Back to Blog

What to Check in a New Build Contract Before Signing: Clause-by-Clause Guide to Reservation Agreements, Exchange Contracts, Longstop Dates, Penalty Clauses, and Red Flags

What to Check in a New Build Contract Before Signing: Clause-by-Clause Guide to Reservation Agreements, Exchange Contracts, Longstop Dates, Penalty Clauses, and Red Flags
Free PDF available for this topicDownload Solicitor Instruction Checklist

How New Build Contracts Differ from Resale Contracts

FeatureStandard Resale ContractTypical New Build Contract
Drafting basisLaw Society Standard Conditions of Sale (5th edition) — balanced between buyer and sellerDeveloper's bespoke contract — often uses the Standard Conditions as a base but with extensive amendments favouring the developer
NegotiationBoth solicitors negotiate terms freelyDeveloper's solicitor rarely agrees to amendments — 'take it or leave it' approach is standard
Completion dateFixed date agreed between partiesOften flexible — developer gives notice (10–14 days) when property is ready. Buyer must be ready to complete at short notice
DepositUsually 10% on exchange, held by seller's solicitor as stakeholderReservation fee (£500–£2,000) plus exchange deposit (5–10%). Developer may insist on deposit release rather than stakeholder
SpecificationYou buy what you seeYou buy based on plans and specifications that the developer may reserve the right to change
LengthTypically 10–20 pagesOften 30–60+ pages including special conditions, plans, specifications, and management provisions
Consumer protectionLimited — caveat emptor (buyer beware)Consumer Code for Home Builders applies, plus warranty protection

Part 1: The Reservation Agreement

The reservation agreement is the first document you sign, usually at the sales office. It is NOT the same as exchanging contracts — it is a preliminary commitment that holds the property for you while the legal process begins.

What the Reservation Agreement Should Contain

ClauseWhat to CheckRed Flag
Reservation fee amountTypically £500–£2,000. Should state the exact amount clearlyFees above £2,000 without justification. Some premium developments charge more, but this should be proportionate
Refund termsWhen and how the fee is refunded if the sale does not proceed. Consumer Code requires this to be clear'Non-refundable in all circumstances' — the Consumer Code says the fee should be refundable if the developer withdraws or changes the terms materially
Reservation periodHow long the reservation lasts — typically 28 days, sometimes 21 or 42Very short periods (14 days) that pressure you into exchanging before your solicitor has completed due diligence
What is reservedPlot number, house type, any agreed extras, upgrades, or incentivesVague descriptions. Everything agreed verbally must be in writing — if it is not in the reservation agreement, it does not exist
PriceThe purchase price and what it includesNo price stated, or price stated 'subject to change' — the price should be fixed at reservation
IncentivesAll agreed incentives (stamp duty contribution, flooring, appliances, deposit contribution) should be listedVerbal promises not documented. If the sales adviser offered you free flooring, it must be in the reservation agreement or it is not binding
ExclusivityConfirmation the developer will not sell the plot to someone else during the reservation periodNo exclusivity clause — means the developer could theoretically sell to a higher bidder

Consumer Code Requirements for Reservations

The Consumer Code for Home Builders (2024 edition) sets minimum standards:

RequirementWhat It Means
Pre-purchase informationDeveloper must provide key information about the property, including tenure, management arrangements, and any restrictions, before you reserve
No undue pressureYou must be given adequate time to consider the reservation and seek professional advice
Clear refund termsThe reservation agreement must state clearly what happens to your fee if the sale does not complete, including who decides and on what grounds
Independent legal adviceDeveloper must recommend you seek independent legal advice — not just suggest using their recommended solicitor

Part 2: The Exchange Contract — Clause by Clause

The exchange contract is the legally binding agreement. Once signed and exchanged, both parties are committed. Here is what each section typically contains and what to watch for.

