$1,100,000 +GST/QST
ULS: 13353013
Co-ownership
for sale
510 Boul. St-Laurent app. PH-500, Montréal (Ville-Marie) (Vieux-Montréal)
AAA LOCATION | FULL-FLOOR PENTHOUSE Located in the heart of Old Montreal, this unique full-floor penthouse of 2,700 sq.ft. offers exceptional proximity to the metro, courthouse, CHUM, Old Port, and many restaurants. The Sieur-de-Cadillac building has undergone over $3M in façade restoration; now fully completed and paid for. The unit features windows on 2 sides, a modern kitchen, 2 enclosed offices, 2 washrooms, a server room, cathedral ceilings, and central A/C (new 2026 rooftop unit). Includes 37 workstations. Heating and hot water included in condo fees. Immediate occupancy. In top condition and offered at municipal assessment value!
Sale with exclusion(s) of legal warranty - See listing broker(s)
Addendum
AAA LOCATION | FULL-FLOOR PENTHOUSE
THE SIEUR-DE-CADILLAC BUILDING
The building benefits from an exceptional location at the corner of Saint-Laurent Boulevard and Notre-Dame Street, in the heart of Old Montreal. Within walking distance of all services and amenities: Place-d'Armes metro station, Montreal Courthouse, Convention Centre, Quartier des Spectacles, Gare Viger, CHUM, parks, the Old Port, as well as an unmatched selection of restaurants, bistros, and cafés.
This century-old building, converted into divided co-ownership in 2004, is ideally located directly across from the Montreal Courthouse. It is primarily occupied by law firms and various professionals who appreciate its strategic location.
Since 2020, co-owners have invested over $3,000,000 in the state-of-the-art restoration of the masonry on both façades, helping preserve and enhance the building's value. The work, including the restoration of the copper cornices, was carried out with great care under municipal supervision. The City also contributed $500,000 in 2025. Today, the building stands as a remarkable example of restoration within the historic district of Old Montreal.
The building features an elevator, a secure key fob access system, and an intercom for visitors. Central hot water heating (gas) is included in the condo fees, as well as hot water, helping the unit reduce energy costs with Hydro-Québec.
SUITE PH-500
Truly one of a kind, this expansive corner unit of 2,700 sq.ft. occupies the entire top floor of the building. It was fully renovated and reconfigured in 2008 by the current owner.
The layout includes a modern kitchen, 2 enclosed offices, 2 private washrooms (men's and women's), as well as a server room with its own dedicated air conditioning unit. The cathedral ceiling enhances both natural light and the sense of space in the open-concept area.
Suite PH-500 features its own central air conditioning system. To comply with recent municipal regulations, the rooftop unit is fully replaced in Spring 2026.
An electrical room of approximately 72 sq. ft. is also located within the suite. While not frequently accessed, it houses equipment servicing suites 500, 400, 300, and 301 (see servitude created in November 2025 and its new Certificate of location).
Previously configured with multiple enclosed offices, PH-500 offers strong layout potential. It would be relatively easy for a buyer to add up to 9 additional enclosed offices, each with an exterior window, as ventilation ducts and sprinklers remain in place.
PH-500 is currently vacant, available for immediate occupancy, and is sold with the existing furniture (37 workstations).
For more information and a visit, please contact the listing broker and ask for the full documentation package and seller's declarations form he completed and signed.
Offered at municipal assessment value!
THE SIEUR-DE-CADILLAC BUILDING
The building benefits from an exceptional location at the corner of Saint-Laurent Boulevard and Notre-Dame Street, in the heart of Old Montreal. Within walking distance of all services and amenities: Place-d'Armes metro station, Montreal Courthouse, Convention Centre, Quartier des Spectacles, Gare Viger, CHUM, parks, the Old Port, as well as an unmatched selection of restaurants, bistros, and cafés.
This century-old building, converted into divided co-ownership in 2004, is ideally located directly across from the Montreal Courthouse. It is primarily occupied by law firms and various professionals who appreciate its strategic location.
Since 2020, co-owners have invested over $3,000,000 in the state-of-the-art restoration of the masonry on both façades, helping preserve and enhance the building's value. The work, including the restoration of the copper cornices, was carried out with great care under municipal supervision. The City also contributed $500,000 in 2025. Today, the building stands as a remarkable example of restoration within the historic district of Old Montreal.
The building features an elevator, a secure key fob access system, and an intercom for visitors. Central hot water heating (gas) is included in the condo fees, as well as hot water, helping the unit reduce energy costs with Hydro-Québec.
SUITE PH-500
Truly one of a kind, this expansive corner unit of 2,700 sq.ft. occupies the entire top floor of the building. It was fully renovated and reconfigured in 2008 by the current owner.
The layout includes a modern kitchen, 2 enclosed offices, 2 private washrooms (men's and women's), as well as a server room with its own dedicated air conditioning unit. The cathedral ceiling enhances both natural light and the sense of space in the open-concept area.
Suite PH-500 features its own central air conditioning system. To comply with recent municipal regulations, the rooftop unit is fully replaced in Spring 2026.
An electrical room of approximately 72 sq. ft. is also located within the suite. While not frequently accessed, it houses equipment servicing suites 500, 400, 300, and 301 (see servitude created in November 2025 and its new Certificate of location).
Previously configured with multiple enclosed offices, PH-500 offers strong layout potential. It would be relatively easy for a buyer to add up to 9 additional enclosed offices, each with an exterior window, as ventilation ducts and sprinklers remain in place.
PH-500 is currently vacant, available for immediate occupancy, and is sold with the existing furniture (37 workstations).
For more information and a visit, please contact the listing broker and ask for the full documentation package and seller's declarations form he completed and signed.
Offered at municipal assessment value!
Building details and property interior
Dimensions
77' 3" X 40' 3" irr.
Year constructed
1905
Living area
251.70 m²
Windows
Aluminum, on 2 façades
Siding
Brick, Stone
Roofing
Elastomeric membrane, redone in 2016
Dividing Floor
Concrete
Lot and exterior features
Distinctive Features
Street corner
Proximity
Palais de Justice, CHUM, Hôtel-de-ville, Highway, Metro, Public transportation
Characteristics
Heating System
Hot water
Heating Energy
Natural gas, Included in condo fees
Property or unit amenity
Central air conditioning, Elevator, Server room with additional A/C unit, Alarm system, Sprinkler system, Fire detector (O), Intercom
Water Supply
Municipality
Sewage System
Municipality
Financial details
Municipal assessment (2024)
- Lot assessment
- $ 280,700
- Building assessment
- $ 823,300
- Total
- $ 1,104,000
Taxes
- Municipal (2026)
- $ 27,660
- School (2025)
- $ 865
- Total
- $ 28,525
Annual expenses
- Common expenses
- $ 12
- Condominium fees
- $ 21,948
- Total
- $ 21,960
Energy expenses
- Electricity
- $ 2,873
- Total
- $ 2,873
Inclusions and exclusions
Inclusions
window blinds, dishwasher, all existing furniture in the premises, the computer equipement in the server room for the access system of the building and unit, all sold as is and left in the premises. A new 2026 A/C unit installed on roof.
Exclusions
any other computer equipment in the premises.
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