Upfront Septic provides septic services in Auburn, Washington and across South King County: septic tank pumping at a standard published price, 24-hour emergency septic service, inspections, repairs, new system and tank installation, ongoing maintenance, and commercial grease trap cleaning and pumping.
Auburn is a sewered city — wastewater from most homes and businesses flows through city-owned pipes and pump stations into King County's regional sewer system. But Auburn's own municipal code makes clear that not every building is connected: it requires new construction within 200 feet of a public sewer main to hook up, and it separately allows private on-site sewage systems where that isn't the case. Auburn also grew by annexing large unincorporated areas — West Hill and Lea Hill in 2008 alone added 15,000 residents — and a portion of the city's south end, around Lakeland Hills, actually crosses into Pierce County. If your property came into the city that way, or sits toward the city's edges, a septic tank is a real possibility, and it may answer to a different health department than you'd expect.
Call (253) 364-7416 or book service online — you'll get the price before the work starts, not after.
Most of Auburn is built out and sewered. The city's Utilities Department describes its role plainly: wastewater "flows through city-owned and maintained pipes and pump stations into King County's regional sewerage system," and Auburn bills customers monthly for both the city and county side of that service. For a resident on a typical in-city block, septic simply isn't part of the picture.
It's a different question at the edges. Auburn Municipal Code (ACC) 13.20.060 requires connection when a sewer main is available within 200 feet, but it also states that buildings not connected to public sewer "shall be connected to an on-site sewage system" — meaning the code itself contemplates septic as the normal fallback wherever a main hasn't reached. That gap shows up mainly in the newer, larger territory the city has annexed over the years. West Hill and Lea Hill, annexed in 2008, were unincorporated King County before that, developed under county rather than city rules; Lakeland Hills, annexed in the late 1990s, sits on a hillside at the city's southern edge and actually straddles the King–Pierce county line. Properties in areas like these were often built, platted, or extended before a city sewer main reached the street, and some still rely on a tank and drainfield today.
There's no Auburn neighborhood that's entirely on septic, and none where sewer can be assumed for every house. What the city's own code and its annexation history point to is a pattern of edges and history, not a single district.
Verify rather than assume. Auburn's Permit Center handles side sewer and connection questions; Public Health – Seattle & King County's septic records search at kingcounty.gov/SepticRecords will show whether a record drawing exists for your address. If your parcel is in the Lakeland Hills area, confirm with the county assessor or the health department directly which county — and which regulator — applies.
For the great majority of Auburn, on the King County side of the line, on-site sewage systems are permitted and inspected by Public Health – Seattle & King County, under King County Board of Health Code Title 13. The City of Auburn controls the sewer side of the equation — availability, side sewer permits, and connections — through ACC Chapter 13.20. For the small slice of the city that falls in Pierce County around Lakeland Hills, the Tacoma-Pierce County Health Department (TPCHD) is the regulator instead, under its own Environmental Health Code, and Pierce County's separate rules and terminology apply there, not King County's.
Connection requirements. ACC 13.20.060 requires a property to connect to public sewer when a main is available within 200 feet — for new construction, and for existing development where a failing on-site system needs repair or where new construction would affect it. The distance is measured "the shortest route in road rights-of-way and easements consistent with the comprehensive planning," not as the crow flies. This lines up with King County's own connection rule for the urban growth area, which uses the same 200-foot standard under Board of Health Code 13.04.050(B). Where sewer genuinely isn't available, ACC 13.20.080 and 13.20.090 allow a private disposal system "as allowed by and in accordance with the provisions of the county health authority," designed by a registered professional engineer or certified septic designer, and operated at the owner's expense.
Inspections. King County sets inspection frequency by system type under Title 13: conventional gravity systems without a pump are inspected every three years, while pressure distribution systems, mounds, sand filters, and proprietary units such as ATUs are inspected annually. The county's own website sometimes describes the initial inspection on a new non-gravity system, done at six months, as if it were the ongoing standard — it isn't; the adopted code sets the recurring interval at once a year.
Pumping. There's no fixed pumping interval in the code. The owner is responsible for checking solids and scum buildup periodically and pumping when the check shows it's needed — in practice, tank size, household size, and water use decide the interval.
Selling a home. Before a King County septic property changes hands, the seller needs a property transfer inspection by a licensed on-site system maintainer, filed with Public Health. It isn't required again if one was completed within the previous twelve months and the property hasn't changed hands since. (Pierce County's equivalent, used only for the Lakeland Hills area that falls in that county, is called a Report of System Status — a different form with a different name; don't confuse the two.)
Repairs and refusal to connect. Repairing an on-site system without a health department permit is prohibited outside a short list of minor fixes. Auburn's code adds its own backstop: a property owner who declines to connect despite being required to still owes the city's monthly sewer rate "regardless of hookup to the available sewer" under ACC 13.20.070.
Upfront Septic works inside this structure rather than around it. We pump and inspect, tell you plainly what condition the system is in, and flag when a job is going to need a health department permit or a call to the city before you commit to it.
The warning signs are usually there before a backup: odors around the tank or drainfield, standing water or unusually lush grass over the drainfield, slow drains throughout the house rather than at one fixture, and gurgling plumbing. Stop adding water — no laundry, no dishwasher, minimal flushing — and call for service.
