Sold for:Sold Mar 25, 2026
$1,397,888

78 William Street W

Waterloo, ON N2L 1J7

Detached House SoldNot available

Property not available for sale or for rent.

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Sale & Price History for 78 William Street W, Waterloo

2026-03-09
2026-03-25
Sold
Price
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MLS#
x12862388
2026-01-20
2026-03-09
Terminated
Price
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2025-10-23
2026-01-19
Expired
Price
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2025-08-25
2025-10-23
Terminated
Price
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2025-05-13
2025-08-21
Terminated
Price
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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.

$1,483,750Low confidence
Based on 4 comparable properties
See the full analysisFree Every recent nearby sale behind this number

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Mortgage Payment Calculator

Compare up to 4 down payment scenarios

$
Minimum Down Payment Required:8.2%

5% on first $500K + 10% on $897,888 over $500K

Minimum down payment

$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
Are you a first time home buyer?

Land Transfer Tax

Provincial

$24,433

Total Land Transfer Tax

$24,433

Around this home

6/100Almost All Errands Require a Car
0/100Minimal Transit
0/100Not rated
Loading map...
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