New build mortgages explained

There are lots of good reasons to buy a new home but new build mortgages can throw up complications. We take a look at the issues you need to be aware of so you’re in the know from the word go.

new build mortgages

What are new build mortgages?

New build mortgages are mortgages taken out on a new build home. Lenders will often consider a home to be a ‘new build’ if it has been built in the last two years.

What deposit do you need for new build mortgages?

You’ll often need a bigger deposit for new build mortgages than if you’re buying an older property. This is because mortgage lenders are often stricter on the amount they’ll lend on new builds to protect themselves from the risk of the property falling in value in the early years.

You may also need a bigger deposit if you’re buying a new build flat than a new build house.  

  • For example, NatWest offers a maximum 85% loan-to-value ratio on new build houses – this means you’ll need a 15% deposit. But only up to 75% LTV on new build flats, which means you’ll need a 25% deposit. So if you’re buying a £200,000 new build house, a 15% deposit is £30,000. While a 25% on a £200,000 new build flat is £50,000. But this differs according to lenders.

However, there are some ways to get new build mortgages with a small deposit. For example, if you buy through the Deposit Unlock scheme you can buy a new build home from a participating builder with a 5% deposit – see below for more details.

What to watch out for with new build mortgages

There are a number of issues you’ll need to consider about new build mortgages, including:

1. You’ll need to move fast when getting new build mortgages

When buying a new build home you’ll often only have 28 days to exchange contracts once you’ve reserved your property. This can be a challenge when it comes to getting new build mortgages because some lenders may struggle to complete your application within that time frame.

So it’s advisable to speak to a specialist new build mortgage broker to help you find the right lender.

Buying a new build home? Speak to the new build specialist mortgage brokers at L&C, who can access specialist new build mortgage products. Plus, they won’t charge you a penny.

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2. Beware of new build mortgage offer periods

Mortgage offers usually only last for up to 6 months and this may cause problems if you’re buying a new build home off-plan and you complete after your mortgage offer expires. That’s because while you may be able to get the lender to extend your mortgage offer, in most cases your mortgage application will need to be re-assessed by starting your application over again.

If you can’t get a new mortgage offer, for example, because the value of the property has fallen since exchange, this could cause major problems because when you’re buying a new build you’ll usually be asked to sign a contract agreeing to buy the property at the current advertised price and to pay off the balance at completion.

And if you have to pull out of the purchase because you can’t get a mortgage, you’ll lose your deposit due to breach of contract. You may also be sued by the developer for the difference between the agreed price and the lower price it subsequently achieves at re-sale, as well as any legal fees incurred.

How to avoid this new build mortgage pitfall

Recognising that many new build projects can be subject to delays, some lenders have special new build mortgages. These new build mortgages have a longer validity period that can be up to three months longer than their usual deadlines. Specialist new build mortgage brokers will know the products which will remain valid for longer. Mortgage brokers will also be on hand should you need to move quickly to re-apply or find an alternative lender.

Also, many experts urge buyers to establish if the contract price is ‘locked’ at exchange therefore and, if so, what happens if prices rise or fall before completion. So speak to your new build conveyancing solicitor about this.

And make sure your conveyancing solicitor writes a ‘long-stop’ completion date into your contract that falls before your mortgage offer expires. So if there’s a delay, it means you can walk away and get a full refund if the developer doesn’t complete your home by that date. Find out more in our guide New build conveyancing explained.

Buying a new build home? Speak to the new build specialist mortgage brokers at L&C, who can access specialist new build mortgage products. Plus, they won’t charge you a penny.

Mortgage Finder

Get fee free mortgage advice from our partners at L&C. Use the online mortgage finder or speak to an advisor today.

Find a mortgage

3. Don’t get caught out by new build developer freebies

Some housebuilders offer incentives such as having your stamp duty or legal fees paid in order to set their development apart from others.

A developer would much rather offer an incentive to make the new build premium price more palatable to buyers than reduce the purchase price overall.

However, mortgage lenders will take builder incentives into account when considering your new build mortgage application. If the incentive is worth up to 5% of the value of the property, there should be no issue.

