Window & Door Replacement in
Kitchener, Waterloo and Cambridge
Custom-built replacement windows and doors for Waterloo Region homes
25-year window performance guarantee. ENERGY STAR options. Free in-home assessment.
Book a Free AssessmentOptima Windows and Doors replaces windows and doors for homeowners across Waterloo Region. From older brick homes near Downtown Kitchener and Uptown Waterloo to the stone-built streets of Galt and newer subdivisions on the edges of all three cities, every project starts with a free in-home assessment and a written quote for the openings you want to replace.
Replacement windows built for Waterloo Region winters
Kitchener, Waterloo and Cambridge see cold, snowy winters and warm, humid summers. Windows here need to seal tightly, resist condensation on the room side of the glass and keep operating smoothly after years of freeze and thaw. Optima builds its vinyl windows in its own facility, including the insulated glass units, and makes each window to the measured size of your opening.
Many homes in the region date from the post-war decades, and plenty still have their original or first replacement windows. Common reasons homeowners call us include drafts, windows that no longer open or lock properly, fog between the panes, and basements that need larger or safer windows during a renovation.
Serving Kitchener, Waterloo and Cambridge
We assess and install across all three cities. If you live nearby and are not sure whether we cover your address, call the office and we will confirm.
Kitchener
From early 1900s brick homes around Victoria Park and Downtown Kitchener to post-war bungalows and back-splits in Stanley Park and Forest Heights, and newer homes in Doon and Huron Park. Older homes often suit hung windows that keep a traditional look.
Waterloo
Older homes near Uptown Waterloo, established neighbourhoods such as Beechwood and Lakeshore, and newer west-side communities like Laurelwood and Columbia Forest. Casement windows are a popular choice for strong ventilation and a tight seal.
Cambridge
Cambridge combines the historic cores of Galt, Preston and Hespeler, with many older stone and brick buildings along the Grand and Speed rivers, plus newer subdivisions in areas such as Hespeler and East Galt. We match window styles and colours to the character of each home.
Replacement windows for Waterloo Region homes
Every style is available with double or triple-pane glass and a range of colours. Your assessment covers which style suits each room.
Casement and awning
Crank-out windows that open wide for airflow and press against their seals when closed. See casement and awning windows.
Hung and slider
Traditional up-and-down or side-to-side operation that suits older homes and tight spaces. See hung and slider windows.
Picture and fixed
Large, non-opening glass for views and light, often combined with operating windows. See fixed windows.
Bay and bow
Projecting windows that add space and light to living rooms and front elevations. Compare bay and bow windows.
Basement and egress
Hopper, slider and larger egress openings for finished basements and back-splits. See basement windows and egress windows.
Tilt and turn, triple pane
European-style operation and extra glass for quieter, warmer rooms. See tilt and turn and triple pane windows.
Entry and patio doors
A new front door changes how a home looks from the street and how it feels in January. Optima's entry doors come in steel and fibreglass with multi-point locking and a wide choice of glass inserts, sidelites and colours.
For the back of the house, patio and garden doors include sliding, French and multi-panel options. Each door is fitted and sealed to the opening, with the trim and finishing work listed in your quote.
A recent project in Kitchener
In June 2025, Optima replaced windows and a front door for a Kitchener homeowner. The photo, shared in the customer's five-star Google review, shows the new black entry door with a decorative glass insert, fitted into the existing brick opening.
See more customer photos from across Ontario in Our Works.
What to expect
Waterloo Region sits outside the core GTA, so appointments are planned around our team's schedule. When you book, we confirm the next available assessment date for your address.
Free in-home assessment
We look at each opening you want to replace, talk through styles, glass, colours and trim, and take measurements. You receive a written quote that lists the products, installation and finishing work.
Custom manufacturing
Your windows are built to the measured sizes. Your quote confirms the expected timeline for your order.
Installation
The crew removes the old units, installs and insulates the new ones, seals and finishes the trim, and cleans up before leaving.
Written coverage and support
Windows carry a 25-year performance guarantee, and doors have product-specific coverage. See the warranty page. If something needs attention later, use the service request form.
Frequently Asked Questions
Do you replace windows and doors in Kitchener, Waterloo and Cambridge?
Yes. Optima assesses and installs in all three cities. If you live in a nearby community and are not sure whether we cover your address, call (647) 800-6973 and the office will confirm.
How much does window replacement cost in Waterloo Region?
It depends on the number of openings, the sizes and styles, the glass and the installation work each opening needs. The window cost calculator gives an early budget range, and your assessment produces a written quote for your home.
Is the in-home assessment free?
Yes. The assessment and written quote are free, with no obligation.
What warranty comes with Optima windows and doors?
Optima windows carry a 25-year performance guarantee covering parts and labour. Patio and entry doors have their own product-specific coverage. Full terms and certificates are on the warranty page.
Can I see Optima products in person?
Yes. Optima's showroom is at 30 Labourers Way, Brampton. Call ahead to plan your visit.
Waterloo Region windows and doors service area
Optima Windows and Doors serves Kitchener, Waterloo and Cambridge, along with nearby Guelph and the GTA, including Milton, Mississauga, Brampton and Hamilton.
