Septic Tank Cost 2026: $3,500–$8,500 Typical Range

One conventional septic system at a US single-family house — the tank, the drain field, and the labor in one price, on a yard the crew can reach — often clusters around $3,500–$8,500. That is the typical septic tank cost. How much a septic tank costs, in that scope, is that system, not a lid and not a city sewer. The new septic tank cost, when the tank, the field, and the labor are in the price, is the same band. The septic tank cost to install, for that same system, is the same band. Concrete septic tank cost, for the tank alone, is $1,000–$3,000. A 1,000-gallon tank alone is $1,000–$1,500. An alternative system is $4,000–$15,000. An engineered system is $15,000–$50,000. The wider national spread, about $700–$50,000, covers a plastic tank alone at the low end and an engineered system at the high end. A new well on the same lot is the well drilling guide. A city lateral is the sewer line guide. A weekday repair visit is the plumber guide. These are typical planning ranges, not a survey and not a quote.

This page is one septic system at one house. A bid may call it septic tank cost, how much a septic tank costs, new septic tank cost, the septic tank cost to install, or concrete septic tank cost. The tank, the field, and the labor are in the price when the number is the typical band. It is not a well, which is the well drilling guide. It is not a sewer lateral, which is the sewer line guide. It is not a plumber’s repair visit, which is the plumber guide. A lid the owner finds in the grass is a smaller product. This page does not price it as the typical band.

The price of the job is the system the crew sets and the hour that puts the labor in the price. The system is the first cut. Whether the tank, the field, and the labor are already in the price is the second. A tank alone, a conventional system, an alternative system, and an engineered system are ways to buy one system. The system replaces a different system. It is not a second system under a price you already have.

The rows below are ways to read one job. They are not added together. The job table is one septic system at a yard the crew can reach. The typical band is one conventional system, tank, field, and labor in: that row in full. A 1,000-gallon tank alone replaces that rate from $1,000 to $1,500. An alternative system replaces it from $4,000 to $15,000. An engineered system replaces it from $15,000 to $50,000. Use a rate row only for a line the system row does not include. A rate the proposal already includes is not a second line.

Job	Typical cost
1,000-gallon tank, the tank alone	$1,000–$1,500
Conventional system, tank, field, and labor	$3,500–$8,500
Alternative system	$4,000–$15,000
Engineered system	$15,000–$50,000

Rate or added line	Typical planning range
Concrete tank, the tank alone	$1,000–$3,000
Plastic tank, the tank alone	$700–$2,500
Fiberglass tank, the tank alone	$1,400–$2,000
750-gallon tank, the tank alone	$700–$1,200
1,500-gallon tank, the tank alone	$1,500–$2,500
Labor, if the price left it out	$1,000–$4,500
Distribution box, if the price left it out	$500–$1,000
Engineering, permits, and inspections, if the price left them out	$1,000–$1,500
Drain field replacement, if the price left the field out	$3,000–$15,000

The job rows replace one another. Do not add an engineered price on top of a conventional price for the same yard. The rate row is a line the system left out, or another reading of the same tank. A rate the proposal already includes is not the rate row on top. A field the bid already folded into $3,500–$8,500 is not the field row on top.

A conventional system — the tank, the drain field, and the labor in one price — is typically $3,500–$8,500. The floor of the row is the typical floor. The top of the row is the typical top. The whole row is the typical band. Three thousand five hundred is a 1,000-gallon tank at $1,000, a distribution box at $500, labor at $1,000, and engineering, permits, and inspections at $1,000. Eight thousand five hundred is that tank at $1,500, the box at $1,000, the labor at $4,500, and engineering, permits, and inspections at $1,500. Three thousand five hundred can be this row at its floor. Eight thousand five hundred can be this row at its top or an alternative system inside its overlap. Ask which reading the bid is.

A 1,000-gallon tank alone — the tank, not the common system — is typically $1,000–$1,500. One thousand is $300 above the wider floor and $2,500 under the typical floor. One thousand five hundred is $800 above the wider floor and $2,000 under the typical floor. The tank sits under the typical band and inside the wider spread. One thousand can be this row at its floor. It is not a conventional system with a discount. One thousand five hundred can be this row at its top. A conventional price does not get this row on top.