Particulars of Sale

ItemWhat to Check
Property descriptionPlot number and address should match exactly. For off-plan, the description references plans attached to the contract
Title numberThe developer's master title number. Your individual title will be carved out from this after completion
Purchase priceMust match the agreed price. Check whether VAT applies (rare for residential but check)
Deposit amountUsually 10% of purchase price. Some developers accept 5%. Check whether the reservation fee is deducted from this
TenureFreehold or leasehold. If leasehold, the lease term and ground rent should be specified (ground rent must be peppercorn for new leases post-June 2022)
Completion date or mechanismEither a fixed date or a notice mechanism (developer gives X days' notice). The notice period is critical — check you have enough time to arrange mortgage drawdown and moving

The Deposit Clause

TermGood for BuyerBad for Buyer
StakeholderDeposit held by the developer's solicitor in a separate client account. If the developer goes bust, your deposit is protected
Agent for the sellerDeposit released to the developer immediately. If the developer becomes insolvent before completion, your deposit is at risk — you would be an unsecured creditor
Deposit Guarantee SchemeNHBC, Premier Guarantee, or LABC may provide deposit protection (typically up to £100,000)Check whether the warranty provider's deposit protection actually applies and what the limit is
Forfeiture clauseStandard — if you fail to complete, the developer can forfeit your depositSome contracts allow forfeiture AND additional damages claims against you. Your solicitor should review the scope

The Specification Clause

This defines what you are buying — the 'specification' of the property including materials, finishes, fixtures, and layout.

What to CheckWhy It Matters
Attached specification documentThere should be a detailed specification listing materials, fixtures, finishes, and fittings. Read it carefully — this is what you are contractually entitled to receive
Developer's right to varyMost contracts include a clause allowing the developer to substitute materials or make 'minor variations' without your consent. Check how broadly 'minor' is defined
'Equivalent or better' wordingSubstitutions should be of 'equivalent or better' quality. If the contract says 'at the developer's discretion' without quality protection, this is a red flag
Layout changesCan the developer change the internal layout? Some contracts reserve this right. If so, how significant can changes be?
External areasGardens, driveways, fencing, landscaping — check these are specified. 'Subject to final design' gives the developer wide latitude
Extras and upgradesAny extras you have paid for (upgraded kitchen, additional sockets, specific tiles) must be listed in the contract or a formal addendum. Verbal agreements are not enforceable

The Completion Clause

Clause TypeHow It WorksWhat to Watch For
Fixed completion dateA specific date is set for completion — you and the developer both know exactly whenRare for new builds unless the property is already finished. If offered, this is the best option for the buyer
Notice of completionDeveloper gives you notice (typically 10–14 days or 10 working days) that the property is ready. You must complete within that periodShort notice periods (5 working days) that do not give you enough time to arrange mortgage drawdown, which typically takes 5–7 working days itself
Estimated completion dateDeveloper provides a target date that is not binding. Actual completion may be earlier or laterNo contractual consequences if the developer misses the estimated date. Check what the longstop date says (see below)

The Longstop Date

The longstop date is the ultimate deadline for the developer to complete the property. It is one of the most important clauses in any new build contract.

AspectDetail
What it isThe final date by which the property must be completed and ready for handover. If the developer fails to meet this date, you can withdraw and recover your deposit
Typical length6–24 months after the expected completion date, depending on the developer and the stage of construction when you exchange
Your rights if triggeredYou can rescind (cancel) the contract and the developer must refund your deposit in full. You may also have a claim for compensation depending on the contract terms
Developer's rightsSome contracts allow the developer to extend the longstop date in certain circumstances (e.g., force majeure, planning delays). Check how broad these extension rights are
Red flagsVery long longstop periods (36+ months), wide developer extension rights, or clauses that make it difficult for you to actually exercise your right to withdraw

The Sunset Clause

A sunset clause allows one or both parties to cancel the contract if completion has not occurred by a specified date.

TypeEffectWho Benefits
Buyer sunset clauseYou can cancel and recover your deposit if the property is not completed by the sunset dateBuyer — this is essentially the longstop date by another name
Developer sunset clauseThe developer can cancel the contract and refund your deposit if they decide not to proceed (e.g., the development is not viable)Developer — allows them to walk away if market conditions change, property values fall, or they find a higher bidder
Mutual sunset clauseEither party can cancel after the sunset dateAppears balanced but the developer is usually in a stronger position — they get to keep building and selling other plots while you lose your purchase

Watch out for: Developer-only sunset clauses that allow the developer to cancel without your consent. This means you could exchange, wait months or years, and then have the contract cancelled because the developer found a better deal. Your solicitor should flag this as a serious concern.

Part 3: Special Conditions

New build contracts typically include a lengthy section of 'special conditions' that modify or add to the standard conditions. These are where the most buyer-unfriendly clauses tend to hide.

