12 Miner Circle, Markham, ON
Unionville, Markham · MLS® N13872096
About this home
In short
- An exceptional luxury residence nestled in the prestigious Unionville community, ideally situated on a quiet circle offering privacy and tranquility.
- This rare home features 4+ bedrooms and 7 bathrooms, with over 5,000 sq ft of refined living space (4,691 sq ft above grade plus a finished basement), perfect for...
- Extensively upgraded with high-quality custom enhancements throughout, the home showcases a stunning chef's kitchen complete with stainless steel appliances, custom...
- Equipped with two furnaces for enhanced comfort and efficiency, the home also features elegant hardwood flooring across the main and second levels, complemented by...
- The fully finished basement, featuring a separate entrance, offers exceptional versatility with a spacious recreation area and potential for an in-law suite.
An exceptional luxury residence nestled in the prestigious Unionville community, ideally situated on a quiet circle offering privacy and tranquility. This rare home features 4+ bedrooms and 7 bathrooms, with over 5,000 sq ft of refined living space (4,691 sq ft above grade plus a finished basement), perfect for large or multi-generational families.Extensively upgraded with high-quality custom enhancements throughout, the home showcases a stunning chef's kitchen complete with stainless steel appliances, custom backsplash, and premium countertops. Equipped with two furnaces for enhanced comfort and efficiency, the home also features elegant hardwood flooring across the main and second levels, complemented by sophisticated designer ceilings and a skylight that fills the space with natural light.Each bedroom is thoughtfully designed with its own ensuite, while the grand primary suite boasts an oversized custom walk-in closet. The fully finished basement, featuring a separate entrance, offers exceptional versatility with a spacious recreation area and potential for an in-law suite.Conveniently located with easy access to Highways 7, 404, and 407, and just minutes from top-rated schools, shopping plazas, and everyday amenities, this remarkable home presents a rare opportunity to experience luxury living in one of Unionville's most sought-after neighborhoods.
Key facts
- Property type
- Detached, 2-Storey
- MLS®
- N13872096
- Bedrooms
- 4+1 (5 total)
- Bathrooms
- 7 (2 half)
- Size
- 3500-5000 sq ft
- Lot
- 130.15 × 95.08 ft
- Cross streets
- Warden /Highway 7
- Parking
- 3 garage · 9 parking (attached)
- Driveway
- Private
- Basement
- Separate Entrance, Walk-Up
- Heating
- Forced Air
- A/C
- Central Air
- Exterior
- Stone
- Foundation
- Concrete
- Roof
- Asphalt Shingle
- Sewer
- Sewer
- Property tax
- $19,500 / 2025
- Days on market
- 8
- Listing brokerage
- RE/MAX REALTRON REALTY INC.
Rooms
gas fireplace · coffered ceiling(s) · pot lights
window · walk-up · 2 pc bath
w/o to balcony · 4 pc bath · closet organizers
hardwood floor · gas fireplace · window floor to ceiling
hardwood floor · open concept · w/o to yard
hardwood floor · window floor to ceiling · formal rm
walk-in closet(s) · 7 pc ensuite · hardwood floor
stainless steel appl · marble counter · backsplash
w/o to balcony · 4 pc bath · walk-in closet(s)
w/o to balcony · 4 pc bath · walk-in closet(s)
b/i shelves · pot lights · double doors
3 Pc Ensuite
Listed at $4,300,000. 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 $4.22M, if it sells. A realistic range is $3.95M to $4.76M.
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 usual reason is something the record cannot show: a rebuild, a second unit, or a lot or setting unlike the homes around it.
Total price vs nearby homes. Likely closing about $4.22M, from 38 recent closings in this pocket.
The market behind the math:
About 0.8 months of inventory: 10 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 $1,012/sqft against an area asking average of $756/sqft.
- Separate-entrance basement apartment features. A finished 1 bed basement apartment with a separate entrance. 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 $2.68M. 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.
- Separate entrance / basement suite: rental or in-law income potential, if it is legally registered and retrofit-compliant. Income potential
- Finished basement: added living space, worth checking ceiling height and that the work was permitted. Value driver
- Upscale kitchen: a genuine value driver, verify the appliances, stone, and finishes in person. Value driver
- Primary suite: a key comfort and resale feature. Lifestyle
- Hardwood floors: quality hardwood is durable and broadly desirable. 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.
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 $3.99M, which is where my estimate comes from.
Per square foot, these ask about $773/sqft; this home lists at $1,012/sqft. Size is part of the price story, not just the sticker.
The 3 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 $3,440,000 · 4.49% over 25 years
Total monthly cost
- Mortgage payment (monthly equivalent)
- $19,020
- Property tax
- $1,625
- Condo / maintenance fees
- $0
- Heating
- $0
- Estimated monthly cost
- $20,645
Add your own property tax, condo fees, and heating on the left for a sharper total.
One-time closing costs
- Ontario land transfer tax
- $93,975
- Estimated closing costs
- $93,975
Plus your down payment of $860,000. 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
- $1,141,221
- Principal paid down
- $420,304
- Interest paid
- $720,917
- Balance remaining
- $3,019,696
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 23 whole-home leases in Unionville signed at a median of $4,688 a month; adjusted to this home for size, beds and baths, and for where rents stood the month each signed, that is $5,398. 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 REALTRON REALTY INC.. MLS®/PropTx.