An alternative system is typically $4,000–$15,000. The overlap with the typical band is $4,000–$8,500. Four thousand is $500 above the typical floor and the floor of this row. Eight thousand five hundred is the typical top and inside this row. Fifteen thousand is $6,500 past the typical top, $35,000 under the wider top, and the top of this row. From $4,000–$8,500 the job is inside the typical band and inside this row. From $8,500–$15,000 the job has left the typical band and stays inside the wider spread. Four thousand can be this row at its floor. Fifteen thousand can be this row at its top or an engineered system at its floor. A conventional price does not get this row on top. A straightforward conventional system can still be the typical band when the bid is that system, not this row with a second name.

An engineered system is typically $15,000–$50,000. Fifteen thousand is $6,500 past the typical top and the floor of this row. Fifty thousand is the wider top and the top of this row. The engineered system sits above the typical band and inside the wider spread, and $50,000 is the wider top. Fifteen thousand can be this row at its floor or an alternative system at its top. Fifty thousand can be this row at its top. A conventional price does not get this row on top.

Septic tank cost

Septic tank cost is this page when the crew is at the yard and the tank, the field, and the labor are in the price. Septic tank costs, for that system, are the same price. A bid that says septic tank cost and a bid that says the septic tank cost to install are the same dollars when the yard, the tank, and the labor match. The typical band, $3,500–$8,500, is one conventional system. It is not a second system stacked on a tank you already have.

The system is often a few days for a conventional tank and field the crew can reach. The tank is inside the system price. It is not a second bill on a number that was already the system. A 1,000-gallon tank at $1,000–$1,500 is a way to read the tank the system holds, not a second tank. One thousand plus $500 for a distribution box, plus $1,000 for labor, plus $1,000 for engineering, permits, and inspections, is $3,500, the typical floor, only when each of those lines was still out. One thousand five hundred plus $1,000, plus $4,500, plus $1,500, is $8,500, the typical top, only when each of those lines was still out. The parts and the lump sum are two readings of one system. They are not added. A bid that already names $3,500–$8,500 does not get the tank on top.

How much does a septic tank cost

How much a septic tank costs is the system at one house. One conventional system, tank, field, and labor in, is $3,500–$8,500. A bid that says how much a septic tank costs and a bid that says septic tank cost are the same dollars when the yard, the tank, and the labor match. A price near $1,000 should say a 1,000-gallon tank at its floor, not the conventional system. A price near $8,500 should say whether the number is this band at its top or an alternative system inside its overlap.

A 750-gallon tank alone is typically $700–$1,200. Seven hundred is the wider floor and the floor of this row. One thousand two hundred is $500 above the wider floor and $2,300 under the typical floor. The 750-gallon tank sits under the typical band and inside the wider spread, except that $700 is the wider floor. Seven hundred can be this row at its floor or a plastic tank at its floor. One thousand two hundred can be this row at its top. A 1,000-gallon price does not get this row on top.

A 1,500-gallon tank alone is typically $1,500–$2,500. One thousand five hundred is $800 above the wider floor and $2,000 under the typical floor. Two thousand five hundred is $1,800 above the wider floor and $1,000 under the typical floor. The 1,500-gallon tank sits under the typical band and inside the wider spread. One thousand five hundred can be this row at its floor or a 1,000-gallon tank at its top. Two thousand five hundred can be this row at its top. A conventional price does not get this row on top.

Eight thousand five hundred plus $8,500 for a second conventional system at the typical top is $17,000, which is $8,500 past the typical top, $2,000 past the alternative top, inside the engineered row, and $33,000 under the wider top. That $17,000 is two systems. It is not one 1,000-gallon tank. A number above $50,000 should name more system, a second system, a well, a sewer line, or a plumber’s other job. Ask which reading the bid is.

New septic tank cost

The new septic tank cost is a new system, not a tank on a receipt. When the job is one conventional system, that cost is $3,500–$8,500. A bid that says new septic tank cost and a bid that says septic tank cost are the same dollars when the yard, the tank, and the labor match. A price near $1,500 should say a tank alone at its top, not a new system with the field in. A price near $3,500 should say whether the tank, the field, and the labor are all in. Three thousand five hundred can be this band at its floor. It can also be the four lines that build that floor. Those can be the same dollars and the same job, read two ways. They are not two bills.

A new 1,000-gallon tank the price has not installed is $1,000–$1,500. One thousand is $2,500 under the typical floor. One thousand five hundred is $2,000 under the typical floor. It is the tank without the field and the labor. One thousand can be this reading at its floor. One thousand five hundred can be this reading at its top. A conventional price does not get the new-tank row on top.

