How Much Does Install Slate Patio Cost in Washington, District of Columbia?

What you get at each price level

• Basic

  $13 – $34 per sq ft

  Irregular natural cleft slate flagstones on compacted gravel and a sand bed, stone dust joints

• Standard

  $16 – $40 per sq ft

  Pattern-cut slate in mixed rectangles on compacted gravel and sand, polymeric sand joints

• Premium

  $20 – $50 per sq ft

  Gauged pattern-cut slate in mixed rectangles on a deep compacted base and sand bed, tight polymeric sand joints, sealed