Window replacement in Toronto condos is not the same as a window replacement in a freehold home. There are rules, approvals and legal considerations specific to condominium living in Ontario that must be followed – before a single measurement is taken or a quote signed – or it can cost you your time, your money, and possibly even your spot.
This guide suits the needs of Toronto condo owners in 2026. It explains who’s responsible for your windows, the impact of Ontario’s Condominium Act on your rights, what your board needs from your installer, what you can expect to pay for replacement windows in the GTA condo market, and the energy rebates available for condo owners this year. A high-rise apartment in downtown, a midtown mid-rise or a townhouse condo in North York, Etobicoke – this is the full picture.
Step One: Who Actually Owns Your Condo Windows?
The first question that is on the mind of every Toronto condo owner is – it isn’t a general rule, but it’s in your building’s Declaration and Status Certificate.
In Ontario, condominium windows are generally categorized in two different ways:
Windows as Common Elements: For the majority of high-rise and mid-rise condos in Toronto, especially those built prior to 2000, windows become part of the exterior envelope of the building – the common elements. In this case, the Condo Corporation will be liable for maintenance, repair and replacement under the Reserve Fund. If your windows are broken and are considered common elements, you notify your Property Manager, and the Corporation’s approved contractor takes care of it. Hiring your own installer is usually not an option.
Window as a Unit Owner’s Responsibility: With most townhouse condos, stacked townhouses and some newer buildings in Toronto, windows make up the individual unit. With this one, the replacement cost and contractor choice is up to you and you must still get board approval first.
Knowing which applies to you: Ask for a Status Certificate and carefully read the Declaration. A section of the Bylaw titled the ‘Standard Unit Bylaw’ will be established to define the elements that are part of the unit and not the Corporation. When in doubt, check with your Property Manager in writing first.
It’s a high-priced error. If the windows are deemed common elements and not authorized by the Board, you may find that they must be removed and replaced again at your cost.
The Ontario Condominium Act – What Section 98 Means for Toronto Owners
If the windows are in your unit’s responsibility – or if you are replacing windows that are connected to the building’s exterior envelope – you need to know Section 98 of the Ontario Condominium Act (1998).
Section 98 states that a condo owner cannot make an alteration, addition, or improvement to the common elements of the property without entering into a written agreement with the Condo Corporation first. Since windows are typically part of the building’s exterior envelope – even when the owner is responsible for them – most window replacements in Toronto condos trigger a Section 98 Agreement.
This agreement is a legal agreement between you and your Condo Corporation. It sets out three basic points: the improvement is yours; you (and any owner of your unit in the future) are responsible forever to keep it in good order and repair; the design and specification requirements of the Corporation have been fulfilled.
In the real world that means: You must have a signed Section 98 Agreement before your installer books an elevator. Most Toronto Condo Boards allow between 2 and 6 weeks for these to be processed – so make sure to account for this in your project plan up front.
What Your Board Will Require Before Approving Window Replacement
Toronto condo boards are getting more organized and the most frequently cited cause of stalled projects is an incomplete package. Below are the typical questions most boards throughout the GTA will ask before approving:
Written Specifications: Window style, colour, frame material, type, and installation method should match the existing window specifications or be approved as an upgrade. There is a high chance that most boards will not approve a change in window profile or exterior colour – uniformity of appearance is the standard requirement in almost all Toronto condo buildings.
Contractor’s Certificate of Insurance: Your window installer should have general liability insurance, usually at least $2 million per occurrence. An additional insured must be named on the Certificate. If the installer can’t produce this on the spot, then the company is not right for a condo job.
WSIB Clearance Certificate: Workplace Safety and Insurance Board clearance indicates that your installer is in good standing with WSIB and that the Corporation will not be responsible for any injuries that may occur during the installation process. For any condo board in Toronto, this is a must.
Elevator and Parking Booking: Most buildings will need a service elevator and construction parking arrangement (typically a street permit where installation van clearance underneath the building is not available). This will be done by an experienced condo window installer directly with your Property Manager.