Labor the same price left out is $1,000–$4,500. One thousand is $300 above the wider floor and $2,500 under the typical floor. Four thousand five hundred is $1,000 above the typical floor, $4,000 under the typical top, and the top of this line. The overlap with the typical band is $3,500–$4,500. From $1,000–$3,500 the labor sits under the typical band except at $3,500, and it stays inside the wider spread. From $3,500–$4,500 the labor is inside the typical band. It is an added line, not the conventional system. One thousand plus $1,000 is $2,000, which is $1,300 above the wider floor and $1,500 under the typical floor, only when the $1,000 left the labor out. One thousand plus $4,500 is $5,500, inside the typical band, only when the $1,000 left the labor out. One thousand five hundred plus $1,000 is $2,500, which is $1,000 under the typical floor, only when the $1,500 left the labor out. One thousand five hundred plus $4,500 is $6,000, inside the typical band, only when the $1,500 left the labor out. A bid that already names the labor does not get this row on top.

Septic tank cost to install

The septic tank cost to install is the labor on one system, not a tank with the labor left out. When the job is one conventional system, that cost is $3,500–$8,500. A price near $700 should say a plastic tank or a 750-gallon tank at the wider floor, not a conventional system with the labor in. A price near $3,500 should say whether the tank, the field, and the labor are all in.

A distribution box the same price left out is $500–$1,000. Five hundred is $200 under the wider floor. One thousand is $300 above the wider floor and $2,500 under the typical floor. One thousand plus $500 is $1,500, which is $2,000 under the typical floor, only when the $1,000 left the box out. One thousand five hundred plus $1,000 is $2,500, which is $1,000 under the typical floor, only when the $1,500 left the box out. Three thousand five hundred plus $500 is $4,000, inside the typical band, only when the $3,500 left the box out. Eight thousand five hundred plus $1,000 is $9,500, which is $1,000 past the typical top, inside the alternative row, and $40,500 under the wider top. A bid that already names the box does not get this row on top.

Engineering, permits, and inspections the same price left out are $1,000–$1,500. One thousand is $300 above the wider floor and $2,500 under the typical floor. One thousand five hundred is $800 above the wider floor and $2,000 under the typical floor. Three thousand five hundred plus $1,000 is $4,500, inside the typical band, only when the $3,500 left the permits out. Three thousand five hundred plus $1,500 is $5,000, inside the typical band, only when the $3,500 left the permits out. Eight thousand five hundred plus $1,000 is $9,500, which is $1,000 past the typical top and $40,500 under the wider top. Eight thousand five hundred plus $1,500 is $10,000, which is $1,500 past the typical top, inside the alternative row, and $40,000 under the wider top. A bid that already names the permits does not get this row on top.

A drain field the same price left out is $3,000–$15,000. Three thousand is $500 under the typical floor and $2,300 above the wider floor. Fifteen thousand is $6,500 past the typical top. It is also the alternative top and the engineered floor, and it is $35,000 under the wider top. The overlap with the typical band is $3,500–$8,500. One thousand plus $3,000 is $4,000, inside the typical band, only when the $1,000 left the field out. One thousand plus $15,000 is $16,000, which is $7,500 past the typical top, inside the engineered row, and $34,000 under the wider top. One thousand five hundred plus $3,000 is $4,500, inside the typical band, only when the $1,500 left the field out. One thousand five hundred plus $15,000 is $16,500, which is $8,000 past the typical top and $33,500 under the wider top. Three thousand five hundred plus $3,000 is $6,500, inside the typical band, only when the $3,500 left the field out. Eight thousand five hundred plus $15,000 is $23,500, which is $15,000 past the typical top, inside the engineered row, and $26,500 under the wider top. A bid that already names the field does not get this row on top.

Concrete septic tank cost

Concrete septic tank cost is the tank a crew sets in the hole, not the whole system with a second name. The concrete tank alone is $1,000–$3,000. A bid that says concrete septic tank cost and a bid that says septic tank cost are the same dollars only when both bids are the tank alone, or only when both bids are the conventional system. A price near $1,000 should say a concrete tank at its floor, or a 1,000-gallon tank at its floor, not the typical floor. A price near $3,000 should say a concrete tank at its top, not a conventional system.

One thousand is $300 above the wider floor and $2,500 under the typical floor. Three thousand is $2,300 above the wider floor and $500 under the typical floor. The concrete tank sits under the typical band and inside the wider spread. One thousand can be this reading at its floor. Three thousand can be this reading at its top. A conventional price does not get the concrete row on top.

