When pumping stops working, the system is telling you something. We handle septic tank replacement, leach field replacement, and full septic system replacement to NYSDOH 75-A: assessed, designed, permitted, dug, inspected, documented. One crew, start to finish.
We call back today, not next week.
Real replacement pricing, what is included, and the questions every CNY homeowner asks.
Tank, leach field, or full conventional system replacement runs $8,000 to $15,000. Engineered mound systems for high water table sites run $22,000 to $28,000. Every job gets a written fixed price after a free site visit.
Sewage backing up again shortly after pumping, a leach field that stays soggy or smells, standing effluent over the field, and drains that slow every time it rains. A biomat-clogged field does not recover; repeated pump-outs are rent, not a fix.
Yes, if the tank passes inspection. We perc test the replacement area, design the new field to NYSDOH 75-A, and tie it into the existing tank. If the tank is steel or cracked concrete, replacing it at the same time avoids digging twice.
Only if site conditions force it: high water table, shallow bedrock, tight clay soils, or small lots that cannot meet separation distances. That is what perc tests and the 75-A design step determine. Much of the lake plain north of Syracuse needs raised or mound systems.
Permits and design typically take 2-5 weeks through the county health department. On-site work runs 2-5 days for a conventional replacement, about a week for mound systems. The yard is rough-graded and seeded when we leave.
We do. County health department permit, design submission, inspections during construction, and the final as-built drawing all go through Backwell. You get one contract and one number.
A leach field replacement that reuses a sound existing tank costs less than a full tank-and-field job, typically landing in the lower end of the conventional range. The exact price depends on the new field type the perc test calls for: a conventional gravity field is the least expensive, a raised or mound field on a wet site costs more. Every job gets a written fixed price after a free site visit.
A conventional system uses a gravity-fed leach field and works where soils drain well and the water table is deep. A mound or raised system places sand fill above grade and pumps effluent up to pressurized laterals, and is required where the water table is high or bedrock is shallow. Much of the lake plain north of Syracuse and the shoreline around Oneida Lake needs a mound or raised design.
Septic replacement in New York is designed to NYSDOH Appendix 75-A and permitted through the county health department. Replacing a tank or field without a permit can block a future home sale and trigger code enforcement. Backwell pulls the permit, submits the design, schedules inspections, and files the as-built.
The honest line between a $1,500 repair and a real replacement.
Backups return weeks after pumping, the field stays soft and septic-smelling, or effluent ponds on the surface. That is biomat failure. The soil around the laterals is sealed and no amount of pumping reopens it. A new field in a fresh or reserve area, designed to current NYSDOH 75-A sizing, is the fix.
Steel tanks rust through, old concrete cracks at the seams, and baffles fall off. If the inspection shows structural failure, a new precast tank goes in. If you are already replacing the field on a 30-year-old system, replacing the tank in the same dig avoids paying for mobilization twice.
The lake plain north of Syracuse, lakefront parcels, and much of the Oswego and Oneida Lake shoreline cannot pass a standard perc test. Those sites take raised or engineered mound systems. It is premium work and we self-perform all of it: fill placement, pump chamber, pressurized laterals.
New construction? See septic installation. Not sure what is failing? Start with septic systems. Wet yards and field drainage: drain tile repair.
A septic system fails for one of two reasons: the tank loses its structure, or the leach field loses its ability to absorb. Pumping buys time against the symptoms. It does not rebuild either one.
Most calls we get for septic tank replacement and leach field replacement in Central New York come down to a system that is 25 to 40 years old and finally past saving. The tell-tale signs are consistent: sewage backing up indoors within weeks of a pump-out, a drain field that stays soggy or smells in dry weather, effluent surfacing over the laterals, and fixtures that drain slowly every time it rains. Those point to a biomat-clogged field. Once the soil around the laterals seals, it does not reopen, and no amount of pumping or additive reverses it. At that point repeated pump-outs are rent, not a repair.
The other failure is structural. Steel tanks rust through at the top and corners. Older concrete tanks crack at the seams and lose their baffles, which lets solids carry into the field and ruin it early. When an inspection shows a tank is compromised, a new precast concrete tank goes in. If you are already opening the ground to put in a new field on an aging system, replacing the tank in the same dig avoids paying to mobilize equipment twice.
Not sure whether you are looking at a repair or a full replacement? Read the warning signs in signs your septic is failing, or have us out for a diagnostic. If the fix is small, we will tell you it is a repair, not a replacement.
Every septic system replacement in New York follows the same regulated path. We handle all of it under one contract so you are not coordinating an engineer, a designer, the county, and a digging crew yourself.
The replacement system that goes back in is not always the one that came out. Code sizing has tightened over the decades, and the design is dictated by your soil and water table, not by what was there in 1985.
Where soils drain well and the seasonal water table sits deep enough, a conventional system is the simplest and least expensive replacement: a precast tank feeding a gravity-fed gravel-and-pipe or chamber leach field. This is the standard build across well-drained inland parcels in Onondaga, Madison, and Oneida counties.
Much of the lake plain north of Syracuse, lakefront parcels, and the shoreline around Oneida Lake and Lake Ontario sits over a high water table or shallow bedrock and cannot pass a standard perc test. Those sites take a raised or engineered mound system: sand fill is placed above grade, a pump chamber doses effluent up to pressurized laterals, and the drainfield is built into the mound. It is more material, more labor, and a longer build, but on a wet site it is the only design the health department will permit. We self-perform the whole thing, fill placement through pressurized laterals, rather than subbing it out.
For a fuller breakdown of designs and where each one fits, see types of septic systems.
Septic replacement in New York is regulated work. Systems are designed to NYSDOH Appendix 75-A, the state's residential wastewater treatment standard, and permitted through the county health department where the property sits. You cannot legally replace a tank or field on your own and skip the permit; an unpermitted system can block a future sale and trigger code enforcement.
We pull the permit, submit the design, schedule the required inspections while the system is open, and file the as-built when it closes. You get one contract and one phone number for the whole process. The county-by-county specifics, fees, perc-test timing, and review windows are laid out in NY septic permit requirements.
There is no single price for a septic replacement, because the cost is set by your site, not by a menu. The biggest factors:
Conventional tank, leach field, or full-system replacement in our area generally runs in the range shown above, with engineered mound systems landing higher. We do not quote a price off a phone call. After a free site visit and perc evaluation you get a written fixed price, with no allowances that balloon mid-job. For a deeper look at the numbers, see septic system cost in NY and our septic installation cost guide for Central New York.
Replacing a failed system and installing one on a new build share the same design and permitting path, but the work is different. Replacement means removing or abandoning the old system, working around an occupied house and existing landscaping, and tying into the building sewer that is already in the ground. If you are building new and have no existing system, that is a clean septic system installation. Either way it is the same crew and the same standard of work.
Town-by-town septic replacement pages for our Central New York service area.
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