Our family and dedicated staff have been installing and manufacturing custom quality windows & doors since 1985. Our passion and desire drive us to deliver windows & doors that you will be proud of. 

In 1962, our father, Hermano Pereira immigrated from his native Portugal and found a job in a local wood window manufacturing plant located in Toronto. After a long successful career with one of Canada’s leading window manufacturers and establishing a love for the window & door business, Hermano opened up his own operation.  Since that time, our family; along with our dedicated staff, have proudly provided specialized window and door installation services to thousands of residential and commercial customers in the Greater Toronto Area.

After 36 successful years and 11 consecutive Top Choice Award wins, Dundas Specialty Windows & Doors continues to evolve alongside the industry’s changing design trends, expanding product selection and specialized services. Our operation is built on three strong principles which we maintain today; quality materials, meticulous design and craftsmanship, and unbeatable customer care.  We are an enthusiastic team of experienced professionals that will assist you through every stage of your replacement window and door selection process.  We offer only the finest industry brands.  Our suppliers manufacture top-of-the-line replacement windows and doors using state-of-the-art manufacturing practices and the highest quality materials. We are also dedicated to providing quality products that enhance the environment. By using less energy in our homes, we can reduce the amount of carbon dioxide emissions released into the atmosphere.  Thank your for visiting Dundas Specialty Windows & Doors.

Hermano Pereira


February 8, 1944 - November 27, 2021

It is with great difficulty we share that our father, Hermano Pereira, passed away on November 27, 2021.

No words can adequately express our sadness at our father’s passing, or our gratitude for the impact he has had on our lives.  We will honour his memory by dedicating ourselves to continuing the work he loved so much.


Nelson Pereira

Vice President

Raised in the family business, Nelson has been in the window and door industry since 1985. What started out as a part time job, has grown into a life long career and a solid reputation in the industry. Nelson is fluent in all aspects of the residential and commercial window and door industry and also specializes in the historical/heritage wood window and door markets.

Janet DeNobrega

Architectural Sales

With her warm, friendly and knowledgeable demeanour, Janet ensures your window and door selection is pleasant and stress free. With over 20 years of experience, Janet will smoothly guide you through our vast product selection and ensure your final decision is the right one for you.

Karen Raposo

Office Manager

Every business has that one person that “holds down the fort”… at Dundas Specialty Windows & Doors that role belongs to Karen. In charge of many aspects of the business, including scheduling, she is the go to person for daily operations.



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