If the yard slopes toward the house, every rain sends water to the foundation. This is one of the most important drainage problems to correct.
It's common on lots where the house sits lower than the yard, or where soil has settled next to the slab.
What you may be seeing
- Water flowing toward the house during rain
- Puddles along the foundation
- Soil higher than the slab in places
- Water entering the garage or doors
- Mud splash on the siding
First question: can the soil be regraded to slope away?
If there's room to slope the soil away from the house and send it to a path, regrading is often the cleanest fix. If the lot rises toward neighbors or a fence, water may need to be intercepted with a swale or drain.
If only the area near the house slopes in
Settled backfill or landscaping usually causes a short reverse slope.
Possible causes:
- Settled soil
- Beds built up above the slab
- Removed landscaping
If the whole yard rises away from the house
The house sits low and receives the yard's water.
Possible causes:
- Lot design
- Neighbor grade higher
- Fill added to the yard
If a recent project changed the slope
New patios, pools, additions or fill can reverse drainage.
Possible causes:
- Hardscape installation
- Pool spoils spread in the yard
- Neighbor construction
What you can check yourself
Only check these safely and after rain has stopped. Do not dig near marked utilities, and do not go near electrical equipment that is standing in water.
- Use a level and board to check the slope near the house
- Watch water direction during rain
- Make sure soil stays below the slab and weep holes
- Note any recent work on your lot or next door
Answer 20 quick questions → to get a preliminary drainage assessment.
What a drainage professional may evaluate
- Laser grade survey
- Swale and drain layout
- Outlet route planning
- Check local rules and HOA requirements
Most common causes
Settled soil
Backfill next to the slab settles over time.
Lot design
The house sits lower than the yard.
Landscaping and fill
Beds or added soil reverse the slope.
Construction changes
New hardscape or a neighbor's grading.
Possible solutions
The right fix depends on where the water comes from, where it collects and where it can legally and physically go. These are the solutions most often considered:
Regrading
Reshape soil to fall away from the house.
Swale
A shallow channel that intercepts and redirects water around the house.
French drain
An interceptor drain uphill of the house.
Catch basins
Collect surface water before it reaches the foundation.
When to call a drainage professional
- Water reaches the foundation every rain
- The lot rises toward the house
- Water enters the garage or house
- Regrading would affect neighbors or HOA rules
Frequently asked questions
How much should the yard slope away from the house?
A common rule of thumb is for soil to fall away noticeably for the first several feet. Your local building code and a professional can give exact guidance.
Can I regrade my yard myself?
Small areas next to the house, yes, with care to keep soil below the slab and weep holes. Larger regrading needs equipment and planning for where the water goes.
What is a swale?
A shallow, grass-lined channel that carries surface water around a house or along a property line to an outlet.
Bottom line
A yard that slopes toward the house sends water to the foundation. Fix the slope or intercept the water before it gets there.
This page is educational and does not replace an onsite evaluation. Conditions, codes and HOA rules vary by property.