1843 O'Neil Court, Mississauga, ON
Erin Mills, Mississauga · MLS® W13720562
About this home
In short
- Rarely offered luxury home backing onto a private ravine, offering over 7,000 sq. ft. of finished living space in one of the area's most sought-after neighbourhoods.
- Featuring 5 spacious bedrooms, 6 bathrooms, a fully finished walk-out basement, and a 3-car garage, this exceptional residence combines elegance, space, and privacy.
- Enjoy a tranquil, tree-lined backyard with no rear neighbours - a truly rare opportunity to own a premium ravine property in a location where homes like this seldom...
Rarely offered luxury home backing onto a private ravine, offering over 7,000 sq. ft. of finished living space in one of the area's most sought-after neighbourhoods. Featuring 5 spacious bedrooms, 6 bathrooms, a fully finished walk-out basement, and a 3-car garage, this exceptional residence combines elegance, space, and privacy. Enjoy a tranquil, tree-lined backyard with no rear neighbours - a truly rare opportunity to own a premium ravine property in a location where homes like this seldom become available.
Key facts
- Property type
- Detached, 2-Storey
- MLS®
- W13720562
- Bedrooms
- 5
- Bathrooms
- 5 (1 half)
- Size
- 3500-5000 sq ft
- Lot
- 41.8 × 140.85 ft
- Cross streets
- Mississauga Rd / Burnhamthorpe Rd W
- Parking
- 3 garage · 7 parking (attached)
- Driveway
- Private
- Basement
- Finished with Walk-Out
- Heating
- Forced Air
- A/C
- Central Air
- Exterior
- Brick
- Foundation
- Concrete
- Roof
- Other
- Sewer
- Sewer
- Pool
- Inground
- Property tax
- $23,020 / 2026
- Days on market
- 49
- Listing brokerage
- RE/MAX PLATINUM PIN REALTY
Rooms
hardwood floor · window · semi ensuite
hardwood floor · window · ensuite bath
hardwood floor · window
hardwood floor · window
hardwood floor · window · semi ensuite
hardwood floor · window · walk-in closet(s)
hardwood floor · window · ensuite bath
hardwood floor · window
hardwood floor · window
Listed at $3,499,001. Going by how homes in Erin Mills have actually closed against their asking prices (about 99%, 41 local closings in 90 days), the likely sale price is near $3.45M, if it sells. A realistic range is $3.24M to $3.89M.
Independent value check: $2.84M. Without looking at the asking price, our model values the home itself about 19% below the ask (homes like it typically land between $2.66M and $2.98M).
Why $2.84M. The typical detached home sold in Erin Mills over the past year went for about $1.21M (162 sales). What sets this one apart:
- ▲ Raises it stronglyIts tax bill, which follows the city's own assessment, is $23,020 a year; the typical home sold here pays about $7,300.
- ▲ Raises it stronglyIt is 3,500 to 5,000 sq ft; the typical home sold here is 2,000 to 2,500.
- ▲ Raises it slightly3 garage and 7 total parking spaces, against 2 and 5 typically.
Longer on the market than typical. 49 days on the market against about 29 for homes like it here, and asking 23% above where comparable closings put it.
Total price vs nearby homes. Likely closing about $3.45M, from 41 recent closings in this pocket.
The market behind the math:
About 0.9 months of inventory: 12 detached homes for sale in the area against 41 closings in the last 90 days. Under two months favours sellers, over four favours buyers.
Price per square foot: this home lists at $823/sqft against an area asking average of $601/sqft.
- Ravine / green setting. This home is described as backing onto a ravine or green setting. The ravine backing is priced into the comparison. How much it is really worth depends on whether the house sits on table land with the slope well behind it, or drops away right behind it, and that part is my in-person call.
- Inground pool. Priced into the comparison on the assumption it is clean and modern. A pool costs more to build than resale pays back, and condition is the in-person call.
- Walk-out basement. Extra light, usable space, and income potential, so the estimate is a conservative floor for it.
How this estimate is builtthe short version
This figure comes from a model built on about 44,000 recent GTA sales. It weighs this home’s tax assessment, size, age, location and features against what homes like it actually sold for, including sales in this neighbourhood.
It never sees the asking price. The 41 most comparable recent sales on their own, adjusted for size, beds, baths and lot, point to about $2.56M. Condition and finishes remain an in-person call.
What the listing highlights2 points to weigh
Claims from the listing, worth confirming in person. I can book you a private showing.
- Walk-out basement: natural light and strong in-law or income potential. Income potential
- Ravine lot: privacy and premium value, but confirm the buildable area and any conservation limits. Worth verifying
Read this with carewhy it’s an estimate, not an appraisal
The listing states size as a wide range, so the size adjustment is approximate and this estimate is a rough read. I can confirm exact square footage to tighten it.
