Cost to French Drain Installation in San Francisco, CA (2026)
If you’re budgeting a french drain installation in San Francisco, most projects run $2,552-$12,759, 28% above the $5,500 national average. What moves that number most is usually one thing: Drain Length and Depth. On its own it can swing the cost by $10 - $100 per linear ft, so that’s the decision to slow down on before you sweat the smaller stuff.
Easiest place to save: Get three competitive bids and ask each contractor to break out materials, labor, and permit costs separately - this makes comparing apples-to-apples much easier and exposes inflated material markups
In the West Coast (where San Francisco sits): Bay Area and Seattle run 25-35% above average; LA 20-25% above; clay-heavy Pacific Northwest soils add complexity.
$2,552-$12,759 in San Francisco
28% above the national average · 1.28x cost multiplier
Expect to pay $2,552-$12,759 for a french drain installation in San Francisco, about 28% above the national benchmark. The West Coast region's contractor market and material costs account for most of this difference. The detailed breakdown below shows how budget, mid-range, and premium projects compare at San Francisco prices.
Cost Breakdown in San Francisco
| Line Item | Low | Mid | High |
|---|---|---|---|
| Cost per linear ft | $13 | $45 | $128 |
| Materials | $510 | $1,912 | $5,100 |
| Labor | $766 | $3,574 | $10,213 |
| Permits | $0 | $255 | $638 |
| Total | $1,276+28% vs. national avg | $5,741+28% vs. national avg | $17,226+28% vs. national avg |
Budget
Simple surface-level trench drain, 25 linear feet, basic gravel and perforated pipe, no outlet structure needed. Gravity daylight outlet to a low point in the yard.
Mid-Range
50 linear feet of deep perforated pipe system with gravel bed, landscape fabric sock, outlet to daylight or dry well, minor grading to ensure positive slope throughout.
Premium
200+ linear ft comprehensive drainage system with engineered design, multiple collection points, dry well or municipal storm drain tie-in, excavation through hardscape such as concrete or pavers.
Material Options
Material prices below are national averages; availability in San Francisco may shift costs slightly.
| Material | Cost/Unit | Best For |
|---|---|---|
| Perforated PVC Pipe with Gravel Bed | $5-$15 per linear ft (materials only) | Standard residential french drains, perimeter drainage, yard drainage in most soil typesProven, widely understood, easy to inspect and repair, gravel provides excellent void space for water movement |
| EZflow / Aggregate-Wrapped Pipe | $8-$18 per linear ft (materials only) | Projects where installation speed matters, tight access situations where moving gravel is difficultOne-piece system with pipe and aggregate combined, faster installation, lighter than gravel, consistent void ratio |
| Channel / Trench Drain (Surface) | $20-$45 per linear ft (materials only) | Driveways, patios, and hardscape areas where water pools on the surface rather than saturating the soilHandles large volume surface water quickly, grate is removable for cleaning, works in areas where sub-surface drain isn't possible |
| Curtain Drain (Interceptor Drain) | $15-$35 per linear ft (materials only) | Sloped properties where groundwater flows toward the house, hillside lots, properties with known uphill water sourcesIntercepts groundwater before it reaches the foundation, very effective for sloped lots with uphill water sources |
Other Projects in San Francisco
San Francisco Estimate
Typical Range
$2,552-$12,759
vs. National Average
28% above national
Cost Multiplier
1.28x
Cost Per linear ft
$13-$128
This 1.28x estimate prices San Francisco labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.
See national average costs →