239 Williamson Drive, Ajax, ON
Northwest Ajax, Ajax · MLS® E13773406
About this home
In short
- Stunning Executive Home in Prestigious Northwest Ajax.
- Step inside to discover gleaming solid hardwood floors, a versatile main-floor bedroom/office, and a thoughtfully designed 3,100 sq. ft. layout.
- The upper level offers an airy open-concept feel with 4 generous bedrooms, complemented by two massive family rooms on the main and upper floors-giving growing...
- The finished legal 2-bedroom basement suite with a den and separate entrance provides outstanding passive income potential to offset your mortgage.
- Ideally situated steps from top-rated French Immersion schools, minutes to Highway 401, 407, GO Transit, 7 mins to Costco, and 11 mins to the waterfront.
Stunning Executive Home in Prestigious Northwest Ajax! Offering 4+1 spacious bedrooms plus a legal 2-bedroom basement suite and 4 bathrooms, this exceptional residence combines luxury, functionality, and additional income potential in one of Ajax's most desirable communities. Featuring outstanding curb appeal with an enclosed porch and expansive interlocking driveway accommodating 5 cars, this home impresses from the moment you arrive. Step inside to discover gleaming solid hardwood floors, a versatile main-floor bedroom/office, and a thoughtfully designed 3,100 sq. ft. layout. The upper level offers an airy open-concept feel with 4 generous bedrooms, complemented by two massive family rooms on the main and upper floors-giving growing families endless space. Unwind in the sun-drenched enclosed porch, which leads out to a beautifully built outdoor living space featuring a custom wooden pergola, sprawling deck, and shade sail-all framed by lush, towering evergreen trees for total backyard privacy. The finished legal 2-bedroom basement suite with a den and separate entrance provides outstanding passive income potential to offset your mortgage. Ideally situated steps from top-rated French Immersion schools, minutes to Highway 401, 407, GO Transit, 7 mins to Costco, and 11 mins to the waterfront. An unmissable opportunity for families and savvy investors alike!
Key facts
- Property type
- Detached, 2-Storey
- MLS®
- E13773406
- Bedrooms
- 5+3 (8 total)
- Bathrooms
- 5 (1 half)
- Size
- 3000-3500 sq ft
- Lot
- 40.3 × 104.99 ft
- Cross streets
- Westney Rd N / Williamson Dr W
- Parking
- 2 garage · 7 parking (built-in)
- Basement
- Finished, Separate Entrance
- Kitchens
- 2 (1 + 1)
- Heating
- Forced Air
- A/C
- Central Air
- Exterior
- Brick
- Foundation
- Concrete
- Roof
- Asphalt Shingle
- Sewer
- Sewer
- Property tax
- $11,009 / 2026
- Days on market
- 34
- Listing brokerage
- CENTURY 21 PROPERTY ZONE REALTY INC.
Rooms
gas fireplace · pot lights · combined w/br
Hardwood Floor
quartz counter · stainless steel appl · combined w/dining
Large Window
open concept · combined w/kitchen · large window
open concept · combined w/kitchen · large window
hardwood floor · closet
hardwood floor · walk-in closet(s) · 4 pc ensuite
hardwood floor · pot lights
combined w/kitchen · pot lights
hardwood floor · walk-in closet(s) · 5 pc ensuite
large window · walk-in closet(s)
open concept · combined w/living · w/o to yard
hardwood floor · separate room · pot lights
Listed at $1,299,900. Going by how homes in Northwest Ajax and the wider GTA have actually closed against their asking prices (about 98%, 18 local closings in 90 days), the likely sale price is near $1.28M, if it sells. A realistic range is $1.20M to $1.44M.
Independent value check: $1.34M. Without looking at the asking price, our model values the home itself about 3% above the ask (homes like it typically land between $1.26M and $1.40M).
