Window Replacement in London, Ontario
Measured, quoted, and installed by a family-owned London crew, for homes from Old North century houses to new builds in Hyde Park.
Most London homes we see fall into one of three situations: original wood windows on a pre-war house, aluminum or early vinyl sliders on a 1960s–80s house, or builder-grade vinyl on a newer home that's starting to fog and drag. Each calls for a different approach, and we'll tell you which one fits after looking at your frames, not before.
Choosing the right windows for a London home
Style
Casement and awning windows seal by compression, which makes them the tightest choice on the west and north walls that take London's winter wind. Sliders cost less and suit basements and secondary rooms. Hung windows are the right look on older brick homes. Most houses end up with a mix. Our casement vs. slider vs. hung guide goes room by room.
Glass
Look for ENERGY STAR certified windows: in Canada that means an Energy Rating of 34 or higher, or a U-factor of 1.22 W/m²·K or lower. Triple-pane glass is worth it on north and west walls and in bedrooms; double-pane Low-E with argon is fine for most south-facing glass. See double vs. triple-pane.
Frame material
Vinyl is the value choice for most London homes. Fibreglass costs more but handles black and dark frames on sunny walls better and lasts longer. Wood or wood-clad windows are usually expected on street-facing elevations in heritage districts. Compare them in vinyl vs. fibreglass windows.
Retrofit or full-frame?
If your existing frames are solid, square, and dry, a retrofit insert is faster and costs less. If sills are soft, frames are out of square, or the original installation was never flashed, which is common on London homes from the 1960s to the 1980s, a full-frame (brick-to-brick) replacement is the one that actually fixes the problem. We check every opening and quote each one the way it should be done. Details in retrofit vs. full-frame replacement.
Bay, bow, and specialty windows
We replace existing bay and bow windows and build new projections, with the support, roof, and insulated seat that keep them from sagging or frosting. We also handle window enlargements, new openings, and stone sills. Read the bay and bow window guide before you decide.
Heritage districts and permits in London
London has several heritage conservation districts, including Wortley Village–Old South, East and West Woodfield, Bishop Hellmuth, Blackfriars/Petersville, Old East, and Downtown. In these areas, replacing street-facing windows generally needs a Heritage Alteration Permit, while storm windows and rear elevations have more freedom. Outside heritage districts, a same-size replacement normally needs no building permit, but an enlarged opening or new egress window does.
Rebates
Ontario's Home Renovation Savings Program pays $100 per rough opening for ENERGY STAR certified windows installed as part of a bundle with a home energy assessment. Book the assessment before the work starts. Our 2026 rebate guide has the steps.
“Waldek and his crew was very professional, punctual, clean and efficient. They did fabulous job in a time frame that was estimated and within the predicted cost. I am recommending Wide View Contracting to anybody that needs windows and door replacement.”
Window replacement questions
How much does window replacement cost in London, Ontario?
Published 2026 Ontario guides put a standard-size vinyl replacement window at roughly $500 to $1,200 installed, and a 12 to 16 window home at about $8,000 to $20,000. Casements, triple-pane glass, custom shapes, bay and bow units, and full-frame installation sit at the higher end. We give you a written, itemized quote after measuring.
Should I replace all my windows at once?
Not necessarily. Doing a full elevation or the whole house at once lowers the per-window cost and gives a consistent look, but many London homeowners start with the windows that have failed or the walls that take the most weather, then do the rest later.
Can you install windows in the winter?
Yes. Windows are replaced one opening at a time, so each one is only open for a short period, and the sealants and foams used are rated for cold-weather application. Winter is often the easiest time to get on the schedule.
Do you install basement egress windows in London?
Yes. A finished basement bedroom needs a window with at least 0.35 m² of clear opening and no dimension under 380 mm under the Ontario Building Code. Cutting a new opening or enlarging one in a foundation wall needs a City of London building permit.
Helpful guides
- How Much Do Replacement Windows Cost in Ontario in 2026?
- Signs It’s Time to Replace Your Windows
- How to Read a Window Quote: Line Items That Reveal a Good or Bad Contractor
- Window Installation Checklist: What to Inspect Before the Crew Leaves
- Basement Egress Windows in Ontario: Code Requirements, Sizes, and Cost
Also in London: door installation · siding replacement · all window services
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Call London 519-630-3820 or request a quote online. The consultation is free and happens at your home.
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