




471 Maple Avenue, Grimsby, ON
L3M 3C2
Listed October 29, 2026
About this property
Situated at the end of a cul-de-sac, Lakecourt Marine occupies a private waterfront setting with approximately 352 feet of Lake Ontario shoreline, 562 feet of Grimsby Harbour frontage, and expansive views across the lake. With its own harbour and two residences, the property offers a different perspective on waterfront ownership, shaped by the character of Grimsby's historic port.Spanning approximately 4.6 acres, three adjoining parcels are offered together as one waterfront property. A pre-war two-bedroom cottage bungalow with a detached garage and a three bedroom, two bathroom Viceroy-style raised bungalow provide two distinct residential spaces, alongside three accessory buildings and an established marina with capacity for approximately 60 boats. Whether envisioned as a private waterfront estate, a multi-generation family retreat, or a residence where waterfront living and boating coexist, the homes offer an immediate residential presence. The contrast between Lake Ontario's open waters and the sheltered harbour lends the property a character of its own, while the surrounding grounds leave room for it to evolve.With approximately 2.3 acres as developable land, municipal services in place, and a combination of Residential Detached 2 (RD2) and Marine Commercial (MC) zoning, the property offers flexibility for future use and development.Rooted in Grimsby's commercial fishing history and later evolving into a family-operated marina, Lakecourt remains one of the few privately owned marina properties along this stretch of Lake Ontario. Within reach of the Greater Toronto and Hamilton Area and Niagara's established wine and tourism region, its private harbour, substantial acreage, and established residential presence offer an opportunity to create a lasting waterfront legacy on a scale seldom found along Lake Ontario's shoreline.
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Cost of Ownership Calculator
What it could cost each month to own 471 Maple Avenue — mortgage, property taxes, fees, insurance, utilities and upkeep. Change any number to match your situation.
Your mortgage
$998,000 · Minimum $998,000
Use the rate your lender or broker quotes you.
Monthly costs
From the listing (2026 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
$29,865/mo
About $358,380 a year
- $22,072
- $3,180
- Home insurance$125
- Utilities$330
- Maintenance & repairs$4,158
Cash needed to close
- Down payment (20%)
- $998,000
- Ontario land transfer tax
- $111,225
- Legal fees, title insurance & inspectionEstimate
- $2,500
- Total
- $1,111,725
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
471 Maple Avenue, Grimsby, ON
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Last Updated: October 29, 2026
Listing Office: SOTHEBY'S INTERNATIONAL REALTY CANADA
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