Proudly Canadian, Toronto-Owned Since 1989.

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LOCALLY MADE SINCE 1989

Windows & DoorsReplacement in Toronto

Upgrade your home with Delco's high performance windows and doors

Proven. Trusted. Award-Winning.

  • Canadian Product
  • SAWDAC
  • Fenestration Canada
  • Energy Star

TORONTO’S MOST TRUSTED WINDOWS AND DOORS COMPANY

Upgrade your home with Delco’s high-performance windows and doors for comfort, energy efficiency, built for Canadian weather.

Industry-Leading Innovation at the Heart of Your Home

Replacement Entry Doors

Secure, durable entry doors that enhance curb appeal, improve insulation, and protect your home year-round.

Replacement Patio Doors

Smooth-sliding and elegant patio door solutions that maximize natural light while delivering excellent thermal performance.

WHY DELCO? HOMEOWNERS ACROSS THE GTA CHOOSE

Excellent Reputation

Since 1989 our reputation exceeds expectations to go along with our positive customer reviews

Expert Installation

Our teams of qualified and insured installers will transform your vision to reality

Competitive Pricing

Dealing with a manufacturer direct will benefit our customers with lower costs

Excellent Warranty

As a leader in the industry we provide the most comprehensive transferrable warranty in the business

Maximum Energy Efficiency

Introducing the high performance SLIMLINE89 window that will improve efficiency by at least 24%

Attractive Financing Options

Excellent deferral options to go along with low monthly payment programs. Replace today pay later

Before & After Transformations

See how Delco's professional window & door installation transforms homes across the GTA

See more of our work

Vaughan, Ontario

After — Vaughan, Ontario
Before — Vaughan, Ontario

Toronto, Ontario

After — Toronto, Ontario
Before — Toronto, Ontario

Etobicoke, Ontario

After — Etobicoke, Ontario
Before — Etobicoke, Ontario

Get a Free Window & Door Estimate

45 minutes

Tell us about your project and our team will contact you to schedule your free in-home consultation.

  • See design, material, and color options
  • Measure your windows and/or doors
  • Explain the installation day process
  • No-obligation quote for your project

SIERRA PACIFIC Windows

Windows that never compromise

Delco proudly introduces Sierra Pacific, the world’s largest wood window manufacturer, offering premium aluminum-clad and all-wood windows, curtain walls, and extensive door options — designed to meet the needs of homeowners, architects, and builders.

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Award Winning Doors And Windows Manufacturer in Toronto

AS SEEN ON AND TRUSTED BY HOMEOWNERS ACROSS ONTARIO

What makes our product award-worthy? It’s our relentless focus on delivering the best. From pioneering advanced insulation technologies that significantly reduce energy cost to crafting designs that seamlessly blend with Toronto’s diverse architectural styles.

ULTRASLIM Vinyl Windows

More Glass, Less Frame, Bigger Energy Saving

Reduce your window’s exposure to the elements, while increasing energy efficiency. Delco’s Slimline89 delivers the slimmest window yet, while lowering your energy bills through advanced window frames. . . guaranteed!

Now Available In Triple-Pane!

What GTA Homeowners Are Saying About Delco

Adam Rivers
★★★★★

Amazing service and quality products. Installation was on time and on budget. Our windows look awesome. Edan gave us his full attention from the first call and every step of the way after. Highly recommend.

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Geraint
★★★★

New windows and door for basement and new metal/glass back door for main house - even through my indecisiveness and the covid-19 challenges Ayal and his installers were patient with me and I am very happy with the look and quality of the install.

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Ruven Y.
★★★★★

It was a pleasure dealing with Jack and all Delco's stuff. The windows arrived on the date for which were promised. The quality of the service, product and workmanship were excellent. I would gladly recommend Delco to anyone need Windows and Doors

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Jim Bird
★★★★★

We're so happy with our new front door. Very high quality finish, beautiful window. Installation was impeccable and done very quickly. Hinge and 3-point lock mechanism fit perfectly and feel very solid. Very attentive customer service. Door really ups our curb appeal!

