18 Tweedsmuir Ave is a 5-bedroom, 2-bathroom detached home in Sarnia, listed for $449,000. It has 700-1100 sq ft of living space.
1THE Fully finished basement features a private 2-bedroom apartment with its own kitchen and living space, offering an ideal mortgage helper or income opportunity.
2Located close to schools, shopping, and all amenities, this home blends comfort and practicality.
3Enjoy the large, fenced oversized yard with deck, pergola, room for a pool and two sheds - perfect for family living or tenant use.
THIS 3+2 BEDROOM, 2 Full bath bungalow is perfect for a young family or investor. THE Fully finished basement features a private 2-bedroom apartment with its own kitchen and living space, offering an ideal mortgage helper or income opportunity. Located close to schools, shopping, and all amenities, this home blends comfort and practicality. Enjoy the large, fenced oversized yard with deck, pergola, room for a pool and two sheds - perfect for family living or tenant use. Recent updates include main floor bedroom windows (2018), basement windows (2016), front deck (2016), and basement finishing by advanced basements (2016). HOT Water tank isrented. A Versatile property with strong potential for family living and rental income!
5 bedrooms, 2 bathrooms, about 700 sq ft, works out to roughly $641 per square foot. Chat with Zara if you'd like a deeper read on whether this detached fits your budget and timing.
Inside 18 Tweedsmuir Ave
Every detail from the listing, in one place.
Type
Detached
Style
Bungalow
Living space
700-1100 sq ftas stated on the listing
Parking
2 spaces
Basement
Apartment, Finished with Walk-Out
Features & systems
Parking & garage
Parking spaces
2
Interior
Basement
Apartment · Finished with Walk-Out
Lot & land
Lot size (sqft)
0
Listing & possession
Property style
Bungalow
Property class
Detached
18 Tweedsmuir Ave Price & Sale History
Earlier listings of this property, list-price changes, and the most recent annual property tax on the listing.
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
$2,206
/mo
based on the purchase price of $449,000
$89,800 cash
$359,200 financed
$302,541 total interest
Principal54%$359,200
Interest46%$302,541
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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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 Sarnia
Other 4-bed homes for sale in Sarnia around $449K.
Average days on market31Homes sold in about 31 days on average.
Sale-to-list ratio97.3%On average, homes sold below asking.
Active listings64Homes for sale here right now.
Median vs prior 90 days−6.2%Compared with May 11 – Aug 9, 2026: prices down.
Based on 19 sales from Aug 9 – Nov 7, 2026 (28 in the prior 90 days). Aggregate MLS® figures for closed sales; individual sold prices are shown only to signed-in members.
Questions About 18 Tweedsmuir Ave
How much is 18 Tweedsmuir Ave listed for?
18 Tweedsmuir Ave is listed at $449,000 (MLS® X12986106). Summitly updates the price as soon as the MLS® record changes.
Is $449,000 a good price for 18 Tweedsmuir Ave?
Summitly rates it Well Above Market: the asking price is 15% or more above Zara's estimate, an estimate built from recent sales in Sarnia. 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 18 Tweedsmuir Ave changed?
Yes — it was first listed at $469,900 and is now $449,000, a drop of $20,900 (4.4%).
How many bedrooms and bathrooms does 18 Tweedsmuir Ave have?
18 Tweedsmuir Ave has 5 bedrooms and 2 bathrooms, with about 700–1,100 square feet of living space. It is a detached home in Sarnia.
How much would the monthly mortgage be on 18 Tweedsmuir Ave?
About $2,206 a month — principal and interest on $449,000 with 20% down ($89,800), 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 18 Tweedsmuir Ave compare with other homes in Sarnia?
Its asking price of $449,000 is about 12% above the median sold price in Sarnia over the last 90 days, $400,000, across 19 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 18 Tweedsmuir Ave been sold before?
Summitly has no earlier MLS® sale or lease of 18 Tweedsmuir Ave on record from the last two years. Older records aren't shown under TRREB rules.
Where is 18 Tweedsmuir Ave?
18 Tweedsmuir Ave is in Sarnia, ON. Schools, transit, parks and shops nearby are under Location & lifestyle on this page.
How long has 18 Tweedsmuir Ave been on the market?
216 days — 18 Tweedsmuir Ave was listed on April 5, 2026.
What is the price per square foot of 18 Tweedsmuir Ave?
About $408 to $641 per square foot: the asking price of $449,000 over the 700–1,100 sq ft the listing gives as its size range.
Does 18 Tweedsmuir Ave have parking or a garage?
Yes — the listing gives 2 parking spaces.
Does 18 Tweedsmuir Ave have a basement, and is it finished?
The listing describes the basement as: Apartment, Finished with Walk-Out.