In Auburn, a failed system can force the connection question, not just a repair. ACC 13.20.070 states that once an on-site system becomes inoperable, as determined by the county health authority, "the building served by the failed system shall be required to connect to an available public sewer in order to be habitable" — but only where the city permits that connection, which in practice means a main is close enough. If a main is within 200 feet, plan on connecting rather than replacing the drainfield. If it isn't, King County's permitting process for a repair or a new system, through a licensed designer, remains the path — and on the Pierce County side of Lakeland Hills, that process runs through TPCHD instead.
Before paying for a repair design, it's worth confirming availability in writing. Auburn's Permit Center and Utility Billing Division (253-931-3038) can tell you whether your address is inside the 200-foot connection zone; if it is, a repair may not be approvable regardless of cost. Connecting isn't free either — it typically means a side sewer permit from Auburn's Permit Center, King County's system development charges, and the cost of the side sewer line itself. Both King County's septic maintenance rebate program and Craft3's Clean Water Loan can help with septic repair, replacement, or connection costs for King County properties; ask what currently applies before assuming the number is out of reach.
When it's urgent, don't work through it alone — see our emergency septic services in Auburn, or read more about septic repair and service in Auburn.
Two counties, two regulators. The Lakeland Hills area's position on the King–Pierce line isn't just trivia — it decides which health department permits your system, which inspection and sale rules apply, and even what the property-transfer paperwork is called. Don't assume King County rules apply to a Lakeland Hills address without confirming which side of the line the parcel sits on.
Annexed areas carry county-era history. West Hill and Lea Hill spent decades as unincorporated King County before joining Auburn in 2008. Properties built under that earlier jurisdiction, before city sewer extended down every street, are more likely to still have an original tank and drainfield — and more likely to have thin or missing paperwork on file.
The valley floor floods. Auburn sits largely in the Green River valley, low-lying ground that has a documented history of seasonal flooding and high groundwater. A drainfield that works fine in a dry August can show wet spots and slow drains once fall rains and higher water tables return — that pattern usually means the system is near its limit, not reacting to one bad week.
Distance from a main matters more than the neighborhood name. Because Auburn's own connection trigger is a 200-foot distance test rather than a zoning designation, two houses on the same street can be on opposite sides of the requirement depending on exactly where the main runs. Don't assume your neighbor's situation tells you anything about your own.
Older homes, incomplete records. As in most cities this size, homes built before city or county recordkeeping caught up often have no septic record drawing on file. If nothing turns up in King County's records search, locating the tank and lids is simply part of the first service visit.
Commercial properties. Restaurants and food-service businesses need an approved FOG (fats, oils, and grease) control plan to get or renew an Auburn business license, and grease interceptors still need scheduled pumping even on a sewered property. We handle grease trap cleaning and pumping alongside our septic work.
Check with Auburn's Permit Center for sewer availability, and search kingcounty.gov/SepticRecords for a record drawing under your address. If your property is in the Lakeland Hills area, first confirm whether it falls in King County or Pierce County, since the regulator and the records system differ. A lid or riser in the yard with no side sewer record generally means septic.
For most of the city, Public Health – Seattle & King County permits and inspects on-site sewage systems under Board of Health Code Title 13. The City of Auburn separately controls sewer availability and connections under ACC Chapter 13.20. In the small Pierce County portion around Lakeland Hills, the Tacoma-Pierce County Health Department is the regulator instead.
King County does, and it applies across the King County portion of Auburn. Conventional gravity systems are inspected every three years; pressure, mound, sand filter, and proprietary systems are inspected annually. Reports go to Public Health, and a system that falls behind can create a compliance problem that surfaces later, often at a sale.
There's no fixed interval in the code. It depends on tank size, household size, and how quickly solids build up — which is exactly what a routine inspection tells you. When we pump, we let you know what the tank looked like and roughly when to expect us back.
On the King County side, yes: a property transfer inspection by a licensed on-site system maintainer is required before title transfers, unless one was completed within the previous twelve months. On the Pierce County side of Lakeland Hills, the equivalent is TPCHD's Report of System Status — a different process under a different name.
Often, yes. Under ACC 13.20.070, a building served by a failed on-site system must connect to an available public sewer to be considered habitable, where the city permits that connection — generally meaning a main within 200 feet. If no main is that close, a permitted repair or replacement stays on the table.
Only where public sewer genuinely isn't available. ACC 13.20.080 and 13.20.090 allow a private disposal system in that case, designed by a registered engineer or certified designer and approved by the county health authority. See septic system installation in Auburn for how we handle installations that qualify.
Yes — 24-hour emergency septic service throughout Auburn and South King County. Call (253) 364-7416. If you're on public sewer and sewage backs up with no water running, the blockage may be in the city's main; Auburn Maintenance & Operations can be reached at 253-931-3048.
If it's been a few years with no problems, that's routine pumping with an inspection. If drains are slow throughout the house or you notice standing water or odors near the tank, that's a service call to diagnose first. If you're selling, it's a property transfer inspection. Describe what you're seeing when you call and we'll tell you which one fits.
Upfront Septic is a septic company in Auburn, WA serving homeowners, property owners, and businesses across South King County. We handle:
Call (253) 364-7416 or book service now. You'll get a full price before we start, and a straight answer about what your system actually needs.
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