Built on plans. Priced in writing.
Kitchens, bathrooms, basements, and additions across Toronto & the GTA — measured, drawn, and quoted as one fixed number before demo day. No allowances games. No mystery invoices.
Services & from-pricing
Pick the project. See the rate.
Every rate below is a real per-square-foot starting rate. Your site visit turns it into one fixed quote — drawings, scope, and price in writing. Tap a service for the full spec sheet.
Transformation · Drag the line
Gutted in week 1. Cooking in week 8.
A Scarborough kitchen, shot from the same doorway — studs, wiring, and subfloor on the left; quartz, shaker cabinetry, and dinner on the right. Drag the handle to compare.
Gutted — Week 1Finished — Week 8
Why Cornerstone
Run like a job site. Not a guessing game.
Fixed quote, in writing
After the site visit you get one fixed number — drawings, scope, and price signed before demo day. It doesn't creep.
How quoting works →
Licensed & insured
Licensed trades, full liability coverage, and WSIB on every crew member who steps on your property.
Meet the crew →
Our own crew
The people who quote your job are the people who build it. No day-labour roulette, no vanishing subcontractors.
Our story →
Clean-site promise
Dust barriers, floor protection, and a broom-clean site every single night — you live next to the work, not in it.
What clients say →
Our story
A Scarborough crew that shows its work
Cornerstone started with two carpenters, a pickup, and one rule we still quote by: measure it, draw it, price it once — in writing — and then build exactly what the drawing says.
Today our own crews frame, tile, and finish across Toronto and the GTA from our Scarborough yard. Every project gets a named project manager, a written schedule, and weekly photo updates, so you always know what happens next on your house.
2009
Est.
340+
Projects completed
10 yr
Workmanship warranty
Gallery
Recent builds across the GTA
Reviews
Homeowners who'd hire us again
Straight answers
Questions, answered
How accurate is the online ballpark estimator?
It is an honest ballpark built from our real per-square-foot rates — most projects land within about 15% of it. It is not a quote. Your fixed quote comes after a free site visit where we measure, check structure and systems, and price your exact scope in writing.
Do you handle permits and inspections?
Yes — drawings, permit applications, and every inspection booking are handled by us and included in your fixed quote for any project that needs them: additions, basements, structural work, decks over 24 inches, and more.
Can we live in the house during the renovation?
Usually, yes. We seal work zones with dust barriers, protect floors, and keep one bathroom and a basic kitchen setup running wherever the scope allows. For whole-home guts, we'll tell you honestly if a short move-out makes the project faster and cheaper.
What warranty do we get?
Workmanship is warranted for 10 years in writing on renovations and additions, 10 years on bathroom waterproofing, and 5 years on deck structures — plus manufacturer warranties on materials and fixtures we supply.
How do payments work?
Progress payments tied to finished milestones on the drawing set — never large deposits up front, and the final payment is only due after the walkthrough deficiency list is cleared.
Project-quote estimator
Ballpark it. Then we measure it.
Set your project type, size, and finish level for an instant ballpark — then book the free site visit that turns it into a fixed quote.
Estimator · Sheet E-01
Finish level
Ballpark — Kitchen Renovation · 200 sq ft · Standard
$60,000 – $81,000
Ballpark only — a site visit confirms the fixed quote. Most projects land within about 15% of this range; structural surprises are the main exception, and we flag those before you sign anything.