Concrete Slab Cost in Washington DC 2026
Concrete Slab in Washington DC costs between $3,065 and $13,624 in 2026, with the average around $6,812. Washington DC pricing runs 70% above the US national average. Pouring of a concrete slab for a shed, garage, or addition with excavation, a gravel base, vapor barrier, wire mesh, and a finished surface. Includes forms and curing.
What concrete slab includes in Washington DC
Pouring of a concrete slab for a shed, garage, or addition with excavation, a gravel base, vapor barrier, wire mesh, and a finished surface. Includes forms and curing.
Typical time on site: 1 to 3 days. Local labor rate: $41/hour for an experienced concrete pro.
What changes the price of concrete slab in Washington DC
- Slab square footage
- Slab thickness
- Vapor barrier and mesh
- Excavation and base
- Site access and grading
A concrete slab quote priced off statewide averages will be off by 10 to 20 percent for Washington DC, because the metro has its own labor pool, material delivery distances, and permit timelines.
Washington DC climate and demand for concrete
Humid subtropical; freeze-thaw cycles; historic preservation drives material choices
Washington DC permits for concrete slab
Building department: DC Department of Buildings (DOB). https://dob.dc.gov
Typical permit cost: $400 - $4,500 residential. Inspection time: 10-25 business days. Washington DC rule: DC DOB and DCRA have strict historic preservation review (HPRB). License + basic business license required. DC has no state taxes but has its own sales tax (6%).
District of Columbia sales tax and licensing for Concrete
District of Columbia sales tax: 6% (no local addition). Real property labor not taxable; TPP repair labor is taxable.
State license: DC Department of Consumer and Regulatory Affairs, required: $390 (basic business license).
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