The current and original Canadian House of Commons chamber was influenced by the British House of Commons rectangular layout and that of the original St. Stephen's Chapel in the Palace of Westminster.
The difference from the British layout is with the use of individual chairs and tables for members, absent in the British Commons' design.

With the exception of the legislatures in Nunavut (circular seating), the Northwest Territories (circular seating), and Manitoba (U-shaped seating), all other Canadian provincial legislatures share the common design of the Canadian House of Commons.

Public Works and Government Services Canada undertook work during the 41st Parliament to determine how the seating arrangement could be modified to accommodate the additional 30 seats added in the 2015 election.
Ultimately, new "theatre" seats were designed, with five seats in a row at one desk, the seats pulling down for use.
Such seat sets now comprise almost the entire length of the last two rows on each side of the chamber.
The current and original Canadian House of Commons chamber was influenced by the British House of Commons rectangular layout and that of the original St. Stephen's Chapel in the Palace of Westminster. The difference from the British layout is with the use of individual chairs and tables for members, absent in the British Commons' design.
With the exception of the legislatures in Nunavut (circular seating), the Northwest Territories (circular seating), and Manitoba (U-shaped seating), all other Canadian provincial legislatures share the common design of the Canadian House of Commons.
Public Works and Government Services Canada undertook work during the 41st Parliament to determine how the seating arrangement could be modified to accommodate the additional 30 seats added in the 2015 election. Ultimately, new "theatre" seats were designed, with five seats in a row at one desk, the seats pulling down for use. Such seat sets now comprise almost the entire length of the last two rows on each side of the chamber.
House of Commons of Canada