Grading, downpipes and where the water is coming from.
Quick answer: Yard and Site Drainage. Southeastern Renovation is a licensed South Carolina general contractor (CLG.127339) serving the Charleston Lowcountry, SC. Work is coordinated by Southeastern Renovation as the general contractor. Licensed trade subcontractors handle work requiring their trade credentials; permit responsibilities depend on the project scope and jurisdiction. Call (843) 718-8177 for an estimate.
Downpipes discharging at the foundation are the single most common cause, and the fix is extending them somewhere useful rather than digging anything. It is worth eliminating before spending on a system.
Grading is the next thing. Ground should fall away from the house, and over years mulch, planting beds and settlement quietly reverse that. A bed built up against a wall is a very effective way of directing water at it.
Where a genuine system is needed, the design starts from where the water arrives and where it can legally go — discharging onto a neighbour is a dispute rather than a solution.
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Often not. Downpipes discharging at the foundation and ground that has stopped falling away from the house cause most of it, and both are cheaper to correct than to drain around.
Those get eliminated first.
No, and it is worth knowing before a system is designed around it. Where the water can legally go is part of the design, not a detail to settle afterwards.
Usually grade and roof area. A larger roof, downpipes pointed the wrong way, or a bed built up against the wall will each do it, and they compound.