A plastic tank alone is $700–$2,500. Seven hundred is the wider floor and the floor of this reading. Two thousand five hundred is $1,800 above the wider floor and $1,000 under the typical floor. The plastic tank sits under the typical band and inside the wider spread, except that $700 is the wider floor. Seven hundred can be this reading at its floor. Two thousand five hundred can be this reading at its top or a 1,500-gallon tank at its top. A concrete price does not get the plastic row on top.

A fiberglass tank alone is $1,400–$2,000. One thousand four hundred is $700 above the wider floor and $2,100 under the typical floor. Two thousand is $1,300 above the wider floor and $1,500 under the typical floor. The fiberglass tank sits under the typical band and inside the wider spread. One thousand four hundred can be this reading at its floor. Two thousand can be this reading at its top. A plastic price does not get the fiberglass row on top.

What the range includes

The typical band assumes one conventional system. The tank is in. The drain field is in. The labor is in. The yard is reachable. A distribution box is in. Permits and inspections the complete price names are in. A 1,000-gallon tank alone sits under the band. A 750-gallon tank sits under the band. A 1,500-gallon tank sits under the band. A concrete tank, a plastic tank, and a fiberglass tank sit under the band. An alternative system is in the band only from $4,000 to $8,500. An engineered system sits above the band. A well, a sewer line, and a plumber visit are not in the band.

How long the work takes depends on the system, and the bid’s schedule is the one that counts. A conventional system the crew can reach is often a few days. An engineered system is often longer. The time is a way to read that system. It is not a second clock on a price that was already the tank. The next system is not in this price.

The floor of the wider spread, $700, is a plastic tank alone, or a 750-gallon tank at its floor. It is not a conventional system someone discounted. The top, $50,000, is an engineered system at its top. It is not the conventional row plus every add-on. Eight thousand five hundred plus $4,500 for labor is $13,000, not $50,000. Eight thousand five hundred plus $8,500 for a second system at the typical top is $17,000, not $50,000. A number above $50,000 should name more system, a second system, or a job past this page. Ask which one.

None of the bands include labor on a system the bid already priced, except where that labor is a line the price left out. The labor line is $1,000–$4,500. One thousand is $2,500 under the typical floor. A completed system price does not get this row. One thousand plus $4,500 is $5,500 only when the $1,000 left the labor out.

None of the bands include a distribution box on a price the bid already built, except where that box is a line the price left out. The box line is $500–$1,000. Five hundred is $200 under the wider floor. Three thousand five hundred plus $500 is $4,000, inside the typical band, only when the $3,500 left the box out. A system that already names the box does not get $500–$1,000 on top.

None of the bands include permits and inspections the system price left out, except as their own row. That line is $1,000–$1,500. One thousand is $2,500 under the typical floor. A system that already names the permits does not get the permit row. A permit that already is in the job does not get $3,500–$8,500 on top.

None of the bands include a drain field on a price the bid already built, except where that field is a line the price left out. The field line is $3,000–$15,000. Three thousand is $500 under the typical floor. One thousand plus $3,000 is $4,000, inside the typical band, only when the $1,000 left the field out. Eight thousand five hundred plus $15,000 is $23,500, which is $15,000 past the typical top and $26,500 under the wider top. A system that already names the field does not get $3,000–$15,000 on top.

None of the bands include a well, which is the well drilling guide, often $4,500–$9,000 for about 150 feet, drilled and equipped, inside a wider spread of about $1,500–$24,000. Four thousand five hundred is the floor of that typical band. Nine thousand is the top of that typical band. Three thousand five hundred plus $4,500 is $8,000, inside this page’s typical band and inside that guide’s typical band. Three thousand five hundred plus $9,000 is $12,500, which is $4,000 past this page’s typical top, inside the alternative row, $3,500 past that guide’s typical top, and $11,500 under that guide’s wider top. Eight thousand five hundred plus $4,500 is $13,000, which is $4,500 past this page’s typical top, inside the alternative row, $4,000 past that guide’s typical top, and $11,000 under that guide’s wider top. Eight thousand five hundred plus $9,000 is $17,500, which is $9,000 past this page’s typical top, inside the engineered row, $8,500 past that guide’s typical top, and $6,500 under that guide’s wider top. That sum is a septic system plus a well only when each bid left the other out. A well price that already includes the septic system does not get this page on top.

