$8,000 to $18,000 for most jobs. Here is why the range is that wide.
Drain tile is not a fixed-priced commodity. It is a linear-footage trade: longer perimeter, more material and labor, higher price. A 600 sq ft starter ranch with a partial basement has half the perimeter of a 1,800 sq ft two-story Victorian. Both can need drain tile. The quotes will look very different.
The other variable is what is between us and the footing. A bare slab in an unfinished basement is the fastest install. A finished basement with framing, drywall, and flooring requires tear-out and put-back. We do not refinish the basement, but we do have to demo to access the slab edge.
What moves the number up or down.
- Linear footage of the trench. The single biggest input. Full-perimeter drain tile on a 40 by 30 foot basement is 140 linear feet. Partial-perimeter on the same footprint might be 60 feet. We charge by the trench, not the basement size.
- Depth and footing condition. Most drain tile installs go to the top of the footing, roughly 18 to 24 inches below the slab. Older Twin Cities homes sometimes have deeper footings or unusual conditions (rubble fills, no footing visible) that change the dig.
- Sump pit and pump. If you do not already have one, a new sump pit (usually $1,500 to $3,000 added to the drain tile job) is a separate line item. Existing pit reuse saves that cost.
- Finished basement complications. If the basement is finished, we have to demo the bottom 18 inches of drywall, remove flooring near the perimeter, and protect the rest. That adds labor and disposal costs.
- Discharge and exit work. Where the sump pump discharges matters. A simple PVC exit through the rim joist is included. Cutting through block foundation, running through finished space, or running a longer discharge line are scope additions.
What a real drain tile quote should list.
- •Slab saw and break. Concrete cut and removed along the trench path.
- •Trench excavation to the top of footing, soil removed from basement.
- •Drain tile pipe (typically 4″ perforated PVC), wrapped in geotextile filter fabric.
- •Gravel bedding around the pipe (3/4″ washed rock, not pea gravel).
- •Concrete patch-back, fresh slab over the trench, finish flush to existing.
- •Sump pit and pump if part of scope. New pit lined and sealed, pump sized to flow.
- •Discharge line to exterior, code-compliant exit, splash block or extension.
- •Daily cleanup, dust filtration on saw, work area sealed.
- •Lifetime transferable warranty, written, in the file.
- •Refinishing your basement (drywall, paint, flooring).
- •Mold remediation in existing affected materials.
- •Foundation repair beyond what is encountered in the trench.
- •Exterior excavation or regrading (separate scope, separate page).
- •Disposal of contents you have not cleared from the basement.
If a quote does not itemize the above, the contractor either has not thought about the scope or is hiding the lump sum. Either way, ask for the itemization before signing.
When a quote looks too cheap.
A $3,500 drain tile quote on a 140-foot perimeter is not a bargain. It is a quote for something else.
The number itself is not the warning. The warning is what is missing from the scope. Common low-quote substitutions to watch for:
| Looks like drain tile | Actual drain tile | |
|---|---|---|
| Channel system | Plastic wall-track channel (e.g. WaterGuard) | Below-footing perforated PVC pipe in gravel envelope |
| Catches | Water that already entered the wall | Water before it reaches the wall |
| Trench | None, glued to slab edge | Excavated to top of footing |
| Slab | Not cut | Cut, drained, repoured |
| Warranty | Variable | Lifetime transferable, in writing |
| Typical price | $3K-$6K | $8K-$18K |
See our full breakdown of WaterGuard-style channel systems vs real interior drain tile. Both have their place, but they are not the same product and should not carry the same price tag.
- Quote lacks linear footage or square footage measurements
- Warranty is non-transferable, expires, or limited to materials
- Sump pump is not included and listed as an add-on after signing
- Pressure to sign today / discount that expires at end of visit
- Cash-only or down payment over 30%
Financing options.
We work with Acorn Finance for project financing. Pre-qualify with a soft credit pull, no impact on your score. Terms vary by approval.
See financing details, or call us and we will walk through it on the phone.