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Service Area

Windows & Doors in Markham

Last updated: August 1, 2026

Window, door, masonry and egress installation across Markham — from Unionville heritage homes to modern Cornell builds.

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Markham coverage and scheduling

Every Markham neighbourhood

Unionville, Cornell, Cathedraltown, Berczy Village and Thornhill — we install across all of Markham.

Fast scheduling

Most Markham projects are quoted within the week. Installs typically begin within 4–6 weeks.

Local references

Hundreds of completed Markham projects. Ask for references in your neighbourhood when you request your estimate.

Markham Projects

Built for Markham homes — old and new

Markham spans Unionville Main Street homes from the 1840s, post-war Thornhill bungalows, and brand-new Cornell and Cathedraltown builds. Each era needs a different install approach — heritage frames, brick veneer cuts, or new-build air sealing. Common Markham projects include casement window, tilt & turn, and bay window replacements, along with steel and fiberglass entry doors, sliding patio doors, full masonry work, code-compliant egress windows, and Markham permit assistance. Flexible financing is available, or you can request a free quote any time. See what Markham-area homeowners say about working with us.

Brick-to-brick window replacement on established homes in Unionville and Thornhill
Retrofit installation across newer Markham subdivisions
White exterior window replacements matching traditional brick homes
Fiberglass and steel entry door installations across all price points and home styles
Masonry repair tied to window resizing projects on older Markham homes
Egress window and window well installation for basement bedroom conversions

Markham Neighbourhoods

Window and door installation in every Markham neighbourhood

Visit a dedicated page for your area to see common projects, local references and what to expect.

Windows & Doors in UnionvilleWindows & Doors in CornellWindows & Doors in CathedraltownWindows & Doors in Berczy VillageWindows & Doors in Thornhill

FAQ

Frequently Asked Questions

It depends on the age and condition of your existing frame. Older homes in areas like Unionville and Thornhill more often call for brick-to-brick, while newer subdivisions are typically well-suited to retrofit. We assess your specific windows as part of your quote.
Yes. Homes along Unionville's Main Street date back to the 1840s and often require true divided-light patterns, narrow sightlines, and historically accurate brick mould to preserve the streetscape's character. We offer these details in our fiberglass and wood-clad lines specifically for this type of heritage-sensitive project.
Most Thornhill bungalows from this era have structurally sound wood-framed openings behind the brick veneer, which makes retrofit installation the typical fit. We still check each opening individually, since some homes in this era have settled enough at the sill to need shimming or minor frame correction as part of the install.
Often the seals on builder-grade dual-pane units fail within 10–15 years. We inspect first and only recommend replacement when it makes sense.
Yes — both, depending on the home's style and the homeowner's finish preference. Larger custom builds in areas like Cathedraltown often call for taller, wider entry doors than a standard opening, which we build to the exact dimensions of the home rather than fitting a standard-size unit into a custom opening.
Yes, though the work itself differs by neighbourhood. Newer communities like Berczy Village and Cathedraltown typically need retrofit installation since the existing frames are still structurally sound, while older areas like Unionville more often call for brick-to-brick replacement due to the age of the masonry. We assess each home individually rather than applying one approach citywide.

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Your Nearest Trust Build Location

Serving Markham from our Concord (HQ) location — 1950 Hwy 7, Building C, Unit 1B, Concord, ON L4K 3P2.

Related Reading for Markham Homeowners

Project write-ups and guides from our blog that cover work in and around Markham.

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