




105 Marsdale Drive, St. Catharines, ON
L2T 3T3
Listed September 11, 2026
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About this property
Architecturally relevant and thoughtfully reimagined, 105 Marsdale Drive is an inspiring mid-century modern "Butterfly Roof" bungalow, offering nearly 3,000 sq ft of main-level living in one of South St. Catharines' most highly sought-after neighbourhoods. Originally designed in 1958 by Massey Award-winning architect James E. Secord, with a later addition influenced by renowned architect Ron Thom, this home blends preserved architectural character with modern updates. Features include floor-to-ceiling glass, clean horizontal lines, custom rosewood built-ins, and four fireplaces (3 wood-burning, 1 gas). The open-concept layout flows seamlessly through the living, dining, and kitchen areas, creating an ideal space for both everyday living and entertaining. The private backyard oasis is a standout feature, professionally landscaped and designed for resort-style living. Highlights include a Swenker concrete pool, hot tub, outdoor BBQ kitchen, pool change room, low-voltage landscape lighting, and a programmable in-ground sprinkler system. The fully finished lower level offers a self-contained suite with a separate entrance, two bedrooms, a full kitchen, spacious living areas, and a full bathroom - ideal for multigenerational living, growing teenagers, guests, or a nanny/in-law setup. Additional features include an original indoor cedar-lined sauna with shower, extensive storage, cedar-lined closets, and mature award-winning landscaped gardens providing exceptional privacy. This year, the home was recognized by the Niagara Architectural Society, celebrating its architectural history and significance. Located just steps from the Niagara Escarpment, Bruce Trail, Ridley College, the Pen Centre, and some of Niagara's top wineries and Michelin star restaurants. A rare opportunity to own an architecturally significant mid-century modern home with exceptional lifestyle flexibility in a prime location.
Features
Property Details
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Taxes & Financials
Cost of Ownership Calculator
What it could cost each month to own 105 Marsdale Drive — mortgage, property taxes, fees, insurance, utilities and upkeep. Change any number to match your situation.
Your mortgage
$379,760 · Minimum $379,760
Use the rate your lender or broker quotes you.
Monthly costs
From the listing (2025 tax bill).
Leave at $0 if there isn't one.
Typical for this kind of home.
Hydro, heating, water and sewer.
About 1% of the price a year, set aside.
One-time costs
A typical estimate — your lawyer will confirm.
Estimated monthly cost of ownership
$11,460/mo
About $137,520 a year
- $8,399
- $1,024
- Home insurance$125
- Utilities$330
- Maintenance & repairs$1,582
Cash needed to close
- Down payment (20%)
- $379,760
- Ontario land transfer tax
- $34,451
- Legal fees, title insurance & inspectionEstimate
- $2,500
- Total
- $416,711
Estimates only — not a mortgage approval, quote or tax advice. Payments assume a fixed rate compounded semi-annually; minimum down payments, mortgage insurance and land transfer tax follow current CMHC and Ontario rules. Insurance, utilities and upkeep are typical figures for the area. Your lender, lawyer and insurer will confirm your exact costs.
Location & Walkability
105 Marsdale Drive, St. Catharines, ON
Map data © GoogleOpen in Google Maps ↗
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100 Marsdale Drive
Last Updated: September 11, 2026
Listing Office: SOTHEBY'S INTERNATIONAL REALTY CANADA
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