Perfect Residential Infill Redevelopment Opportunity for Townhouse or Single Family Homes. +203 ft Frontage and backing onto municipal parkland. The property is located in the attractive South Unionville neighborhood featuring in-demand schools and abundant park spaces. Markham official plan allows for Singles, Semi-detached, Townhouse or small multi-plex built from.
3 bedrooms, 2 bathrooms, about 1,500 sq ft, works out to roughly $2,167 per square foot. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.
Inside 313 Helen Ave
Every detail from the listing, in one place.
Type
Detached
Style
Backsplit 4
Living space
1500-2000 sq ftas stated on the listing
Parking
6 spacesYes garage
Basement
Full
Features & systems
Parking & garage
Garage
Yes
Parking spaces
6
Interior
Basement
Full
Lot & land
Lot size (sqft)
0
Listing & possession
Property style
Backsplit 4
Property class
Detached
313 Helen Ave Price & Sale History
Earlier listings of this property, list-price changes, and the most recent annual property tax on the listing.
Independent mortgage broker · OAC · rates subject to change and underwritingMortgage Squad →
Referral disclosure: Summitly may refer you to Mortgage Squad Advisors, an affiliated mortgage partner. You are free to choose any lender or mortgage professional.
Monthly cost
Enter a rate to see the monthly cost
An estimate, not a quote. Utilities and insurance are extra.
Affordability calculator
Estimated monthly payment
$15,966
/mo
based on the purchase price of $3,250,000
$650,000 cash
$2,600,000 financed
$2,189,882 total interest
Principal54%$2,600,000
Interest46%$2,189,882
20% down · 25-yr amortization · 5.50% rate. Principal & interest only — taxes, condo fees, and insurance not included.
Want rate-drop alerts and a saved shortlist?
Figures are Summitly estimates for illustration only — not from TRREB or the MLS® feed, and not a mortgage approval, appraisal, or financial advice.
Rental income potential
Est. monthly rent
low–high
Gross yield
rent × 12 ÷ price
Cap rate (est.)
net of tax + fees
Summitly AI estimate for discussion only — not from TRREB or the MLS® feed, and not an appraisal or investment advice. Yield and cap rate are derived from the estimated rent versus the asking price.
For homeowners nearby
Own a home on Helen Avenue? See what yours is worth
Get an instant estimate for your own home, based on recent sales around you. A free account shows the number and emails you the full report.
Free · No obligation · Backed by Coldwell Banker
Book a tour of 313 Helen Ave with a licensed buyer's agent
Your agent is usually paid from the seller's side. We'll confirm the co-operating commission on this listing before you sign anything.
Zara, any time
Zara · AI virtual agent
Ask about 313 Helen Ave day or night. Zara reads this listing and answers in plain words. When you want a person, she hands you to a licensed agent.
A licensed local agent
Your agent shows you the home, checks the paperwork and negotiates your offer, on your side, not the seller's.
Mortgage financing is arranged through Mortgage Squad Advisors. Summitly is the technology platform that powers this site. Estimated values, AI insights, calculator results, and rental projections shown on this page are generated by Summitly and are not provided by, reviewed by, or sourced from TRREB, the MLS®, or the listing brokerage; they are not appraisals or opinions of value. The trademarks REALTOR®, REALTORS®, and the REALTOR® logo are controlled by the Canadian Real Estate Association (CREA) and identify real estate professionals who are members of CREA. The Coldwell Banker® name and logo are trademarks of Coldwell Banker Real Estate LLC.
Similar homes for sale nearby in Markham
Other 3–4 bed homes for sale in Markham around $3.3M.
Average days on market30Homes sold in about 30 days on average.
Sale-to-list ratio99.3%On average, homes sold below asking.
Active listings1,531Homes for sale here right now.
Median vs prior 90 days+2.4%Compared with May 3 – Aug 1, 2026: prices up.
Based on 1,259 sales from Aug 1 – Oct 30, 2026 (848 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.
313 Helen Ave is listed at $3,250,000 (MLS® N12448686). Summitly updates the price as soon as the MLS® record changes.
Is $3,250,000 a good price for 313 Helen Ave?
Summitly rates it Well Above Market: the asking price is 15% or more above Zara's estimate, an estimate built from recent sales in Markham. The rating is an automated opinion, not an appraisal; "What's it worth?" on this page shows how it is worked out. See Zara's estimate
Has the price of 313 Helen Ave changed?
Yes — it was first listed at $3,950,000 and is now $3,250,000, a drop of $700,000 (17.7%).
How many bedrooms and bathrooms does 313 Helen Ave have?
313 Helen Ave has 3 bedrooms and 2 bathrooms, with about 1,500–2,000 square feet of living space. It is a detached home in Markham.
Is 313 Helen Ave close to transit?
The nearest rapid-transit station is Unionville GO Station (Stouffville GO), about 1.6 km (about a 19-minute walk) in a straight line. Centennial GO Station is about 2.1 km, and Milliken GO Station is about 3.6 km. Distances are straight-line, not walking routes; check the transit agency for routes and schedules.
How much would the monthly mortgage be on 313 Helen Ave?
About $15,966 a month — principal and interest on $3,250,000 with 20% down ($650,000), a 25-year amortization and an assumed 5.5% interest rate. The mortgage calculator on this page lets you change the down payment, amortization and rate.
How does 313 Helen Ave compare with other homes in Markham?
Its asking price of $3,250,000 is about 196% above the median sold price in Markham over the last 90 days, $1,098,000, across 1,259 closed sales on the TRREB MLS®. A city median mixes every type and size of home, so the comparable sales on this page are the closer guide.
Has 313 Helen Ave been sold before?
Summitly has no earlier MLS® sale or lease of 313 Helen Ave on record from the last two years. Older records aren't shown under TRREB rules.
Where is 313 Helen Ave?
313 Helen Ave is in Markham, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.
How long has 313 Helen Ave been on the market?
388 days — 313 Helen Ave was listed on October 7, 2025.
What is the price per square foot of 313 Helen Ave?
About $1,625 to $2,167 per square foot: the asking price of $3,250,000 over the 1,500–2,000 sq ft the listing gives as its size range.
Does 313 Helen Ave have parking or a garage?
Yes — the listing gives 6 parking spaces. Garage: Yes.
