What the people of Canada will lose, if Larco builds an addition to the Chateau.

1.)  Views of the Chateau Laurier Hotel, a former Classified Federal Heritage Building and National Historic Site of Canada.
2.)  The Rideau Canal's designation as a UNESCO World Heritage Site. World Heritage Sites are protected by a 30 metre buffer zone. The Chateau Laurier condo will be only 18 metres from the Rideau Canal. Also, new buildings constructed beside the Rideau Canal have to conform to guidelines outlined in the "The Rideau Canal National Historic Site - Principles of Good Waterfront Development." 
3.) The incongruous addition to the hotel will destroy the architectural and historical integrity of the "Confederation Square National Historic Site of Canada".
Parks Canada Directory of Federal Heritage Designations
Designation
"Located in the heart of the nation's capital, the Confederation Square National Historic Site of Canada is best known to Canadians as the site of the National War Memorial with the Tomb of the Unknown Soldier. The square is framed by a group of buildings including:

• the Central Chambers
• the Scottish-Ontario Chambers
• the Central Post Office
• the Langevin Block
• the East Block of the Parliament Buildings
• the Chateau Laurier
• the Union Station (Grand Trunk).
• the National Arts Centre

"The official recognition refers to the whole site with its component parts, the remaining facade of a ninth and the War Memorial in their existing spatial relationships."

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4.)  Major's Hill Park - a 14-acre federal park located behind the Chateau Laurier. The park will be a hub of activity when underground tunnels transverse the land (for the placement of sewers, etc.) and the trees that currently separate the hotel from the park are chopped down because Larco does not want views of Major's Hill to be obstructed.
And in the near future a Privy Council Order-in- Council signed by the Governor General of Canada will strip the park from the People of Canada and place it in the hands of Fairmont; or a condo corporation or another foreign embassy.  Part of Major's Hill was sold to the American government in 1994.

"Dreams of Major's Hill Park" (1969-70) - From Urbsite. The land is now owned by the American Embassy.

5.)  The Chateau Laurier will no longer be part of Ottawa's "Parliamentary Precinct" because the design of the new addition will clash with the style of existing landmarks:
Parliamentary Precinct Buildings and Monuments
Chateau Laurier Hotel
Library of Parliament
The Peace Tower
The East Block
The Centre Block
The West Block
Justice Building - 284 Wellington Street
Statues, monuments and memorials including the National War Memorial
The Centennial Flame
The former American Embassy
Senate of Canada Building
Rideau Committee Rooms - 1 Wellington Street.

6.)  Ottawa is listed as one of the most beautiful capital cities in the world:
The News International-Most beautiful capitals of the world, by Mariam Malik
Number 9:
Ottawa, being the capital of Canada, is situated near River Ottawa in the eastern portion of Southern Ontario. Ottawa is a city famous for its climate, snow and ice being dominant during the winters and summers are humid. The most beautiful places in this city include:
The Rideau Canal
The Canadian War Museum
The National Gallery
Major's Hill Park
Library and Archives.