Rebuilt seat, roof and support
Bay & Bow Windows
Bay, bow and garden windows replaced with an insulated seat and new support, not just new glass.
- Bay and bow
- Garden windows
- Insulated seat board
Windows and doors for Durham Region homes
Oshawa Prestige Windows & Doors: Window Replacement & Installation, Entry and Patio Doors
Cold glass, drafts or a sash painted shut? We measure each opening twice, swap it full-frame or retrofit, and stand behind the install for five years.
Our window and door services
Tightest seal of any style
Casement Windows
Crank-out casement, awning and hopper windows that close tight against the lake wind.
- Casement and awning
- Hopper for basements
- Bedroom egress sizes
Frame, sill and lock, all new
Entry Doors
Fibreglass, steel and wood front doors with sidelites and multipoint locks, replaced frame and all.
- Fibreglass and steel
- Sidelites and transoms
- Multipoint locks
Glides with one finger again
Patio Doors
Sliding, garden and French patio doors with new sills, Low-E glass and locks that bolt in more than one spot.
- Sliding patio doors
- Garden and French doors
- Blinds between the glass
The window most Durham homes pick
Vinyl Windows
Paint-free vinyl replacement windows with double or triple pane glass, fitted full-frame or retrofit.
- Double or triple pane
- Full-frame or retrofit
- ENERGY STAR glass
Replacement Windows in Oshawa, Measured and Installed by Our Own Crews
Oshawa Prestige Windows & Doors replaces windows and doors in Oshawa houses of every decade: 1950s brick bungalows near the old north plant, 1970s side-splits, and the 1990s two-storeys whose builder sliders are fogging up right on schedule. We put in vinyl, fibreglass and wood-clad windows in every style that opens (and the ones that don't), and we can change a tired front door or patio slider on the same visit. Searched window replacement Oshawa because the bedroom glass is wet every morning? Fair enough. In plain terms, that is usually a failed seal or a leaky frame, and we figure out which one before anybody quotes you a number.
We've been in the window and door business for more than 35 years, and our own crews do every install. No subcontractors, which honestly sets us apart from a lot of window companies in Oshawa. Each job carries our 5-year installation warranty on top of the maker's warranty, plus $5 million in liability insurance and WSIB coverage. The measure is free and the quote is written down. We'd rather replace your four worst openings this year than talk you into all eighteen.
- Free in-home measure, written quote
- Full-frame or retrofit, your choice
- 5-year installation warranty
- Own crews, $5M liability and WSIB
- ENERGY STAR windows and doors
Residential Window Replacement in Oshawa: Every Style We Install
Twelve styles, two ways to put them in. Most Oshawa houses we measure end up with a mix: casements where you want air, a big fixed pane where you want the view. An opening, by the way, is just the hole in the wall the window sits in. We count those.
Casement Windows
Hinged on the side, it cranks out like a little door. When you close it, the sash pulls hard into the weatherstrip, which is why a casement window seals tighter than anything that slides. Standard vinyl casements run about $500 to $1,000 installed in Oshawa (Canadian Choice, 2026).
Awning Windows
Hinged at the top, an awning window swings out from the bottom, so a light rain runs off it while the air still comes in. We like them over kitchen counters and stacked under a big fixed pane. Expect prices close to a casement; the unit alone starts near $379 (Window Mart, 2026).
Double Hung Windows
Both halves slide, and both tilt in so you can wash the outside from your living room. On an older brick house or a century home downtown, a double hung window just looks right where a crank window wouldn't. Buy a good one with a solid lock. Cheap ones whistle.
Single Hung Windows
Only the bottom half moves. A single hung window is a little cheaper than a double hung, about $337 for the unit (Window Mart, 2026), and it's a sensible pick for bedrooms and back walls where you mostly want air low down.
Slider Windows
A slider moves left to right on a track; doubles slide both ways. Every 1990s subdivision in Durham seems to have a house full of them. They're easy to open but leak more air than a crank window, so we often swap a big one for a casement and a fixed pane side by side.
Picture Windows
It doesn't open, and that's the point. With no moving parts a picture window has the best energy rating of any style and the most glass. We usually flank one with casements or awnings so the room still gets air. Units start around $279 (Window Mart, 2026).
Bay Windows
A bay window pushes out past the wall: a fixed centre pane and a casement on each side, angled at 30 or 45 degrees. You gain a seat or a plant shelf and a lot of light. A standard vinyl bay runs about $3,000 to $5,000 (Canadian Choice, 2026).
Bow Windows
Four or more equal units in a soft curve. A bow window reads gentler than a bay and fills a wide living room wall nicely. We hang the projection on support cables and insulate under the seat board, because a cold seat is the first thing people complain about.
