Dr Annan, who died on August 18, is remembered fondly by many Kenyans because of his patient deliberations for peace following the disputed 2007 presidential election that led to the death of 1, 133 Kenyans, and the displacement of 650,000 others.
The former UN head led the Serena talks, named after the Nairobi hotel where the mediation took place, former Tanzanian President Benjamin Mkapa and former South African First Lady Graca Machel.
In his condolence message, President Uhuru Kenyatta said: "The government and the people of Kenya join the people of Africa and the international community in remembering his remarkable service to the world.
"In this regard, the people of Kenya are grateful to him for the critical role he played as a mediator during the 2008 post-election crisis."
In the talks were Mr Wetang'ula, Martha Karua, Sam Ongeri, the late Mutula Kilonzo, William Ruto, James Orengo, Musalia Mudavadi, and Dr Sally Kosgey.
The talks came after widespread violence following the declaration of former President Mwai Kibaki as the winner of the disputed poll that Mr Odinga and his team claimed was rigged.
In his speech to the House, Mr Wetang'ula described Dr Annan as one who paid the "greatest attention" to the role of civil society, gender equality and the fights against poverty, depravation and underdevelopment.