Window Replacement in Whitby, ON
Oshawa Prestige Windows & Doors handles window replacement in Whitby, ON the way we'd want it done on our own house. That covers it all. Casement windows that crank open, awning windows over the sink, sliders, double hung windows, big picture windows and bay windows, plus new entry doors and patio doors. In plain terms, we fit whatever the opening needs. Before anyone talks price, our estimator walks the house with a tape and checks every frame.
We're 8 km away in Oshawa, so Whitby is a short drive for our crews, most weeks of the year. Every install carries our 5-year installation warranty on top of the maker's warranty. We do about 1,100 openings a year across Durham Region, and plenty of them are here. Heading north? We also cover Brooklin. And if you're curious how a crank-out window goes in, read about our casement windows first.
$5M liability and WSIB
Insured crews on every job
Whitby Homes by Decade and the Windows They Need
We read a Whitby house by its decade before we look at a single window. Settlement goes back to 1800, the town was incorporated in 1855, and since the mid-1990s the subdivisions have kept marching north toward Brooklin. One street can hold three different window problems. Sometimes four.
Downtown and Werden's Plan: Older Brick Homes
Near the old four corners at Brock and Dundas, a lot of houses are brick with deep openings. The wood frames rot from the bottom up and the brickmould works loose, so a full-frame replacement is usually right here. Houses built before 1960 often have lead in the old trim paint, and we treat that trim carefully. The sill decides.
South and Central Whitby: 1950s to 1970s Bungalows
These bungalows and side-splits often still have aluminum sliders, or the first vinyl from the 1980s. If the wood under the old frame is solid, a retrofit installation saves you money and keeps your inside trim. Our estimator puts a moisture meter on every wood sill before choosing. Soft wood means the whole frame comes out. No capping over it.
North Whitby Subdivisions: 1990s Builder Windows
The north end's 1990s and 2000s houses are now 25 to 30 years old. We've seen the same thing on street after street: builder-grade sliders that fog up between the panes once the seal gives out. A fogged unit is a thermos that lost its vacuum. It still holds the coffee, it just doesn't keep it hot. Casement and awning windows seal tighter and open easier. Cold glass tells you.
Lake Wind, Highway 401 and Highway 412
Whitby runs right down to Lake Ontario, and the wind off the water drives rain sideways into south and east walls. That's where leaks start, so on those walls we fuss over the flashing and the caulking line. Honestly, triple-pane glass earns its money on the windiest side of the house. On a sheltered wall, it's often not worth the extra.
Highway 401 crosses the south end with interchanges at Brock Street and Thickson Road. Highway 412 heads north to the 407 near the Ajax line. Bedroom by the traffic? In our experience, laminated glass cuts road noise more than adding a third pane does. Quieter nights, same frame.
Do I need a permit to replace windows in Whitby?
Usually not. Replacing a window or door with one of the same size on a house normally doesn't need a building permit in Durham Region. A permit is needed if the opening gets bigger or a new one is cut. Homes in a heritage district also need a heritage permit first.
Whitby has two Heritage Conservation Districts: Werden's Plan, about 250 properties, and Brooklin, with 169. Inside either one, the Town wants a heritage permit before exterior work, and it was free to apply at the time of writing. Heritage staff care about window style, grilles and trim. We bring the product drawings. Meetings go faster.
What a Whitby Window Job Usually Looks Like
| Home type | Openings | Install method | Time on site |
|---|---|---|---|
| 1950s to 1970s bungalow | 8 to 12 | Retrofit or full-frame, decided sill by sill | 1 to 2 days |
| 1990s two-storey, north Whitby | 14 to 18 | Mostly retrofit | 1 to 2 days |
| Older brick home near downtown | 10 to 15 | Mostly full-frame | 2 days |
| Front door with sidelites | 1 door system | Full-frame | 1 day |
A typical 10-opening house is done in one day by a two-person crew, and full-frame jobs take one to two days. From order to install, plan on 6 to 10 weeks for most custom vinyl. Every opening gets measured twice: once for the quote and a check measure before anything is ordered. That's most of the job.
Windows and Doors We Install in Whitby
These are the windows and doors Whitby homeowners ask us about most, roughly in order. Doors too.
Casement Windows
A casement window is hinged on the side and cranks out. It closes hard against its seals, so it stops drafts better than any slider. It's the window we fit most often in north Whitby's 1990s homes, usually replacing a fogged slider.
Awning Windows
An awning window hinges at the top and tilts out at the bottom, so you can leave it open in light rain. It works well above a kitchen sink or paired under a large fixed pane in a living room.
Double Hung Windows
Both halves of a double hung window slide up and down, and they tilt in for cleaning from inside. They suit older brick homes downtown, where the original windows were often sash windows.
Picture Windows
A picture window doesn't open, so it seals best and lets in the most light. Many 1960s bungalows in central Whitby have one big living room window that is ready for new glass.
Entry Doors
We replace front doors in steel and fibreglass, with sidelites or a transom if you want more light. A new door with good weatherstripping stops the draft along the floor that old doors are known for.
Sliding Patio Doors
A new sliding patio door glides on fresh rollers, locks properly and keeps winter out of the family room. We size it to the opening, or cut the opening wider with a permit if you want more glass.
Window Replacement in Whitby: FAQ
How much does window replacement cost in Whitby?
A standard vinyl casement window usually costs $500 to $1,000 supplied and installed, according to published 2026 Ontario price guides. Full-frame work, special colours and triple-pane glass add to that. Bay windows run $3,000 to $5,000. We give you a written price after measuring every opening.
How long does a window install take in a Whitby home?
A typical 10-opening house takes one day with a two-person crew. Full-frame jobs, where the whole old frame comes out, take one to two days. Each window is out of the wall for well under an hour, so the house never sits open for long.
Can you replace windows in Whitby in the winter?
Yes, we install all year. In January we open one window at a time, seal it the same day and keep that room shut off from the rest of the house. The low-expansion foam and sealants we use are rated for the cold. Honestly? A winter install seals just as well as a July one.
Is there a rebate for new windows in Whitby?
Ontario's Home Renovation Savings Program has offered $100 for each window or door opening. The new unit has to be ENERGY STAR certified, and a home energy assessment comes first. Rules and end dates change, so check the program before you sign. We can tell you which of our windows are ENERGY STAR certified.
Do you install basement egress windows in Whitby?
Ask us about your basement when we visit. A basement bedroom window has to give at least 0.35 square metres of open space, with no side under 380 mm, under the Ontario Building Code. Making an opening bigger needs a building permit, which we confirm before quoting.
Do heritage homes in Whitby need special windows?
Homes in the Werden's Plan or Brooklin heritage districts need a heritage permit before exterior work. The Town looks at the window style, the grille pattern and the trim. Double hung windows with simulated divided lites often match the original look while still sealing like a modern window.
Book a Free Measure for Your Windows and Doors
Tell us how many openings and roughly how old the house is. We book a free in-home measure and give you a written quote.
Or call (289) 274-1333