Why $1.34M. The typical detached home sold in Northwest Ajax over the past year went for about $1.10M (95 sales). What sets this one apart:
- ▲ Raises it stronglyIts tax bill, which follows the city's own assessment, is $11,009 a year; the typical home sold here pays about $8,200.
Total price vs nearby homes. Likely closing about $1.28M, from 18 recent closings in this pocket.
The market behind the math:
About 5.3 months of inventory: 32 detached homes for sale in the area against 18 closings in the last 90 days. Under two months favours sellers, over four favours buyers.
Price per square foot: this home lists at $400/sqft against an area asking average of $548/sqft.
- Separate-entrance basement apartment features. A finished 3 bed basement apartment with a separate entrance and a second kitchen. A self-contained space for extended family, guests or potential income. Basements do rent in Northwest Ajax: 40 of the 130 detached leases here lately were basement units, around $1,775 a month. That makes the suite real income. Second-suite retrofit status is not verified. A buyer intending to rent should confirm requirements with the Town of Ajax.
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 18 most comparable recent sales on their own, adjusted for size, beds, baths and lot, point to about $1.25M. Condition and finishes remain an in-person call.
What the listing highlights4 points to weigh
Claims from the listing, worth confirming in person. I can book you a private showing.
- Separate entrance / basement suite: rental or in-law income potential, if it is legally registered and retrofit-compliant. Income potential
- Open-concept layout: modern, sought-after flow. Lifestyle
- Hardwood floors: quality hardwood is durable and broadly desirable. Lifestyle
- Transit / schools nearby: convenience and resale support, verify the exact distances and school catchment. Value driver
Read this with carewhy it’s an estimate, not an appraisal
There were not many closely comparable homes right in Northwest Ajax, so I widened the search to the surrounding area.
Based on 18 comparable homes that sold in Northwest Ajax over the past two years, from 181 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 $1.34M, which is where my estimate comes from.
Per square foot, these ask about $388/sqft; this home lists at $400/sqft. Size is part of the price story, not just the sticker.
The 4 closest active listings nearby.
See all comparable homesSold price trend
Median sold price for detached homes in Northwest Ajax: $1.06M in September 2026, down 1% from a year ago, on 95 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 | $1.06M | 8 |
| November 2025 | $1.13M | 6 |
| December 2025 | $1.05M | 10 |
| January 2026 | $1.20M | 5 |
| February 2026 | $1.10M | 6 |
| March 2026 | $1.10M | 7 |
| April 2026 | $1.25M | 11 |
| May 2026 | $1.13M | 8 |
| June 2026 | $1.04M | 12 |
| July 2026 | $1.15M | 10 |
| August 2026 | $1.07M | 6 |
| September 2026 | $1.06M | 6 |
Neighbourhood & location
Northwest Ajax, Ajax, ON
Enter a workplace or destination and we’ll show the door-to-door time by car, transit and bike.
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). Ajax.
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
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 $1,039,920 · 4.49% over 25 years
Total monthly cost
- Mortgage payment (monthly equivalent)
- $5,750
- Property tax
- $917
- Condo / maintenance fees
- $0
- Heating
- $0
- Estimated monthly cost
- $6,667
Add your own property tax, condo fees, and heating on the left for a sharper total.
One-time closing costs
- Ontario land transfer tax
- $22,473
- Estimated closing costs
- $22,473
Plus your down payment of $259,980. 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
- $344,994
- Principal paid down
- $127,059
- Interest paid
- $217,935
- Balance remaining
- $912,861
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 Northwest Ajax (40 of 130 recent detached leases were basement units, around $1,775 a month). The figure above is the whole house on one lease; rented as two units, the suite alone brings about $1,775 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 49 whole-home leases in Northwest Ajax signed at a median of $2,887 a month; adjusted to this home for size, beds and baths, and for where rents stood the month each signed, that is $3,820. 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 CENTURY 21 PROPERTY ZONE REALTY INC.. MLS®/PropTx.