A truly one-of-a-kind offering in the highly sought-after Grapeview neighbourhood! This rare property features two semi-detached split level homes under one ownership, creating an exceptional opportunity for multi-generational living, extended families, or those seeking a unique and versatile living arrangement. Together, the homes offer 4 bedrooms plus 2 dedicated dens/offices, skylights in B, solatubes in A, 2 family rooms and 4 full bathrooms(one with a skylight), providing generous space and flexibility for today's lifestyles. Situated on a corner lot each residence enjoys its own private entrances facing 2 different streets & each having a separate driveway, and attached garages (a single & a 1 1/2 car), allowing for independence while remaining conveniently connected. Another bonus is the shared inground pool (4 1/2' deep - no deep end) with pergola, outside lower level walk out close to washroom access, 2 large sheds, combination privacy fencing & iron fencing all surrounded by a lush mature landscape. Ideally located, you'll be just minutes from excellent schools, parks, highway access, major shopping, and the hospital. Enjoy the best of both worlds with nearby roadside markets offering fresh local produce, while still being close to every urban convenience. Properties with this distinctive configuration are exceptionally rare. Whether you're accommodating multiple generations under one ownership or simply looking for a home that offers unmatched flexibility, this is a unique opportunity you won't want to miss.
4 bedrooms, 4 bathrooms, about 2,000 sq ft, works out to roughly $500 per square foot, the bed-to-bath ratio is generous. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.
Inside 123 A&B First Street Louth
Every detail from the listing, in one place.
Type
Detached
Style
Sidesplit 4
Living space
2000-2500 sq ftas stated on the listing
Parking
6 spacesYes garage
Basement
Finished with Walk-Out
Features & systems
Parking & garage
Garage
Yes
Parking spaces
6
Interior
Basement
Finished with Walk-Out
Exterior & construction
Pool
Yes
Lot & land
Lot size (sqft)
0
Listing & possession
Property style
Sidesplit 4
Property class
Detached
123 A&B First Street Louth Price & Sale History
Earlier listings of this property, list-price changes, and the most recent annual property tax on the listing.
For saleListedThis listingMLS® X14104904$999,900
Sourced from MLS®. Includes earlier listings of this property on record.
What's it worth?
How 123 A&B First Street Louth Compares to the St. Catharines Market
Zara compares it with recent sales of similar homes nearby. It's a guide, not an appraisal.
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
$4,912
/mo
based on the purchase price of $999,900
$199,980 cash
$799,920 financed
$673,743 total interest
Principal54%$799,920
Interest46%$673,743
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.
For homeowners nearby
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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 St. Catharines
Other 3–6 bed homes for sale in St. Catharines around $1000K.
Average days on market38Homes sold in about 38 days on average.
Sale-to-list ratio96.5%On average, homes sold below asking.
Active listings757Homes for sale here right now.
Median vs prior 90 days0.0%Compared with Apr 25 – Jul 24, 2026.
Based on 564 sales from Jul 24 – Oct 22, 2026 (502 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.
How much is 123 A&B First Street Louth listed for?
123 A&B First Street Louth is listed at $999,900 (MLS® X14104904). Summitly updates the price as soon as the MLS® record changes.
Is $999,900 a good price for 123 A&B First Street Louth?
Summitly rates it Excellent Deal: the asking price is 10% or more below 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 123 A&B First Street Louth changed?
No — 123 A&B First Street Louth is still listed at its original asking price of $999,900.
How many bedrooms and bathrooms does 123 A&B First Street Louth have?
123 A&B First Street Louth has 4 bedrooms and 4 bathrooms, with about 2,000–2,500 square feet of living space. It is a detached home in St. Catharines.
Is 123 A&B First Street Louth close to transit?
The nearest rapid-transit station is St. Catharines GO Station (Lakeshore West GO), about 2.5 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 123 A&B First Street Louth?
About $4,912 a month — principal and interest on $999,900 with 20% down ($199,980), 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 123 A&B First Street Louth compare with other homes in St. Catharines?
Its asking price of $999,900 is about 82% above the median sold price in St. Catharines over the last 90 days, $550,000, across 564 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 123 A&B First Street Louth been sold before?
Summitly has no earlier MLS® sale or lease of 123 A&B First Street Louth on record from the last two years. Older records aren't shown under TRREB rules.
Where is 123 A&B First Street Louth?
123 A&B First Street Louth is in St. Catharines, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.
How long has 123 A&B First Street Louth been on the market?
1 day — 123 A&B First Street Louth was listed on October 21, 2026.
What is the price per square foot of 123 A&B First Street Louth?
About $400 to $500 per square foot: the asking price of $999,900 over the 2,000–2,500 sq ft the listing gives as its size range.
Does 123 A&B First Street Louth have parking or a garage?
Yes — the listing gives 6 parking spaces. Garage: Yes.
