Keystone ConstructionHome ImprovementBuilders/Contractors Keystone Visit Website 152 W WATERLOO ST CANAL WINCHESTER, OH 43110 6143214447 6143214447 About Map About Residential Construction, Remodels, Property Maintenance and HVAC. Licensed General Contractor in all Mechanicals serving Canal Winchester and Central Ohio. What's Nearby? Distance: 5 10 15 20 25 50 mi.