Getting a self-build or custom-build mortgage can be more challenging than a standard mortgage because fewer lenders offer these specialist products, and the application process is more detailed.

Unlike buying an existing property, self-build projects involve more risk and planning, so lenders need greater assurance before approving funds. Key factors include:

• Fewer lenders offer self-build mortgages, and most high street banks do not provide them.
• Lenders require a detailed and accurate build cost breakdown, including a contingency allowance, and requirements can vary between providers.
• Funds are released in stages rather than as a lump sum, so a clear cashflow plan is needed to match the lender’s payment schedule with your build timeline.
• Detailed architectural plans and specifications are required, including materials, structure, and relevant certifications.
• Your level of involvement in the build will be assessed, as some lenders allow more DIY input than others depending on experience and project type.
• Specific insurance requirements apply, such as site insurance and structural warranties, and accepted providers may differ between lenders.