Basement window replacement cost is one of those topics where the range people quote online is almost useless without local context. A standard basement window swap in Windsor-Essex costs very differently from an egress window installation in a brick foundation — and both of those are very different from enlarging a small utility opening to accommodate a finished bedroom.
Advanced Home Services has been installing basement windows across Windsor-Essex since 1988. We’ve worked on slab foundations, poured concrete, and block foundations in homes from Lakeshore to Kingsville. Here’s what things actually cost in this market in 2026, and what drives the number in one direction or the other.
Standard Basement Window Replacement Cost
Replacing an existing basement window in its current opening — same size, same style, swap the old unit for a new one — is the most straightforward basement window job and typically the least expensive.
In Windsor-Essex, a standard basement window replacement generally runs $400 to $800 per window installed, depending on the style of unit, the glass package, and the condition of the existing frame and opening. This range covers the window unit, labour, and basic interior trim finishing.
The most common basement window types in local homes are:
Hopper windows tilt inward at the top and are hinged at the bottom. They’re common in homes from the 1970s through the 1990s and are one of the more straightforward replacements. A standard vinyl hopper in a typical basement opening runs toward the lower end of the range.
Sliding (horizontal) windows operate along a track and are more common in newer construction. They’re generally easy to replace and well-suited to basement openings that are wider than they are tall.
Casement windows are increasingly popular in basement applications because they swing fully open, which matters if the window also needs to serve as an emergency egress. Casement windows in a basement application run toward the higher end of the standard range due to the additional hardware.
If the existing frame is in good condition and the opening doesn’t need enlargement, this is a clean, fast job. Most standard basement window replacements take two to four hours per opening.
Common basement window types in Windsor-Essex homes
Most common in older Essex County homes. Straightforward like-for-like swap. Cannot meet Ontario Building Code egress requirements.
Well-suited to openings wider than they are tall. Can meet egress requirements if the frame size allows — worth confirming before assuming.
Swings to a full 90-degree open position — the cleanest way to achieve the Ontario Building Code clear opening requirement for below-grade bedrooms.
Industry average estimates only. Figures reflect typical Ontario contractor rates for standard basement window replacements in existing openings, 2026. Costs increase significantly if the concrete opening requires enlargement. These are not Advanced Home Services prices.
When the Opening Needs to Be Enlarged
Here’s where costs increase substantially: when the existing window opening is too small to accept the replacement unit, or when you’re upgrading to a larger window for light, ventilation, or egress compliance.
Enlarging a basement window opening in a concrete or block foundation requires cutting. This is not interior framing work — it involves a concrete saw, significant labour, and care to avoid disturbing the structural integrity of the foundation wall. Not every window company performs concrete cutting work; some subcontract it. Advanced Home Services handles this work directly.
Concrete cut-ins for basement window enlargements typically add $500 to $1,500 per opening to the project cost, depending on the thickness of the foundation wall, the amount of material being removed, the proximity of rebar or block courses, and whether interior finishing is included. On Windsor-Essex’s older housing stock — particularly brick homes in Windsor’s east end and Tecumseh — foundation walls can be thick and the work correspondingly more involved.
Once the opening is enlarged, the window unit itself, installation, and finishing are added on top.
Egress Window Installation Cost in Ontario
If you’re finishing a basement bedroom, converting your basement to a secondary suite, or simply bringing an existing below-grade bedroom into compliance with the Ontario Building Code, egress window requirements apply — and the cost picture changes significantly.
Under Section 9.9.10 of the Ontario Building Code, any below-grade room used for sleeping requires a window that meets the following minimum specifications:
- A clear, unobstructed opening of at least 0.35 m² (3.77 sq ft)
- No individual dimension of the clear opening less than 380 mm (15 inches)
- The window must be openable from the inside without tools or special knowledge
- If the window opens into a window well, the well must provide at least 550 mm of clearance in front of the window
- Window wells deeper than approximately 600 mm require a permanent ladder
These specifications come from the 2024 Ontario Building Code and have been mandatory since April 2025. Inspectors measure to the millimetre. Close is not compliant.
Ontario Building Code egress requirements — Section 9.9.10
Inspectors measure to the millimetre. The 0.35 m² is the open, unobstructed area — not the glass size, not the frame. A window that is close but not compliant will fail inspection. Permits are required in Windsor and Essex County for any foundation wall modification.
A standard hopper or horizontal slider that fits a typical old basement utility opening will not meet egress requirements. Most existing basement windows in homes built before 2000 in Windsor-Essex are too small. Achieving egress compliance almost always requires enlarging the opening.
A complete egress window installation — including concrete cutting, the window unit, window well installation, window well drainage, and interior finishing — typically runs $3,500 to $6,500 per opening in our market. This aligns with the Ontario-specific range reported by contractors across the province in 2026. Projects involving unusually thick foundations, structural concerns, or complex drainage situations can exceed that range.