But, if they exceed this point, there could be issues. A lender could still agree to a mortgage, but they may knock the amount that surpasses the 5% point off the purchase price. This can have a significant impact on your loan to value (LTV) and impact your mortgage rates. If you’re unsure about how an incentive could affect your mortgage application? Get free advice now

New build incentive limitations

Purchase PriceIncentive ValueImpact
£200,000£10,000 (5%)None
£200,000£12,000 (6%)Lenders may take £2,000 off the purchase price when assessing the mortgage
£200,000Non-cash, e.g. white goodsNone

The new build mortgage process – an overview

So what is the new build mortgage process? Here are the steps you’ll need to follow…

  1. Check what you can afford: Contact a fee-free mortgage broker to see how much you can borrow and which deals you might be eligible for. Let them know if you’re considering buying a new build as new build mortgages may require you to have a bigger deposit.
  2. Get your Mortgage in Principle: Next, get your ‘mortgage in principle’. This is an indication that a lender could lend you a specified amount, based on details you’ve provided about your income, spending and debts. With our partners at L&C, you can get a personalised Decision in Principle in minutes. Getting a mortgage in principle is important because most developers will want to see proof you can proceed before accepting your offer.
  3. Apply for your new build mortgage: Once you’ve found a new build house you want to buy and reserved it, go back to your mortgage broker to make your mortgage application. If you haven’t found a mortgage yet, get to work asap. Speaking to a mortgage broker can make this process quicker and easier.
  4. Secure your mortgage offer: The lender will issue a mortgage offer once it has carried out a mortgage valuation survey and approved your application. You’ll then be ready to exchange, to pay a deposit and set a completion date, although this may be moved back if there are any delays.
  5. Complete: Once your property is ready you’ll be able to complete and move into your new home.

How much can I borrow on a new build mortgage?

Lenders will typically lend between 4 and 5 times your annual salary depending on your outgoings and credit history. Other income such as pensions, investments or earnings that fall outside your main salary will also be considered, as well as, the size of your deposit.

New build mortgage calculator

To find out instantly how much you may be able to borrow on your income, try our handy mortgage calculator. And for a more detailed look at how much you’ll be able to borrow on a new build mortgage it’s a good idea to speak to a fee-free mortgage broker.

Use this mortgage cost calculator to see what your monthly mortgage payments will be for different options to work out what you can afford.

When do you start paying the mortgage on a new build?

When you’re buying a new build property, you’ll start paying the mortgage after you’ve completed, just like if you’re buying a non new build property.

Getting new build mortgages with a small deposit

There are a number of ways of getting new build mortgages with a small deposit including:

The Deposit Unlock scheme

Deposit Unlock is a scheme developed by the Home Builders Federation to help first time buyers and home movers buy a new build home with a 5% deposit. However you can only buy a home from a house builder participating in Deposit Unlock and using one of the new build mortgages offered by a participating lender.

For information about Deposit Unlock, participating builders and mortgage lenders, see our advice guide Deposit Unlock explained.

Shared ownership and new build mortgages

If you want to buy a new build home and you only have a small deposit you may want to consider shared ownership. This is when buy a share of a property and pay rent on the remaining share. This means you need a smaller mortgage and therefore an smaller deposit. But there are pros and cons to this complicated scheme, so we’d always recommend buying on the open market if you can. Find out more in our guide on Shared Ownership.

First Homes scheme

The First Homes Scheme lets first time buyers buy a home for 30% to 50% less than its market value when you meet certain criteria (although qualifying properties are very scarce).

New build mortgages: How does Own New Rate Reducer work?

The Own New Rate Reducer scheme allows you to buy a new build home with a mortgage and pay a lower mortgage rate than if you buy on the open market with a traditional mortgage. When you choose your property, the developer will agree to contribute 3% or 5% of the purchase price. House builders do this as an incentive for you to buy their properties.

The developer’s contribution goes to your mortgage lender, via Own New. The lender will take the developer’s contribution of 3% or 5% and offset it against the mortgage interest to reduce your monthly payments for the first 2 or 5 years, depending on the length of your initial term. See our guide for more information on the Own New Rate Reducer scheme.