None of the bands include a sewer line, which is the sewer line guide, often $4,000–$15,000 for a main line of about 50 to 80 feet, inside a wider spread of about $1,500–$30,000. Four thousand is the floor of that typical band. Fifteen thousand is the top of that typical band. Three thousand five hundred plus $4,000 is $7,500, inside this page’s typical band and inside that guide’s typical band. Three thousand five hundred plus $15,000 is $18,500, which is $10,000 past this page’s typical top, inside the engineered row, $3,500 past that guide’s typical top, and $11,500 under that guide’s wider top. Eight thousand five hundred plus $4,000 is $12,500, which is $4,000 past this page’s typical top, inside the alternative row, and inside that guide’s typical band. Eight thousand five hundred plus $15,000 is $23,500, which is $15,000 past this page’s typical top, inside the engineered row, $8,500 past that guide’s typical top, and $6,500 under that guide’s wider top. That sum is a septic system plus a sewer line only when each bid left the other out. A sewer price that already includes the tank does not get this page on top.

None of the bands include a plumber visit, which is the plumber guide, often $200–$500 for one weekday repair, inside a wider spread of about $100–$1,200. Two hundred is the floor of that typical band and $500 under this page’s wider floor. Five hundred is the top of that typical band and $200 under this page’s wider floor. Three thousand five hundred plus $200 is $3,700, inside this page’s typical band. Three thousand five hundred plus $500 is $4,000, inside this page’s typical band and the floor of the alternative row. Eight thousand five hundred plus $200 is $8,700, which is $200 past this page’s typical top, inside the alternative row, and $41,300 under this page’s wider top. Eight thousand five hundred plus $500 is $9,000, which is $500 past this page’s typical top, inside the alternative row, and $41,000 under this page’s wider top. That sum is a septic system plus a plumber visit only when each bid left the other out. A system price that already includes the crew does not get this page on top.

The band is the system price. A coupon on the system is not subtracted. Read the form before you take a number off the bid. A credit you have not received is not inside the planning range. This page does not price a coupon, and it does not name a percentage of the cost that comes back at resale.

Warranties are part of the contract, and this page is not a reading of one company’s form. A system, when the company offers a return for a line the crew missed, is about that line. Read it. The return visit is not a dollar line in the planning range.

A standard homeowners policy is built around sudden and accidental damage. A system you chose to install is the kind of project those policies commonly leave with the owner. A backup that damages a covered room, when the form responds to it, is a different question from a system you are buying. Read the form before you treat the policy as the budget. The $3,500–$8,500 band is not an insurance estimate.

This page does not price a city’s fee on top of a complete system price. A system that already names a fee does not get that fee on top.

As a cross-check, not a bid: one conventional system, tank, field, and labor in, is $3,500–$8,500, the typical band. A 1,000-gallon tank alone is $1,000–$1,500. An alternative system is $4,000–$15,000. An engineered system is $15,000–$50,000. Labor the price left out is $1,000–$4,500. If a bid and that reading are far apart, the bid is a different system, a left-out field, a second system, a well, a sewer line, or a plumber visit.

What moves the price

Driver	How it changes the bid
The system	One conventional system, tank, field, and labor in, is $3,500–$8,500, the typical band. A 1,000-gallon tank alone is $1,000–$1,500, under the typical band. An alternative system is $4,000–$15,000, and the typical band includes that row only from $4,000 to $8,500. An engineered system is $15,000–$50,000, above the typical band. The system picks the row. It is not a second bill.
The tank	A 750-gallon tank is $700–$1,200. A 1,000-gallon tank is $1,000–$1,500. A 1,500-gallon tank is $1,500–$2,500. Concrete is $1,000–$3,000. Plastic is $700–$2,500. Fiberglass is $1,400–$2,000. The tank is a reading of the vessel. It is not a second bill on a system that already names it.
The labor	Labor of $1,000–$4,500 is inside the system price when the bid names it. One thousand is $2,500 under the typical floor. Four thousand five hundred is inside the typical band. The labor is not a second bill.
The box	A distribution box the bid leaves out is $500–$1,000. Five hundred is $200 under the wider floor. A completed price of $3,500–$8,500 already holds a box the bid named. Three thousand five hundred plus $500 is $4,000 only when the $3,500 left the box out.
The permits	Engineering, permits, and inspections the bid leaves out are $1,000–$1,500. One thousand is $2,500 under the typical floor. A completed price of $3,500–$8,500 already holds that line when the bid named it. Eight thousand five hundred plus $1,500 is $10,000 only when the $8,500 left the line out.
The field	A drain field the bid leaves out is $3,000–$15,000. Three thousand is $500 under the typical floor. A completed price of $3,500–$8,500 already holds a field the bid named. One thousand plus $3,000 is $4,000 only when the $1,000 left the field out.
The second system	Two conventional systems at the typical top are $17,000, which is $33,000 under the wider top. That reading is two systems. It is not one 1,000-gallon tank.
The other job	A well is $4,500–$9,000 on the well drilling guide. A sewer line is $4,000–$15,000 on the sewer line guide. A plumber visit is $200–$500 on the plumber guide. A hole the bid is drilling, a lateral the bid is replacing, or a visit the bid is finishing does not get this page on top when that price already includes the system.

