French drain / drain tile Cost in Alexandria, Virginia
A gravel-filled trench with a perforated pipe collects groundwater and channels it away from the foundation, installed either in the exterior yard/perimeter or along the interior basement footing beneath the slab.
In Alexandria, the expansive shrink-swell clays common around here hold water against the foundation, which a French drain redirects. Local labor rates, your home's age, and site access then set where in the french drain / drain tile range your job lands.
Typical figures from local cost data, not a quote. Estimate your specific job →
Interior (under-slab) French drains cost more per foot than exterior (yard) drains, because installing them means cutting and re-pouring the basement slab and tying into a sump pump; an exterior yard trench is simpler. A full exterior excavation down to the footing is priced separately, as exterior waterproofing.
When french drain / drain tile is used
Used to relieve hydrostatic pressure and redirect water where a yard, foundation, or basement repeatedly collects water; interior perimeter drain tile costs more due to concrete cutting and sump-pump integration.
Lifespan: A properly installed French drain can function for roughly 30 or more years, though periodic flushing and debris removal are needed to prevent clogging.
Why costs differ in Alexandria
Soil & geology
Alexandria lies entirely within the Atlantic Coastal Plain, underlain by the Cretaceous Potomac Formation, a river-deposited sequence of interbedded sand and clay. The clay-rich beds can be expansive and prone to slope instability, while water-bearing sand lenses create locally high water tables; the city's geologic atlas maps expansive-soil and slope-stability susceptibility across town.
Permits
Foundation and structural repairs require a building permit from the City of Alexandria Department of Code Administration. Under the FY2026 fee schedule (effective July 1, 2025), residential alterations and repairs are charged at $18.00 per $1,000 of construction cost (or $0.30 per square foot), whichever is greater, with a $95 minimum, about $180-$360 on a $10,000-$20,000 job before add-on levies.
Local labor
Construction labor here runs 5% below the national average (RSMeans index 0.954), which is applied to every estimate on this page.
Housing stock
The median Alexandria home is about 52 years old, in City of Alexandria. Older homes carry more unknowns behind a foundation repair.
Frequently asked questions
How much does french drain / drain tile cost in Alexandria?
In Alexandria, french drain / drain tile runs about $38–$95 per linear ft for interior, or roughly $3,800–$9,550 for a typical job. Exact cost depends on the extent of the work. Use the calculator for an estimate specific to your home.
When is french drain / drain tile the right fix?
Used to relieve hydrostatic pressure and redirect water where a yard, foundation, or basement repeatedly collects water; interior perimeter drain tile costs more due to concrete cutting and sump-pump integration.
How long does french drain / drain tile last?
A properly installed French drain can function for roughly 30 or more years, though periodic flushing and debris removal are needed to prevent clogging.
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