For sale

DetachedOn market 24 daysPrice drop · $64,900 off (-14.8%)

408 12th Line, Plummer Additional

Name: 408 12th Line
SKU: X13888442
Price: 375000 CAD
Availability: InStock

Plummer Additional, ON · MLS® X13888442Updated September 29, 2026

$375,000Est. $1,842/mo mortgage

Bedrooms: 3
Bathrooms: 1
Living space: < 700sq ft

Type Detached
Lot 50 acres
Basement Crawl Space

What you should know

408 12th Line is a 3-bedroom, 1-bathroom detached home in Plummer Additional, listed for $375,000. It has < 700 sq ft of living space.

Welcome to this charming three-bedroom waterfront cottage on beautiful Rock Lake, offering stunning views and an inviting setting to relax, unwind, and enjoy the best of cottage living.
The spacious wood deck provides the perfect place to enjoy your morning coffee while taking in the picturesque waterfront and surrounding natural beauty.
Book your private showing today!

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3 Bed, 1 Bath Detached Home in Plummer Additional

About 408 12th Line

Welcome to this charming three-bedroom waterfront cottage on beautiful Rock Lake, offering stunning views and an inviting setting to relax, unwind, and enjoy the best of cottage living. The spacious wood deck provides the perfect place to enjoy your morning coffee while taking in the picturesque waterfront and surrounding natural beauty. Spend your days swimming, boating, kayaking, hiking, fishing, and exploring the outdoors, with a public boat launch and beach conveniently located nearby. The cottage has been thoughtfully maintained and features numerous recent updates, including a new heat pump installed in March 2026, new shallow well pump and septic pump in 2026, a 16- foot front staircase and new 40-gallon hot water heater in 2024, and a new storm door in 2024. Additional features include a newer septic system and a generous 12’ x 16’ storage shed, ideal for storing recreational equipment and outdoor essentials. This is a wonderful opportunity to own a peaceful lakeside retreat and enjoy the relaxed lifestyle Rock Lake has to offer. Book your private showing today!

3 bedrooms, 1 bathroom, about 700 sq ft, works out to roughly $536 per square foot. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.

Inside 408 12th Line

Every detail from the listing, in one place.

Type: Detached
Style: Bungalow
Living space: < 700 sq ftas stated on the listing
Basement: Crawl Space

Features & systems

Interior

Basement: Crawl Space

Lot & land

Lot size (sqft): 0.29

Listing & possession

Property style: Bungalow
Property class: Detached

408 12th Line Price & Sale History

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

—ReducedPrice reducedThis listingMLS® X13888442−$64,900 (14.8%)$375,000
Sep 18, 2026For saleListedThis listingMLS® X13888442$439,900

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

What's it worth?

How 408 12th Line Compares to the Plummer Additional Market

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

Zara’s estimate

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Living in Plummer Additional: Location & Amenities

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Costs, Mortgage & Rental Return for 408 12th Line

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

Mortgage: $1,842; 20% down · 25 years · 5.5% assumed
Property tax: $206; 0.66% mill rate · ON
Total per month: $2,048; 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

$1,842

/mo

based on the purchase price of $375,000

Down payment20%

$75,000 cash

Amortization25 yr

$300,000 financed

Rate5.50%

$252,679 total interest

Principal54%$300,000

Interest46%$252,679

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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MLS® X13888442 · Listing data last updated September 29, 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 Sep 17· $536/sq ft

Estimated monthly mortgage$1,842/moMortgage only · 20% down · 5.5% assumed

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