Mansion Mortgages: detailed guide

A mansion mortgage is a mortgage used to buy, refinance or build a large, high-value residential property in the United Kingdom. Mansion mortgages often involve large loan sizes and non-standard properties, so they are frequently arranged through specialist lenders or private banks rather than standard high-street mortgage products.

Yes, a mortgage to build a mansion is arranged as a self-build mortgage. Self-build mortgages release funds in stages as construction progresses, and lenders require planning permission, detailed costings and a credible professional team before agreeing to lend on a high-value build.

The deposit required for a mansion mortgage depends on the lender's maximum loan to value (LTV) for high-value properties. Lenders commonly apply lower maximum LTVs as loan sizes increase, so larger deposits are typical on mansion purchases.

Mansion mortgages are offered by some high-street banks, specialist lenders and private banks. High-street lenders may cap maximum loan sizes, while private banks specialise in large and complex loans. A whole-of-market broker can compare all three lender types to find suitable terms.

Interest-only mansion mortgages are available where the lender accepts a credible repayment strategy, such as the sale of the property, investments or other assets. High-value lending is one of the areas where interest-only remains common, because borrowers often hold significant assets outside the mortgaged property.