If water ponds in your Orange County yard after storms, or if a low corner of your property stays squishy for days after the rain stops, there’s a good chance someone has suggested a French drain. Here’s what it actually costs in OC in 2026 — and when it’s the right fix.
The short answer
Typical coastal OC residential French drain installations run $55 to $150 per linear foot installed, with most straightforward projects landing at $2,400–$4,500 for a basic run.
The range is wide because French drain pricing is driven almost entirely by three variables: length, depth, and access.
What moves the number
1. Length
Most residential French drains run 20–60 linear feet. Pricing per-foot drops a bit as the job gets longer (fixed setup costs spread across more linear footage).
2. Depth and soil type
A 2-foot trench through coastal sandy-loam is a very different job from a 3-foot trench through decomposed granite or caliche. OC soils vary dramatically even within a single property — sandy-loam near the coast in Huntington Beach and Newport Beach, heavier clay pockets inland around Westminster and Garden Grove. On heavier clay or rocky sites, plan for higher pricing.
3. Access
Can the mini-excavator fit through the side yard? Do we have to hand-dig a 40-foot trench because the only approach is through a tight walkway? Hand-dig trenching can run $150+ per linear foot — sometimes double machine-dig pricing.
4. Discharge point
A French drain has to drain to somewhere. If there’s a daylight point at the property edge (street, alley, swale), that’s easy. If the water has to be pumped or channeled to the curb 80 feet away through hardscape, that’s a different conversation.
5. Tie-in to existing drainage
Connecting to existing downspout drains, catch basins, or dry wells adds fittings and labor.
What a French drain actually is
The name gets misused. A proper French drain is:
- A trench (12–24” wide, typically 24–36” deep)
- Lined with filter fabric
- A perforated pipe laid in the bottom
- Backfilled with clean drainage rock (usually 3/4” crushed)
- Capped with filter fabric
- Topped with soil or decorative rock
Water soaks through the surface, through the rock, into the pipe, and flows to the discharge point. Done right, it lasts 20–30 years.
When a French drain is the right fix
Good candidate situations:
- Low spot that holds water after rain and doesn’t drain naturally
- Runoff from a neighbor’s property accumulating on yours
- Water seeping into a crawlspace or against a foundation (French drain along the foundation)
- Hillside base where water accumulates before it can run off
When a French drain is NOT the right fix
Some problems look like drainage problems but need a different solution:
- Surface runoff moving the wrong way — often a regrading job, not a drain
- Downspout discharge onto the yard — usually a solid downspout extension is the cheaper fix
- Driveway or patio flooding — channel drain (linear trench drain) is typically better than French
- High water table seasonal issues — may need a sump pump system, not a French drain
We’ll tell you which situation you have after we walk the yard — the wrong solution can cost as much as the right one and not solve the problem.
2026 Orange County French drain pricing in detail
| Scope | Typical price |
|---|---|
| Basic 20–30 ft run, easy access, good discharge | $2,400–$3,500 |
| Longer run (40–60 ft), standard conditions | $3,500–$6,000 |
| Hand-dig trenching (tight access, 30–40 ft) | $5,500–$8,500 |
| Complex job (multiple runs, clay, limited discharge) | $7,500–$14,000+ |
Add-ons that are common:
- Catch basin / atrium grate tie-in: $200–$500 each
- Sump pump install (if gravity-drain isn’t possible): $1,800–$3,500
- Hardscape patching after trench: varies by surface
What our process looks like
- Walk the yard during or just after a rain if possible — easiest way to diagnose accurately. If that’s not feasible, we look for the telltale signs: moss growth, soil compaction patterns, wear marks.
- Determine the water source and target — where’s it coming from, where does it need to go.
- Quote two options when sensible — the full fix and a partial fix, so you can choose.
- Install in 1–3 days — most residential French drains are same-day or two-day jobs.
- Test under hose before closing up the trench, so we know it flows.
Do I need a permit?
Usually no for residential French drains within your property boundary. Permits are required if:
- You’re discharging into the public right-of-way (street, sidewalk, city storm drain)
- The scope includes significant grading (more than 50 cubic yards moved)
- You’re tying into municipal drainage infrastructure
We check your city’s requirements before quoting.
Ready to fix it?
If your yard’s holding water after the rain, it’s worth fixing before the next storm season rather than after. Call (760) 314-1359 for a free walk-through, or request an estimate. Also see our irrigation & drainage service for the full scope of what we handle.
Published May 15, 2026