You may add as many offices to your account as you wish.
Each office can offer its own range of services, and pricing for services can be varied by each office.
Referrals for each office are sent to the email address specified for the office, so each office can be effectively autonomous if desired. If you wish leads for all offices to be sent to a single administration point, it is important to use that email address for all offices.
Offices may not conflict on postcodes - if office A is set to receive referrals for a set of postcodes, those postcodes will not be able to be selected for any other office. To check which postcodes have been allocated to which office in your account, simply click the "View all your selected postcodes" link.
There is no need to add additional accounts for different offices unless you wish each office to be invoiced and charged separately.