Why a Pre-Exchange Checklist Is Essential
Exchange of contracts is the point of no return in any property transaction, and this is doubly true when purchasing a new build home. Once you exchange, you are legally committed to the purchase — pulling out after this stage means forfeiting your deposit (typically 10% of the purchase price) and potentially facing a claim for damages from the developer. In a new build context, the stakes are even higher because many elements of the property may not yet exist in their finished form, and the legal framework is more complex than a standard resale purchase.
This comprehensive checklist covers every item your solicitor or licensed conveyancer should have confirmed, reviewed, or resolved before you sign on the dotted line. Whether you are a first-time buyer purchasing a new build or an experienced investor, understanding what needs to be in place before exchange gives you confidence that your purchase is legally sound.
Important: This guide covers the legal position in England & Wales. The conveyancing process in Scotland follows a different system (with missives rather than exchange of contracts), and Northern Ireland has its own procedural variations. If you are buying in Scotland or Northern Ireland, consult a solicitor qualified in the relevant jurisdiction.
Disclaimer: This article provides general guidance on the conveyancing process for new build homes. It does not constitute legal advice. Every transaction is different, and you should always consult a qualified solicitor or licensed conveyancer for advice tailored to your specific circumstances.
Title & Ownership Checks
Before exchange, your solicitor must carry out a thorough examination of the title to the property you are purchasing. In a new build context, this is more involved than a standard resale because the developer is often selling off part of a larger title, and new rights and obligations are being created for the first time.
What Your Solicitor Should Verify
- Developer’s title: Confirm the developer actually owns the land and has the legal right to sell individual plots. This involves examining the Land Registry title and any relevant planning consents.
- Title plan accuracy: Check that the title plan accurately reflects the boundaries of your specific plot, including any garden, parking space, or allocated areas. New build title plans are often prepared from architect’s drawings before the development is complete, so discrepancies can occur.
- Easements and rights: Identify all easements (rights of way, drainage rights, rights to run services) that benefit or burden the property. On a new build estate, these are typically granted as part of the estate adoption and infrastructure agreements.
- Mines and minerals: Check whether mineral rights are included or have been reserved by a third party. In some parts of England & Wales (particularly former mining areas), the Coal Authority or other bodies may hold mineral rights.
- Chancel repair liability: Although now largely addressed by insurance, your solicitor should check whether the property falls within a parish where chancel repair liability might apply.
- Freehold or leasehold: Confirm whether you are purchasing the freehold or a leasehold interest. If leasehold, the draft lease must be reviewed in detail (see below).
Title Issues Specific to New Builds
| Title Issue | What It Means | Action Required |
|---|---|---|
| Unregistered land | The development site may not yet be registered at Land Registry with individual plot numbers | Solicitor files first registration after completion; verify epitome of title documents |
| Retained land provisions | Developer retains parts of the estate (roads, open spaces) and grants rights over them | Ensure all necessary rights of access and services are expressly granted in the transfer deed |
| Development-wide covenants | restrictive covenants imposed by the developer across all plots | Review all covenants carefully; ensure they are reasonable and you can comply |
| Overage or clawback clauses | Developer may include clauses requiring additional payment if you obtain planning permission for further development | Negotiate removal or limitation of overage provisions; understand the trigger events |
| Shared ownership title | If purchasing through shared ownership, the title structure is a lease with a housing association | Lease terms must comply with Homes England requirements; review staircasing provisions |
Searches & Survey Results
Property searches are a fundamental part of the conveyancing process. They reveal information about the property and its surroundings that may not be apparent from a physical inspection. For new builds, certain searches take on particular importance because the area around your property may still be undergoing significant change.
Essential Searches for New Build Purchases
Your solicitor should have received satisfactory results for all of the following legal searches before exchange:
- Local authority search (LLC1 and CON29R): This reveals planning permissions, building control records, road adoption status, tree preservation orders, conservation areas, smoke control zones, and contaminated land entries. For new builds, pay particular attention to any planned developments nearby and the status of roads and sewers on the estate.
- Environmental search: Identifies potential contamination risks, flood zones, ground stability issues, and proximity to landfill sites. Many new build developments are on brownfield land (previously developed), making this search especially important.
- Water and drainage search: Confirms water supply and sewerage connections, whether the property is connected to mains drainage, and the location of public sewers. Check whether the estate’s drainage infrastructure has been or will be adopted under Section 104 agreements.
- Flood risk assessment: Even if the environmental search covers flood risk at a basic level, a dedicated flood search may be necessary, particularly if the development is near a river, coast, or in an area with known surface water flooding issues.
