fee schedule, revised January 1, 2026, prices a new five eighths to three quarter inch meter installation at a $1,575 system capacity fee plus $2,576 for the meter. Sewer fees in Fulton are set by basin rather than one countywide figure, and for a three quarter inch or smaller meter the published amounts range from $1,681 to $4,062. Certain basin figures include a $1,200 Cobb County surcharge. That structure is why a single quoted sewer connection cost Fulton County number tends to mislead: two houses a few miles apart can owe very different amounts. Fulton takes applications at 404-612-3421 and processes them within ten business days.
DeKalb County's residential conversion instruction sheet lists a Sewer Access Fee of $1,811.93 plus a $20.00 technology fee. That sheet carries no revision date, so confirm the current amount with the county before budgeting.
The Costs No Fee Schedule Shows
None of those figures include the private side. The lateral from the house to the tap scales with distance, depth, rock, driveway crossings, and any need for a grinder pump where gravity does not work. Tank abandonment is a separate line, and so is restoration: regrading, retiring the old field lines, and replanting. Get the estimate itemized.
What Has to Happen to the Old Septic Tank?
The state rules are specific. Georgia Rule 511-3-1-.17 provides that when use of a septic tank is discontinued, the property owner shall either have the abandoned tank pumped out by a certified pumper and fill the empty tank with sand, soil, or rock, or have the empty tank removed. Counties add their own sign off on top of that, and the sign off is the part that matters at closing.
Gwinnett tells homeowners to have the plumber's estimate cover emptying and crushing the existing tank or filling it with concrete or gravel, and requires two inspections: one for the connection to the sewer cleanout, and one after the tank is cleaned out and crushed. Its Environmental Health office takes septic questions at 770.963.5132. DeKalb requires that once the connection is complete the customer notify the DeKalb County Health Department at 404-508-7900 and follow its abandonment guidelines. For an unincorporated Gwinnett property, work through the Gwinnett County residential septic to sewer procedure.
How Long Does a Septic to Sewer Conversion Take?
Published timelines are thin, which is worth knowing before you commit to a date with a buyer. Fulton County processes connection applications within ten business days, and Gwinnett requires two separate construction inspections. Beyond those published steps the calendar depends on plumber availability, the length of the run, and how quickly the health department closes out the tank.
Build the schedule from written commitments rather than assumptions. Sequencing matters too: utility approval and the stamped plan come before the plumbing permit, and the permit comes before any digging.
Selling a House on Septic in Atlanta When the Field Is Failing
A drain field that surfaces effluent or backs up during a listing period changes the transaction immediately. It is a known material condition, it belongs in your disclosure, and under the state rules a failing system can trigger the mandatory connection requirement where sewer is available. The practical choice is to address it before listing, or to price and disclose it and let full open market exposure do its work.
Market conditions inform that choice. Georgia MLS data reported in September 2026 put the August 2026 metro Atlanta median sales price at $400,000, down 1.7 percent year over year and 4.8 percent from July, against 22,897 active listings. Georgia MLS chief marketing officer John Ryan described the shift as a market where homes now compete for buyers rather than buyers competing for homes. With that much standing inventory, a house carrying an open system problem competes against houses that do not, which is the same logic behind which Atlanta home inspection issues sellers should fix first.
Does Converting to Sewer Add Value at Resale?
Treat this as analysis, not a return calculation. A completed, permitted sewer connection removes a category of buyer objection: no pumping schedule, no field to locate, no replacement area to preserve, no follow up questions about an on-site system. Removing objections tends to widen the buyer pool and shorten negotiation. It does not come with a guaranteed dollar recovery, and no one should promise you one.
Buyers who have researched on-site systems arrive with a checklist much like the one we lay out for anyone buying a metro Atlanta home on a septic system: permit records, tank size and location, pumping history, and a usable replacement field area. A sewer connection eliminates every item on it. The value question belongs in a market analysis of comparable sales in your submarket, comparing recent sales on sewer against recent sales on septic at similar price points and property types. That is a price opinion built on local data, not a formula.
What to Document for the File
Undocumented work is worth far less at the closing table. Keep one file with the utility's capacity determination, the stamped connection plan, the fee receipts, the plumbing permit, both inspection approvals, the certified pumper's receipt, the health department's abandonment confirmation, and the plumber's invoice and license number. That file proves the connection is permitted and complete and closes out the old system in the county record. Sellers who have handled permitting gaps know the cost of an incomplete file, a theme running through selling a metro Atlanta home with an unpermitted basement or addition.
FAQ
Can I keep my septic system if sewer is now available in my street? Georgia's rules require connection when a public or community system is available within two hundred feet of the property line or in an abutting public right-of-way, and require immediate connection if an existing system fails and service is available. A narrow exception exists for certain failing residential systems, determined by the county board of health.
Who actually does the work? The utility approves the connection point and collects its fees. A licensed plumber pulls the permit and installs the lateral. A certified pumper empties the tank, which is then filled or removed per the state rule. The county health department records the abandonment. In DeKalb the plumber must contact the water and sewer inspector before work begins.
Do the county fees cover the pipe to my house? No. The published connection, capacity and tap fees are utility charges. The lateral from the house to the tap, the tank abandonment and the yard restoration are separate, and are quoted by your plumber and septic contractor. Gwinnett states that the customer provides excavation, backfill, restoration and pavement repairs on a mainline tap.
Conclusion
A septic to sewer conversion is a permitting project first and a plumbing project second. Confirm availability and capacity with your county water or public works department at your exact address, get an itemized estimate from a licensed plumber that covers tank abandonment and restoration, and close the loop with the county health department so the old system is retired in the record. Published fee schedules in Fulton, Cobb, Gwinnett and DeKalb point to utility charges in the low to mid four figures before any private work, and the private work is where the range widens. Contact The Agency Atlanta to talk through your property, your timeline and how this decision fits your plans for the house.