Common Special Conditions

ConditionWhat It SaysRisk LevelYour Solicitor Should
Variation of specificationDeveloper can change materials, layout, or design without your consent as long as changes are 'minor' or 'equivalent'MediumCheck how 'minor' and 'equivalent' are defined. Push for specific exclusions (e.g., kitchen units, bathroom suite, flooring)
Changes to the developmentDeveloper can change the wider development — alter layouts of neighbouring plots, change communal areas, add or remove amenitiesMedium–HighUnderstand what could change around your property. A promised park could become more housing. Views could be blocked
Access and servicesDeveloper retains right to access the property or neighbouring land for construction, utilities, or maintenanceLow–MediumCheck the scope and duration. Short-term access for completing the development is reasonable; permanent access rights need careful scrutiny
Restrictive covenants on the buyerRestrictions on what you can do with your property — no business use, no alterations without consent, no satellite dishes, specific fence types, no caravans or commercial vehiclesLow–MediumEnsure you can live with the restrictions. Some are reasonable (estate appearance); others may be overly restrictive
Developer's reserved rightsDeveloper keeps rights over your land for utilities, drainage, or access to other parts of the developmentMediumThese are often necessary for the development but should be proportionate and time-limited where possible
Estate management obligationsYou must join and contribute to a management company that maintains communal areasMedium–HighReview the management company structure, estimated charges, escalation provisions, and your rights as a member. See if charges are capped or can increase without limit
Transfer of title timingDeveloper may not transfer the freehold or common parts to the management company immediately — may take yearsMediumCheck when the freehold of communal areas transfers. Delays leave the developer in control of management decisions
Limitation of liabilityDeveloper limits its liability for defects, delays, or other issues to the minimum required by lawHighEnsure the limitation does not exclude the developer's liability for things they should be responsible for. The warranty provides a safety net but is not a substitute for developer responsibility

Part 4: Financial Clauses

ClauseWhat to CheckRisk
Deposit amount and timingHow much, when it is payable, and whether the reservation fee is deductedHigher deposits mean more money at risk if something goes wrong
Interest on late completionIf you fail to complete on the date given in the notice, the developer may charge you interest (typically 4–8% above base rate)This can be very expensive. Ensure the notice period gives you enough time to arrange everything
Apportionment of chargesGround rent, service charges, and council tax are usually apportioned — you pay from the date of completion onwardsCheck the apportionment basis. Some contracts calculate unfairly
Developer incentivesAll incentives must be documented. Check whether incentives affect the purchase price (they must be disclosed to your lender)Incentives above 5% of purchase price can reduce the amount your lender will advance
Additional paymentsSome contracts require additional payments beyond the purchase price — management company joining fees, connection fees, or infrastructure contributionsAny additional costs should be disclosed before exchange. Ask your solicitor for a complete list of all money you will need to pay

Part 5: Leasehold-Specific Contract Clauses

If your new build is leasehold (flats and some houses), the contract will reference a lease that forms part of the agreement.

Lease ClauseWhat to CheckPost-2022 Position
Lease lengthHow many years? 125 years is common; 999 years is better. Lenders typically require at least 85 years remainingNew leases are still commonly 125 or 999 years
Ground rentAnnual amount payable to the freeholderMust be peppercorn (zero) for new leases granted after 30 June 2022 under the Leasehold Reform (Ground Rent) Act 2022. Any ground rent above zero on a new lease is unlawful
Service chargesEstimated annual amount, what it covers, how it is calculated, and review/challenge rightsReview carefully — service charges on new developments can be high (£1,500–£4,000+ per year for flats) and may increase
Sinking fund / reserve fundContributions towards future major works (roof repairs, lift replacement). Some leases require these from day oneA sinking fund is good practice — it means large bills are spread over time rather than hitting you all at once
Permitted useUsually 'residential only' — check whether working from home is restrictedMost modern leases permit home working but may restrict business signage or client visits
AlterationsWhat changes you can make with and without consentMost leases require freeholder consent for structural changes and sometimes for non-structural internal changes too
Assignment (selling on)Can you sell freely or does the freeholder need to consent?Consent should not be unreasonably withheld — check the fee structure for granting consent
SublettingCan you let the property? Some leases restrict thisIf you might need to let the property in future, check the lease allows it (some shared ownership leases restrict subletting)
InsuranceWho insures the building and how much the 'insurance rent' isThe freeholder usually insures. Check the cost is reasonable and you can see the policy

