311 Helen Ave, Markham

Name: 311 Helen Avenue
SKU: N13424448
Price: 3295000 CAD
Availability: InStock

4 Bed, 3 Bath Detached Home in Markham

About 311 Helen Avenue

Perfect Residential Infill Redevelopment Opportunity for Townhouse or Single Family Homes. +202 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 form. Property may be combined with 313 Helen Ave to create +400 ft frontage and 1.33 acres in area allowing for substantial infill opportunity. *(Legal Description continued) PART 1, 65R33761 Save and except pts 1 & 3, 65r34549 city of markham

4 bedrooms, 3 bathrooms, about 2,000 sq ft, works out to roughly $1,648 per square foot. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.

Inside 311 Helen Ave

Every detail from the listing, in one place.

Type: Detached
Style: Backsplit 4
Living space: 2000-2500 sq ftas stated on the listing
Parking: 8 spacesYes garage
Basement: Separate Entrance, Unfinished

Features & systems

Parking & garage

Garage: Yes
Parking spaces: 8

Interior

Basement: Separate Entrance · Unfinished

Lot & land

Lot size (sqft): 0

Listing & possession

Property style: Backsplit 4
Property class: Detached

311 Helen Ave Price & Sale History

Earlier listings of this property, list-price changes, and the most recent annual property tax on the listing.

—ReducedPrice reducedThis listingMLS® N13424448−$500,000 (13.2%)$3,295,000
Jun 10, 2026For saleListedThis listingMLS® N13424448$3,795,000
LeasedPreviously listedMLS® N12317141View listing (opens in a new tab)

See what it sold for, free. Board rules need a free account before we can show sold and past prices.

Sourced from MLS®. Includes earlier listings of this property on record.

What's it worth?

How 311 Helen Ave Compares to the Markham Market

Zara compares it with recent sales of similar homes nearby. It's a guide, not an appraisal.

Zara’s estimate

Well Above Market· based on 2,147 recent sales

Value your own home →How accurate are Zara’s estimates?

Summitly estimate, not from TRREB, the MLS® or the listing brokerage. Not an appraisal. How it works

Markham market, last 90 days

Median sold price: $1,090,000
Average sold price: $1,172,153
Average days on market: 31
Homes sold: 1,252

Closed sales on the TRREB MLS®.

Full Markham market report

Market pulse · Markham

Markham market

Median sold price$1,090,000Last 90 days
Average days on market31Homes sold in about 31 days on average.
Sale-to-list ratio99.3%On average, homes sold below asking.
Active listings1,501Homes for sale here right now.
Median vs prior 90 days+0.5%Compared with May 9 – Aug 7, 2026: prices up.

Based on 1,252 sales from Aug 7 – Nov 5, 2026 (877 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.

Recently sold nearby in Markham

Sold prices are shown free to signed-in members, as board rules require.

6 nearby sales vs. this home

Closed sales from MLS®, compared with this home's asking price.

See what these homes actually sold for

Free with a Summitly account. Sign in once and sold prices unlock across the site.

Home	Sold price	$ / sqft	% of asking	Sold
This home311 Helen Avenue 4 bd · 3 ba · 2,000 sqft	$3,295,000asking	$1,648	—	—
54 Senator Reesor's Drive 4 bd · 4 ba · 2,000 sqft
81 Prince Of Wales Drive 4 bd · 4 ba · 2,500 sqft
70 MURISON Drive 4 bd · 5 ba · 3,500 sqft
186 Carlton Road 4 bd · 2 ba · 2,500 sqft
20 Harness Circle 3 bd · 3 ba · 1,500 sqft
30 Garnish Green N/A 4 bd · 2 ba · 2,000 sqft

54 Senator Reesor's Drive
4 bd · 4 ba · 2,000 sqft
81 Prince Of Wales Drive
4 bd · 4 ba · 2,500 sqft
70 MURISON Drive
4 bd · 5 ba · 3,500 sqft
186 Carlton Road
4 bd · 2 ba · 2,500 sqft
20 Harness Circle
3 bd · 3 ba · 1,500 sqft
30 Garnish Green N/A
4 bd · 2 ba · 2,000 sqft

Living in Markham: Location & Amenities

Transit, schools, parks and everyday places near this home. Select any place to open it on Google Maps.

Transit nearby

Stations and stops, straight-line distance

Unionville GO StationStouffville GO1.5 km19 min walk
Centennial GO StationStouffville GO2.1 km
Milliken GO StationStouffville GO3.6 km

Places from OpenStreetMap (© OpenStreetMap contributors) and Summitly's station list. Distances are straight-line, not routes.

Loading schools, parks, groceries and more nearby…

Transit

Unionville GO Station (Stouffville GO)19 min walk
Centennial GO Station (Stouffville GO)2.1 km
Milliken GO Station (Stouffville GO)3.6 km

Nearest subway, GO and LRT stations first, then bus and streetcar stops.

Unionville GO Station
1.5 km19 minClosest· Stouffville GO
Homes near Unionville GO Station
Centennial GO Station
2.1 km· Stouffville GO
Homes near Centennial GO Station
Milliken GO Station
3.6 km· Stouffville GO
Homes near Milliken GO Station

Straight-line distances from the listing; walking times assume about 80 m a minute. Places © OpenStreetMap contributors, a community-maintained map that may miss or misplace some places. Directions and place details open on Google Maps.

How long is your commute?

From 311 Helen Ave. Typical times without traffic delays; transit times aren't available yet.