- Chancel repair search: Determines whether the property may be liable for contributions to the repair of the local parish church — an ancient liability that can still affect modern properties.
- Mining search (where applicable): In areas with a history of coal mining or other mineral extraction, a mining search is essential. Subsidence from old mine workings can be a serious issue.
- HS2, Crossrail, or other infrastructure searches: If the development is in an area potentially affected by major infrastructure projects, specific searches may be required.
Survey Considerations for New Builds
Although mortgage lenders typically require only a basic valuation for new build properties (relying on the NHBC or similar warranty), you may still wish to commission an independent snagging survey before or shortly after completion. While a full structural survey is unusual for a brand-new home, a snagging inspection identifies defects in workmanship and finish that should be rectified under the builder’s warranty period.
Before exchange, satisfy yourself that the lender’s valuation has been received and that it confirms the property is worth at least the purchase price. If the valuation comes in below the agreed price, you have a negotiation point — but this must be resolved before exchange, not after.
Mortgage Offer & Financial Arrangements
Your financial arrangements must be absolutely watertight before exchange. Once you exchange contracts, you are legally obliged to complete on the agreed date, and failure to do so can result in severe financial penalties.
Mortgage Offer Checklist
- Formal mortgage offer received: You must have a formal written mortgage offer (not just an agreement in principle) from your lender. Your solicitor should hold a copy and have reviewed all conditions.
- Offer validity period: Mortgage offers typically remain valid for 3–6 months from the date of issue. For new builds being purchased off-plan, the completion date may be many months away. If the mortgage offer might expire before completion, your solicitor should raise this issue and you should discuss an extension with your lender before exchange.
- Special conditions satisfied: Mortgage offers often include special conditions (such as satisfactory searches, proof of buildings insurance, or confirmation of a particular warranty provider). These must all be met.
- Incentives disclosed: If the developer is offering any incentives (cashback, contribution to stamp duty, free upgrades, furniture packs), these must be fully disclosed to your lender. Failure to declare incentives can constitute mortgage fraud and may lead to the lender withdrawing the offer or, in extreme cases, criminal prosecution.
- Deposit funds confirmed: Verify that the deposit (usually 10% of the purchase price, less any reservation fee already paid) is available and ready to be transferred. The deposit must come from a legitimate and verifiable source — anti-money laundering regulations require your solicitor to verify the origin of all funds.
Financial Position Summary
| Financial Item | Status Required Before Exchange | Risk If Not Confirmed |
|---|---|---|
| Formal mortgage offer | Received, reviewed, all conditions met | Cannot complete; lose deposit |
| Offer validity | Valid through expected completion date | Offer expires; must reapply (rates may change) |
| Deposit funds | Source verified, funds accessible | Exchange delayed or impossible |
| Stamp Duty calculation | Confirmed and funds allocated | Unexpected cost at completion; SDLT surcharges if second property |
| Solicitor’s fees & disbursements | Estimate received and agreed | Unexpected costs at completion |
| Developer incentives | Fully disclosed to lender | Mortgage fraud risk; offer withdrawal |
Contract Review & Completion Date
The contract for a new build purchase is typically drafted by the developer’s solicitor and will be based on the developer’s standard terms. This means it is likely to be weighted in the developer’s favour, and your solicitor’s role is to negotiate amendments that provide you with adequate protection.
Key Contract Terms to Review
Your solicitor should have carefully reviewed and, where necessary, negotiated the following aspects of the new build contract:
- Purchase price and payment terms: Confirm the agreed price, deposit amount, and how the balance is to be paid on completion. Check whether there are any additional charges (for example, a contribution to estate infrastructure costs or management company set-up fees).
- Completion date or notice period: new build contracts typically allow the developer to give a notice of completion (often 10–14 working days’ notice) rather than specifying a fixed date. Your solicitor should negotiate the longest possible notice period to give you time to arrange the final mortgage advance and move logistics.
- Long-stop date: This is the backstop date by which the property must be completed and ready for handover. If the developer fails to meet this date, you should have the right to withdraw from the contract and reclaim your deposit. Ensure the long-stop date is reasonable (typically 12–18 months from exchange for properties under construction).
- Specification and finish: The contract should include a detailed specification of what is included in the purchase price. This should cover everything from kitchen appliances and flooring to garden landscaping and boundary treatments. Any upgrades or extras you have agreed should be documented in writing.
- Defects liability period: The contract should set out the developer’s obligations to remedy defects discovered after completion, typically for a period of two years.
- Forfeiture provisions: Understand what happens if either party fails to complete. The standard position is that you forfeit your deposit if you fail to complete, but more onerous penalties (such as a claim for the developer’s losses in reselling at a lower price) should be resisted.
