67 years of experience

Window & Door Installation and Maintenance Services

Serving Durham Region, including Kawartha Lakes, Ajax, Clarington (Bowmanville, Courtice, Newcastle, Orono), Oshawa, Pickering, Scugog (Port Perry), Uxbridge, Whitby, Peterborough and Peterborough County.

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our Services

Most Popular Services

Dowling & Sons are a dedicated team who work year-round installing windows and doors, making sure the whole process goes smoothly and is done right the first time.

All Services
Door & Window Replacement

Upgrade your home with energy-efficient window replacement that enhances comfort and curb appeal.

Custom Aluminum Work

We specialize in custom aluminum fabrication for garage doors, windows, enclosures, and more.
 

Capping & Repairing Older Doors

We offer expert door capping and repair services to extend the life and improve the look of older doors.

67+

Years Of Experience

Dowling & Sons Home Improvements, family owned and operated since 1958.

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Doors & Windows Residential and Commercial

Examples of Services We Offer:

  • Replacement Windows
  • Insulated Windows
  • Solid Doors
  • French Doors
  • Entry Doors
  • Vinyl Windows
  • Energy Efficient Windows
main REASON TO CHOOSE US

for Your Window & Door Installation Needs?

Planning

We are a family-run company proudly serving homeowners across the Durham Region, specializing in professional window installation, door installation, and custom solutions to enhance your home’s value and appearance.

Quality Supplier

We work with trusted suppliers that provide high-quality, energy-efficient windows and durable doors. Our products deliver long-term value, excellent performance, and style for your home.

Cost Efficient

We offer clear, upfront pricing for your window and door installation projects. Our quotes are accurate, with no hidden costs — so you know exactly what to expect.

Installation

Our team goes beyond basic installation. We provide expert window and door installation services designed to improve your home’s energy efficiency, security, and curb appeal.

Experience

With years of hands-on experience, our team is passionate about quality craftsmanship. Every window and door project we complete reflects our dedication to precision and excellence.

Full Satisfaction

Your satisfaction is our priority. If you ever encounter an issue with your new windows or doors, we’ll work with you to make it right.

We can do it all

From Remodels to New Construction

No window or door replacement project is too big or too small for Dowling & Sons. Whether you need to replace a single window or upgrade all the windows and doors in your home, we’re here to help. We don’t just sell high-quality windows and doors — we provide expert installation to ensure a perfect fit and lasting performance. All of our window and door installations are handled by our own experienced team, allowing us to stand behind our work with a reliable installation warranty. By specializing in professional window replacement and door replacement, we’ve built a trusted reputation for delivering quality craftsmanship at affordable prices.

Open everyday from

8:00-6:00

Call to ask any question

1-289-988-1635

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quality Services

Providing Quality Doors & Windows
Since 1958

Clients
Projects
Years In Business
Services

Other Services we offer

Door Repair
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Shutters & Storefront Shutters
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Patio Doors
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Products & Services
Replacement Glass
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Garden Doors
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Storm Doors
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Testimonials

Why People are Choosing us for Their
Window & Door Installation and Maintenance

I will totally recommend him and his son… they are very professional, detailed, great customer service and best of all the price is right!!!!

Jack S

Newcastle, ON

Wonderful work and I give them a million-star rating! The high-quality workmanship and care far exceed ones wildest imagination.

Kristina Harris

Oshawa, ON

Ordered New Windows to Self Install “Awesome to deal with, great quality windows and reasonable prices. Will definitely call again.“

Denis

Pickering, ON

FAQ

Let’s Us Install the Perfect Window or Door For Home or Business

Dowling & Sons Home Improvements is your leading window & door replacement company located in Oshawa, Ontario.

Read our frequently asked question or contact us, if you can’t find the answer.

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There’s no minimum order requirement for our window replacement services — whether you need to replace a single window or install a hundred new windows, we’re ready to help. Our team provides professional window installation for projects of any size, delivering quality and value every time.

Yes, we offer glass-only replacement services. If your window or door frame is still in good condition, we can replace just the broken or fogged glass to restore clarity, insulation, and performance without a full unit replacement.

Yes, we offer custom-sized windows and doors designed to fit non-standard openings perfectly. Our expert team will carefully measure your space and recommend the best custom window and door solutions to ensure a seamless fit and professional installation for your home.

A full-frame window replacement involves removing the entire window or door, including the old frame, whereas a retrofit window installation keeps the existing frame intact. Full-frame replacements provide superior energy efficiency, address problems like rot or warping in the original frame, and deliver a complete, long-lasting upgrade for your home.

The answer depends on the age and condition of your windows. Older, inefficient windows can lead to energy loss and higher utility bills. By upgrading to modern, energy-efficient windows, you can significantly reduce heating and cooling costs while improving comfort, durability, and overall home performance.

We only install products that we supply to ensure quality and warranty coverage. Exceptions may be made for builders on a case-by-case basis.

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Need Windows or Doors?

Call To Ask Any Question

1-289-988-1635

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