The lowest deposit you can typically put on a house in the UK is 5% of the property's value. Some mortgage lenders offer 95% loan-to-value mortgages, allowing buyers to secure a home with a 5% deposit. However, availability and eligibility criteria may vary across lenders and specific circumstances. You may be able to find 100% mortgages where you don’t need to put down a deposit, but these generally come with strict financial conditions, such as being backed by a guarantor in case you can’t meet repayments.