A wireless wired network

My company is moving to a new office in about a month that won’t have wire drops in the walls for the workstations. The office currently has a wireless network, although almost all of the machines use a wired connection. My current task is to get a connection out to everyone. One option is to buy a wireless card for every machine, but this won’t work in the long run because each workstation also has an IP phone which uses a wired connection.