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SERVING YORK REGION& SURROUNDING AREAS

Premium windows & doors for Markham homes.

When your windows let in the cold or your door stops closing properly, it's not just an inconvenience — it affects your whole home. Markham Windows & Doors has spent over 20 years making sure York Region homeowners don't have to put up with that. One call and we'll sort it.

  • Free in-home estimate
  • 20+ years in business
  • Energy Star Partner
  • Lifetime warranty
★★★★★ 4.9 / 5 from 380+ Markham homeowners
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No obligation. Same-day reply during business hours.

    20+
    Years in business
    8,500+
    Windows installed
    4.9★
    Average review
    100%
    Licensed & insured
    ABOUT US

    Twenty years of windows & doors, right here in Markham.

    We're a Markham family business, and this community is where we live and work. For over 20 years, we've been supplying and installing windows and doors for homeowners and commercial clients across York Region. Every project is completed by our own crew and held to the same standard we'd expect in our own home.

    Whether you need a single window replaced, a full-home installation, or a commercial fit-out, we handle it from start to finish. Book a free in-home estimate and we'll come to you — usually within 48 hours.

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    Twenty years of windows & doors, right here in Markham.
    20+ years
    in Markham
    WHY CHOOSE US

    Not just another windows & doors company.

    From the estimate to the final seal, every step is handled by our own Markham-based crew — no middlemen, no shortcuts, no excuses.

    Rooted right here

    We live and work in York Region. Every estimate, every install, every follow-up call is handled by people who know this community — because it's ours too.

    Two decades of experience

    Over 20 years of windows and doors across Markham, Unionville, Stouffville and beyond. We've seen every wall type, every frame condition, every tricky opening.

    Guaranteed for life

    Our workmanship warranty lasts as long as you own your home. Combined with manufacturer product warranties, your investment is fully protected.

    Energy Star certified

    We install Energy Star–certified windows and doors so you qualify for federal and provincial rebates — and actually feel the difference in your heating bill.

    Licensed, insured & accountable

    Licensed contractors, WSIB coverage, and full liability insurance. You're protected from the first visit to the final cleanup.

    One crew, start to finish

    No subcontractors, no handoffs. The same team that measures your home builds your order and completes your install — every single time.

    OUR SERVICES

    Everything your windows & doors need, under one roof.

    No matter the job, you get the same Markham-based team, the same standard of work, and the same lifetime guarantee.

    QUALITY THAT LASTS

    The difference is in the detail — every time.

    At Markham Windows & Doors, we serve both residential and commercial clients across York Region — and regardless of the scale of the project, our standard never changes. A window or door is only as good as the materials it’s made from and the hands that fit it. That’s why we source exclusively from certified manufacturers and install everything with our own trained crew. Poor workmanship is the number one reason windows and doors fail prematurely — bad seals, misaligned frames, and rushed finishes that let in cold air and moisture.

    We don’t cut corners because we know what happens when someone does. Every install we complete is backed by a lifetime workmanship warranty — because we’re confident in the work, and you deserve that confidence too. And because we install Energy Star-certified products, you may also qualify for federal and provincial rebates on qualifying upgrades — something we’re happy to walk you through when we visit.

    Get a free quote Call us today 647-660-4805 Text with us
    The difference is in the detail — every time.
    Lifetime
    workmanship warranty
    THE PROCESS

    Here's exactly what happens when you call us.

    We've made the process as easy as possible — because replacing windows and doors should never be stressful.

    01

    Free consultation & estimate

    One of our own installers visits your home, takes proper measurements, and walks you through your options honestly. We assess the condition of your existing windows and doors, understand what you're trying to achieve, and give you a fixed quote — no guesswork, no pressure.

    02

    Your order, built to spec

    We custom-order every window and door to your exact opening through our local supplier. You choose the style, glazing, and finish that works for your home and budget. Nothing comes off a shelf — every unit is built specifically for your property. Typical lead time is 3 to 4 weeks.

    03

    Professional installation

    Our crew arrives on time, protects your floors, removes the old units, and fits and seals everything properly. We work cleanly and efficiently — most homes are completed in one to two days. You won't be left with a half-finished job or a team that disappears between visits.

    04

    Walkthrough & lifetime cover

    Once everything is in, we walk through every unit with you, make sure everything opens, closes, and seals the way it should, and register your warranty on the spot. We clean up fully before we leave — and we're a phone call away if you ever need us, for life.