- Substitution of materials: Developers often reserve the right to substitute specified materials for alternatives of “similar quality.” Your solicitor should ensure this clause is not too broad and that any substitutions do not materially alter the specification.
Completion Date Considerations
Unlike a standard resale where both parties agree a fixed completion date at exchange, new build completions are typically triggered by a notice from the developer once the property passes its final building control inspection. This creates uncertainty, so you should:
- Ensure the contract gives you adequate notice (at least 10 working days, ideally 14) before completion.
- Confirm the long-stop date is clearly defined and provides you with the right to rescind if the developer is late.
- Check whether the contract allows for interest or compensation if completion is delayed beyond the anticipated date.
- Understand that if a fixed completion date is agreed and you fail to complete on that date, the developer can serve a notice to complete (typically giving you 10 working days) and, if you still fail, keep your deposit.
NHBC Warranty Registration & Section 38 and Section 104 agreements and 104 Agreements
New build warranties and infrastructure adoption agreements are critical elements that must be confirmed before exchange. Without a proper warranty, your lender may refuse to release the mortgage advance, and without adoption agreements, you could be left paying for the maintenance of roads and sewers on the estate.
Structural Warranty Requirements
Your solicitor should confirm that the property will benefit from a recognised structural warranty. The most common provider is the NHBC Buildmark warranty, but other accepted providers include:
- NHBC Buildmark (the most widely recognised)
- Premier Guarantee
- LABC Warranty
- Zurich and Building LifePlans
- Checkmate (ICW)
Your solicitor must verify that the developer is registered with the warranty provider, the property is enrolled for cover, and the warranty documentation will be available at completion. Most mortgage lenders require an acceptable warranty as a condition of lending, so this is not negotiable.
Section 38 & Section 104 Agreements
These agreements are vital for understanding who is responsible for the roads and drainage infrastructure on the new build estate:
| Agreement | Purpose | Why It Matters |
|---|---|---|
| Section 38 (Highways Act 1980) | Agreement with local highway authority for adoption of roads on the estate | Without adoption, residents may be responsible for road maintenance costs indefinitely |
| Section 104 (Water Industry Act 1991) | Agreement with water company for adoption of sewers and drainage | Without adoption, homeowners may bear the cost of maintaining shared drainage infrastructure |
If these agreements are not yet in place (which is common on developments still under construction), your solicitor should obtain confirmation from the developer that they will be entered into, together with a timetable for adoption. In some cases, a developer may use a management company instead of seeking formal adoption, which has different implications for ongoing costs.
Management Company Pack & Restrictive Covenants
Most modern new build estates include communal areas, shared facilities, and landscaped open spaces that require ongoing maintenance. Understanding how these are managed — and what it costs — is essential before you exchange contracts.
Management Company Review
If the estate has a residents’ management company (RMC), your solicitor should have reviewed the full management company pack, including:
- Memorandum and articles of association: The constitutional documents of the management company, setting out its purpose, powers, and how it is governed.
- Service charge budget: An estimate of the annual costs for maintaining communal areas. This should include grounds maintenance, lighting, cleaning, insurance, and any sinking fund contributions.
- Transfer provisions: How and when ownership of communal areas will transfer from the developer to the management company.
- Membership obligations: Confirm that you will automatically become a member of the management company and understand your voting rights and obligations.
- Estate management deed or covenant: The legal mechanism by which service charges are collected and enforceable against homeowners.
Restrictive Covenants Review
New build properties almost always come with restrictive covenants imposed by the developer. These are legally binding restrictions on what you can and cannot do with your property. Common examples include:
- No business or commercial use of the property
- No caravans, motorhomes, or commercial vehicles to be kept on the property
- Restrictions on exterior alterations without developer or management company consent
- Fencing restrictions (type, height, and materials)
- No satellite dishes on front elevations
- Maintenance obligations for your property’s exterior
Your solicitor should explain all restrictive covenants to you and flag any that might affect your intended use of the property. Once you exchange contracts, you are accepting these covenants, so any concerns must be raised and resolved beforehand.
