Basic
$13 – $33 per sq ft
Irregular natural cleft slate flagstones on compacted gravel and a sand bed, stone dust joints

Build a slate paving-stone patio on a prepared base (excavation, compacted gravel with sand or mortar bed, joints), per sq ft, materials and labor.
Install Slate Patio in Wilmington, Delaware typically costs $15 to $39 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Wilmington are 4.0% higher than the national average for install slate patio.
National average: $15 – $38 per sq ft
$13 – $33 per sq ft
Irregular natural cleft slate flagstones on compacted gravel and a sand bed, stone dust joints
$15 – $39 per sq ft
Pattern-cut slate in mixed rectangles on compacted gravel and sand, polymeric sand joints
$19 – $48 per sq ft
Gauged pattern-cut slate in mixed rectangles on a deep compacted base and sand bed, tight polymeric sand joints, sealed
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $6.55 – $17 | sq ft |
| Labor | labor | $5.83 – $15 | sq ft |
| Supplies & Other | supplies | $1.75 – $4.42 | sq ft |
| Equipment & Disposal | equipment | $1.16 – $2.95 | sq ft |
Labor costs in Wilmington run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local install slate patio contractors in Wilmington for personalized quotes based on your specific project.