    EVERYDAY BENEFITS

    The right windows & doors change how your home feels — every single day.

    Windows and doors do more for your home than most people give them credit for. They regulate temperature, keep noise out, hold heat in, and are the first line of defence against the elements and intruders. When they’re the right product for your home and fitted properly, the difference is immediate — and it stays that way for decades.

    That’s why product quality and installation quality are equally important to us. A premium window, poorly fitted, will underperform within years. Get both right and your home is quieter, warmer in winter, cooler in summer, and worth more when it matters.

    • Year-round comfort: No more cold spots by the window in January or heat pouring in during July. Properly installed, well-sealed units keep your indoor temperature consistent all year.
    • Lower energy bills: Better insulation means your heating and cooling system works less hard. Energy Star–certified windows and doors can significantly reduce energy costs.
    • Stronger home security: Modern frames, multi-point locking systems, and impact-resistant glass make your home significantly harder to breach — without compromising on looks.
    • Higher property value: New windows and doors are one of the highest-return upgrades a homeowner can make. They improve curb appeal, pass inspection, and give buyers confidence.
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    CLIENT EXPERIENCES

    Thousands of York Region homes later — here's what people say.

    Ask us for references on your street — chances are we've already worked there.

    WHERE WE WORK

    WHERE WE WORK

    From Stouffville to Scarborough, our team covers all of York Region and beyond — with the same local care on every job.

    • Markham
    • Unionville
    • Thornhill
    • Richmond Hill
    • Stouffville
    • Aurora
    • Newmarket
    • Vaughan
    • Pickering
    • Ajax
    • Scarborough
    • North York
    Based in Markham, ON Travel throughout York Region & GTA
    GOT QUESTIONS?

    Helpful answers before starting your project.

    Every question deserves a real answer. Here are the ones we get asked most often.

    It depends on what's actually wrong. Broken hardware, a stiff handle, or a minor draft can usually be repaired without much fuss. But if you're seeing moisture between the panes, feeling significant cold air around the frame, or dealing with visible rot or warping, replacement is almost always the better long-term call. We'll tell you honestly which one makes sense when we come out — we won't push a replacement if a repair will do the job.
    Most residential jobs are done in one to two days. A single door or a couple of windows can often be completed in a few hours. Larger projects — full-home replacements or commercial installations — may take a little longer, but we'll give you a clear timeline before we start and stick to it. We don't drag jobs out across unnecessary visits.
    In a York Region winter, yes — without question. Properly specified and installed Energy Star windows make a real difference to how your home holds heat, how your heating system performs, and how comfortable your rooms feel day to day. Most homeowners notice the difference within the first season. They also tend to reduce condensation, cut outside noise, and can qualify you for federal and provincial rebates.
    Noticeably, yes. Multi-pane glass combined with proper sealing around the frame makes a real difference — especially if you're near a busy road or in a high-traffic neighbourhood. The improvement isn't just about the glass itself — a lot of noise comes in through gaps and poor seals around older units. When everything is fitted properly, the difference in a room can be quite striking.
    Yes — and it's not a sales visit. We send one of our own installers, not a commission-based rep, to look at your home properly, take measurements, and give you an honest assessment of what's needed. You'll leave the conversation with a clear picture of your options and a fixed quote. No obligation, no follow-up pressure.
    Every job is different — the cost depends on the number of windows, the style, the glazing type, and the condition of your existing frames. We'd rather come and see the job properly than give you a figure that means nothing. What we do is visit your home, measure everything properly, and give you a fixed written quote with no hidden charges. Most homeowners find our pricing straightforward and fair.
    In most cases, we can schedule a free in-home estimate within 48 hours of your call. We'll send one of our own installers — not a salesperson — to measure your openings, assess the condition of your current units, and walk you through your options. There's no obligation to proceed and no pressure during the visit.
    Yes. We are fully licensed contractors with WSIB coverage and liability insurance. You're protected throughout the entire job — from the first visit to the final cleanup. We're happy to provide proof of insurance and licensing before any work begins. When you invite a trades team into your home, you should always ask — and we'll always have the answer ready.
    YOUR NEXT STEP

    Let's take a look — no obligation, no pressure.

    Whether you know exactly what you need or just know something isn't right, call us. A Markham-based installer will come to you, assess everything properly, and give you a straight answer — at no cost and no commitment.

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    Get in touch

    • Phone
      647-660-4805
    • Hours
      Mon–Fri 8am–7pm · Sat 9am–5pm