DetachedOn market 107 days

260 Ontario St, Lambton Shores

Name: 260 Ontario Street
SKU: X13529760
Price: 4500000 CAD
Availability: InStock

Lambton Shores, ON · · MLS® X13529760Updated October 20, 2026

$4,500,000Est. $22,107/mo mortgage

Bedrooms: 3
Bathrooms: 5
Living space: 5000 +sq ft
Parking spaces: 15

Type Detached
Lot 3.495 acres
Garage Yes
Basement Finished with Walk-Out, Full

What you should know

260 Ontario St is a 3-bedroom, 5-bathroom detached home in Lambton Shores, listed for $4,500,000. It has 5000 + sq ft of living space.

The showpiece is the 4-season sunroom, a full "home within a home," featuring a built-in swim spa pool, the largest custom skylights available, & exclusive roll-up screens unseen in any other residence in the region.
The craftsmanship is staggering: mahogany & poplar millwork, European archways, & centuries-old imported hardwood from a French castle custom-finished for the grand entry!
The entire main & lower level floors are heated along with the garage, which is a car collector's dream offering 5 bay doors & floor space for 6 cars + storage.

Ask Zara:

3 Bed, 5 Bath Detached Home in Lambton Shores

About 260 Ontario Street

ONE OF A KIND WATERFRONT LUXURY | UNMATCHED SCALE & PRESTIGE | 9441 SQ FT OF PURE 2023 EXCELLENCE - Welcome to the most extraordinary custom waterfront estate ever offered in Grand Bend: a next-level masterpiece sitting on 3 acres w/ over 177 ft of peaceful Ausable River frontage. This is ultra-premium living for upper-tier buyers who demand a home that simply doesn't exist anywhere else. Inside this 9441 SQ FT architectural triumph, every inch is finished at a standard beyond premium. The showpiece is the 4-season sunroom, a full "home within a home," featuring a built-in swim spa pool, the largest custom skylights available, & exclusive roll-up screens unseen in any other residence in the region. With 6 bedrooms, including a magazine-worthy primary suite + dressing room, 6 jaw-dropping bathrooms, multiple offices/work-from-home zones, 2 laundries, & a dedicated fitness/art studio, the lifestyle offering is limitless. The chef's kitchen is fully loaded & seamlessly connects to a butler's pantry/2nd kitchen boasting a serving window to the sunroom - an entertainer's paradise! The craftsmanship is staggering: mahogany & poplar millwork, European archways, & centuries-old imported hardwood from a French castle custom-finished for the grand entry! The entire main & lower level floors are heated along with the garage, which is a car collector's dream offering 5 bay doors & floor space for 6 cars + storage. A double-deep RV/boat bay in the garage leads to a on site private boat launch adjacent to 50 ft of private dockage already in place + ample space to grow for larger boats or additional watercrafts. With the extremely private 3 acres, there is an abundance of land for a large hobbyist shop or development potential near the road for an additional lots. This is a one-of-one luxury estate in a class of its own in Grand Bend, Ontario's fastest growing year round beach community. Qualify with a Realtor to experience the full details of this once-in-a-lifetime offering.

3 bedrooms, 5 bathrooms, about 5,000 sq ft, works out to roughly $900 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 260 Ontario St

Every detail from the listing, in one place.

Type: Detached
Style: 2-Storey
Living space: 5000 + sq ftas stated on the listing
Parking: 15 spacesYes garage
Basement: Finished with Walk-Out, Full

Features & systems

Parking & garage

Garage: Yes
Parking spaces: 15

Interior

Basement: Finished with Walk-Out · Full

Exterior & construction

Pool: Yes

Lot & land

Lot size (sqft): 2.6

Listing & possession

Property style: 2-Storey
Property class: Detached

260 Ontario St Price & Sale History

Earlier listings of this property, list-price changes, and the most recent annual property tax on the listing.

Jul 6, 2026For saleListedThis listingMLS® X13529760$4,500,000

Sourced from MLS®. Includes earlier listings of this property on record.

What's it worth?

How 260 Ontario St Compares to the Lambton Shores Market

Zara compares it with recent sales of similar homes nearby. It's a guide, not an appraisal.

Zara’s estimate

Well Above Market· based on 129 recent sales

Value your own home →How accurate are Zara’s estimates?

Summitly estimate, not from TRREB, the MLS® or the listing brokerage. Not an appraisal. How it works

Lambton Shores market, last 90 days

Median sold price: $727,000
Average sold price: $815,443
Average days on market: 58
Homes sold: 82

Closed sales on the TRREB MLS®.

Full Lambton Shores market report

Recently sold nearby in Lambton Shores

Sold prices are shown free to signed-in members, as board rules require.

6 nearby sales vs. this home

Closed sales from MLS®, compared with this home's asking price.

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Home	Sold price	$ / sqft	% of asking	Sold
This home260 Ontario Street 3 bd · 5 ba · 5,000 sqft	$4,500,000asking	$900	—	—
10 Eureka Street 3 bd · 2 ba · 1,500 sqft
191 ELIZABETH Street 2 bd · 1 ba · 1,100 sqft
5267 Cliff Road 3 bd · 2 ba · 2,000 sqft
13 Warwick Avenue 2 bd · 2 ba · 700 sqft
27 Oak Street 3 bd · 1 ba · 700 sqft
5 Union Street 5 bd · 3 ba · 2,000 sqft

10 Eureka Street
3 bd · 2 ba · 1,500 sqft
191 ELIZABETH Street
2 bd · 1 ba · 1,100 sqft
5267 Cliff Road
3 bd · 2 ba · 2,000 sqft
13 Warwick Avenue
2 bd · 2 ba · 700 sqft
27 Oak Street
3 bd · 1 ba · 700 sqft
5 Union Street
5 bd · 3 ba · 2,000 sqft

Living in Lambton Shores: Location & Amenities

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Costs, Mortgage & Rental Return for 260 Ontario St

What it could cost each month, today's rates from our mortgage partner, and what it could return as a rental.

Mortgage: $22,107; 20% down · 25 years · 5.5% assumed
Property tax: $2,475; 0.66% mill rate · ON
Total per month: $24,582; Before utilities, insurance and fees

Figures are Summitly estimates for illustration only — not from TRREB or the MLS® feed, and not a mortgage approval, appraisal, or financial advice.

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Monthly cost

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Down payment

Rate (%)

Years

An estimate, not a quote. Utilities and insurance are extra.

Affordability calculator

Estimated monthly payment

$22,107

/mo

based on the purchase price of $4,500,000

Down payment20%

$900,000 cash

Amortization25 yr

$3,600,000 financed

Rate5.50%

$3,032,145 total interest

Principal54%$3,600,000

Interest46%$3,032,145

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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Listing brokerage: ROYAL LEPAGE TRILAND REALTY, BrokerageMLS® X13529760 · Listing data last updated October 20, 2026

Listing data comes from the Toronto Regional Real Estate Board (TRREB) and is deemed reliable but not guaranteed. Shown on Summitly by Coldwell Banker Summit Realty, Brokerage, which is not the listing brokerage. The information provided herein must only be used by consumers that have a bona fide interest in the purchase, sale, or lease of real estate and may not be used for any commercial purpose or any other purpose. © 2026 Toronto Regional Real Estate Board. All rights reserved.

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.

For sale· listed Jul 5· $900/sq ft

Estimated monthly mortgage$22,107/moMortgage only · 20% down · 5.5% assumed

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5.0 · Google rating for Coldwell Banker Summit Realty, Brokerage · as of September 2026

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