Scope of Work and Timeline: Describes the work, anticipated start and end dates, and notes that no changes in the structure are intended.
Our team at Milano knows the documentation that condo boards require and can give you all the documents that you need – insurance certificate, WSIB clearance, scope letter and specifications – as standard practice on every condo project.
Best Windows for Condos in Toronto – What to Specify in 2026
Most Toronto condos will need you to match the window style and profile of the surrounding neighborhood. It means you have a design choice which is essentially done on your behalf, but you have a performance specification where you can make your mark – and where you’ll get the best bang for your buck.
Glass Package: This is the one thing that really makes a difference in the condo replacement environment. Switching to a triple-pane, low-e, argon-filled sealed glass window will make a significant difference in thermal comfort, condensation resistance and acoustics over an outdated single pane or basic double pane window. In Toronto’s climate, triple pane glass is appropriate for any north or west facing exposure.
Low-E Coating: Low-E (low emissivity) glass has a coating that helps to prevent heat loss during the winter and solar gain during the summer. In condos that face south or west (which are popular in Toronto’s downtown and midtown towers), the correct Low-E specification will ensure that the unit won’t overheat (or cause blindness).
Frame Material: In Toronto, most condo boards call for vinyl frames on low-rise and mid-rise structures, and aluminum on high-rise towers of six or seven storeys. Aluminum is suitable for tall buildings in Toronto and will comply with fire code and structural wind load criteria; vinyl will be found to be better for thermal performance in lower buildings.
Weatherstripping and Seal Quality: One of the main causes of heating and cooling losses in a high rise condo is infiltration of air around the perimeter of the windows. A good replacement with the correct installation of weatherstripping can make a difference in comfort and utility costs immediately – especially on the upper floors where wind pressure is much greater.
Condo Window Replacement Cost in Toronto – 2026 Numbers
Condo window replacement Toronto is more expensive than the freehold home project because of two reasons: the logistics are more complex, and the specification requirements are more limited.
As a practical reference for the Toronto GTA market in 2026:
The typical window replacement cost for a standard condo window – one that is the same profile as the original window in a mid-rise structure – ranges from $700 to $1200 per window, depending on window size, glass package and installation difficulty. Triple pane windows are around $150 to $350 more expensive than double pane windows. For high rise installations where elevated access or special rigging is required, the cost will be quoted on a project specific basis.
If your Condo Corporation is replacing windows in many units at once, the per window cost can be significantly lowered by opting for a bulk rate – sometimes as much as 15-30% less than replacing windows one-by-one.
Ontario Home Renovation Savings Program (HRSP) – 2026 Update: Condo owners in Toronto can take advantage of the Ontario HRSP rebate and receive $100 for every qualifying rough opening on any ENERGY STAR-certified window replacement. For the unit with eight windows, that would be $800 back if the replacement windows are of a quality that meet the specified energy efficiency standard and the owner (not the Corporation) is covering the replacement costs. Before the project starts, check eligibility with your Property Manager, as windows that are deemed common elements could be subject to an application by the Corporation instead of the individual owner. As of 2026, no new applications will be accepted for the Canada Greener Homes Grant and Enbridge HER+ programs.
If you are interested in 0% financing options, Milano can help you understand if you qualify for HRSP during your free consultation.
Choosing the Right Window Installer for Your Toronto Condo
Not all Toronto window firms are familiar with condo installations – and that doesn’t take long to become apparent when the board package is incomplete, the elevator is not booked or the installer shows up without the proper documentation.
When choosing a window company for your Toronto condo project, these are your non-negotiables:
Experience with Toronto condo buildings particularly – not simply residential properties. A company that has done the Section 98 Agreements, Board approval submissions and service elevator coordination will save you weeks of back and forth. Complete coverage forms sent as a matter of course – not as an afterthought that takes a week to request. Immediate and current WSIB clearance. Commitment to delivering a match to your building’s exact building specifications, including custom sizing if necessary. A written quote that clearly distinguishes between labor, materials and any logistics costs.
