121 Dorothy St is a 3-bedroom, 1-bathroom semi-detached home in St. Catharines, listed for $514,900. It has 700-1100 sq ft of living space.
1Located on a quiet street, this home is just minutes from schools, Elma Street Park, shopping, and convenient highway access.
2Offering 1,090 sq. ft. above grade plus an additional 427 sq. ft. of finished basement space, this home provides over 1,500 sq. ft. of functional living space.
3The backyard offers plenty of storage with two sheds.
3 Bed, 1 Bath Semi-Detached Home in St. Catharines
About 121 Dorothy Street
Welcome to this beautifully maintained semi-detached home nestled in one of St. Catharines' most established and family-friendly neighbourhoods in Lakeport. Located on a quiet street, this home is just minutes from schools, Elma Street Park, shopping, and convenient highway access. Offering 1,090 sq. ft. above grade plus an additional 427 sq. ft. of finished basement space, this home provides over 1,500 sq. ft. of functional living space. The bright main floor features a spacious living area that flows seamlessly into the all-white kitchen and dining area, as well as an additional all-season family room with an electric fireplace that opens onto the fully fenced backyard. The backyard offers plenty of storage with two sheds. Upstairs, you'll find three bedrooms, including a comfortable primary bedroom, along with a 4-piece bathroom. The finished basement provides versatile recreational space, perfect for a family room, playroom, or even a home gym. A dedicated laundry/utility room adds convenience, while the bathroom rough-in provides the opportunity to add a second bathroom in the future. With three bedrooms, generous living space, excellent storage, and a quiet location close to everyday amenities, this turnkey home offers a wonderful combination of comfort and functionality.
3 bedrooms, 1 bathroom, about 700 sq ft, works out to roughly $736 per square foot. Chat with Zara if you'd like a deeper read on whether this semi-detached fits your budget and timing.
Inside 121 Dorothy St
Every detail from the listing, in one place.
Type
Semi-Detached
Style
2-Storey
Living space
700-1100 sq ftas stated on the listing
Parking
2 spaces
Basement
Full, Finished
Features & systems
Parking & garage
Parking spaces
2
Interior
Basement
Full · Finished
Lot & land
Lot size (sqft)
0
Listing & possession
Property style
2-Storey
Property class
Semi-Detached
121 Dorothy 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
$2,530
/mo
based on the purchase price of $514,900
$102,980 cash
$411,920 financed
$346,945 total interest
Principal54%$411,920
Interest46%$346,945
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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Similar homes for sale nearby in St. Catharines
Other 2–3 bed homes for sale in St. Catharines around $515K.
Average days on market38Homes sold in about 38 days on average.
Sale-to-list ratio96.4%On average, homes sold below asking.
Active listings746Homes for sale here right now.
Median vs prior 90 days−0.4%Compared with Apr 28 – Jul 27, 2026: prices down.
Based on 574 sales from Jul 27 – Oct 25, 2026 (498 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.
121 Dorothy St is listed at $514,900 (MLS® X13752056). Summitly updates the price as soon as the MLS® record changes.
Is $514,900 a good price for 121 Dorothy St?
Summitly rates it Well Above Market: the asking price is 15% or more above Zara's estimate, an estimate built from recent sales in St. Catharines. 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 121 Dorothy St changed?
Yes — it was first listed at $524,900 and is now $514,900, a drop of $10,000 (1.9%).
How many bedrooms and bathrooms does 121 Dorothy St have?
121 Dorothy St has 3 bedrooms and 1 bathroom, with about 700–1,100 square feet of living space. It is a semi-detached home in St. Catharines.
Is 121 Dorothy St close to transit?
The nearest rapid-transit station is St. Catharines GO Station (Lakeshore West GO), about 4.0 km in a straight line. Distances are straight-line, not walking routes; check the transit agency for routes and schedules.
How much would the monthly mortgage be on 121 Dorothy St?
About $2,530 a month — principal and interest on $514,900 with 20% down ($102,980), 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 121 Dorothy St compare with other homes in St. Catharines?
Its asking price of $514,900 is about 6% below the median sold price in St. Catharines over the last 90 days, $549,550, across 574 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 121 Dorothy St been sold before?
Summitly has no earlier MLS® sale or lease of 121 Dorothy St on record from the last two years. Older records aren't shown under TRREB rules.
Where is 121 Dorothy St?
121 Dorothy St is in St. Catharines, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.
How long has 121 Dorothy St been on the market?
47 days — 121 Dorothy St was listed on September 8, 2026.
What is the price per square foot of 121 Dorothy St?
About $468 to $736 per square foot: the asking price of $514,900 over the 700–1,100 sq ft the listing gives as its size range.
