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Clera Windows + Doors is proud to serve Markham homeowners across downtown, Unionville, Cornell, Thornhill, and Buttonville. Our door/window installers also serve Toronto and the GTA, including Richmond Hill and Scarborough. Clients living in Markham can visit our facility and showroom in Vaughan!
Contact your local Clera representative for a free, no obligation consultation for windows and doors installation Markham.
Our local representative has been serving Markham and surrounding areas for over 10 years!
Discover how affordable your new windows and doors can be with our latest promotions.
With its blend of historic charm and rapid expansion, Markham home upgrades require versatile solutions that balance aesthetic appeal with high performance. If you’re looking to upgrade windows for greater energy efficiency, increased fresh air, and lowered utility bills, our team is here to help.
Clera Windows + Doors provides residential window services Markham residents rely on for superior quality and long-term performance. Our factory-direct model ensures you get the best value without compromising on quality. Discover the difference in our Markham windows and doors, manufactured right here in Ontario!
Is it time to replace windows/doors in your living space? Browse our extensive selection of ENERGY STAR certified windows and doors in Markham, designed to flood your home with natural light while boosting curb appeal.
Install windows you’ll love for years to come. Timeless bay and bow windows, floor-to-ceiling fixed windows, classic casement windows, and more.
Shop New Windows
Your front door is the focal point of your home. Our door replacement Markham specialists help design systems that offer maximum security and year-round weather protection.
Shop Exterior Doors
Get expert patio door installation in Markham. Low-maintenance designs, sliding or garden door styles, custom-built for your home.
Shop Patio Doors
Clera is a trusted choice for Markham windows and doors because we handle the entire process. Many homeowners express ease of working with our expert team, from the local sales reps who love what they do to our factory-trained window installers and door installers who prioritize exceptional results. By manufacturing our own custom windows, we can offer financing solutions that make it easier than ever to invest in your home's future.
From the first phone call to our expert door/window installation services, our commitment to customer satisfaction is what sets us apart from other Markham window replacement companies. Call us today to learn more about our factory-direct pricing, lifetime warranty, and flexible financing options!
With some of the highest ratings for customer satisfaction, it's clear why Clera is Ontario's most awarded window company!
9.2/10
on HomeStars
16x Homestars Winner
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We have perfected our installation service to ensure that having your doors and windows replaced is a stress-free experience from start to finish. These five steps outline what window and door replacement in Markham looking like with Clera Windows + Doors.
New windows with advanced spacers and Low-E glass prevent heat transfer. This means your HVAC system doesn't have to work as hard, which helps reduce energy costs year-round. Clera’s Brilliance Windows offer superior insulation compared to standard vinyl or PVC windows.
The cost of window replacement Markham projects typically ranges from $700 to $3,000 per unit for standard residential styles like sliders or hung windows, while specialty options like bay/bow windows can range from $3,000 to $8,000. Your final cost will depend on the dimensions, glass package (double-glazed vs triple-glazed windows), and frame colours.
Because we are a factory-direct company, our prices include expert installation to ensure long term performance. For a precise estimate tailored to your Markham home, we recommend booking a free consultation.
Most residential projects are completed in a single day by our professional window installation team, depending on the number of openings being replaced.
Choosing Clera for your Markham windows and doors project means choosing a partner dedicated to excellence. We understand that your home is your most important investment, which is why we focus on delivering superior quality in every frame we build.
Whether you’re looking for awning windows for your basement or a secure new entry system, our local Markham team provides the expertise to make your vision a reality. Join the thousands of local families who have upgraded their curb appeal with the most trusted name in the industry!