Costs, Mortgage & Rental Return for 311 Helen Ave

What it could cost each month, today's rates from our mortgage partner, and what it could return as a rental.

Mortgage: $16,187; 20% down · 25 years · 5.5% assumed
Property tax: $1,812; 0.66% mill rate · ON
Total per month: $17,999; Before utilities, insurance and fees

Figures are Summitly estimates for illustration only — not from TRREB or the MLS® feed, and not a mortgage approval, appraisal, or financial advice.

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Monthly cost

Enter a rate to see the monthly cost

Down payment

Rate (%)

Years

An estimate, not a quote. Utilities and insurance are extra.

Affordability calculator

Estimated monthly payment

$16,187

/mo

based on the purchase price of $3,295,000

Down payment20%

$659,000 cash

Amortization25 yr

$2,636,000 financed

Rate5.50%

$2,220,204 total interest

Principal54%$2,636,000

Interest46%$2,220,204

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.

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Questions About 311 Helen Ave

How much is 311 Helen Ave listed for?

311 Helen Ave is listed at $3,295,000 (MLS® N13424448). Summitly updates the price as soon as the MLS® record changes.

Is $3,295,000 a good price for 311 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 311 Helen Ave changed?

Yes — it was first listed at $3,795,000 and is now $3,295,000, a drop of $500,000 (13.2%).

How many bedrooms and bathrooms does 311 Helen Ave have?

311 Helen Ave has 4 bedrooms and 3 bathrooms, with about 2,000–2,500 square feet of living space. It is a detached home in Markham.

Is 311 Helen Ave close to transit?

The nearest rapid-transit station is Unionville GO Station (Stouffville GO), about 1.5 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 311 Helen Ave?

About $16,187 a month — principal and interest on $3,295,000 with 20% down ($659,000), 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 311 Helen Ave compare with other homes in Markham?

Its asking price of $3,295,000 is about 202% above the median sold price in Markham over the last 90 days, $1,090,000, across 1,252 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 311 Helen Ave been sold before?

Yes — Summitly has 1 earlier MLS® listing of 311 Helen Ave on record. Their prices and dates are shown to signed-in members under TRREB rules: sign in free to see them in the Listing history above.

Where is 311 Helen Ave?

311 Helen Ave is in Markham, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.

How long has 311 Helen Ave been on the market?

148 days — 311 Helen Ave was listed on June 10, 2026.

What is the price per square foot of 311 Helen Ave?

About $1,318 to $1,648 per square foot: the asking price of $3,295,000 over the 2,000–2,500 sq ft the listing gives as its size range.

Does 311 Helen Ave have parking or a garage?

Yes — the listing gives 8 parking spaces. Garage: Yes.

What you should know

4 Bed, 3 Bath Detached Home in Markham

About 311 Helen Avenue

Inside 311 Helen Ave

Features & systems

311 Helen Ave Price & Sale History

How 311 Helen Ave Compares to the Markham Market

Markham market, last 90 days

Recently sold nearby in Markham

Living in Markham: Location & Amenities

How long is your commute?

Costs, Mortgage & Rental Return for 311 Helen Ave

Monthly cost of owning

Mortgage payments

Monthly cost

Rental income potential

Own a home on Helen Avenue? See what yours is worth

Zara, any time

A licensed local agent

See 311 Helen Ave, Markham in person

Similar homes for sale nearby in Markham

Explore More Detached Homes in Markham

4 Bed, 3 Bath Detached Home in Markham

About 311 Helen Avenue

Inside 311 Helen Ave

Features & systems

311 Helen Ave Price & Sale History

How 311 Helen Ave Compares to the Markham Market

Markham market, last 90 days

Market pulse · Markham

Recently sold nearby in Markham

Living in Markham: Location & Amenities

Transit nearby

Transit

How long is your commute?

Costs, Mortgage & Rental Return for 311 Helen Ave

Monthly cost of owning

Mortgage payments

Monthly cost

Rental income potential

Own a home on Helen Avenue? See what yours is worth

Zara, any time

A licensed local agent

See 311 Helen Ave, Markham in person

Questions About 311 Helen Ave

How much is 311 Helen Ave listed for?

Is $3,295,000 a good price for 311 Helen Ave?

Has the price of 311 Helen Ave changed?

How many bedrooms and bathrooms does 311 Helen Ave have?

Is 311 Helen Ave close to transit?

How much would the monthly mortgage be on 311 Helen Ave?

How does 311 Helen Ave compare with other homes in Markham?

Has 311 Helen Ave been sold before?

Where is 311 Helen Ave?

How long has 311 Helen Ave been on the market?

What is the price per square foot of 311 Helen Ave?

Does 311 Helen Ave have parking or a garage?

Similar homes for sale nearby in Markham

Explore More Detached Homes in Markham

Market pulse · Markham

Transit nearby

Transit

Questions About 311 Helen Ave

How much is 311 Helen Ave listed for?

Is $3,295,000 a good price for 311 Helen Ave?

Has the price of 311 Helen Ave changed?

How many bedrooms and bathrooms does 311 Helen Ave have?

Is 311 Helen Ave close to transit?

How much would the monthly mortgage be on 311 Helen Ave?

How does 311 Helen Ave compare with other homes in Markham?

Has 311 Helen Ave been sold before?

Where is 311 Helen Ave?

How long has 311 Helen Ave been on the market?

What is the price per square foot of 311 Helen Ave?

Does 311 Helen Ave have parking or a garage?