MLS® listing
89 Castan Avenue: semi-detached house for sale
$1,188,000
From the listing brokerage
Welcome to this beautifully upgraded, south-facing, 4-bedroom home rarely offered in the desirable South Unionville community. Offering approximately 1,850 sq. ft. of bright, functional living space above grade, this move-in-ready home has been thoughtfully refreshed for modern family living. Freshly painted throughout with modern light fixtures, the home features abundant natural light. The south-facing family room and breakfast area are bathed in sunlight throughout the day, creating warm and inviting spaces for everyday living and entertaining.The newly renovated kitchen features sleek cabinetry, elegant countertops, brand-new stove, dishwasher and range hood, and contemporary finishes. Both upstairs bathrooms have also been comprehensively renovated with brand-new vanities, refreshed tilework, stylish fixtures, and updated lighting.Step outside to the newly renovated deck, perfect for outdoor dining, relaxing, and family gatherings.Located in a quiet, family-friendly neighbourhood near Markville Secondary School, Unionville Meadows Public School, parks, playgrounds, T&T Supermarket, restaurants, Markham Pan Am Centre, YMCA, Main Street Unionville, and Markville Shopping Centre. Easy access to Highways 407 and 404 and Unionville GO Station.Bright, spacious, and move-in ready, this beautifully upgraded home offers an excellent opportunity for first-time buyers, growing families and savvy investors in the heart of South Unionville.
Facts on the listing
| Square feet | 1500-2000 |
|---|---|
| Approximate age | 16-30 |
| Style | 2-Storey |
| Basement | Unfinished |
| Lot width | 26.11 |
| Lot depth | 111.32 |
| Lot measured in | Feet |
| Faces | South |
| Parking spaces | 2 |
| Garage | Built-In |
| Heating | Forced Air |
| Cooling | Central Air |
| Kitchens | 1 |
| Rooms | 9 |
| Property tax | $5,369 |
| Tax year | 2026 |
| Parking | Private |
| Interior features | Carpet Free |
Listing courtesy of FIRST CLASS REALTY INC.. MLS® N13859444.
About this semi-detached house
89 Castan Avenue is a 4 bedroom semi-detached house in TRREB's Village Green-South Unionville community in Markham, listed for sale at $1,188,000. The listing shows 3 bathrooms and 1500-2000 square feet. The lot is listed as 26.11 by 111.32 feet. It comes with 2 parking spaces according to the listing. The garage is listed as built-in. The nearest main intersection given is Residential. The approximate age on the listing is 16-30 years.
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 89 Castan Avenue
At the asking price of $1,188,000, 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 | $1,188,000 |
|---|---|
| Ontario land transfer tax | $20,235 |
| First-time buyer refund, if you qualify | up to $4,000 |
| Minimum down payment | $93,800 |
The down payment figure is the federal minimum: 5 percent of the first $500,000 and 10 percent of the rest. 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 (2026) | $5,369 a year, about $447 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 18 semi-detached sales in Markham in September 2026, at a median of $999,000 and an average of $1,019,322. This home is listed at $1,188,000, which is $189,000 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 26.11 by 111.32 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 2 parking spaces.
- Get your financing in writing. A lender looks at the property tax as well as the price.
- See it in person. The listing has a virtual tour, but 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 89 Castan Avenue
How much is land transfer tax on 89 Castan Avenue?
At the asking price of $1,188,000 the Ontario land transfer tax is $20,235. 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 89 Castan Avenue?
$93,800 at the asking price of $1,188,000, under the federal minimum down payment rules. A lender may require more.
How much is the property tax on 89 Castan Avenue?
The listing shows $5,369 a year for 2026, about $447 a month.
Is 89 Castan Avenue priced above or below the Markham median?
It is listed at $1,188,000. TRREB's September 2026 median for semi-detached sales in Markham was $999,000 across 18 sales, so the asking price is $189,000 higher. The median covers every size and neighbourhood.
How do I book a showing for 89 Castan Avenue?
Use the form on this page or call us. Quote MLS® N13859444. We will confirm the listing is still available and arrange a time with the listing brokerage.
Is 89 Castan Avenue 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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