Cornload Estimates are computer-generated, not appraisals
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All field notes

Septic & land

A septic tank is only one part of the system.

Before buying a home on septic, get the permits, plans and pumping records, locate the tank and drainfield, and order a qualified inspection. Published national ranges put an inspection at $200 to $900 and a tank-and-drainfield replacement at $2,000 to $20,000 (2023).

Cornload field notes · Checked

Before your inspection deadline

  • Request permits, system plans, pumping records and past inspection or repair reports.
  • Locate the tank and drainfield, and ask about any designated replacement area.
  • Arrange a qualified system evaluation; ask what the inspection includes and what it cannot establish.
  • Discuss planned additions, bedrooms or other changes with the local permitting agency before assuming the existing system can serve them.

What it can cost

These are national ranges, labeled with the year they were published. Soil, permits and system design change the price on a given property, so get written local bids.

WorkRangePublished
Septic inspection$200 to $9002023
Drainfield repair$2,000 to $15,0002023
Tank and drainfield replacement$2,000 to $20,000 (average $6,000)2023

After you move in

EPA guidance recommends inspecting a typical household system at least every three years and usually pumping every three to five years. Actual needs depend on use and system design. Alternative systems with mechanical parts often need more frequent attention, generally annual inspections.

Use water efficiently, keep unsuitable waste out of drains, and protect the drainfield from vehicles and other damage. Ask your service professional for a schedule specific to the property.

Country homes on Cornload with septic

1,101 parcels on Cornload. From each home's MLS listing at its last sale. Showing 48, largest first.

Contra Costa County all Contra Costa parcels

  1. 3501 Byer RoadByron · 44 ac · $2.96M estimate
  2. 8191 Highland RdLivermore · 43.65 ac · $2.21M estimate
  3. 5995 Briones Valley RdBrentwood · 40.4 ac · $1.59M estimate
  4. 6445 Morgan Territory RdClayton · 40.05 ac · $2.87M estimate
  5. 4500 Kellogg Creek RdByron · 40 ac · $1.46M estimate
  6. 9615 Deer Valley RoadBrentwood · 40 ac · $2.12M estimate
  7. 6500 Highland RdSan Ramon · 40 ac · $2.71M estimate
  8. 25685 Marsh Creek RoadBrentwood · 37.5 ac · $1.52M estimate
  9. 100 Rancho De MariaMartinez · 35.62 ac · $2.36M estimate
  10. 3600 Byer RdByron · 28.37 ac · $4.91M estimate
  11. 4175 Briones Valley RdBrentwood · 22.97 ac · $1.15M estimate
  12. 9621 Deer Valley RoadBrentwood · 21.06 ac · $2.08M estimate
  13. 350 Camino Diablo RoadBrentwood · 20 ac · $1.52M estimate
  14. 110 Valley Hill DriveMoraga · 19.81 ac · $2.79M estimate
  15. 2660 Franklin Canyon RoadMartinez · 19.44 ac · $1.34M estimate
  16. 16700 Marsh Creek RdClayton · 16.84 ac · $730K estimate
  17. 100 Los BalconesAlamo · 14.59 ac · $3.19M estimate
  18. 7225 Johnston RoadPleasanton · 12.39 ac · $2.38M estimate
  19. 4411 Camino Vaqueros -Brentwood · 12.09 ac · $1.3M estimate
  20. 795 Silver Hills DrBrentwood · 11.4 ac · $1.83M estimate
  21. 1950 Tule LnKnightsen · 10.98 ac · $1.24M estimate
  22. 10961 Morgan Territory RdLivermore · 10.45 ac · $1.81M estimate
  23. 7151 Johnston RdPleasanton · 10.32 ac · $2.06M estimate
  24. 6840 Balfour RdBrentwood · 10.27 ac · $1.65M estimate
  25. 4175 Camino DiabloByron · 10 ac · $2.29M estimate
  26. 3520 Orwood RdBrentwood · 10 ac · $1.24M estimate
  27. 6780 Balfour RdBrentwood · 10 ac · $3.41M estimate
  28. 24200 Marsh Creek RdBrentwood · 9.77 ac · $1.79M estimate
  29. 2405 Sunset RdKnightsen · 9.54 ac · $1.95M estimate
  30. 2151 Bartels DrBrentwood · 9.49 ac · $2.33M estimate
  31. 2200 Delta RdKnightsen · 9.33 ac · $1.69M estimate
  32. 621 Bear Oaks LnMartinez · 8.96 ac · $2.73M estimate
  33. 2650 Sellers AveBrentwood · 8.86 ac · $2.23M estimate
  34. 7210 Johnston RdPleasanton · 7.91 ac · $3.41M estimate
  35. 940 Reliez Station LnLafayette · 7.14 ac · $10.16M estimate
  36. 300 Rancho de Maria roadMartinez · 6.38 ac · $1.73M estimate
  37. 10580 Morgan Territory RoadLivermore · 6.31 ac · $1.59M estimate
  38. 2000 Curry Canyon RdClayton · 6.11 ac · $940K estimate
  39. 1110 Russelmann Park RdClayton · 5.87 ac · $1.46M estimate
  40. 1000 Vintage DriveOakley · 5.65 ac · $1.35M estimate
  41. 1 Pinehurst RoadCanyon · 5.62 ac · $2.26M estimate
  42. 325 Bollinger Estates CtSan Ramon · 5.62 ac · $2.56M estimate
  43. 70 Sherburne HillsDanville · 5.6 ac · $2.54M estimate
  44. 1211 Morgan Territory RdClayton · 5.47 ac · $920K estimate
  45. 7770 Lone Tree WayBrentwood · 5.32 ac · $1.12M estimate
  46. 1600 Eden Plains RdBrentwood · 5.3 ac · $1.9M estimate
  47. 2336 Fisher AveBrentwood · 5.27 ac · $1.48M estimate
  48. 7400 Johnston RdDanville · 5.26 ac · $4.09M estimate

Sources

Checked Oct 7, 2026. Rules, programs and costs change. Confirm with the agency or a qualified professional before making a property decision.

Put the questions to work.

A Cornload Certified Land Specialist can help you check these details on a specific property.

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