Contractor profile
Cornerstone Construction
oshawa, whitby, ajax, pickering, bowmanville, port-perry, port-hope, clarington
Project fit
Home renovations including kitchens, bathrooms, basements and multiple-room projects.
Compare local options
Oshawa general contractorsWhitby general contractorsAjax general contractorsPickering general contractorsBowmanville general contractorsPort Perry general contractorsPort Hope general contractorsClarington general contractors
Review snapshots
5.0/5 · 1 reviewsHouzz · Review recency unavailable
4.6/5 · 22 reviewsGoogle via Ontario Home Renovations Directory · Review recency unavailable
Snapshots can differ by source, branch and collection date. Record checked 2026-11-08.
Credentials and checks
Independent credential and insurance checks unresolved. Company claims require confirmation.
Research status
Primary coverage and trade evidence checked; linked review snapshot recorded; credentials unresolved
Company service-area section explicitly names each listed community and Clarington. Project ratings shown by company are not independent aggregate reviews.