Milano Windows & Doors has been installing condo windows in Toronto and the GTA for more than 27 years. Our team performs the entire board documentation package, working directly with your Property Manager and completes installations in the same manner that your building expects.
The Bottom Line for Toronto Condo Owners
Changing windows within a condo in Toronto is not as straightforward as many homeowners think – but it’s a very manageable process when done in the right order. Begin with your Declaration to establish who will take responsibility. Provide documentation of the contractor to the board early. Choose an appropriate glass package for your building type, level. But hire an installer who has an understanding of the Toronto condo scene and can manage the paperwork and logistics without jeopardizing the project.
Milano Windows & Doors has been installing condo windows in Toronto and the GTA since 1997. We do the complete board approval package, work within your building specifications and provide installations that are board approved and backed by a lifetime transferable warranty.
Call 437-464-2753 or book your free in-home consultation online. We service condos across Toronto, North York, Etobicoke, Scarborough, Mississauga, Markham, Vaughan, and all GTA communities.
Frequently Asked Questions – Condo Window Replacement Toronto
Q: Do I need board approval to replace windows in my Toronto condo even if I'm paying for it myself?
Yes. Window replacement is usually a task that requires board approval as windows are attached to the building’s exterior, which is a common element in most Toronto condos. If the project is paid for, you must provide all required documentation to your Property Manager and seek written approval prior to the work being done. It will take 2-6 weeks to receive approval, so please plan ahead and do not schedule to install before approval is received.
Q: Can I choose any window style or colour when replacing my condo windows in Toronto?
Usually not. Most condo corporations will mandate that the window replacement be of the same look, exterior appearance and frame colour as the rest of the building. Window replacement – window styles or colours are rarely approved, as it may impact the building’s uniform appearance. But many condos will permit improvements to energy-efficient elements like Low-E glass, argon gas fills, and triple-pane glass as long as the front of the condo is not altered.
Q: What happens if I replace my condo windows in Toronto without board approval?
Windows replacement in condos without permission can have serious repercussions. You may be expected to return the original condition to your unit, including removal of the new windows, at your own cost by the condo corporation. There is also the possibility of fines, legal proceedings and liability for damages arising during installation. Never begin any work without written approval, otherwise you could end up in expensive conflicts and the work may be prohibited by condo rules.
Q: Can a condo owner in Toronto apply for the Ontario window rebate program in 2026?
In some cases, yes. Owners of condominiums could receive rebates for replacing windows with ENERGY STAR® window equipment if they are directly responsible for the replacement costs. However, eligibility will be determined based on how the condo corporation defines responsibility for windows in its governing documents. In situations where the windows are deemed to be common elements, the corporation may have to apply. Always check requirements before beginning a project.
Q: Does replacing condo windows in Toronto require a City of Toronto building permit?
Most window replacements that are the same size and type as the window being replaced can be done without a building permit. Permits may be required, however, if the project requires structural alterations, increasing openings or changes to the building envelope. Note: Board approval and building permits are two different requirements. A professional condo window contractor will be able to help you decide if your project requires a permit or not.
Q: How long does the condo window replacement approval process take in Toronto?
Approval is usually granted within 2 to 6 weeks, depending on the procedures and meeting schedule of your condo corporation. Delays happen when necessary documents are not included in the package of documents sent, such as WSIB clearance or proof of insurance. Having a seasoned condo window contractor with full documentation can help ease the process and minimize approval delays, particularly during busy construction seasons.
Q: Is DIY condo window replacement allowed in Toronto?
No. Most Toronto condo corporations do not allow DIY window replacement. Because windows are part of the building envelope, installations must typically be completed by licensed and insured contractors with condo experience. DIY work can result in approval violations, liability issues, and potential damage to the building. Hiring a qualified professional ensures the installation meets condo requirements, protects building integrity, and helps avoid costly penalties or corrective work.