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Most of the projects I develop are on very challenging sites. I can invest in steep slope and Environmentally Critical Areas knowing that Cornerstone will be there to handle some of most complicated demolition and excavation sites in Seattle.

– Jon Riser

Past Projects Seattle

Cornerstone works on both commercial and residential excavation and sewer pipe line repair projects. Here are a few examples of projects we have done in the past.
Seattle Commercial and Residential Excavation