Foundation Repair in Arlington, VA
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Foundation problems in Arlington
Arlington has a large stock of homes built between the 1920s and the 1950s: bungalows, Cape Cods, colonials and brick ramblers, most with basements. Many basement walls are block or older poured concrete without modern drainage. Decades of wet soil pushing against them show up as horizontal cracks, bowing, leaks at the wall-floor joint and settling at corners.
Parts of Northern Virginia, including areas mapped by Fairfax County and the City of Alexandria, contain so-called marine clay: high shrink-swell clays of the Potomac Formation that can move foundations as they wet and dry. On sloped lots, those clays also add to slope movement.
Additions and tear-down rebuilds
Arlington homeowners often expand older houses. Additions sit on their own footings, and the joint between old and new is where cracks show up first. Infill rebuilds next to older homes can change drainage on neighboring lots. If cracks appear after work next door or after an addition, document them with dated photos. See attachments pulling away from the house.
Costs
| Figure | Published amount |
|---|---|
| Average job (This Old House, Arlington) | about $2,700 |
| Wall stabilization project (national guides) | $4,000 – $20,000 |
| Piers, per pier (national guides) | $1,000 – $3,000 |
These are published figures for orientation only, not quotes. Averages include many small jobs; multi-pier projects cost more. The contractor you are connected with sets the price after an inspection.
Permits and licensing
Arlington County requires a building permit for structural repairs, including foundation work; permits are handled by the county’s Inspection Services Division under the Virginia Uniform Statewide Building Code. Virginia requires a contractor license from DPOR for jobs over $1,000. Ask for the license number and the permit before work starts.
Water and walls together
Most Arlington wall problems are driven by water. Extend downspouts, fix grading, and ask the contractor whether interior drainage or a sump pump should be part of the plan alongside wall braces or anchors. See bowing basement walls and foundation drainage.
Sources
- Fairfax County GIS (data.gov): Previously mapped marine clay
- City of Alexandria: Geologic atlas (marine clay and Potomac Formation)
- This Old House: Foundation repair in Arlington, VA
- Bob Vila: Foundation repair cost (national price ranges)
- Fairfax County: Information for prospective contractors (DPOR licensing)
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21 ZIP codes in Arlington
22201, 22202, 22203, 22204, 22205, 22206, 22207, 22209, 22210, 22213, 22214, 22215, 22216, 22217, 22219, 22230, 22242, 22243, 22244, 22245, 22246
FAQ
Foundation Repair in Arlington
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How much does foundation repair cost in Arlington, VA?
This Old House lists an average of about $2,700. Wall stabilization projects commonly run $4,000–$20,000 according to national guides.
Is there marine clay in Arlington?
Marine clay, a high shrink-swell clay of the Potomac Formation, is mapped in parts of Northern Virginia, including Fairfax County and Alexandria. A contractor or engineer can check your lot.
Do I need a permit for foundation repair in Arlington County?
Structural repairs such as foundation work require a building permit from Arlington County’s Inspection Services Division.
Does a Virginia contractor need a license?
Yes, a DPOR contractor license is required for jobs over $1,000.
Foundation problems in Arlington?
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