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Window & Door Specialists
Expert window and door replacement that transforms your home — sealed, secure, and stunning.
Instant Estimate
Use the calculator to build your estimate in seconds. Select the number of windows and sliding doors, add any upgrades, and see your ballpark price update live.
All final quotes are confirmed on-site and include labour, materials, and cleanup.
Adjust quantities and options below
Optional Upgrades
* Estimate only. Final price confirmed after on-site assessment.
What We Do
From a single window to a whole-home transformation, KO Carpentry delivers with precision and care.
Single-hung, double-hung, casement, bay, and picture windows. We remove the old and install the new with a clean, airtight finish that lasts decades.
Steel, fiberglass, and wood entry doors installed plumb and level every time. We handle the framing, weatherstripping, hardware, and finishing trim.
Smooth-gliding, properly sealed patio doors that bring light in and keep drafts out. French doors and sliding systems available in a range of styles.
Triple-pane glass, low-E coatings, and argon-filled units that cut your heating and cooling bills — and qualify for energy tax credits.
Add an extra layer of protection against harsh weather. Storm doors and windows installed over your existing units for year-round durability.
Why KO Carpentry
"We treat every home like it's our own — no shortcuts, no mess left behind."
Your home is protected at every step. We carry full liability insurance and all required trade licenses so you never have to worry.
We quote the job up front — no surprise add-ons, no hidden labour charges. What we quote is what you pay.
We respect your schedule. Most jobs are booked and completed within the same week, with minimal disruption to your household.
We stand behind everything we install. Our work is backed by a lifetime craftsmanship guarantee — not just the manufacturer's warranty.
How It Works
Four easy steps from first contact to finished installation.
We come to you, assess your windows and doors, and discuss your goals — no obligation, no pressure.
You receive a detailed written quote covering materials, labour, and timeline — all in plain language.
Our crew arrives on time, protects your home, and completes the installation to exacting standards.
We review every detail with you before we leave. No surprises, no mess — just a beautiful finished result.
Client Reviews
Over 500 happy homeowners — and counting.
KO Carpentry replaced all twelve windows in our colonial. The crew was professional, fast, and left the place spotless. Our heating bill dropped noticeably the very next month.
Homeowners, 2024
I got three quotes and KO was the most honest — no upselling, no nonsense. The front door they installed is beautiful and fits perfectly. I'll use them again without hesitation.
Homeowner, 2024
The sliding patio door they installed glides like silk. They finished in half a day and caulked everything immaculately. KO Carpentry genuinely takes pride in their work.
Homeowner, 2025
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