Family Building Society
This number is listed by Family Building Society on its own website (Existing mortgage customers).
Source: “Mortgages - 03330 140146 mortgage.service@familybsoc.co.uk” (opens in a new tab). Checked 14 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Family Building Society back on the number on the back of your card, or call 159, which connects you to your bank.