Gallery of
Our Work
Discover our before and after Second Storey Addition Projects that will inspire your own home improvement project.
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Second Storey
Additions
At Keystone, we eliminate the problem of losing precious yard space by designing and building practical and stylish second storey additions
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All About
our Process
Refined over 20 years, the Keystone process is focused on you and building an upper level extension that brings light and space into your home.
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