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The MacDonald Building 123 Slater St 8,054 - 58,494 SF of Office Space Available in Ottawa, ON K1P 5H3

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HIGHLIGHTS

  • Full Floor Availability for a few spaces in the building
  • Fully remodeled washrooms
  • Property is BOMA Best Certification certified

ALL AVAILABLE SPACES(6)

Display Rental Rate as

  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 2nd Floor, Ste 200
  • 8,354 SF
  • 1-10 Years
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Central Air Conditioning
  • Newly transformed entrance facade
  • Fully remodeled common areas
  • Fits 21 - 67 People
  • Natural Light
  • Spacious two-story lobby
  • 3rd Floor, Ste 300
  • 10,510 SF
  • 1-10 Years
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Central Air Conditioning
  • Fully remodeled common areas
  • Digital climate control for comfort
  • Fits 27 - 85 People
  • Natural Light
  • Energy-efficient lighting and systems
  • 4th Floor, Ste 400
  • 10,510 SF
  • 1-10 Years
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Central Air Conditioning
  • Energy-efficient lighting and systems
  • Spacious two-story lobby
  • Fits 27 - 85 People
  • Natural Light
  • Digital climate control for comfort
  • 5th Floor, Ste 500
  • 10,510 SF
  • 1-10 Years
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Central Air Conditioning
  • Newly transformed entrance facade
  • Energy-efficient lighting and systems
  • Fits 27 - 85 People
  • Natural Light
  • Spacious two-story lobby
  • 10th Floor, Ste 1000
  • 8,054 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • January 01, 2026

Available: January 1, 2026

  • Fully Built-Out as Standard Office
  • Fits 21 - 65 People
  • 1 Conference Room
  • Open Floor Plan Layout
  • 11 Private Offices
  • 11th Floor, Ste 1100
  • 10,556 SF
  • 1-10 Years
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Lease rate does not include utilities, property expenses or building services
  • Mostly Open Floor Plan Layout
  • Central Air Conditioning
  • Wrap- Around Views
  • Fully Built-Out as Professional Services Office
  • Fits 27 - 85 People
  • Central Location
  • Natural Lighting
Space Size Term Rental Rate Space Use Condition Available
2nd Floor, Ste 200 8,354 SF 1-10 Years Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
3rd Floor, Ste 300 10,510 SF 1-10 Years Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
4th Floor, Ste 400 10,510 SF 1-10 Years Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
5th Floor, Ste 500 10,510 SF 1-10 Years Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
10th Floor, Ste 1000 8,054 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out January 01, 2026
11th Floor, Ste 1100 10,556 SF 1-10 Years Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now

2nd Floor, Ste 200

Size
8,354 SF
Term
1-10 Years
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

3rd Floor, Ste 300

Size
10,510 SF
Term
1-10 Years
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

4th Floor, Ste 400

Size
10,510 SF
Term
1-10 Years
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

5th Floor, Ste 500

Size
10,510 SF
Term
1-10 Years
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

10th Floor, Ste 1000

Size
8,054 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
January 01, 2026

11th Floor, Ste 1100

Size
10,556 SF
Term
1-10 Years
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

2nd Floor, Ste 200

Size 8,354 SF
Term 1-10 Years
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Fits 21 - 67 People
  • Central Air Conditioning
  • Natural Light
  • Newly transformed entrance facade
  • Spacious two-story lobby
  • Fully remodeled common areas

3rd Floor, Ste 300

Size 10,510 SF
Term 1-10 Years
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Fits 27 - 85 People
  • Central Air Conditioning
  • Natural Light
  • Fully remodeled common areas
  • Energy-efficient lighting and systems
  • Digital climate control for comfort

4th Floor, Ste 400

Size 10,510 SF
Term 1-10 Years
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Fits 27 - 85 People
  • Central Air Conditioning
  • Natural Light
  • Energy-efficient lighting and systems
  • Digital climate control for comfort
  • Spacious two-story lobby

5th Floor, Ste 500

Size 10,510 SF
Term 1-10 Years
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Fully Built-Out as Standard Office
  • Fits 27 - 85 People
  • Central Air Conditioning
  • Natural Light
  • Newly transformed entrance facade
  • Spacious two-story lobby
  • Energy-efficient lighting and systems

10th Floor, Ste 1000

Size 8,054 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available January 01, 2026

Available: January 1, 2026

  • Fully Built-Out as Standard Office
  • Open Floor Plan Layout
  • Fits 21 - 65 People
  • 11 Private Offices
  • 1 Conference Room

11th Floor, Ste 1100

Size 10,556 SF
Term 1-10 Years
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The MacDonald Building has undergone a comprehensive architectural transformation, offering a modern and inviting environment. The complex features a newly updated entrance facade, a stunning two-story lobby, fully remodeled washrooms, and common corridors. The building also boasts new, computer-dispatched elevators for increased convenience. Alongside these aesthetic improvements, the MacDonald Building has been upgraded with energy-efficient lighting, modern electrical distribution systems, and state-of-the-art chillers and boilers. The advanced building automation system ensures optimal comfort throughout the year with digitally controlled VAV boxes, making it an ideal space for businesses seeking a sophisticated and efficient work environment.

  • Lease rate does not include utilities, property expenses or building services
  • Fully Built-Out as Professional Services Office
  • Mostly Open Floor Plan Layout
  • Fits 27 - 85 People
  • Central Air Conditioning
  • Central Location
  • Wrap- Around Views
  • Natural Lighting

PROPERTY OVERVIEW

The MacDonald Building has undergone an extensive architectural transformation. The complex boasts a fresh new entrance facade, a two storey lobby, fully remodeled washrooms, common corridors, and new computer dispatched elevators. This modernization work complements the MacDonald Building’s already upgraded mechanical and electrical systems, including energy efficient lighting, upgraded electrical distribution on tenant floors, and modern energy- saving chillers and boilers. The Building automation system ensures year-round comfort with digitally controlled VAV boxes.

  • Bus Line
  • Controlled Access
  • Property Manager on Site
  • Security System
  • Wheelchair Accessible
  • Air Conditioning
  • Smoke Detector

PROPERTY FACTS

Building Type
Office
Year Built/Renovated
1963/2015
Building Height
11 Stories
Building Size
112,273 SF
Building Class
B
Typical Floor Size
10,546 SF
Unfinished Ceiling Height
9’
Column Spacing
25’ x 25’
Parking
Surface Parking
155 Covered Parking Spaces
Walk Score®
Walker's Paradise (100)
Transit Score®
Rider's Paradise (93)
Bike Score®
Biker's Paradise (95)
What is a Walk Score®, Transit Score® & Bike Score®?
Walk Score® measures the walkability of any address.
Transit Score® measures access to public transit.
Bike Score® measures bikeability of a location.
What is a Walk Score®
, Transit Score® & Bike Score?
Walk Score® measures the walkability
of any address. Transit Score®
measures access to public transit. Bike Score®
measures bikeability of a location.®
  • Listing ID: 4341071

  • Date on Market: 12/1/2025

  • Last Updated:

  • Address: 123 Slater St, Ottawa, ON K1P 5H3

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