21 Shadbolt Court, Markham, ON
Unionville, Markham · MLS® N13700662
About this home
In short
- Situated on a premium 50' x 125' corner lot on a quiet court, this architecturally designed home offers approximately 5,500 sq. ft. of luxurious living space...
- Rebuilt from the ground up with modern elegance and superior craftsmanship, the home features soaring ceilings, expansive windows, premium finishes, designer...
- The spacious primary retreat offers a spa-inspired ensuite and custom walk-in closet, while generously sized bedrooms provide comfort for the entire family.
- Located within top-ranked school districts and just minutes to Main Street Unionville, Toogood Pond Park, Whole Foods, Markville Mall, Highway 407, GO Transit, and...
- A rare opportunity to own a newly rebuilt luxury home in a mature, highly sought-after community where new construction is seldom available.
Welcome to this exceptional brand-new custom luxury residence in one of Unionville's most prestigious and established neighbourhoods. Situated on a premium 50' x 125' corner lot on a quiet court, this architecturally designed home offers approximately 5,500 sq. ft. of luxurious living space including a professionally finished walk-up basement. Rebuilt from the ground up with modern elegance and superior craftsmanship, the home features soaring ceilings, expansive windows, premium finishes, designer lighting, hardwood flooring throughout, a chef-inspired gourmet kitchen with high-end appliances, custom cabinetry, oversized centre island, and an open-concept layout ideal for both family living and entertaining. The spacious primary retreat offers a spa-inspired ensuite and custom walk-in closet, while generously sized bedrooms provide comfort for the entire family. The finished walk-up basement offers exceptional flexibility with additional bedrooms, recreation space, and potential for multi-generational living. Double garage plus four-car driveway. Located within top-ranked school districts and just minutes to Main Street Unionville, Toogood Pond Park, Whole Foods, Markville Mall, Highway 407, GO Transit, and every major convenience. A rare opportunity to own a newly rebuilt luxury home in a mature, highly sought-after community where new construction is seldom available. Move in and enjoy luxury living with the peace of mind that comes with a newly built home.
Key facts
- Property type
- Detached, 2-Storey
- MLS®
- N13700662
- Bedrooms
- 4+2 (6 total)
- Bathrooms
- 5
- Size
- 3500-5000 sq ft
- Lot
- 50 × 130 ft
- Cross streets
- Gainsville/Shadbolt
- Parking
- 2 garage · 6 parking (attached)
- Basement
- Finished with Walk-Out, Separate Entrance
- Kitchens
- 2 (1 + 1)
- Heating
- Forced Air
- A/C
- Central Air
- Exterior
- Stone, Stucco (Plaster)
- Foundation
- Concrete, Steel Frame
- Roof
- Flat
- Sewer
- Sewer
- Property tax
- $2,997 / 2025
- Days on market
- 55
- Listing brokerage
- AIMHOME REALTY INC.
Rooms
hardwood floor · 4 pc ensuite
hardwood floor · double doors
hardwood floor · bay window · 2 way fireplace
hardwood floor · combined w/living
b/i closet · hardwood floor
4 pc ensuite · b/i closet · hardwood floor
hardwood floor · 4 pc ensuite
Hardwood Floor
Hardwood Floor
hardwood floor · 4 pc ensuite
b/i closet · hardwood floor
open concept · modern kitchen
Hardwood Floor
Listed at $3,480,000. Going by how homes in Unionville and the wider GTA have actually closed against their asking prices (about 98%, 38 local closings in 90 days), the likely sale price is near $3.42M, if it sells. A realistic range is $3.20M to $3.85M.
Independent value check: no figure for this home. Going only by the sales record, our model lands more than 25% below the ask. At that distance an automated figure has rarely been close to the eventual sale price, so we are not printing one. The listing describes a new or newly built home, and the public record (tax bill, size) can still describe what stood on the lot before.
Longer on the market than typical. 55 days on the market against about 26 for homes like it here, and asking 59% above where comparable closings put it.
Total price vs nearby homes. Likely closing about $3.42M, from 38 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 38 closings in the last 90 days. Under two months favours sellers, over four favours buyers.
Price per square foot: this home lists at $819/sqft against an area asking average of $672/sqft.
- Corner lot. Two street frontages: more to landscape, shovel and mow, and more exposure to traffic, wind and headlights at night. Buyers price that against an interior lot on the same street, so I read this one on the cautious side and confirm the setting in person.
- Walk-out basement apartment features. A finished 2 bed walk-out basement apartment with a separate entrance and a second kitchen. A self-contained space for extended family, guests or potential income. In Unionville basements rarely rent out (16 of 182 recent detached leases were basement units), so buyers here treat a suite as family or nanny space rather than income. Value it for the living space, not the rent. Second-suite retrofit status is not verified. A buyer intending to rent should confirm requirements with the City of Markham.
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 38 most comparable recent sales on their own, adjusted for size, beds, baths and lot, point to about $1.91M. Condition and finishes remain an in-person call.
What the listing highlights5 points to weigh
Claims from the listing, worth confirming in person. I can book you a private showing.
- Renovated / rebuilt: recent work can mean fewer upfront costs, worth confirming the scope, quality, and that permits were pulled. Value driver
- Upscale kitchen: a genuine value driver, verify the appliances, stone, and finishes in person. Value driver
- Tall ceilings: they transform how a home feels, worth confirming the actual heights room to room. Worth verifying
- Primary suite: a key comfort and resale feature. Lifestyle
- Open-concept layout: modern, sought-after flow. Lifestyle
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 38 comparable homes that sold in Unionville over the past two years, from 230 closings there.
The closest active listings by size, beds, and price, so you can see what this home is up against.
Per square foot, these ask about $725/sqft; this home lists at $819/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 Unionville: $1.70M in September 2026, down 7% from a year ago, on 126 closings in 11 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 | $1.76M | 8 |
| November 2025 | $1.84M | 9 |
| December 2025 | $1.78M | 9 |
| January 2026 | $1.63M | 10 |
| March 2026 | $1.68M | 12 |
| April 2026 | $1.59M | 19 |
| May 2026 | $1.69M | 9 |
| June 2026 | $1.75M | 16 |
| July 2026 | $1.73M | 5 |
| August 2026 | $1.60M | 19 |
| September 2026 | $1.70M | 10 |
Neighbourhood & location
Unionville, Markham, 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). Markham.
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 $2,784,000 · 4.49% over 25 years
Total monthly cost
- Mortgage payment (monthly equivalent)
- $15,393
- Property tax
- $250
- Condo / maintenance fees
- $0
- Heating
- $0
- Estimated monthly cost
- $15,643
Add your own property tax, condo fees, and heating on the left for a sharper total.
One-time closing costs
- Ontario land transfer tax
- $73,475
- Estimated closing costs
- $73,475
Plus your down payment of $696,000. 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
- $923,593
- Principal paid down
- $340,153
- Interest paid
- $583,439
- Balance remaining
- $2,443,847
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
About the suite: in Unionville basements rarely rent out (16 of 182 recent detached leases were basement units), so the figure above does not count it as income. Buyers here use a suite as family or nanny space.
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 22 whole-home leases in Unionville signed at a median of $4,685 a month; adjusted to this home for size, beds and baths, and for where rents stood the month each signed, that is $5,372. 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 AIMHOME REALTY INC.. MLS®/PropTx.