Buying a new build home is different from buying an existing property, and the mortgage process reflects that. Lenders apply different criteria to new builds, developers offer incentives that can affect your borrowing, and the timelines involved are often longer and less predictable. This guide explains what to expect if you are buying a new build in Cambridge and how to navigate the mortgage process.
New Build Developments in Cambridge
Cambridge and the surrounding area have a number of active new build developments. Major schemes include Marleigh (east Cambridge, delivered by Hill, with up to 1,391 homes including a primary school and community facilities), Knights Park at Eddington (Hill, part of the University of Cambridge’s Eddington development on the north-western edge of the city), Darwin Green (north-west Cambridge, Barratt Homes and L&Q Shared Ownership), Netherhall Gardens (south Cambridge, Cala Homes, close to the Biomedical Campus), and Springstead Village (Cherry Hinton, part of the wider Cambridge East area).
Beyond the city boundary, Northstowe (a new town between Cambridge and Huntingdon) and Waterbeach (north-east of Cambridge) are delivering large numbers of new homes with a range of house types and price points. Some developments also include Shared Ownership options.
Developers, phases, and availability can change. The examples above are illustrative, and it is worth checking the current position for your chosen development. The type of development and the developer involved can affect the mortgage options available to you.
Eddington: A University-Led Development
Eddington is distinctive in Cambridge because it is developed by the University of Cambridge rather than a commercial housebuilder. The development includes a mix of private sale, University key worker, and affordable housing. Some properties at Eddington are subject to University restrictions on resale, which can affect mortgage eligibility with certain lenders. If you are considering a purchase at Eddington, it is worth discussing any restrictions with a broker before you commit, as not all lenders will accept properties with non-standard resale conditions.
Deposits for New Build Properties
Many lenders require a larger deposit for new build purchases than for existing properties. While 5% deposits are available on some new builds, lenders often prefer 10–15%, particularly for houses. Flats in new build blocks can sometimes require a higher deposit still, depending on the lender’s criteria for that development.
The reason for higher deposit requirements is partly to do with valuation risk. Lenders assess new build properties based on their current market value, not the developer’s asking price. If a lender values the property below the asking price, you may need a larger deposit to bridge the gap, or renegotiate with the developer.
Deposit Unlock and Other Schemes
Deposit Unlock is a scheme supported by some major housebuilders that allows buyers to purchase a new build with a 5% deposit. The developer provides an insurance-backed guarantee to the lender to offset the additional risk. Not all developments participate, and not all lenders offer Deposit Unlock products, so it is worth checking availability early. Availability depends on the housebuilder and development, and participating lenders can change.
Some developers also offer their own deposit contribution schemes, where they contribute a proportion of the deposit as an incentive. These need to be disclosed to the lender, as they can affect the way the mortgage is assessed.
For more on deposits at Cambridge prices, see our deposit guide.
Mortgage Offer Validity and Build Delays
Mortgage offers are often valid for around six months from the date of issue, although this varies by lender and product. When buying a new build that is still under construction, there is a risk that the build will not complete within that window. If your mortgage offer expires before completion, you may need to reapply or extend the offer, which can mean a reassessment of your circumstances and potentially a different rate.
Some lenders offer extended offer periods for new builds, sometimes nine or twelve months, depending on the lender and scheme. If your development has a long build programme, it is worth selecting a lender that offers an extended validity period from the outset.
Your contract with the developer should include a long-stop date — a backstop deadline by which the build must complete or either party can withdraw. Understanding this date and how it relates to your mortgage offer validity is important.
Valuations and the New Build Premium
New build properties often carry a premium over equivalent existing homes. This reflects the warranty, specification, and energy efficiency that come with a new build, but it can also mean the property does not immediately hold its value on the resale market.
Lenders instruct their own valuation on new build purchases, and this valuation may come in below the purchase price. If that happens, you have several options: increase your deposit to cover the shortfall, ask the developer to reduce the price, or look for a lender with a different valuation approach. A broker can help you navigate this.
Developer Incentives and How They Affect Your Mortgage
Developers commonly offer incentives to attract buyers. These can include gifted deposits, stamp duty contributions, upgraded fixtures and fittings, part-exchange schemes, and cashback on completion. While these can reduce your upfront costs, they must be disclosed to your lender and can affect how the mortgage is assessed.
