MLS® listing
21 Shadbolt Court: detached house for sale
$3,480,000
From the listing brokerage
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.
Facts on the listing
| Square feet | 3500-5000 |
|---|---|
| Approximate age | New |
| Style | 2-Storey |
| Basement | Finished with Walk-Out, Separate Entrance |
| Lot width | 50 |
| Lot depth | 130 |
| Lot measured in | Feet |
| Faces | South |
| Parking spaces | 6 |
| Garage | Attached |
| Heating | Forced Air |
| Cooling | Central Air |
| Kitchens | 2 |
| Property tax | $2,997 |
| Tax year | 2025 |
| Interior features | Generator - Full |
Listing courtesy of AIMHOME REALTY INC.. MLS® N13700662.
About this detached house
21 Shadbolt Court is a 6 bedroom detached house in TRREB's Unionville community in Markham, listed for sale at $3,480,000. The listing shows 5 bathrooms and 3500-5000 square feet. The lot is listed as 50 by 130 feet. It comes with 6 parking spaces according to the listing. The garage is listed as attached. The nearest main intersection given is Gainsville/Shadbolt. The approximate age on the listing is New.
These details come from the listing brokerage through TRREB's MLS® System and are not guaranteed. Measurements, parking and what is included should be checked at a showing and written into the agreement of purchase and sale.
What it costs to buy 21 Shadbolt Court
At the asking price of $3,480,000, a buyer in Markham pays Ontario land transfer tax on closing. The City of Toronto is the Ontario municipality that charges a municipal land transfer tax of its own, so there is no second tax here.
| Asking price | $3,480,000 |
|---|---|
| Ontario land transfer tax | $73,475 |
| First-time buyer refund, if you qualify | up to $4,000 |
| Minimum down payment | $696,000 |
The down payment figure is the federal minimum: 20 percent of the price, which applies at $1.5 million or more. A lender can ask for more. These figures use the asking price, so they change if you pay more or less. The tax is worked out at the published rates for a home with one or two single family residences and your lawyer confirms the final amount. Legal fees, title insurance and adjustments are extra: our closing costs guide lists them. This is general information, not legal or tax advice. Confirm the figures with a lawyer or accountant. You can change the price in our land transfer tax calculator and our mortgage calculator.
What it costs to own each month
| Property tax (2025) | $2,997 a year, about $250 a month |
|---|
That is before a mortgage payment, home insurance and utilities. These are the figures on the listing, so check the current tax bill before you rely on them.
How the asking price compares
TRREB's Market Watch recorded 108 detached sales in Markham in September 2026, at a median of $1,381,500 and an average of $1,534,139. This home is listed at $3,480,000, which is $2,098,500 above that median.
A city-wide median covers every size, age and neighbourhood, so it is a reference point and not a valuation of this home. Lot, size, condition and location all move the price. Our September 2026 market report and our Markham house prices page have the figures for each home type.
What to check before you make an offer
- Book a home inspection. An inspection looks at the parts of a house you cannot judge at a showing. Our guide explains what a home inspection covers and misses.
- Ask for the survey. The listing gives the lot as 50 by 130 feet. If the seller has a survey, check the lot lines, fences and any easements against it.
- Confirm what stays. Have the appliances, fixtures and any rented equipment written into the offer.
- Confirm the parking. The listing shows 6 parking spaces.
- Get your financing in writing. A lender looks at the property tax as well as the price.
- See it in person. photos do not show noise, light at different hours or the condition of the roof, the basement and the yard.
Our page on buying a home in Markham sets out the steps in order. This is general information, not legal advice. Confirm the details with a lawyer.
About Unionville
A nineteenth century main street with a GO station at the end of it. Unionville is the neighbourhood most people picture when they picture Markham and its houses carry a premium to match.
Transit: Unionville GO on the Stouffville line, YRT and Viva routes on Highway 7
| Property type | Median | Sales and average |
|---|---|---|
| All property types | $736,500 | 110 sales, average $960,767 |
| Detached | About $1,654,000 | 26 sales, average about $1,689,000 |
| Freehold townhouse (TRREB att/row/townhouse) | About $1,464,000 | 6 sales, average about $1,437,000 |
| Condo townhouse | About $840,000 | 14 sales, average about $924,000 |
| Condo apartment | About $580,000 | 63 sales, average about $628,000 |
Figures from TRREB's community housing market report, as listed in our Unionville guide.
Questions about Unionville
Can you walk to the GO train from most of Unionville?
From the streets closest to Main Street and the Highway 7 corridor, yes. From the northern and eastern edges it is a short drive or a bus connection. Check the specific address before you count on walking.
What kind of homes are on Main Street itself?
Mostly nineteenth and early twentieth century houses, some converted to shops and restaurants. They rarely come up for sale, they often carry heritage considerations and they attract a very particular buyer.
Is Unionville a good place to buy a first home?
It can be, but usually as a condo or an older townhome rather than a house. If your budget is stretched, neighbouring Wismer or Greensborough will buy you more square footage for the same money.
How is parking and traffic around Main Street?
Main Street is busy on summer weekends and during festivals. Residents on the immediate side streets deal with overflow parking several times a year. It is a real trade-off and worth driving on a Saturday before you commit.
Does Unionville flood?
Parts of the area sit near the Rouge tributaries and Toogood Pond. Low lying lots and older basements deserve a close look. Ask for the insurance history and have the grading assessed.
Read the Unionville neighbourhood guide · All Unionville homes for sale
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Questions about 21 Shadbolt Court
How much is land transfer tax on 21 Shadbolt Court?
At the asking price of $3,480,000 the Ontario land transfer tax is $73,475. Markham has no municipal land transfer tax. A first-time buyer who qualifies can get up to $4,000 back. Confirm the final figure with your lawyer.
What is the minimum down payment for 21 Shadbolt Court?
$696,000 at the asking price of $3,480,000, under the federal minimum down payment rules. A lender may require more.
How much is the property tax on 21 Shadbolt Court?
The listing shows $2,997 a year for 2025, about $250 a month.
Is 21 Shadbolt Court priced above or below the Markham median?
It is listed at $3,480,000. TRREB's September 2026 median for detached sales in Markham was $1,381,500 across 108 sales, so the asking price is $2,098,500 higher. The median covers every size and neighbourhood.
How do I book a showing for 21 Shadbolt Court?
Use the form on this page or call us. Quote MLS® N13700662. We will confirm the listing is still available and arrange a time with the listing brokerage.
Is 21 Shadbolt Court still for sale?
This page is refreshed from TRREB's MLS® System through the day. If the listing sells or is withdrawn the page says so. Contact us to confirm before you make plans.
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