Family Building Society is a trading name of National Counties Building Society which is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority. This online quotation service is provided by Cavendish Online Ltd. Cavendish Online Ltd is authorised and regulated by the Financial Conduct Authority. Firm register number 469385. Cavendish Online Ltd is registered in England & Wales no. 04045709. Registered Office Address: 20 Cathedral Yard, Exeter EX1 1HB. The information, guidance and / or advice contained within the website is subject to the UK regulatory regime and is therefore primarily targeted at customers in the UK.