PercTallyTank gallons, trench length and what the perc test really decides.

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New install, replacement and the difference a failed field makes.

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Septic drain field replacement cost in Missouri for 1000 sq ft

A septic drain field replacement in Missouri
$12,940
1,000 ft² of drain field · typical range $7,963 – $24,884
Typical total$12.94 per ft² of drain field$12,940
Range you should see in bidsthree bids on the same scope normally land inside this$7,963 – $24,884
Labor portion55% of the job — this is the part that moves by state$7,117
Material portion45% — bought at national prices$5,823
Septic Tank Servicers and Sewer Pipe Cleaners pay in Missouriabout $26/hr · BLS OEWS May 2025, SOC 47-4071$53,050/yr
U.S. mean for the same tradeSOC 47-4071$53,500/yr
Versus the national priceMissouri trade pay runs −0.8% against the U.S. mean−$60

Notes

  • Where the number comes from. The national price for a septic drain field replacement is $13.00 per ft² of drain field — drain field replacement pricing published for 2026, $8–$25 per ft² of field. Labor is about 55% of that. Septic Tank Servicers and Sewer Pipe Cleaners in Missouri average $53,050 a year against a U.S. mean of $53,500 — a factor of 0.992 — so the labor half is scaled by that and the material half is not.
  • What is in the price: excavation, gravel or chamber media, perforated pipe, the distribution box, backfill, grading and labor.
  • What is not: the tank itself, a new perc test, engineered plans, a pump chamber if the site needs one, and county permits. These are the lines that turn a $12,940 quote into a $16,175 invoice, so ask about each one before signing.
  • Why state matters more than people expect. Materials ship at national prices; crews do not move. Missouri sits below the national mean by 0.8%, which lands on 55% of the job and moves the total by $60.
  • Use this as a bid check, not a quote. It prices an average job in an average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a per-unit average.

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