The Complete Pre-Exchange Checklist
To bring together all of the elements discussed above, here is a consolidated checklist that your solicitor should work through before exchange. You can use this as a reference to ensure nothing has been overlooked:
| Category | Checklist Item | Confirmed? |
|---|---|---|
| Title | Developer’s ownership and right to sell verified | □ |
| Title | Title plan matches the plot you are purchasing | □ |
| Title | All easements and rights clearly defined | □ |
| Searches | Local authority search completed and satisfactory | □ |
| Searches | Environmental and flood risk searches clear | □ |
| Searches | Water and drainage search confirms connections | □ |
| Finance | Formal mortgage offer received and reviewed | □ |
| Finance | Mortgage offer valid through anticipated completion date | □ |
| Finance | Deposit source verified and funds available | □ |
| Contract | Purchase price and specifications confirmed | □ |
| Contract | Completion notice period adequate (10–14 working days) | □ |
| Contract | Long-stop date clearly defined with right to rescind | □ |
| Warranty | NHBC or equivalent warranty confirmed and enrolled | □ |
| Infrastructure | Section 38 agreement for roads confirmed or planned | □ |
| Infrastructure | Section 104 agreement for drainage confirmed or planned | □ |
| Management | Management company pack reviewed | □ |
| Covenants | All restrictive covenants understood and acceptable | □ |
| Leasehold (if applicable) | Lease terms reviewed, ground rent confirmed | □ |
If any item on this list has not been resolved to your solicitor’s satisfaction, do not exchange contracts. It is far better to delay exchange by a few days or weeks than to commit to a purchase with unresolved legal issues. Developers may apply pressure to exchange quickly, but a good solicitor will resist this pressure on your behalf and ensure everything is properly in order.
Frequently Asked Questions
Can I exchange contracts before all searches are back?
Technically, it is possible to exchange with search indemnity insurance in place of certain searches, but this is not recommended for new build purchases. Search results can reveal issues specific to new developments — such as planned infrastructure, contamination risks, or adoption status — that indemnity insurance would not resolve. Your solicitor should advise strongly against exchanging until all essential searches have been received and reviewed. The cost of a few weeks’ delay is negligible compared to the risk of exchanging with unknown liabilities.
What happens if my mortgage offer expires between exchange and completion?
This is a significant risk with off-plan new build purchases, where the gap between exchange and completion can be several months. If your mortgage offer expires, you will need to apply for an extension or a new mortgage. If your financial circumstances have changed or interest rates have risen, the new offer may be on less favourable terms — or you may not qualify at all. You would still be legally obliged to complete, and failure to do so could result in forfeiture of your deposit. To mitigate this risk, discuss the timeline with your lender before exchange and, if possible, negotiate a mortgage offer with an extended validity period.
Should I have the contract reviewed by a solicitor who specialises in new builds?
Yes, it is strongly recommended. New build conveyancing is significantly more complex than a standard resale transaction. A solicitor with experience in new build purchases will be familiar with the typical developer contract terms, know which clauses to challenge, understand the warranty registration process, and be able to navigate the additional complexities of leasehold properties, management companies, and adoption agreements. While any qualified solicitor can handle a new build purchase, experience in this area is a genuine advantage.
Can the developer change the specification after exchange?
This depends on the terms of the contract. Most new build contracts include a clause allowing the developer to make “minor variations” to the specification, typically subject to the finished product being of “similar quality” to the original specification. Your solicitor should negotiate this clause to ensure it is not unreasonably broad. Major changes to the layout, size, or specification of the property after exchange would typically require your consent. If you are concerned about specification changes, ask your solicitor to negotiate a clause requiring written notice of any variations.
What if I discover an issue after exchange but before completion?
After exchange, your options are more limited. You cannot simply withdraw without forfeiting your deposit (and potentially facing a claim for additional losses). However, if the issue is something the developer failed to disclose or misrepresented, you may have legal remedies under misrepresentation law. If a search reveals a new issue (for example, a planning application for an unwanted development nearby that was submitted after your search date), your solicitor can advise on whether this constitutes grounds for rescinding the contract. The key message is that thorough pre-exchange due diligence is the best protection.
Conclusion: Protect Yourself Before You Commit
Exchanging contracts on a new build home is a major legal and financial commitment. The checklist set out in this guide covers the essential elements that your solicitor should have addressed before you reach this critical milestone. From title checks and searches to mortgage arrangements and contract terms, every element plays a role in protecting your interests.
The most important advice is this: do not rush to exchange. Developers often set tight deadlines and may suggest that your plot will be offered to another buyer if you do not exchange quickly. While there may be commercial pressure to move quickly, your solicitor’s duty is to protect your legal interests, and that means ensuring every item on the checklist has been properly resolved.
If you are preparing to exchange on a new build home, make sure your solicitor provides you with a clear report on each of the items covered in this guide. If anything is unclear or unresolved, ask questions — it is far better to address issues now than after you have committed £10,000 or more in deposit money.
For more information on the conveyancing process, see our guides to the new build buying process step by step and essential paperwork for new build buyers.
This article provides general information about the conveyancing process for new build homes in England & Wales. It does not constitute legal advice. Always seek professional legal advice from a qualified solicitor or licensed conveyancer before making decisions about your property purchase.