850 St Marys St is a 3-bedroom, 1-bathroom detached home in Peterborough, listed for $399,000. It has 700-1100 sq ft of living space.
1Visit the REALTOR website for further information about this listing.
2Quaint two-storey home with 3 + 1 bedrooms, full basement and backyard adjacent to a public park.
3Very convenient location within 100 ft. of two elementary schools, and within two blocks of the Walmart/Fresh-Co plaza, as well as Lansdowne St. with access to dozens of restaurants, services and public transportation.
Visit the REALTOR website for further information about this listing. Quaint two-storey home with 3 + 1 bedrooms, full basement and backyard adjacent to a public park. Very convenient location within 100 ft. of two elementary schools, and within two blocks of the Walmart/Fresh-Co plaza, as well as Lansdowne St. with access to dozens of restaurants, services and public transportation.
3 bedrooms, 1 bathroom, about 700 sq ft, works out to roughly $570 per square foot. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.
Inside 850 St Marys St
Every detail from the listing, in one place.
Type
Detached
Style
2-Storey
Living space
700-1100 sq ftas stated on the listing
Parking
2 spaces
Basement
Full, Partially Finished
Features & systems
Parking & garage
Parking spaces
2
Interior
Basement
Full · Partially Finished
Lot & land
Lot size (sqft)
0
Listing & possession
Property style
2-Storey
Property class
Detached
850 St Marys St 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
$1,960
/mo
based on the purchase price of $399,000
$79,800 cash
$319,200 financed
$268,850 total interest
Principal54%$319,200
Interest46%$268,850
20% down · 25-yr amortization · 5.50% rate. Principal & interest only — taxes, condo fees, and insurance not included.
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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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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 Peterborough
Other 2–5 bed homes for sale in Peterborough around $399K.
Average days on market36Homes sold in about 36 days on average.
Sale-to-list ratio97.2%On average, homes sold below asking.
Active listings383Homes for sale here right now.
Median vs prior 90 days+2.7%Compared with May 12 – Aug 10, 2026: prices up.
Based on 366 sales from Aug 10 – Nov 8, 2026 (342 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.
Questions About 850 St Marys St
How much is 850 St Marys St listed for?
850 St Marys St is listed at $399,000 (MLS® X13486106). Summitly updates the price as soon as the MLS® record changes.
Is $399,000 a good price for 850 St Marys St?
Summitly rates it Fair Price: the asking price is Within 3% below to 5% above Zara's estimate, an estimate built from recent sales in Peterborough. 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 850 St Marys St changed?
Yes — it was first listed at $450,000 and is now $399,000, a drop of $51,000 (11.3%).
How many bedrooms and bathrooms does 850 St Marys St have?
850 St Marys St has 3 bedrooms and 1 bathroom, with about 700–1,100 square feet of living space. It is a detached home in Peterborough.
How much would the monthly mortgage be on 850 St Marys St?
About $1,960 a month — principal and interest on $399,000 with 20% down ($79,800), 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 850 St Marys St compare with other homes in Peterborough?
Its asking price of $399,000 is about 29% below the median sold price in Peterborough over the last 90 days, $565,000, across 366 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 850 St Marys St been sold before?
Summitly has no earlier MLS® sale or lease of 850 St Marys St on record from the last two years. Older records aren't shown under TRREB rules.
Where is 850 St Marys St?
850 St Marys St is in Peterborough, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.
How long has 850 St Marys St been on the market?
137 days — 850 St Marys St was listed on June 24, 2026.
What is the price per square foot of 850 St Marys St?
About $363 to $570 per square foot: the asking price of $399,000 over the 700–1,100 sq ft the listing gives as its size range.
Does 850 St Marys St have parking or a garage?
Yes — the listing gives 2 parking spaces.
Does 850 St Marys St have a basement, and is it finished?
The listing describes the basement as: Full, Partially Finished.