The short version for Central Florida lots
Use a French drain when water is soaking down and getting trapped under the surface, usually a low spot or against the foundation. Use regrading when water is running across the yard and has nowhere to go because the lot is too flat.
Many flat Oviedo and Seminole County lots end up needing a little of both, but the starting point is reading where the water actually sits.
- Water pooling in a low spot away from the house tends to be a French drain job
- Water running across the lawn toward a corner or fence tends to be a grading job
- Water seeping against the foundation is almost always drainage, not grading
What a French drain actually does
A French drain is a buried trench lined with fabric and rock, with a perforated pipe inside. It catches water that has soaked down and carries it sideways to an outlet. It is the right tool when the problem is a soggy low spot or water pressing on your foundation.
It works under the surface, so it is the fix for a lawn that stays spongy rather than wet on top.
What regrading does instead
Regrading reshapes the surface so rain runs off instead of settling. A contractor cuts and fills shallow areas to create a pitch heading away from the house and toward a swale or outlet. It is the fix when the lot is simply too flat for water to move.
Regrading is not a substitute for drainage. If the water is coming from under the surface, a new grade will still have a wet spot where the water seeps back up.
How to know which one your yard needs
Stand in the wet area after a dry spell and watch where the water comes from. If it seeps up from the ground, you have a water-table or hardpan problem and a French drain is the honest fix. If it runs in from higher ground and stops because the yard is flat, grading is the fix.
A drainage contractor confirms this by walking the lot and finding where the water can leave the property. That single answer decides the job and the cost.