Vinyl Windows
The everyday choice in Ontario, and for most Durham houses the right one. Vinyl windows have hard uPVC frames (rigid vinyl) that never need paint. They also shrug off our freeze-thaw winters. Look for welded corners and a multi-chamber frame: in plain terms, the frame is honeycombed inside like a cooler wall.
Triple Pane Windows
A third layer of glass and a second sealed gap. It costs more and it's heavier, but cold and traffic noise drop off. If you ask us, triple pane earns its money on north and lake-facing walls and in bedrooms near Highway 401. On a sheltered south wall? Double is fine.
Basement Windows
Plenty of Oshawa basements still have single-pane aluminum sliders that frost over from December to March. We swap them for vinyl hoppers or sliders. A basement bedroom needs an egress window, at least 0.35 m² of open area with no side under 380 mm (Ontario Building Code 9.9.10.1).
Full-Frame & Retrofit Window Installation
A full-frame replacement takes everything out, back to the rough opening (the framed hole in the wall), so we can see the wood, fix rot and insulate properly. A retrofit installation leaves the old frame and slides the new window inside it: quicker, cheaper, less mess. A crown versus pulling the tooth. The sill decides.
How Much Does Window Replacement Cost in Oshawa?
Window replacement in Oshawa typically costs $500 to $1,400 per opening for standard vinyl casements and sliders, installed, and $3,000 to $5,000 or more for a bay or bow window. Full-frame installs, triple pane glass, custom colours and new capping add to the price. We give a written quote after measuring.
| Item | Typical price in Oshawa | Source |
|---|---|---|
| Vinyl casement or awning window | $500 to $1,000 installed | Canadian Choice, 2026 |
| Picture or fixed window, unit only | From $279 | Window Mart, 2026 |
| Slider or hung window | From about $700 installed | Clera, 2026 |
| Bay or bow window | $3,000 to $5,000 | Canadian Choice, 2026 |
| Sliding patio door | $2,000 to $6,000 | Canadian Choice, 2026 |
| Window installation, full range | $800 to $4,000 per window | Home Depot Oshawa |
| Home Renovation Savings Program rebate | $100 per ENERGY STAR window or door | Save on Energy, 2025 |
Costs People Forget to Ask About
- Full-frame vs retrofit: full-frame adds labour and new interior trim, often $150 to $400 per opening.
- Exterior capping and trim: new aluminum capping is usually priced per opening.
- Disposal: taking away the old windows should be in the quote.
- Permits: same-size replacement on a house needs no permit in Oshawa; a new or bigger opening does.
- Lead paint: homes built before 1960 may have lead paint on old trim, which changes how it is removed (Health Canada).
Those are published ranges, there so you can tell a fair quote from a silly one. We've seen the same 12-opening house quoted $9,000 apart, and the gap was nearly always install method and glass. Your number gets written down, opening by opening, after we measure.
Measured twice, installed once. Oshawa and all of Durham Region.
Door Replacement in Oshawa: Entry Doors and Patio Doors
Doors go in on the same visit, by the same crew, so there's one mess and one cleanup. These are the ones we swap most often around Oshawa.
Front Door Replacement
Replacing the whole system (slab, frame, sill and weatherstrip together) is what actually kills the draft. Swapping only the slab rarely does. Most front door replacement jobs we do in Oshawa are finished in a day. Styles and prices are on our entry door replacement page.
Fibreglass Entry Doors
A fibreglass entry door won't dent, rust or warp, and it can be stained to pass for oak or painted any colour you like. It also insulates better than wood. Good pick for a front door that faces the lake wind.
Steel Entry Doors
Steel doors have a foam core and cost less than fibreglass. Strong, secure, sensible. The weak spot is the bottom edge: once boots and shovels chip the paint, rust starts. We've replaced a lot of those.
Sliding Patio Doors
A sliding patio door has two panels, one fixed and one that slides. A new one with Low-E glass and a solid roller system replaces the drafty builder door that sticks every winter. Typical cost is $2,000 to $6,000 (Canadian Choice, 2026). More on our patio door replacement page.
Garden Doors and French Doors
A garden door is a hinged patio door with one or two swinging panels, sometimes called a French door. It opens the full width and seals tighter than a slider. It needs room inside to swing.
Sidelites and Transoms
Sidelites are the narrow glass panels beside a front door, and a transom is the glass above it. They bring light into a dark front hall. We use tempered or decorative glass so you get light without giving up privacy.
Window Repair, Glass Replacement and Specialty Services
Not every window needs to come out. We've fixed plenty that people were ready to throw away. Open a row for the smaller jobs.