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Expert advice. Exceptional results. Delco handles it all.

We supply and install windows and doors in the greater Toronto area. Let’s have a smooth and hassle-free windows and door replacement experience with our four step process.

01

Evaluation and Advice

Located in Toronto, Delco listens to your needs and recommends the perfect products, ensuring the best results for your home.

02

Manufacturing

In Toronto, we measure and manufacture doors and windows with precision, using premium materials for lasting quality.

03

Installation

Our expert installers ensure windows and doors fit perfectly, perform optimally, and are installed efficiently, professionally, leaving your home spotless.

04

Post-Installation Support

Our commitment continues after installation, providing maintenance advice, adjustments, and warranty support — our dedicated team is always ready to assist.

Stronger Windows. Safer Doors. Security Built at the Factory.

Replace your windows and doors with factory-laminated security glass and a built-in multi-point locking system, engineered to stop forced entry before it starts, while keeping your home quieter.

Factory-Applied Security Film

Three layers of 3mm glass bonded with a PVB interlayer. Resists shattering, holds broken glass in place.

  • For Vinyl Windows
  • For Vinyl Patio Doors

Secure 3-Deadbolt System

Closing your door automatically engages three locking points simultaneously.

Laminated Glass

Three glass layers with bonded vinyl laminated interlayer

  • For Fiberglass and Steel Doors
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TIPS AND ADVICE

Delco’s Guide to Transform Your Home

Popular FAQs

If I already have a double-pane window, is that energy efficient?
Although double-pane is more significantly insulative than a single pane window, you should be aware of the age of your windows. If your double-pane windows are older than 20 years, chances are, the seals have cracked, and there may be leakage. Also, old double-pane windows were made in an era before many of the advanced technologies like gas fillings, vinyl frames, and low-conductive spacers were readily available. Many of our homeowners replace old double-pane windows with new ones, and see significant energy savings.
Are windows from Canada different than windows from the USA?
What is most important to look for is the Energy Star Certified in Canada label. It is similar to the ratings system in the States; but for the Canadian market. Because Canada’s overall climate is trends towards colder winters, it is essential to have high-efficiency windows. Delco Windows & Doors carries a full line of certified high-efficiency windows.
Do I need to get a permit to install a new window?
A permit is required in the event that you will be making structural or material changes to your house as part of the installation. In other words if you are creating new openings, or increasing the size of your windows, a permit is necessary.
What is the difference between vinyl windows and other windows?
A vinyl window is actually referring to the frame, not the glass itself. Glass panes remain “made of glass”. But the frame, the material along the edges that holds the window together, can be made of many kinds of material, including aluminum, vinyl (pvc), and wood. Vinyl has a low conductive property, which means that the temperature between outside and inside stay apart longer, and don’t pass through as easily as metal. For energy efficiency we refer to vinyl and fiberglass windows. 
What are gas-filled windows?
When a window is filled with gas, Argon, (and sometimes krypton and xenon) is injected into the space between the glass panes of the window. This forms a denser barrier, functioning much like water, that slows down the temperature transfer between the inside and outside of a window. Gas-filled windows are one of many features that help create energy efficiency. Older windows in your home likely do not have this gas-filled feature, as it a more recent development over the past 20 years.
I want to make a larger window than what is already there. Can I do that?
In some cases, yes. However, it all depends on the load-bearing nature of the studs in your wall near the vertical sides (jambs) of your window. If they are transferring significant structural load around your window, it is not wise to adjust the width. Often times, the height of a window, however, is easier to change; still providing you a larger, more spacious, window.

Real Homes. Real Installations. Real Results.

Delco Windows & Doors

Ready to Upgrade Your Windows?

Get expert advice, accurate pricing, and professional installation from one of the GTA's most trusted window and door companies.

Free on-site measurement Written quote No obligation Installation included

Delco Service Areas

PROUDLY SERVING THE TORONTO AND GREATER TORONTO AREA

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