Relocating an office is not the same as relocating an average home. The difference lies in the fact that there is far more valuable equipment involved in this type of relocation. Not just valuable, they are delicate and can completely jeopardize the operations if something critical is damaged during transit.
Your first bet when you want to relocate your business is to look for a moving services company who has the necessary expertise to relocate businesses. A referral works best in these circumstances or you could check the credentials of the moving company if you so desired. Another good source for locating good and reputable office movers is other companies in the same industry, which could be located in the same building as yours or have recently shifted themselves.