Typical residential french drain ranges around Midlothian
- Short single drain, 20 to 40 linear feet: roughly $1,500 to $2,500 when the outlet is close.
- Standard residential run, 40 to 80 linear feet: roughly $2,500 to $4,000. This is the most common size for a soggy back yard or side yard.
- Longer or deeper drain, 80 to 150 linear feet: roughly $4,000 to $6,500, especially when depth is 30 to 42 inches for foundation protection.
- Full yard drainage system: roughly $5,000 to $12,000 when the plan combines french drains, multiple catch basins, downspout tie-ins, and regrading.
What drives the price up or down
Length
Every linear foot uses pipe, gravel, fabric, and labor. Length is the single biggest line item on a quote. A 40 foot drain and a 100 foot drain built to the same spec differ mostly in materials and trenching time.
Depth
A shallow lawn drain at 18 inches moves faster than a foundation-side drain at 40 inches. Deep trenches also generate more spoil that has to be hauled off or spread. Blackland clay slows deep trenching noticeably.
Clay difficulty
Midlothian Blackland clay is heavy and sticky when wet and rock-hard when dry. Both extremes wear on trenchers and slow crews down. Wet clay can push a job by a full day. Dry, cracked clay chews through trencher teeth. A quote that assumes ideal conditions will not hold up.
Outlet distance and elevation
A french drain is only useful if the water it collects has somewhere to go. When a lot has a natural low corner, a curb cut, or a swale nearby, the outlet is cheap. When the lot is flat or the only outlet is far away, the pipe has to run farther or a pop-up emitter has to be built. On the rare flat lot with no daylight option, a small sump pump adds cost and ongoing electricity.
Catch basins and downspout tie-ins
Each basin adds a boxed inlet, fittings, gravel, and time. Downspouts tied directly into the drain line need cleanouts and adapters. These are the small line items that add up on full yard plans.
Site access
Narrow gates, tight side yards, mature trees, buried utilities, and hardscape that has to be protected all add labor hours. Crews sometimes have to trench by hand where a mini excavator cannot reach.
Restoration
Fresh sod, mulch, and hardscape put-back are separate line items on most quotes. On a large project this can be $500 to $2,000 by itself, depending on how the yard is finished.
Why cheap quotes usually fail on Blackland clay
The two shortcuts that push a price way down are also the two things that make a french drain fail in Ellis County. First, skipping filter fabric or using cheap fabric lets clay fines migrate into the gravel and the pipe, clogging the drain within a season or two. Second, running to a dry well or dead-ending into the clay instead of daylighting to a real outlet leaves the drain with nowhere to send water. When you are comparing quotes, ask specifically about fabric spec and where the outlet is.
Ongoing costs after install
- Annual catch basin cleanout, especially after fall leaf drop.
- Camera inspection on long runs if you ever notice flow dropping.
- Sod and mulch touch-up over the trench line for the first season.
What to do next
Numbers on a webpage are not a quote. The only real price is one from a licensed local pro who has walked your lot and confirmed the trench length, depth, and outlet. See the full Midlothian french drain cost guide, or start with french drain installation, yard drainage solutions, or foundation drainage. Ready to talk? Call (945) 292-7433 or fill out the form.