Essential Checks for London New-Build Apartments

Property, First-Time Buyers, London New Builds

What to Check Before Reserving a New-Build Apartment in London

Buying a new-build apartment in London can feel reassuringly neat: fresh paint, modern layouts, and no chain to worry about. But it is still a major financial commitment, and the process works differently to buying an older property. This calm, practical guide walks you through the key checks to make before you pay a reservation fee or sign anything.

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1. Deposits and Help to Buy Alternatives

With new builds, you will usually pay a reservation fee first, then an exchange deposit later. The reservation fee is often £500–£2,000 and is usually deductible from the purchase price, but it can be non-refundable if you pull out. Ask the sales team to put in writing:

• The exact amount of the reservation fee and when it is due
• In what circumstances it is refunded, partially refunded, or forfeited
• How long the price is fixed for once you reserve

At exchange of contracts, you will normally pay a 10% deposit. This can be higher for investors or if the lender requires it. Make sure your mortgage broker confirms you have enough funds for:

• The exchange deposit
• Stamp duty (if payable)
• Legal fees, surveys and moving costs

The Government’s Help to Buy equity loan has closed to new applicants, so first-time buyers now look to alternatives. Common options include:

• Shared ownership – you buy a share (for example 25–75%) and pay rent on the rest. Check staircasing rules and rent review clauses carefully.
• Deposit unlock or developer incentives – some schemes allow you to buy with a 5% deposit, sometimes supported by the developer. Understand whether this affects the mortgage rate or long-term costs.
• Family support – gifted deposits or guarantor mortgages. Make sure all parties receive independent advice.

💡 Calm tip: Before reserving, ask a whole-of-market mortgage adviser to show you how different schemes change your monthly payments and long‑term costs, not just your deposit.

2. How Off-Plan Timelines and Completion Work

Many London new builds are sold off-plan, meaning you commit before the building is finished. The key dates to understand are:

• Reservation date – you pay the reservation fee and take the property off the market for a set period, often 28 days.
• Exchange deadline – usually within that 28‑day window. Your solicitor reviews the contract and you pay the exchange deposit.
• Long-stop date – the latest date by which the developer must complete the building. If they do not, you may be able to withdraw and recover your deposit, subject to the contract.

Your mortgage offer will only be valid for a limited time, often six months. If construction overruns, you may need to reapply. Ask your broker:

• How long your chosen lender’s offer lasts
• What happens if completion slips beyond that date

Near completion, you will usually be invited to a snagging inspection to identify minor defects. It is worth taking a calm, methodical approach here: run taps, open windows, check sockets, and photograph anything that concerns you. Confirm in writing how and when snags will be addressed after you move in.

A simple written checklist keeps off-plan timelines and snagging calmly under control.

3. Leasehold vs Share of Freehold in New Builds

Most London flats, especially in new developments, are sold as leasehold. This means you own the right to live in the property for a set number of years, but not the land or building structure. Important points to check include:

• Lease length – ideally 125–999 years on a new build. Shorter leases can be harder to mortgage and sell later.
• Ground rent – many new leases now have zero or peppercorn ground rent, which is preferable. Be cautious about any rent that doubles or rises sharply.

Some developments offer a share of freehold, where leaseholders collectively own the building’s freehold, often through a company. This can give residents more control over management and costs, but it also brings responsibilities. Ask your solicitor to explain:

• How decisions will be made between leaseholders
• What happens if owners disagree on maintenance or improvements

4. Service Charges to Budget For

Service charges cover the upkeep of communal areas: lifts, hallways, gardens, concierge, gyms and so on. In London new builds, these can be significant, especially where there are many amenities. Before reserving, ask for:

• The estimated annual service charge for your exact apartment
• A budget breakdown showing how that figure is calculated
• Any planned major works or facilities that might increase costs later

It is sensible to stress-test your budget. Add the service charge and ground rent to your proposed mortgage payment, then consider council tax and utilities. Ask yourself calmly: would this still feel manageable if interest rates rose, or your circumstances changed?

💡 Calm tip: Compare service charges with similar developments nearby. Very low charges can be a warning sign if they do not realistically cover long‑term maintenance.

5. How to Vet the Developer Before You Commit

The quality of your home and how issues are handled after completion depend heavily on the developer. Before reserving, take time to research them calmly and independently.

• Track record: Search for previous schemes they have built in London. Visit if you can, or look at street‑view images and resident forums to see how buildings have aged.
• Reviews and complaints: Check online reviews, but read them with balance. Look for patterns, such as repeated mentions of poor snagging or unresponsive after‑care.
• Warranty provider: Most new builds have a 10‑year warranty (for example NHBC, LABC or similar). Confirm who the provider is and what is actually covered.
• Management company: Often a separate company will manage the building. Ask who they are, how long they are appointed for, and whether leaseholders can change them in future.

It can also help to speak to existing residents in another completed phase or development by the same builder. A short, polite conversation in the lobby can give you a realistic sense of build quality and after‑sales support.

Bringing It All Together Before You Reserve

Reserving a new-build apartment in London is not something you need to rush, even if the marketing feels urgent. Before you hand over a reservation fee, pause and check that you understand:

• How your deposit works and which buying scheme, if any, you are using
• The full off‑plan timeline, from reservation through to completion and snagging
• Whether the lease terms, ground rent and ownership structure feel fair and future‑proof
• The realistic ongoing costs of service charges and other outgoings
• The developer’s reputation and how they behave once the marketing banners come down

With these pieces in place, you can move forward steadily, ask clear questions, and decide whether this particular new-build truly fits your budget, your risk comfort, and the way you want to live in London over the coming years.