How We Work
You’ve Heard the Horror Stories. This Isn’t One.
The job that drags on for months. The budget that creeps. Dust in every room and a crew you can’t get on the phone. That’s what most people picture when they hear “renovation.” Not here — and we put that in writing.
A Managed Build From Day One to Handover
Every one of those nightmares traces back to the same root cause: a contractor figuring it out as they go. We don’t. Every Cornerstone project runs the same four phases — planned backward from your finish date before a single tool touches your home. Here’s exactly what happens, and when.
The Plan Is Finished
Before Demo Day.
Every phase mapped, every trade booked, every material ordered before a tool comes in. The surprises get solved on paper — not in your living room.
Discovery & Design
The on-site visit, the right questions, 3D renderings, and a fixed-price proposal built around your real goals.
Learn MorePre-Construction
Permits, scheduling, material selections, and a locked scope — so the build starts with zero surprises.
Learn MoreConstruction
Site protection, on-site rules, the Cornerstone Site Binder, a daily reset, and your live project portal.
Learn MoreHandover
A zero-defect punch list, your final walkthrough, the Owner's Manual, and a 5-year warranty that starts day one.
Learn MoreYou Are Never in the Dark
Our signature is on every joint. You have access to everything from the first day to the last.
Communication Built On Transparency.
Real-time updates via your Real-Time Client Portal every evening
Direct line to Mike Brock — not a call centre
Open-wall inspections before drywall goes up
Response within 24 hours. Always.
"We are not the cheapest contractor in Oshawa, Whitby, or Ajax. We are the most disciplined. Cheap contractors cannot afford the HEPA scrubbers, the LOTO safety procedures, or the daily resets we mandate. We price our jobs to be done right — because the most expensive renovation is the one you have to do twice."— Mike Brock, Founder, Cornerstone Construction Wondering why our price is higher than other quotes? Read Why We Aren't the Cheapest →
Ready to See the Standard in Person?
Book your free project diagnostic. We will walk you through exactly how we protect your home before we touch it.
The Cornerstone Standard
Surgical Precision From Day Zero
Most contractors treat your home like a job site. We treat it like someone lives there — because someone does. Before demo starts, our full site protection protocol goes in. It stays until the last day.
Floor Armour
Before a single tool comes in, your floors are protected.
- ✓Guardia Pro on all hardwood, tile, and stone surfaces
- ✓HEPA vacuumed before protection goes down
- ✓Self-adhesive, breathable, and waterproof
- ✓Floors continue to cure underneath
Sealed Dust Containment
Your living space stays clean while we work.
- ✓Floor-to-ceiling polyethylene barriers at all transitions
- ✓Heavy-duty zipper doors for crew access
- ✓Tuck tape sealed at every seam
- ✓Smoke detector dust covers on every sensor
HVAC Protection
Your ductwork stays clean from day one.
- ✓MERV 5 filter pads on every supply and return vent
- ✓Installed before demo starts
- ✓Keeps silica, gypsum, and drywall dust out of your ductwork
Utility Safing-Off
Every line secured before demo begins.
- ✓Water lines capped with SharkBite Max brass fittings
- ✓Electrical circuits locked out using LOTO procedures
- ✓Every line tagged and labelled
- ✓Water restored to the rest of the home same day
Daily Reset
We take the last 30 minutes of every day to do the following:
- ✓All garbage removed to the bin
- ✓Tools, cords, and materials packed up and organised
- ✓Work zone HEPA vacuumed
- ✓Floor protection and barriers inspected and re-taped
- ✓Washroom cleaned twice a week
Negative Pressure Zone
On heavy demo and drywall days we run active air management.
- ✓HEPA air scrubber running continuously
- ✓Negative pressure maintained — air pulled out faster than it comes in
- ✓Dust physically cannot travel to the rest of your home
- ✓The same standard used in commercial construction and remediation
This is not an add-on. It is standard on every Cornerstone project regardless of scope or budget.
Our Promises to You
The Certainty Stack
Cornerstone Construction sets the standard for accountability in GTA renovations.
$300/Day On-Time Guarantee
If we miss our completion date due to our management, we pay you $300 per day. No excuses.
Learn more →Real-Time Client Portal
Stay informed 24/7. Your client portal provides real-time updates, daily logs, and photo progress so you never have to wonder about the status of your project.
Learn more →Price Lock Guarantee
Surprises are for birthdays, not construction. Once we sign a contract, your price is locked. We absorb any material cost fluctuations so your budget stays exactly where it started.
Learn more →5-Year Warranty
We stand behind our workmanship for five full years. If we built it, we own it.
Learn more →