Full egress installation — industry average cost by component, Windsor-Essex 2026
Often the largest single line item. Involves a concrete saw, debris removal, and a structural assessment of the opening before and after. Cost varies with foundation wall thickness, proximity to rebar, and whether the exterior is brick or frame construction. Not every window company performs this work in-house — worth confirming before getting a quote.
A casement window is the standard choice for egress applications because swinging to a full open position achieves the clear unobstructed opening the Ontario Building Code requires. Hopper and slider styles typically cannot reach 0.35 m² of clear area. Cost depends on unit size, frame material, and glass package.
A window well holds back soil and provides clear escape space. Cost depends on depth below grade, material choice, and drainage requirements. In Windsor-Essex, where some areas sit on higher water tables, drainage is not optional — a well that pools water creates waterproofing problems far more expensive to fix later.
Covers setting the window unit, properly flashing the exterior opening, sealing around the frame, and waterproofing the well perimeter. Proper flashing matters particularly here — a basement window that allows water infiltration at the sill causes problems far more costly than the original installation.
Interior drywall framing, trim, and finishing around the new opening. Permit fees in Windsor and across Essex County typically run $200 to $500 for foundation wall modifications. Work without a permit creates disclosure obligations at home sale. Every egress installation we perform is fully permitted.
Industry average estimates only. Figures reflect typical Ontario contractor rates for complete egress window installations in 2026, sourced from Ontario contractor data. Projects with unusually thick foundations, structural issues, or complex drainage may exceed the upper range. These are not Advanced Home Services prices — contact us for a free on-site assessment.
Permits are required in Windsor and across Essex County for any work that involves cutting or modifying a foundation wall. Permit fees vary by municipality but are typically in the $200 to $500 range. Work without a permit creates problems at home sale time, so it’s not a step worth skipping.
Does an Egress Window Add Value to Your Home?
Yes — but the more precise answer is that it unlocks value you already have.
A basement bedroom without a legal egress window cannot be listed or marketed as a bedroom in a real estate transaction in Ontario. A basement bedroom with a compliant egress window can be. In Windsor-Essex’s housing market, the difference between a 2-bedroom home with a basement rec room and a 3-bedroom home with a finished basement bedroom is meaningful in both listing price and buyer appeal.
According to Angi’s national cost analysis, egress window installation delivers an average ROI of 50% to 75%. In practical terms, if your egress installation costs $4,500 and it allows you to market a basement room as a legal bedroom, the value addition to your home likely exceeds the investment.
Beyond resale, egress windows provide genuine life-safety function. A fire on the main floor can trap anyone sleeping below grade who doesn’t have a reliable, code-compliant escape route. The building code requirement exists for that reason, not as a paperwork exercise.
Basement Window Costs and Our Egress Resources
If you’ve already read our guide to egress codes and Ontario Building Code requirements, you have a good foundation for understanding what your specific project needs. That post covers the technical specifications in detail, including the specific OBC articles that govern egress, window well requirements, and how inspections work.
If you haven’t read it yet, it’s worth the few minutes — particularly if you’re planning to finish a basement bedroom or are unsure whether your existing basement windows are compliant.
What Drives Basement Window Cost in Windsor-Essex Specifically
A few factors specific to our local housing stock are worth knowing before you request quotes.
Foundation type.
Poured concrete foundations — common in homes built from the 1970s onward — are generally easier to cut than older block or rubble stone foundations. Windsor’s east end and older parts of Essex County have a higher proportion of older foundation types, which can add labour time and cost.
Depth below grade.
The deeper the window opening sits below exterior grade, the more window well work is required. Homes on low-lying properties in Lakeshore or near the waterfront in Amherstburg sometimes have basement floors that sit significantly below grade, requiring larger and deeper window wells.
Water table considerations.
Parts of Windsor-Essex sit on relatively high water tables. Window well drainage needs to be taken seriously in these areas — a window well that pools water is a waterproofing liability. Any egress installation we do includes attention to window well drainage and weeping tile connection where appropriate.
Brick and stone exteriors.
Windsor-Essex has a high proportion of brick-exterior homes. Cutting through brick from the exterior, managing the lintel, and finishing the brick opening after installation adds both time and cost compared to frame-construction homes.
Basement window replacement cost in Windsor-Essex depends heavily on what you’re doing with the opening. A standard like-for-like swap is one of the more affordable window jobs on a home. An egress installation in a concrete-walled basement is a more involved project with meaningful cost — but also meaningful return in both safety and home value.
Use our project builder to describe your basement window situation, or call Advanced Home Services at 519-945-6454 to book a free on-site assessment. We’ll look at your foundation, your existing openings, and your goals — and give you a clear, accurate picture of what your project will involve and what it will cost.
