French Drains and Drainage Excavation in Sacramento
Excavation for French drains, swales, downspout lines and catch basins that move water away from structures and low spots.
Standing water, soggy lawns, wet crawlspaces and water pooling against a foundation are all drainage problems, and most of them are solved by moving water on purpose instead of letting it find its own path. This service covers the excavation side: French drains, swales, catch basins and the trenching that connects them to a proper outlet.
When you need drainage work
Common signs include water that sits in the yard for days after rain, damp or musty crawlspaces, soil washing out near foundations or retaining walls, downspouts that dump next to the house, and slopes that send runoff toward a building. New construction also needs drainage planned from the start, so water leaves the finished pad cleanly.
How a typical job runs
- Site walk. We look at the slopes, downspouts, structures and the wet areas, and ask when the problem happens. Seeing a site after rain is ideal, but not always possible.
- Find the water source and the outlet. Before we price a route, we work out where the water comes from and where it can legally and practically go. A drain with no outlet is just a buried pond.
- Utility locate. California law requires contacting USA North 811 before digging, at least two working days ahead. See call 811 before you dig in California.
- Layout and slope. The route is marked with a continuous fall toward the outlet.
- Trench and install. The trench is dug, lined with fabric, and set with perforated pipe and drain rock or other agreed material. See rock and gravel placement.
- Backfill and cleanup. The surface is restored as agreed, and spoil is placed or hauled off.
For help planning the layout before you call, read how to plan a French drain.
Local conditions that matter
Clay-rich soils are common across the Sacramento Valley. They absorb water slowly, hold it near the surface and expand as they get wet, so many drainage problems here come from water that simply has nowhere to soak in. Our guide to clay soil drainage problems in Sacramento goes into more detail.
Low-lying areas near the rivers and the Delta side, including parts of West Sacramento, Natomas, Yolo and south county, can have shallow seasonal groundwater, which can limit what a gravity drain can do. In the foothills, slopes, rock and erosion are more of a concern than soil that holds water. In established neighborhoods, mature trees and older underground lines can shape the route. Levee-protected areas and FEMA flood zones may carry floodplain rules that affect grading and discharge.
The wet season, roughly November to April, is when drainage problems show themselves, and also when digging gets harder. Both are worth planning around. Permit and discharge requirements vary by city and county, so confirm with your jurisdiction.
What to have ready for an estimate
- Where the water collects and when it happens
- Photos of the problem area, especially after rain
- Locations of downspouts, structures, septic, well and irrigation
- Any site plan or survey
- Whether there is an obvious low place or outlet on the property
This is typical scope. The final services and scope are confirmed per job in your written estimate. Contact us to request one.
Typical scope
- French drain trenching with perforated pipe and drain rock
- Downspout and roof drain connections
- Surface drains and catch basins
- Swales and regrading to redirect surface water
- Discharge routing to an approved outlet
- Backfill, spoil handling and cleanup
What affects the job
- Clay-rich soils drain slowly and often hold water near foundations
- Water needs somewhere legal and safe to go, which may limit options on small or flat lots
- Shallow seasonal groundwater in low-lying areas can overwhelm a drain that depends on gravity alone
- Wet-season (roughly Nov to Apr) timing helps show where water actually collects
- Mature tree roots and existing utilities can force the drain route to change
Questions about drainage and french drains
What is a French drain?
A French drain is a trench with perforated pipe set in drain rock, wrapped in fabric, that collects water and carries it to an outlet. It is used to intercept groundwater or surface water. It only works if the pipe slopes continuously to a place where the water can leave, so the outlet is the first thing to settle.
Will a French drain fix my wet yard?
Sometimes. It depends on where the water comes from. Roof runoff, a sloped lot, high groundwater and compacted clay each call for different fixes, and a drain alone may not be enough. We look at the site, ideally after rain, and tell you what we think is causing the problem.
Where does the water go?
It needs an outlet such as a daylight discharge, a storm system connection, a dry well or a lower part of your property, and the right choice depends on the lot and local rules. You generally cannot send water onto a neighbor's land or into a sanitary sewer. Confirm discharge rules with your city or county.
Can you install a drain around the house?
Yes, perimeter drains are a common request. They involve digging next to the foundation, so depth, existing utilities and waterproofing need attention. Tell us about any foundation issues or interior moisture, and we will discuss scope at the site walk.
Tell us about the job. Get a written estimate.
Send the address, what you need done, and your timeline. We will reply with next steps.