New Build Conveyancing: What Buyers Need to Know Before They Exchange

Buying a new build property feels exciting in a way that buying a second-hand home rarely does. You are choosing finishes, walking around a show home, and imagining the space as your own before a single brick has been laid on your plot. What most buyers do not realise until they are already in the process is that new build conveyancing works very differently from a standard purchase, and those differences carry real risks if you are not prepared for them.

The timescales are tighter. The contracts are drafted by the developer's solicitor, not yours. And the moment you exchange, you are legally committed to completing on a property that may not yet exist. Understanding the process before you instruct a solicitor is one of the most useful things you can do at the start of a new build purchase.

How New Build Conveyancing Works

The new build conveyancing process follows the same broad legal sequence as any residential purchase. Your solicitor will review the contract pack, carry out searches, raise enquiries, and handle the transfer of funds on completion day. What makes it different is the starting point and the pace.

The developer controls the contract

In a standard purchase, the contract is negotiated between two parties with broadly equal standing. In a new build transaction, the developer's solicitor prepares the contract pack, and it is prepared with the developer's interests in mind. That means clauses around exchange deadlines, reservation fees, estate charges, and longstop dates that you would rarely encounter in a second-hand sale.

Your solicitor's job is to review that contract in detail, flag anything that disadvantages you, and negotiate amendments where possible before you sign anything, this is not a formality.

Developer contracts regularly contain terms that buyers do not fully understand at the point of exchange, and some of those terms have significant financial consequences if the build is delayed or the property is not what was promised.

Why you should not use the developer's recommended solicitor

Most developers will suggest a solicitor for you, sometimes sweetening the offer with a contribution to legal fees. It is worth treating this with caution. A solicitor recommended and paid by the developer has a commercial relationship with that developer that a genuinely independent firm does not. Your solicitor should be working for you, not for the person selling you the property.

Choosing your own independent conveyancer and getting a new build conveyancing quote early in the process means you have a firm working in your interest from day one.

The New Build Conveyancing Timeline

The new build conveyancing timeline is almost always shorter than buyers expect, and the pressure comes from the developer's side rather than from you.

Exchange deadlines and what they mean

Developers typically require buyers to exchange contracts within 28 days of the reservation. In some cases it is as few as 21 days. This is one of the most significant differences between buying a new build and buying second-hand, where exchange timescales are negotiated between buyer and seller without a hard deadline imposed by one party.

The reason developers push for fast exchange is straightforward. Once you have exchanged, you have paid a deposit and you are legally committed to completing. Until you exchange, you can walk away. From the developer's perspective, the sooner you exchange the better.

For buyers, this creates pressure. Your solicitor needs to review and report on the contract pack, raise and receive responses to enquiries, and advise you fully, all within a tight window. Instructing a solicitor as early as possible, ideally at the reservation stage, gives your firm the maximum amount of time to do that properly.

What happens if your mortgage offer is delayed

Mortgage offers on new build properties often take longer to process than on standard purchases, partly because lenders apply different criteria to new builds and partly because valuations on off-plan properties can be more involved.

If your mortgage offer has not arrived by the time the developer wants you to exchange, you have a problem. Exchanging without a confirmed mortgage offer means you are committing to complete without certainty that the funds will be there. Most solicitors will advise strongly against this.

The best approach is to speak to your solicitor and mortgage broker at the same time and make sure everyone is aligned on the exchange deadline from the start. If the developer is pushing for an exchange before your mortgage offer is confirmed, your solicitor can request an extension, though whether the developer grants it is at their discretion.

Longstop dates

A longstop date is a contractual deadline by which the property must be built and ready for completion. If the developer fails to reach that date, you are usually entitled to walk away and recover your deposit.

Longstop dates protect buyers from being tied indefinitely to a delayed development, but they need to be read carefully. Some contracts give the developer the right to extend the longstop date unilaterally.

Others set a date that is so far in the future as to offer little practical protection. Your solicitor should review this clause in detail and advise you on whether the longstop provides meaningful protection in the context of your specific development.

Understanding the Developer Contract

The contract pack on a new build purchase typically contains more documents than a standard residential conveyance, and several clauses deserve particular attention.

Overage clauses

An overage clause gives the developer a financial interest in the property after you have bought it. If you sell the property within a specified period and the sale price exceeds a defined threshold, you may owe the developer a percentage of the uplift. These clauses are more common on new build properties in areas of significant future development, and they can affect your ability to sell freely in the future.