Own New also offers the Deposit Drop scheme, which lets people buy a new build home with a 5% deposit. It launched in the North East and Yorkshire in 2023, with plans to broaden out where it’s available in due course.

New build mortgages? Brokers can help

With new build mortgages, it’s a good idea to speak to a mortgage broker. Not only will it save you time because they’ll shop around for you but they often have access to deals that you won’t be able to find yourself. Plus they can be very helpful when it comes to arranging a new build mortgage.

Buying a new build home? Speak to the new build specialist mortgage brokers at L&C, who can access specialist new build mortgage products. Plus, they won’t charge you a penny.

What are the pros and cons of buying a new build?

There are clear benefits to buying a new build including:

  • Low maintenance – A new build home is a blank canvas with fresh tiling, paintwork, kitchen and bathrooms. This means there should be very little, if anything, you need to do to it.
  • Low bills – New build homes have to comply with the latest building regulations. This means they are far more energy efficient than older properties. And this in turn means lower energy bills.
  • Chain-free – As you’ll be the first owner you won’t have a chain of buyers above you. This can take away one of the main stresses of buying a home.

But there are also some downsides:

  • The new home premium – You pay more for “brand new”. A one-year-old property may fall in value as buyers look at the new-builds popping up in the development across the road instead. If you’re buying a new-build, plan to live in it for the longer term. So if you are buying a new build, make sure you don’t overpay. Read our guide Can you make an offer on a new build? for tips.  
  • Quality and Snags – We’ve covered numerous new build problems here at the HomeOwners Alliance website and in the press, and summarise what to watch for in Buying a new build home: essential guide.
  • Delays New build delays are common and it isn’t unusual for the move-in date on a new build property to be delayed. Too long a wait can affect mortgage offers.

If you’re getting a mortgage for a new build you’re buying, make sure you do your research starting with our guide on the Pros and Cons of New Build.

Frequently asked questions

Is it harder to get a mortgage for a new build?

Yes it can be harder to get a mortgage for a new build. But it will depend on the lender’s lending criteria for new build mortgages. If you’re buying a new build it’s a good idea to speak to a fee-free mortgage broker. They know which lenders will be best suited to you and find you the best deal too.

Can you get 95% new build mortgages?

Yes it’s possible to get 95% new build mortgages, such as if you use the Deposit Unlock scheme. But there may be other 95% new build mortgages options avaliable to you so it’s a good idea to speak to a fee-free mortgage broker to get the latest advice.

How can I find a new build home?

When you’re looking online you’ll find most property portals have a new build home filter you can search. For example, Zoopla have a search function dedicated to new builds.

What is a new build?

A new build is a home that’s brand new and has never been lived in.

What is a new build warranty?

A building or structural warranty is essentially an insurance policy for newly built homes. It’s almost impossible to sell a home without one as all mortgage lenders require a 10 year structural warranty. Although it’s taken out by the builder or developer it is there to protect you, the buyer (and your mortgage lender). The type of warranty typically covers you for defects that arise due to faults in the design, workmanship or materials that remain undiscovered at the time of practical completion on your new build.
These policies are referred to by many different names, including New Home Warranties, New Build Warranties, Structural Warranties, Latent Defects Insurance and Inherent Defects Insurance. Find out more in our guide New home warranties: What they do and don’t cover.

Do I need life insurance when buying a new build home?

Life insurance isn’t mandatory when taking out a mortgage to buy your new home but it can give financial security to your loved ones if you die while still having a mortgage to pay off. Find our more about life insurance options when taking out a mortgage.

Related Reads

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HomeOwners Alliance Ltd is registered in England, company number 07861605. Information provided on HomeOwners Alliance is not intended as a recommendation or financial advice.

Mortgage service provided by London & Country Mortgages (L&C), Unit 26 (2.06), Newark Works, 2 Foundry Lane, Bath BA2 3GZ, authorised and regulated by the Financial Conduct Authority (FRN: 143002). The FCA does not regulate most Buy to Let mortgages. Your home or property may be repossessed if you do not keep up repayments on your mortgage.

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