
78 William Street W
Waterloo, ON N2L 1J7
- 5Bedrooms
- 2Bathrooms
- 1Garage
- 2500–3000Sq Ft
- $9,261Tax
- 66×329 ftLot Size
- Estimated Value:$1,483,750See Free Estimate Report

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Free Home EvaluationHow Much Is My Home Worth?Homes for Sale NearbySale & Price History for 78 William Street W, Waterloo
| Start Date | End Date | Price | Event | MLS# |
|---|---|---|---|---|
| 2026-03-09 | 2026-03-25 | Login to See Prices | Sold | x12862388 |
| 2026-01-20 | 2026-03-09 | Login to See Prices | Terminated | x12712986 |
| 2025-10-23 | 2026-01-19 | Login to See Prices | Expired | x12479013 |
| 2025-08-25 | 2025-10-23 | Login to See Prices | Terminated | x12362824 |
| 2025-05-13 | 2025-08-21 | Login to See Prices | Terminated | x12144851 |
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*Sold prices and complete sale & price history are regulated data. Under the Trust in Real Estate Services Act, 2002 (TRESA) and the rules of the Real Estate Council of Ontario (RECO), and pursuant to the Multiple Listing Service® rules of the Canadian Real Estate Association (CREA) and the Toronto Regional Real Estate Board (TRREB), this information may be shown only to registered users who have agreed to the applicable terms of use (a Virtual Office Website, or "VOW," arrangement). HOMEH Inc., Brokerage therefore provides it to signed-in members only. Creating an account is free and takes under a minute.
About 78 William Street W, Waterloo
Summarized Description
- Stately 5-bedroom home in Westmount neighborhood
- Half-acre lot with development potential
- Historic charm with modern updates
- Original marble fireplaces enhance elegance
- Bright kitchen with ample storage
- Zoning allows for three additional dwelling units
- Close to Uptown conveniences and new LRT
- Expansive backyard with mature trees
HALF AN ACRE IN UPTOWN WATERLOO! Live grand, sever the lot, or explore development potential. Welcome to 78 William St W, a stately and elegant 5- bedroom home in Waterloo's coveted Westmount neighborhood, just two blocks from Uptown conveniences and the Region's new LRT. Thoughtfully updated while retaining its original character, the home features gracious principal rooms ideal for both everyday living and entertaining. The spacious living and dining areas flow seamlessly, enhanced by large bay windows that flood the space with natural light and showcase beautiful architectural details - including original marble fireplaces that add timeless sophistication. The bright, functional kitchen offers ample storage and prep space, while the adjacent sunroom overlooks the expansive backyard and gardens-a peaceful spot for morning coffee or unwinding at the end of the day. Upstairs, you'll find five generously sized bedrooms, each with ample closet space, providing comfort and flexibility for families, guests, or work-from-home needs. Outside, the half-acre lot is a true highlight-offering privacy, mature trees, and abundant green space for recreation, gardening, or future development. Initial planning work has been completed to allow for lot severance, creating the potential to sell part of the land, build a custom home, or develop an investment property. Zoning also permits the construction of up to three Additional Dwelling Units (ADUs) in total. Whether you're seeking a distinctive family home with historic charm or a property with outstanding future potential, 78 William St W presents a rare opportunity in one of Waterloo's most desirable neighbourhoods.
Key Facts & Features
Property Costs
- Annual Property Tax Amount
- $9,261
- Land Transfer Tax Fee
- $24,433
- Basement Type
- Full, Unfinished
Interior Features
- Laundry Level
- Lower Level
- Interior Extras
- Other, Water Heater
- View
- City
- Fireplace/Stove
- Yes
- Elevator
- No
Exterior Features
- Pool
- None
- Property Features
- Arts Centre, Hospital, Library, Park, Place Of Worship, Public Transit
Building
- Building Type
- Detached
- Building Style
- 2-Storey
- Approx Age
- 100+
Construction
- Exterior Finish
- Brick
- Roof
- Asphalt Shingle
- Foundation Details
- Concrete, Stone
- Special Designation
- Unknown
Lot
- Lot Front
- 66.00 ft
- Lot Depth
- 329.00 ft
- Lot Size
- 0.51
Inclusions
- Inclusions
- Central Vac, Dishwasher, Gas Stove, Hot Water Tank Owned, Refrigerator, Smoke Detector, Washer
Parking & Garages
- Garage Type
- Detached
- Garage Spaces
- 1
- Parking Spaces
- 9
- Total Garage And Parking Spaces
- 10
Heating & Cooling
- Heat Source
- Gas
- Heat Type
- Radiant
- Air Conditioning
- None
- Water
- Municipal
- Sewers
- Sewer
- Natural Gas
- Yes
- Hydro
- Yes
- Cable
- Yes
- Telephone
- Yes
- Bedrooms
- 5
- Washrooms
- 2
- Kitchens
- 1
- Family / bonus room
- Yes
Room sizes
- Dining Room—Main level
- Family Room—Main level
- Kitchen—Main level
- Living Room—Main level
- Sunroom—Main level
- Bedroom—Second level
- Bedroom—Second level
- Bedroom—Second level
- Bedroom—Second level
- Primary Bedroom—Second level
- Other—Basement level
- Utility Room—Basement level
Washrooms
- 2-piece, Main
- 3-piece, Second
- Municipality
- Waterloo
- Main cross streets
- Westmount Rd S
- Zoning
- R4
- Directions
- Westmount Rd S to Williams St
- MLS® number
- X12862388
- Data source
- Toronto Regional Real Estate Board
- Status change
- 2026-03-25
- Listed on
- 2026-03-09
- Days on market
- 16 days
- Possession type
- Flexible
- Co-op commission
- 2% + HST
- Seller
- Listed by
- CORCORAN HORIZON REALTY
Home Market Value
Current home valuation for 78 William Street W, Waterloo, , . Listed for $1,397,888
HOMEH Estimate
$1,483,750
Estimated Sales Range
$1,038,625 - $1,928,875
HOMEH Estimate for 78 William Street W, Waterloo
Calculated with a real agent's CMA method — 45+ years of experience, codified. Not an AI guess.
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Mortgage Payment Calculator
Compare up to 4 down payment scenarios
5% on first $500K + 10% on $897,888 over $500K
$114,789
| Scenario 1 | Scenario 2 | Scenario 3 | Scenario 4 | |
|---|---|---|---|---|
−Down payment | % $ | % $ | % $ | % $ |
+CMHC insurance | $51,275 | $39,001 | $33,270 | $0 |
=Total mortgage | $1,333,138 | $1,297,100 | $1,221,475 | $1,118,310 |
Amortization | ||||
Mortgage rate | % | % | % | % |
| Payment frequency | ||||
=Mortgage payment | $6,509monthly | $6,333monthly | $5,964monthly | $5,460monthly |
Land Transfer Tax
$24,433
$24,433
Around this home
Data provided by OpenStreetMap & Fraser Institute School Rankings
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