For Sale Detached

78 William Street W

5 Beds
2 Baths
2500-3000 Sq Ft
Sale Price $1,549,000

Description

HALF AN ACRE IN UPTOWN WATERLOO! Live grand and sever, or develop. 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, 78William St W presents a rare opportunity in one of Waterloo’s most desirable neighbourhoods.

Property Details

Bedrooms: 5
Bathrooms: 2
Square Feet: 2500-3000
MLS Number: X12712986

Rooms

Dining Room

5.11 x 5.28

Family Room

3.78 x 5.16

Kitchen

5.99 x 5.28

Living Room

6.55 x 4.95

Sunroom

3.71 x 5.51

Bedroom

4.6 x 2.51

Bedroom

4.8 x 2.57

Bedroom

3.02 x 3.63

Bedroom

6.45 x 4.93

Primary Bedroom

4.39 x 5.31

Other

1.96 x 2.16

Utility Room

3.43 x 5.11

Characteristics

Property

Status: Sale
Type: Detached
Style: 2-Storey
Size (sq ft): 2500-3000
Age: 100+
Area: Waterloo

Inside

Bedrooms: 5
Bathrooms: 2
Kitchens: 1
Rooms: 12
Rooms Plus: 5
Den/Family Room: Y
Air Conditioning: None
Fireplace: Y

Building

Basement: Unfinished
Heating: Radiant
Water supply: Municipal
Exterior: Brick

Parking

Garage: Detached
Parking Places: 9
Parking Total: 10
Covered Parking Places: 1

Fees

Taxes: 9261
Tax Year: 2025
Cable Included: Y
Tax Legal Description: LT 15 PL 497 CITY OF WATERLOO; WATERLOO

Utilities

Electricity: Y
Gas: Y
Cable: Y

Land

Frontage: 66
Lot Depth: 329
Lot Size Units: Feet
Water Source: Municipal
Pool: None
Sewer: Zoning
Parcel Number: 224180041
Cross Street: Westmount Rd S

Sale History

Date Event Price MLS Number
Jan 20, 2026 Listed $1,549,000 X12712986
Jan 19, 2026 Removed X12479013
Oct 23, 2025 Listed $1,599,000 X12479013
Oct 23, 2025 Removed X12362824
Aug 25, 2025 Listed $1,790,000 X12362824
Aug 21, 2025 Removed X12144851
May 13, 2025 Listed $2,289,500 X12144851

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