The system is the first cut, and it is not a tank you add to itself. A conventional system at $3,500, and the four lines that build that floor, can share those dollars. They are not the same system twice. Three thousand five hundred is the typical floor. Ask which system is in the price.

The tank is the second cut. A conventional system at $8,500, an alternative system inside its overlap, and the four lines at their tops can share those dollars. One is the typical top. One is the alternative row inside the band. One is the parts at their tops. The higher number is not a typical system that someone misread as a second tank.

The same conventional system in a lower-cost area and in a high-labor city can sit at opposite ends of $3,500–$8,500 without either bid being wrong. Ask whether the price is the system, the tank, or both, and ask whether a field, a box, or a second system is in. Well drilling, sewer line replacement, and plumber cost are the projects that meet this system and are not the system. Price them on their own pages. Two bids that disagree about the system, the tank, and whether the labor is included are not the same job.

DIY or hire

Hire the system. A trench that has to stay open, a tank that has to sit level, and a field that has to take the water are where a small miss becomes a second visit. The labor, the tank, and the field are the job. A Saturday with a tank on a soft hole is where those three get missed.

A lid the owner can find is a different product. That lid is not the conventional system. On the one pro system, one conventional system is $3,500–$8,500. That is the labor for the tank and the field.

Do not treat the tank alone as the system. If the field, the trench, and the permits still have to be done, you are pricing a crew’s job without the crew. The person on the excavator should say what happens if the hole or the field is wrong. Finding one lid in the yard is the owner’s part. A receipt for a tank is not this installed price.

Repair or replace

Replace the system when the tank or the field has failed and the house is staying. A pumping on a sound tank is not this band. A quote near $700 should say a plastic tank or a 750-gallon tank at the wider floor, not a conventional system. A quote near $3,500 should say whether the tank, the field, and the labor are in. A quote near $8,500 can be a conventional system at its top or an alternative system inside its overlap. Ask which reading the bid is.

Price a 1,000-gallon tank alone on $1,000–$1,500. Price an alternative system on $4,000–$15,000. Price an engineered system on $15,000–$50,000, and do not read that engineered system as the conventional band with a different name. Do not read a sewer line as the septic band with a different name.

Send a new hole for drinking water to the well drilling guide, typically $4,500–$9,000. Send a city lateral to the sewer line guide, typically $4,000–$15,000. Send a weekday repair to the plumber guide, typically $200–$500. If the same season includes any of those, they are separate scopes. Do not fold them into the septic price.

How long a system lasts is not a number on this page. A one-house system is not a warranty that the field will stay open. A new season of use is not a warranty that the yard will never need a repair. The bid’s scope is the work you bought.

How to use this number

Ask two or three septic installers for a written price that names the system, whether the price is a lump sum, whether the tank, the field, and the labor are included, whether the distribution box and the permits are already inside the price, and what happens if the hole or the field is wrong. Compare one conventional system, tank, field, and labor in, with $3,500–$8,500. Compare a 1,000-gallon tank alone with $1,000–$1,500, an alternative system with $4,000–$15,000, an engineered system with $15,000–$50,000, and a concrete tank alone with $1,000–$3,000. Keep the system and the labor inside those rows. Put a left-out labor line at $1,000–$4,500, and a left-out drain field at $3,000–$15,000, on their own lines.

A very low bid on one system is a reason to ask whether the labor is included, not a reason to celebrate. A quote near $700 should say a tank alone, not a crew on a conventional system. A quote near $3,500 should say whether the labor is in. A high bid should point at an alternative or engineered system, a hard field, a tight access, or the labor market. Two or three local bids on the same system, the same tank, and the same field are the number that matters. How this site sets the band is explained on the methodology page.