DURHAM REGION & GTA
Commercial Fit-Ups Done Right
Cornerstone Construction delivers professional commercial renovations for businesses across Durham Region and the GTA. On time, on budget, and built to last. Licensed, insured, and backed by our Certainty Stack.
WHAT WE BUILD
Commercial Services
From single office fit-ups to full commercial renovations — one team, one contract, everything handled.
Office Fit-Ups
Full office build-outs from shell to finished space. Demising walls, flooring, ceilings, electrical, data rough-in, and paint. We build offices people actually want to work in.
Retail Renovations
Storefront upgrades, interior reconfigurations, display builds, and full retail fit-outs. We understand retail timelines and work to minimise your downtime.
Restaurant & Kiosk Construction
Commercial kitchen rough-ins, dining room builds, kiosk construction, and food service fit-outs. Built to health code and ready for inspection.
Interior Fit-Ups
Tenant improvement work for landlords and property managers. We coordinate with building management and deliver clean professional finishes on schedule.
Landlord Work
Suite turnovers, common area upgrades, damage repairs, and building improvement projects. We keep your tenants happy and your building in top condition.
General Commercial Contracting
Have a commercial project that needs a single point of contact? We manage trades, timelines, and quality from start to finish.
OUR PROCESS
How We Work
Every commercial project follows the same four-step process. Clear. Accountable. On schedule.
WHY CORNERSTONE
Why Businesses Choose Cornerstone
We bring residential-grade attention to detail to every commercial project we touch.
COMMON QUESTIONS
Frequently Asked Questions
Everything you need to know about our commercial construction process, permits, and service options.
Commercial Fit-Ups
Done Right
Tell us about your project using the form. We review every submission personally and follow up within one business day with a direct call from Mike.