Buying a brand-new home before it’s even been built is an exciting prospect — a property designed to your tastes, with modern fixtures and energy-efficient features straight out of the box. But purchasing off-plan comes with its own set of considerations that are quite different from a standard house purchase. Understanding what’s involved before you commit can save you a lot of stress further down the line.
Whether you’re a first-time buyer drawn in by a sleek new development, or a home mover looking for something fresh, here’s what you should know before signing on the dotted line.
What Does “Buying Off-Plan” Actually Mean?
When you buy off-plan, you’re purchasing a property based on the developer’s plans and drawings — not a finished home. The property may not yet be built, or it might still be under construction. You’re essentially agreeing to buy something that doesn’t exist yet in its final form.
That can feel unsettling, but it’s a common and well-established way to purchase new-build homes. The key is going in with eyes open and the right professional support around you.
The Process: From Reservation to Completion
Buying off-plan follows a broadly similar path to a standard purchase, but with a few important differences in timing and structure.
Most developers will ask you to pay a reservation fee upfront — typically anywhere from a few hundred pounds to around £1,000 — to secure your chosen plot. This may be non-refundable, so make sure you’re confident before you pay it. Following the reservation, you’ll usually have a relatively short window (often 28 days or less) to exchange contracts, which is when you become legally committed to the purchase.
This is why it’s so important to instruct a solicitor as early as possible — ideally before you even pay the reservation fee. The timeline moves quickly, and there’s a lot of legal groundwork to cover.
What Your Solicitor Will Check
A solicitor experienced in new-build conveyancing will go through the developer’s contract in detail. This matters enormously, because off-plan contracts are often written firmly in the developer’s favour. Your solicitor’s job is to identify anything that needs challenging or clarifying.
Key things to look out for include:
- What’s actually included in the purchase price — fixtures, fittings, finishes
- The estimated completion date and the “long-stop date” (the latest legal deadline for the property to be finished)
- Any clauses that allow the developer to make changes to the design or specification
- Whether there are provisions to exit the contract if the build is significantly delayed
Getting these details nailed down in writing before exchange protects you if things don’t go exactly to plan.
One thing buyers often overlook: if you’ve had any verbal conversations with the developer’s site office — about upgrades, extras, or anything else agreed to secure your purchase — tell your solicitor straight away. Verbal agreements aren’t legally binding on their own. For anything discussed to be enforceable, it needs to be recorded in writing and included in the contract before exchange. Don’t assume that a promise made in the sales office will automatically carry through to completion.
Mortgages and Off-Plan: Plan Ahead
Securing a mortgage on an off-plan property needs careful management. Most mortgage offers are only valid for six months, but construction timelines can stretch considerably longer than that. If your offer expires before completion, you’ll need to reapply — and there’s no guarantee you’ll get the same deal, or any deal, second time around.
Speak to a mortgage broker early and look for lenders experienced with new-build properties. Some offer extended offer periods for off-plan purchases, which gives you more breathing space.
It’s also worth knowing that in Wales, you’ll pay Land Transaction Tax (LTT) rather than Stamp Duty Land Tax (SDLT). LTT has its own rates and thresholds — your solicitor can walk you through what you’re likely to owe based on the agreed purchase price.
The Snagging Inspection: Don’t Skip It
Before you complete on your new home, you have the right to inspect the finished property and flag any issues. This is known as a snagging inspection, and it’s one of the most important steps buyers skip — usually because they’re excited and just want to get moved in.
A professional snagging inspector can identify defects that aren’t immediately obvious: poorly fitted doors, misaligned tiles, incomplete insulation, and so on. Any issues should be raised with the developer before completion, while they still have the incentive to fix them. Once you’ve completed, getting things put right becomes significantly harder.
How Dudden Law Can Help
Buying off-plan can be a brilliant decision — but only when the legal side is handled properly from the start. At Dudden Law, our conveyancing team supports buyers across Cardiff and South Wales through every stage of the process, from reviewing the developer’s contract to managing completion and registering your new title.
We understand the pace that off-plan purchases demand, and we’ll make sure nothing catches you off guard.
Speak to Dudden Law Today If you’re considering buying a property off-plan, our team at Dudden Law is here to help. We offer a free first consultation so you can get clear, straightforward advice without any obligation.
Based in Cardiff and serving clients across South Wales and the UK, we’re ready to support you. Get in touch today — call us on 02921 320 150 or email property@duddenlaw.co.uk.
Insights from Aimmee Gregory, Dudden Law Solicitors