Given sufficient time and planning, most office furniture can be repurposed through sale or donation.  Although used office furniture has very little value, it can mean that your furniture is removed at no cost to you.  For older or damaged furniture, the right moving company will offer recycling services that can include the disassembly, removal and recycling of wood and metal.  Moving is costly, so consider asking your building or mover to provide cleanup bins for paper, cardboard, plastics, old IT equipment, etc. and hold office-wide cleanups prior to the move to ensure you are only moving what is necessary.