Based on 41 comparable homes that sold in Erin Mills over the past two years, from 313 closings there.
Nothing closely matching this home is listed nearby right now, so these are the nearest detached listings on the market. Homes like this one have recently closed around $2.84M, which is where my estimate comes from.
Per square foot, these ask about $532/sqft; this home lists at $823/sqft. Size is part of the price story, not just the sticker.
The 5 closest active listings nearby.
See all comparable homesSold price trend
Median sold price for detached homes in Erin Mills: $1.10M in September 2026, up 2% from a year ago, on 160 closings in 12 months.
Line: median sold price, each month averaged with its neighbours and weighted by closings. Bars: closings that month.
Month by month
| Month | Median sold | Closings |
|---|---|---|
| October 2025 | $1.14M | 19 |
| November 2025 | $1.19M | 12 |
| December 2025 | $1.00M | 7 |
| January 2026 | $1.10M | 7 |
| February 2026 | $1.32M | 8 |
| March 2026 | $1.25M | 11 |
| April 2026 | $1.23M | 14 |
| May 2026 | $1.28M | 22 |
| June 2026 | $1.22M | 17 |
| July 2026 | $1.14M | 15 |
| August 2026 | $1.18M | 15 |
| September 2026 | $1.10M | 13 |
Neighbourhood & location
Erin Mills, Mississauga, ON
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How asking prices compare in the closest areas to this home. Longer bars mean a pricier market.
Typical asking price of active listings of the same type, per area (outliers removed). Mississauga.
Get the full neighbourhood report (schools, parks, transit & safety) →
Affordability & Mortgage
Income needed assumes a ~32% GDS ratio; weekly is mortgage principal & interest only. Price ÷ income is the home price over the income needed. Fixed reference assumptions so listings compare on equal footing, not a lending decision.
Calculate and customize your mortgage and other expenses
Adjust the down payment, rate, and amortization, and add property tax, condo fees, and heating to see your true monthly cost.
Your numbers
Homes over $1.5M can't be insured, so 20% down or more is required.
Conventional (20%+ down). Best insured 5-year fixed 4.34% via Ratehub.ca (as of October 16, 2026); conventional rates run a little higher.
Mortgage amount $2,799,201 · 4.49% over 25 years
Total monthly cost
- Mortgage payment (monthly equivalent)
- $15,477
- Property tax
- $1,918
- Condo / maintenance fees
- $0
- Heating
- $0
- Estimated monthly cost
- $17,396
Add your own property tax, condo fees, and heating on the left for a sharper total.
One-time closing costs
- Ontario land transfer tax
- $73,950
- Estimated closing costs
- $73,950
Plus your down payment of $699,800. Legal fees, title insurance, and adjustments are extra and vary by deal.
Mortgage stress test
Lenders qualify you at the greater of your rate plus 2% or 5.25%. You do not pay this rate. It just shows you could still handle payments if rates rose, so aim to stay comfortable at this higher number.
Over the full 25 years
At the end of your 5-year term
- Total paid over the term
- $928,636
- Principal paid down
- $342,011
- Interest paid
- $586,625
- Balance remaining
- $2,457,190
Talk to Team Asgarian about your options
Rates and programs change often. We will connect you with a trusted mortgage professional and build a plan that fits your budget and goals.
Estimates only, not a mortgage quote or pre-approval. Figures use Canadian semi-annual compounding, current minimum down-payment rules, CMHC premium tiers, and Ontario (plus Toronto, when selected) land transfer tax. Actual rates, taxes, insurance, and closing costs vary by lender and property. Confirm every number with your mortgage professional.
Investor snapshot
The suite is real income here: basements rent in Erin Mills (24 of 150 recent detached leases were basement units, around $1,850 a month). The figure above is the whole house on one lease; rented as two units, the suite alone brings about $1,850 a month on top of the upper floors. Permitted use is worth confirming with the city.
Thinking of this home as an investment? We will pull real comparable rents and run the full numbers with you.
Talk about the numbersThe last 6 whole-home leases in Erin Mills signed at a median of $5,386 a month; adjusted to this home for size, beds and baths, and for where rents stood the month each signed, that is $5,767. The gross yield above is on the asking price, before taxes and upkeep; the cap rate is after them. A finished basement or second suite can push real rent above it. Taxes, fees, and vacancy vary by property, and cap rate is before financing.
Helpful resources
All information deemed reliable but not guaranteed. For personal, non-commercial use only. Listing courtesy of RE/MAX PLATINUM PIN REALTY. MLS®/PropTx.