Many lenders cap the total value of incentives they will accept. This is often in the region of 5% to 10% of the purchase price, depending on the lender and the loan-to-value. If the developer’s incentive package exceeds this cap, the lender may reduce the property’s value for mortgage purposes, which can affect how much you can borrow.
It is important to discuss any incentives with your broker before committing, so that the mortgage application reflects the full picture.
Snagging, Completion, and Warranties
Before you complete on a new build purchase, you should arrange a snagging inspection — a detailed check of the property for defects or unfinished work. This is separate from the lender’s valuation and is carried out for your benefit. Some buyers instruct a professional snagging company, which often costs a few hundred pounds.
New build homes come with a structural warranty, usually provided by the NHBC, LABC, or Premier Guarantee. This often covers ten years, depending on the warranty provider and policy terms. Lenders require a recognised warranty to be in place as a condition of lending.
Completion on a new build often happens on a date set by the developer rather than by mutual agreement. This can create pressure to complete quickly once the property is ready. Having your mortgage in principle and legal work well advanced before the completion notice is issued can help avoid last-minute pressure.
Energy Efficiency and Running Costs
New build homes are built to current building regulations and are generally more energy efficient than older properties. Many achieve an EPC rating of A or B, which can mean lower energy bills compared to an older home.
Some lenders offer “green mortgage” products for energy-efficient properties. In some cases, these may offer a pricing benefit, depending on the lender and the EPC rating.
Hidden Costs to Budget For
When buying a new build, the purchase price may not include everything you expect. Items such as flooring, turf for the garden, window coverings, and fitted wardrobes are often excluded from the base price or offered as optional extras. These costs can add up and should be factored into your budget alongside the deposit, legal fees, and mortgage costs.
Some developments also carry management charges or estate rent charges for the upkeep of shared spaces. These are ongoing costs that should be understood before you commit.
Stamp Duty on New Build Purchases
Stamp duty applies to new build purchases in the same way as existing properties. First-time buyers may qualify for relief on purchases up to £300,000, though in Cambridge most new build purchases exceed this level. Some developers offer to pay the stamp duty as an incentive, but this must be disclosed to your lender. For worked examples at Cambridge price points, see our stamp duty guide.
The New Build Buying Process
The buying process for a new build typically follows this sequence: get a mortgage in principle, choose your plot, pay a reservation fee (often in the region of £500 to £1,000, and typically deducted from your deposit on exchange), instruct a solicitor, submit your full mortgage application, exchange contracts (usually within 28 days of reservation, though this varies), and then wait for the build to complete before final completion. The timeline from reservation to completion can be weeks for a finished property or many months for one still under construction.
It is important to have your mortgage in principle and solicitor in place before you reserve. Developers often set tight exchange deadlines, and missing them can mean losing your reservation fee or your preferred plot. For more on how much you can borrow, see how much you can borrow.
Frequently Asked Questions
What questions should I ask when buying a new build?
Key questions include: what is included in the purchase price and what is extra, what incentives are available and how they affect the mortgage, what is the expected completion date, what warranty is provided, what are the management or estate charges, and what happens if the build is delayed beyond the long-stop date.
Do I need a bigger deposit for a new build?
Not always, but many lenders prefer 10–15% for new builds. Some schemes such as Deposit Unlock allow 5% deposits on participating developments. The deposit required depends on the lender, the property type, and the development.
Is it harder to get a mortgage on a new build?
Not necessarily harder, but different. Lenders apply specific criteria to new builds, and not all lenders offer new build products. A broker can identify which lenders are most suitable for your development and circumstances.
What is a long-stop date?
A long-stop date is a contractual deadline by which the developer must complete the build. If the property is not ready by this date, either party may be able to withdraw from the contract. It is a protection for buyers against indefinite delays.
Next Steps
If you are buying a new build in Cambridge, the most useful first step is to get a mortgage in principle before you reserve. This confirms your budget and shows the developer you are a serious buyer. We can also advise on how specific incentive packages may affect your borrowing and which lenders work best for new build purchases.
Visit our Cambridge page to book a consultation, or call 01223 655 579.