Skip to main content
News
Mortgage Rates

Family BS Introduces HNW Interest Roll-Up Mortgage

Family Building Society launches a new mortgage for high-net-worth individuals, allowing loans with flexible terms.

By David Sampson
30 September 2026
2 min read
UK mortgage rates article image for Family BS Introduces HNW Interest Roll-Up Mortgage

TL;DR

  • •Family Building Society’s new mortgage offers loans for high-net-worth individuals.
  • •It caters to clients needing significant finance without liquidating assets.

Written by David Sampson for Mortgage118. Last updated 30 September 2026. Reviewed against our . Mortgage118 is a directory — not FCA-authorised and not a mortgage adviser.

Family Building Society has launched a new high-net-worth (HNW) interest roll-up mortgage, designed to cater to affluent borrowers with significant financial needs. This innovative product allows applicants to secure mortgages targeting those with a net annual income of at least £300,000 or net assets of £3 million. The introduction of this mortgage is significant as it provides a tailored solution for clients whose assets may be tied up in illiquid investments, offering flexibility in financing.

What are the key features of the HNW interest roll-up mortgage?

This new mortgage product allows for lending up to 65% loan to value (LTV), based on the projected final loan balance at the end of the term. For properties valued up to £10 million, the mortgage terms are capped at 10 years, while properties exceeding this value have a maximum term of five years. This structure is designed to accommodate the unique financial situations of high-net-worth clients.

Who can apply for this mortgage?

To qualify for the HNW interest roll-up mortgage, applicants must meet specific financial criteria. They need to demonstrate a net annual income of at least £300,000 or possess net assets of £3 million. This makes the product particularly suitable for affluent individuals who may have substantial assets but prefer not to liquidate them in the short term.

What this means for brokers and high-net-worth clients

The launch of this mortgage presents an excellent opportunity for brokers working with high-net-worth clients. As noted by Darren Deacon, head of intermediary sales at Family Building Society, this product offers a tailored, case-by-case approach that standard mortgage processes may not adequately address. Brokers can now provide their clients with significant financing options while navigating complex financial situations.

Frequently asked questions

What is the maximum loan amount available?

The maximum loan amount available through the HNW interest roll-up mortgage is not specified.

What are the eligibility criteria for this mortgage?

Applicants must have a net annual income of at least £300,000 or net assets of at least £3 million to qualify for the mortgage.

Mentioned in this article

About David Sampson

David Sampson writes about the UK mortgage market for Mortgage118, covering specialist lending, market trends, and practical advice for borrowers. All content is reviewed for accuracy against FCA guidelines and current market data.

1.0×