Foggy Window Glass Replacement
A failed seal is a thermos that lost its vacuum: it still holds the coffee, it just stops keeping it hot. Moisture gets between the panes and fogs the glass. If the frame is sound, we swap only the sealed unit, which costs a fraction of a new window and takes about two weeks to order.
Window Repair and Hardware
Cranks that spin, locks that won't catch and sashes that drop are often fixable. Our service technicians carry hinges, operators and balances, and can find parts for windows made decades ago.
Window Seal and Weatherstripping
Worn weatherstripping lets air through even when the glass is fine. We replace the rubber seals on sashes and doors, and redo the exterior caulking between the frame and the brick.
Aluminum Window Capping and Trim
Aluminum capping is a metal skin over the outside trim so you never paint it again. We only cap over sound wood. Capping over soft wood is like painting over a water stain on the ceiling: it looks fixed until it isn't.
Custom Shape Windows
Arches, half-rounds and angled windows are made to measure. We template the opening and order a unit that fits it exactly, in vinyl or wood-clad.
New Window Openings
Want a window where there isn't one? Our crews can cut a new opening and frame it with a proper header. A new or bigger opening needs a building permit in Oshawa, and we help with the drawings.
Recent jobs
Window and Door Replacement Jobs Around Durham
Three jobs from this past year: the house, the openings, the days on site and the price range. We do about 1,100 openings a year, and these three are pretty typical. Real work beats adjectives.
"Most drafts I find in Oshawa homes aren't coming through the glass. They're coming in between the frame and the brick."
Our senior estimator
Full-Frame Casement Windows in a North Oshawa Bungalow
- 1950s brick bungalow
- 11 openings
- 2 days
- $12,000 to $14,000
Nine original wood windows, three of them with sills soft enough to push a screwdriver into. They came out full-frame and went back as vinyl casements with Low-E glass. The two frosty basement sliders became hoppers.
Retrofit Replacement Windows in a Brooklin Two-Storey
- 1990s two-storey
- 16 openings
- 2 days
- $18,000 to $22,000
Sixteen builder-grade sliders, four already fogged. The frames tested dry, so we did a retrofit and saved the owners about a day of labour, with casement and awning combos and triple pane on the windy north side.
Entry Door and Patio Door Replacement in Courtice
- 1970s side-split
- 2 doors
- 1 day
- $8,000 to $10,000
A dented steel front door, rusting along the bottom, came out. In went a fibreglass door with two sidelites. While the crew was there, a 6-foot patio slider that hadn't run straight in years got replaced too. One day, both doors.
How it works
How Oshawa Prestige Windows & Doors Replaces Your Windows
Start to finish, here's what a normal window job with us looks like. No surprises on install day.
Free in-home measure
We come to the house, measure every opening and put a moisture meter on the wood sills. Then we talk styles, glass and colour at the kitchen table.
Written quote
The price comes on paper, opening by opening, with full-frame or retrofit marked on each, so you can do the worst ones now and the rest next year.
Check measure and order
Before we order, we measure again. Custom windows can't be sent back. Most vinyl orders land in 6 to 10 weeks.
Installation day
A two-person crew does a typical 10-opening house in one day. Drop cloths go down first, and the old windows leave on our truck.
Walkthrough and photos
We open and lock every window with you, then send you the before and after photos of each opening. Keep them. They help if you ever sell.
$5M liability and WSIB
Insured crews on every job
Why homeowners pick us
Why We're the Window Replacement Company Oshawa Homeowners Call
Every Window Measured Twice Before It Is Ordered
Once for the quote, once again before ordering. A custom window that's 6 mm off can't go back to the factory, and a second measure saves weeks of waiting on a remake.
Full-Frame or Retrofit, Decided by the Sill
Every wood sill gets a moisture meter. Dry and solid gets a retrofit. Soft gets pulled full-frame. We won't hide rot under capping, even when it would make the quote cheaper.
35+ Years of Window Installation in Oshawa and Durham
More than 35 years on windows and doors, and about 1,100 openings a year across Durham Region. We've seen just about every builder window this area ever put in.
Our Own Installers, Insured and Covered by WSIB
The people on your lawn work for us, not a sub we met last week. Every job carries $5 million in liability insurance and WSIB coverage.
A 5-Year Installation Warranty on Every Window and Door
The maker covers the window; we cover the install for five years. After that, our technicians can still get parts for windows made decades ago.
Customer reviews
What Oshawa Homeowners Say About Their New Windows
Karen M.
September 2026Eleven windows in our 1950s bungalow. They pulled the old wood frames right out, found a rotten sill and fixed it, and vacuumed up every night. The back bedroom is finally warm.
