Cuanto Cuesta French Drain Installation en Gilroy, CA? (2026)

Costo Promedio

$14,841–$29,889

Materiales

$10,920–$22,505

Mano de Obra (South Bay)

$953–$1,406

Las tarifas de mano de obra en South Bay son +25% comparadas con la linea base de Sacramento Metro.

A French drain installation includes trenching a sloped channel, lining it with filter fabric, laying perforated pipe on a gravel bed, backfilling with clean drain rock, and restoring the surface. French drains redirect subsurface water away from foundations, patios, and low-lying yard areas. This estimate reflects Sacramento-area pricing for 2025-2026.

Gilroy se encuentra en el condado de Santa Clara (South Bay). Garlic Capital of the World with affordable suburban developments south of San Jose. El proveedor local de energia es PG&E.

Calculadora de Costos

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Ciudad

Linear feet of drain

Materiales Incluidos

Perforated corrugated pipe (4")2500 linear ft

$2,500–$6,250

Clean drain rock (3/4")200 cu yd

$7,000–$12,000

Non-woven filter fabric2750 linear ft

$1,375–$4,125

Catch basin / pop-up emitter2 each

$30–$90

Pipe fittings, couplings, elbows1 lot

$15–$40

Mano de Obra(South Bay +25%)

Drainage installer10h @ $63–$94/hr

$625–$938

Laborer / trenching7.5h @ $44–$63/hr

$328–$469

Margen del Contratista25%

0%Promedio 30%100%

Materiales

$10,920–$22,505

Mano de Obra

$953–$1,406

Margen

$2,968–$5,978

Costo Total Estimado

$14,841 – $29,889

$297–$598 por unidad

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Llamar (916) 476-7689 Cotizacion Gratis

Cronograma del Proyecto

Drainage assessment & layout

30-60 minutes

Evaluate water flow patterns, identify problem areas, and mark the drain path with proper slope (1% minimum grade).

Trenching

2-5 hours

Excavate a trench 12-18 inches wide and 18-24 inches deep along the planned route, maintaining consistent downhill slope.

Pipe & gravel installation

2-4 hours

Line the trench with filter fabric, add a 2-inch gravel bed, lay perforated pipe (holes down), and fill with drain rock to within 4 inches of grade.

Surface restoration & testing

1-2 hours

Fold filter fabric over the gravel, backfill with topsoil, restore sod or landscape, install pop-up emitters, and test the system with water.

Desglose de Materiales

Material	Cantidad	Unidad	Costo Unitario	Total
Perforated corrugated pipe (4")	2500	linear ft	$1–$2.5	$2,500–$6,250
Clean drain rock (3/4")	200	cu yd	$35–$60	$7,000–$12,000
Non-woven filter fabric	2750	linear ft	$0.5–$1.5	$1,375–$4,125
Catch basin / pop-up emitter	2	each	$15–$45	$30–$90
Pipe fittings, couplings, elbows	1	lot	$15–$40	$15–$40

French Drain Installation en Gilroy — Preguntas Frecuentes

How deep should a French drain be?+

Most residential French drains are 18-24 inches deep. For foundation drainage, the trench bottom should be at or below the footing level. Deeper drains intercept more groundwater but cost more to install.

Will a French drain solve my yard flooding?+

French drains are effective for subsurface water and slow-draining soils. For surface water runoff, you may also need a surface drain or channel drain. A drainage assessment will determine the best solution.

How long does a French drain last?+

With proper filter fabric and clean drain rock, a French drain lasts 20-30+ years. Fabric prevents silt from clogging the gravel and pipe, which is the main cause of premature failure.

Can I install a French drain myself?+

Small, shallow French drains are a feasible DIY project. However, drains near foundations, under hardscape, or requiring utility locates are best handled by a professional to avoid damage and ensure proper slope.