Buying a New-Build Home as an Investment: Mortgages, Deposits and Key Differences

Buying a new-build home as an investment can involve different mortgage requirements, deposit expectations and affordability checks compared with buying a property to live in yourself.

Below, we answer common questions about investment properties, buy-to-let mortgages, the deposits you may need and the key differences between buy-to-let and residential mortgages.

What deposit do I need for a buy-to-let mortgage?

Most buy-to-let mortgages require a deposit of at least 20% to 25% of the property value.

This is usually higher than the deposit needed for a standard residential mortgage because lenders assess buy-to-let properties differently. The deposit size can affect both the mortgage products available and the interest rate offered.

Higher deposits:

  • Reduce risk for lenders
  • Provide access to better interest rates

If you are considering a buy-to-let purchase, it is useful to speak to a mortgage advisor early so you understand the deposit required and how the rental income assessment works.

What is the difference between a buy-to-let mortgage and a residential mortgage?

A residential mortgage is for a home you live in, while a buy-to-let mortgage is for a property you rent out.

The main difference is how the lender assesses the application. Residential mortgages are usually based on your income and affordability, while buy-to-let mortgages are usually assessed against the property’s rental income potential.

Key differences:

  • Residential: based on your income
  • Buy-to-let: based on rental income potential
  • Buy-to-let typically requires a larger deposit

Choosing the right mortgage type is important, as using the wrong product could cause issues with your lender.

What is an investment property?

An investment property is a home purchased with the intention of renting it out rather than living in it.

Buyers usually purchase investment properties to generate rental income or hold the property as a long-term asset. These purchases are typically financed differently from homes bought as a main residence.

These are typically funded using:

  • Buy-to-let mortgages

New build homes can be attractive investments due to:

  • Lower maintenance costs
  • Energy efficiency
  • Strong tenant demand

A mortgage advisor can help explain how investment property finance differs from a standard residential mortgage.