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Yard Drainage & Erosion Control in Sacramento, CA

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Yard drainage problems around Sacramento show up in the winter rainy season, when clay soils, hardpan layers, flat lots and downspouts near the foundation leave water with nowhere to go. Common fixes include extending downspouts, regrading, swales, French drains and breaking through hardpan in planting areas. On foothill slopes, covering bare soil and slowing runoff controls erosion.

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Drainage problems in Sacramento show up in winter. Most of the year's rain arrives between late fall and spring, often in multi-day storms, and on clay soil or over a hardpan layer it has nowhere to go. The same yard that is bone-dry in August can have standing water, a soggy lawn and water against the foundation in January.

Common causes around Sacramento

  • Clay and hardpan. Dense clay absorbs water slowly. Where a cemented hardpan layer sits below the surface, water perches above it, drowning roots and keeping lawns saturated.
  • Flat lots. Much of the valley floor is very flat, so small grading mistakes leave low spots with no natural outlet.
  • Downspouts. Roof water dumped next to the foundation is one of the most common sources of wet side yards.
  • Overwatering. Sprinklers running on a summer schedule into the rainy season keep soil saturated. Many problem yards are partly an irrigation problem.
  • Slopes in the foothills. In Folsom, Rocklin and parts of Roseville, sloped lots and decomposed granite can wash out during heavy rain.

Typical fixes

  1. Watch it rain. Walk the yard during a storm and note where water comes from and where it collects.
  2. Extend downspouts or connect them to a solid pipe that discharges to an approved outlet.
  3. Regrade so soil slopes away from the house and low spots drain.
  4. Add swales or a dry creek bed to move surface water across a flat yard.
  5. Install a French drain where water saturates the soil in one area.
  6. Break through hardpan in planting areas, or plant on raised mounds, so roots aren't sitting in perched water.
  7. Cover bare soil on slopes with mulch, plants and erosion control fabric.

Rain gardens and stormwater

A rain garden is a shallow planted basin that holds roof or yard water and lets it soak in. In clay or over hardpan it must be sized carefully and given an overflow, or it becomes a mud hole. Keep yard water out of streets and storm drains where you can, and don't direct it onto a neighbor's property; the City of Sacramento prohibits irrigation runoff onto sidewalks and gutters.

Permits and licensing

Drainage systems are on CSLB's list of landscaping projects that need a licensed contractor when the job is $1,000 or more or needs a permit. Large grading, work near creeks or levees, and connections to the public storm drain may need city or county approval. Check with your local public works or building department. Before trenching, contact USA North 811 at least two working days ahead so buried utilities are marked.

What drives the price

  • Length of drain line, trenching depth and soil or rock conditions.
  • Whether there is a usable outlet, or water must be carried far.
  • Grading, haul-off and restoring lawn or beds afterward.
  • Access for equipment in narrow side yards.

Learn more in our guide to watering rules and sprinkler schedules, since cutting overwatering often helps. Ready for help? Request a drainage company and include photos taken during or after a storm.

See how it works

How a French drain carries water away from a yard. Press the buttons to run each step and see what happens inside. Made with Colorfigures ·
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Frequently asked questions

What is hardpan and why does it matter?

Hardpan is a dense, cemented soil layer below the surface found in parts of the Sacramento Valley. Water and roots can't pass through it easily, so water perches above it, drowning roots and keeping lawns soggy. Breaking through it or planting on raised mounds helps.

Can overwatering cause drainage problems?

Yes. Sprinklers left on a summer schedule into fall and winter keep clay saturated. Adjusting the controller each season, and following your provider's winter schedule, often reduces soggy spots.

Do I need to call 811 before installing a French drain?

Yes. California requires notifying 811 before excavation. Contact USA North 811 at least two working days before you dig so buried utilities can be marked.

Sources and further reading

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