Full-frame windows, north Oshawa Raj P.
August 2026Our front door was steel and rusted at the bottom. The new fibreglass door with sidelites looks great and the draft in the hall is gone. Installed in one day.
Entry door, Courtice Steve D.
July 2026Four of our sliders had gone foggy. The estimator showed us the frames were still solid and quoted a retrofit instead of pushing full-frame on every window. Fair price, tidy crew.
Retrofit windows, Brooklin Linda T.
June 2026Six weeks from order to install, which was what they said. One casement needed a hinge adjustment after a week and they came back the next day.
Casement windows, Whitby Daniel O.
May 2026We wanted a bay window in the living room. They measured twice, explained how the seat would be insulated, and it looks like it came with the house.
Bay window, Oshawa Melissa G.
April 2026Patio door was the old builder slider that never locked right. New one glides and locks properly. Price was higher than a big box store but the install was much better.
Patio door, Bowmanville
Service areas
Window Replacement Service Areas Around Oshawa
Oshawa Prestige Windows & Doors serves homeowners throughout Oshawa and surrounding Ontario towns, including Whitby, Brooklin, Ajax, Pickering, Courtice, Bowmanville, Newcastle, Port Perry, Uxbridge and Cobourg, plus Orono, Hampton, Columbus, Raglan, Blackstock and Port Hope.
Bowmanville
Century homes, 1910s Carlisle Avenue and fast-growing new subdivisions.
Windows in Bowmanville
Brooklin
Foggy 1990s sliders, Meadowcrest bungalows and heritage-district homes.
Window replacement in Brooklin
Pickering
Front and patio doors, quieter glass by the 401, Bay Ridges to Seaton.
Window and door replacement in Pickering
Port Perry
Heritage district rules, lake wind and cottage windows on Lake Scugog.
Windows in Port Perry
Uxbridge
Century homes, moraine farmhouses and the Brock Street heritage area.
Window replacement in Uxbridge
Whitby
Werden's Plan brick homes, 1970s bungalows and 1990s builder windows.
Window replacement in Whitby- Years in windows and doors
- 35+
- Openings replaced a year in Durham
- 1,100
- Installation warranty
- 5 yr
- Every opening measured twice
- 2x
Not Sure What You Need?
Send a photo of the worst window and a rough count of the openings. We'll tell you if it looks like a repair, a retrofit or a full-frame job before anyone drives over.
Window Replacement FAQ for Oshawa Homeowners
Ask us a questionHow much does it cost to replace windows in Oshawa?
Most standard vinyl windows in Oshawa cost about $500 to $1,400 per opening installed in 2026. Bay and bow windows run $3,000 to $5,000 or more. Full-frame installs, triple pane glass and custom colours raise the price. We give a written quote for each opening after a free measure.
Is there a rebate for window replacement in Ontario?
Ontario's Home Renovation Savings Program has paid $100 per ENERGY STAR window or door opening, after a home energy assessment that must be done before the work starts. Programs change and funds can run out, so check Save on Energy before you sign. We supply the product details the program asks for.
Should I choose full-frame or retrofit window replacement?
Choose retrofit when the old frame and sill are dry and solid: it is faster, cheaper and leaves the inside trim alone. Choose full-frame when the sill is soft, the frame is out of square or you want to insulate around the window properly. We test each sill with a moisture meter before deciding.
Are triple pane windows worth it in Oshawa?
Triple pane is worth it on north and lake-facing walls, in bedrooms near Highway 401 and anywhere you feel cold glass. On a sheltered south wall, a good double pane window with Low-E glass and argon gas performs well for less money. Many homes end up with a mix.
How long does window installation take?
A two-person crew does a typical 10-opening house in one day, and full-frame jobs take one to two days. Before that, custom vinyl windows usually take 6 to 10 weeks to arrive; wood-clad and odd shapes take longer. We install all year, winter included, one opening at a time.
Do I need a permit to replace windows in Oshawa?
No permit is needed to replace a window or door with one of the same size on a house in Oshawa. Making an opening bigger or cutting a new one is an alteration and needs a building permit. A basement bedroom window also has to meet the Ontario Building Code egress size.
Why are my windows foggy between the panes?
Fog between the panes means the edge seal of the sealed unit has failed and moist air got inside. Cleaning won't fix it. If the frame is still sound, we can replace just the glass unit. If the frame is old or damaged too, replacing the window is usually better value.
Can you replace windows in winter?
Yes. We do one opening at a time, so each hole is open for a few minutes and gets covered with plastic if needed. Winter is actually a good time to book: you can feel exactly which windows are the worst, and the install calendar is easier to get into.
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.
Contact Us
Or call (289) 274-1333