Estate management charges

Many new build developments include shared infrastructure - roads, green spaces, play areas, communal lighting - that is managed by a private management company rather than adopted by the local authority. As a buyer, you may be required to contribute to the cost of maintaining that infrastructure through an annual estate management charge.

These charges are not always disclosed prominently at the point of sale, and they can increase over time in ways that are difficult to challenge. Your solicitor should identify any such obligations in the contract and make sure you understand what you are committing to before you exchange.

Reservation fees

Most developers charge a reservation fee when you agree to buy a property, typically in the range of a few hundred to a few thousand pounds. This fee is usually deducted from the purchase price on completion, but if you pull out before exchange it is often non-refundable. Your solicitor should confirm the position on the reservation fee and what circumstances, if any, entitle you to a refund.

New Build Snagging: What You Need to Know

A new build snagging survey is one of the most important steps in the purchase process and one that many buyers either skip or carry out too late.

What a snagging survey covers

Snagging refers to the process of identifying defects and unfinished work in a new build property before or shortly after you take ownership. A professional snagging survey will check everything from paintwork and plasterwork to the installation of fixtures, fittings, doors, windows, electrics, plumbing, and heating systems.

A typical snagging list on a new build property might contain anywhere from a handful of minor items to well over a hundred issues on a larger home.

Should you snag before or after completion?

Ideally before, though developers do not always grant access for a pre-completion survey. If you can arrange one, carrying out the snagging survey before completion gives you leverage.

You can ask the developer to address identified defects before you complete, or in some cases use outstanding snagging as a reason to delay completion until the work is done.

If you cannot access the property before completion, you should carry out the survey as soon as possible after you move in.

Your legal rights are stronger in the period immediately after completion, and you are entitled to have the developer remedy defects during the warranty period, typically covered by an NHBC Buildmark warranty or a similar structural warranty product.

Snagging is separate from your conveyancing, but it runs alongside it, and your solicitor can advise on your legal position if the developer is unresponsive to defect notifications after completion.

New Build Lender Panel and Mortgage Considerations

The new build lender panel rules work in the same way as any other purchase. Your solicitor must be approved by your mortgage lender, and this applies regardless of whether the mortgage is on a new build or a second-hand property.

Some lenders apply specific criteria to new build mortgages, including restrictions on the maximum loan-to-value ratio on new build flats, requirements around the structural warranty in place, and in some cases a reduced maximum term on properties with certain types of construction.

It is worth confirming with your mortgage broker that the lender you are using is comfortable with the specific property before your solicitor gets too far into the conveyancing.

Lenders including Nationwide, Halifax, and Santander all offer new build mortgage products and operate panel systems that apply to those transactions. Getting a quote through a panel-matched comparison tool means every firm you see is already approved for your lender.

Help to Buy and shared equity schemes

If you are purchasing through a Help to Buy or shared equity scheme, the conveyancing process involves an additional party. The equity loan provider has its own legal interest in the property, which means additional documentation, additional reporting obligations for your solicitor, and in some cases additional fees.

Help to Buy conveyancing solicitors need to be experienced with the scheme's specific requirements. Not every firm handles equity loan transactions regularly, so it is worth confirming this when you get quotes.

How Much Does New Build Conveyancing Cost?

New build conveyancing fees are generally slightly higher than for a standard purchase of equivalent value, reflecting the additional work involved in reviewing developer contracts, dealing with estate management documentation, and in some cases handling equity loan requirements.

The main cost components are the solicitor's legal fee, conveyancing disbursements covering searches and Land Registry fees, and Stamp Duty Land Tax. On a new build, you may also see an engrossment fee on the developer's side, which is a charge for preparing the final version of the contract.

You can see the typical conveyancing fees when buying as a baseline, and then use the calculator to get a quote specific to a new build transaction at your property value. If you are buying in a specific location, the city-level calculator pages give you a more accurate picture - including for London, Birmingham, and Manchester, where a significant proportion of new build activity is concentrated.

A fixed-fee conveyancing quote is particularly worth seeking on a new build purchase, given the additional complexity. Fixed-fee means the legal costs are agreed upfront and do not increase if the transaction takes longer than expected, which on a new build is always a possibility.

Ready to Get New Build Conveyancing Quotes?

New build conveyancing is more involved than buying a second-hand property, but with the right solicitor instructed early and a clear understanding of the process, the risks are manageable.

Compare new build conveyancing quotes from panel-approved solicitors today and get a fixed-fee price before you commit to anything.