Contract Red Flags — What Should Concern You

Red FlagWhy It Is ConcerningWhat to Do
Very short notice of completion (5 working days or less)Not enough time to arrange mortgage drawdown, which takes 5–7 working daysYour solicitor should push for at least 10 working days' notice. If the developer refuses, understand the risk that you may need to borrow short-term or ask your lender to prepare in advance
Deposit released to developer (not held as stakeholder)Your deposit is at risk if the developer becomes insolventRequest stakeholder holding. If refused, check the warranty provider's deposit protection scheme and its limits
Wide specification variation rightsYou could receive a property with different materials, layout, or finishes from what you expectedAsk for specific protections for key items (kitchen, bathroom, flooring) or a right to withdraw if changes are material
Developer sunset clause allowing cancellationDeveloper can walk away from the deal, even after you have waited monthsYour solicitor should flag this prominently. Consider whether you are comfortable with this risk
Very long longstop date (36+ months)You could be locked in for years waiting for a property that may never be finishedPush for a shorter longstop date. If refused, understand your maximum exposure period
No snagging provisionsNo contractual right to inspect before completion or to have defects fixedThe Consumer Code gives you a right to a pre-completion inspection. Ensure the contract does not override this
Escalating estate management chargesManagement charges that can increase without limit, leaving you with rising annual costsAsk for estimates of future charges and any cap provisions. Understand your rights to challenge unreasonable charges
Ground rent above peppercorn (post-June 2022)Unlawful for new residential leasesThis should never appear in a new lease. If it does, your solicitor should refuse to proceed until corrected
Restriction on choosing your own solicitorDeveloper insisting you use their solicitor creates a conflict of interestYou have the right to independent legal advice. Refuse any pressure to use the developer's solicitor exclusively
Penalty interest rates above 8% over baseExcessive penalty if you are late completing — far above commercial ratesYour solicitor should negotiate this down or highlight it clearly so you understand the financial risk of any delay on your side

What Your Solicitor Should Do with the Contract

Solicitor's TaskWhat You Should Expect
Full reviewYour solicitor reads every clause and highlights anything unusual, unfair, or concerning
Raise enquiriesSends questions to the developer's solicitor about ambiguous or missing provisions
Attempt amendmentsRequests changes to the most buyer-unfriendly clauses. The developer may refuse, but your solicitor should try
Report to youProvides a clear, jargon-free explanation of what the contract says, what the risks are, and what they recommend
Flag deal-breakersIf there are clauses that pose serious risks (deposit exposure, developer sunset, excessive variation rights), your solicitor should tell you clearly and explain the worst-case scenario
Confirm Consumer Code complianceChecks the contract meets Consumer Code requirements — pre-purchase information, reservation terms, warranty, complaints procedure
Check mortgage compatibilityEnsures the contract terms meet your lender's requirements under the UK Finance Handbook

For more on what solicitors do during the conveyancing process, see our guide to why you need a new build solicitor.

Negotiating Contract Terms

Developers are reluctant to amend their standard contracts, but negotiation is not impossible — especially in a slower market or for higher-value properties.

What You Can Reasonably Negotiate

TermChance of SuccessHow to Approach
Notice period for completionMediumRequest 10 working days minimum. Explain that your mortgage lender needs this time to release funds
Deposit held as stakeholderLow–MediumSome developers agree, especially for higher-value plots. Worth asking
Specification protectionsMediumRequest that specific items (kitchen brand/range, bathroom suite, flooring) cannot be changed without your consent
Longstop date reductionLowDeveloper sets this based on their construction programme. Push for the shortest period they will accept
Removal of developer sunset clauseLowSome developers will remove this. Most will not. Make sure you understand the implication if they refuse
Cap on management chargesLowManagement charges are usually set by the management company, not the contract. But you can ask for first-year estimates to be capped
Interest rate reduction on late completionMediumPush for base rate + 4% rather than base rate + 8%. Some developers agree

Negotiation Tips

TipDetail
Let your solicitor negotiateContract amendments are solicitor-to-solicitor communications. Do not try to negotiate legal terms through the sales office
Pick your battlesFocus on the 2–3 most important issues rather than trying to change everything. Developers are more likely to concede on a few points than on many
Market conditions matterIn a slow market with unsold stock, developers are more flexible. In a hot market, you have less leverage
Document everythingAny agreed amendments must be in writing as formal contract variations. Verbal agreements with the sales team are not enforceable
Be prepared to walk awayIf the contract terms are genuinely unacceptable and the developer will not negotiate, walking away (and recovering your reservation fee under Consumer Code grounds) may be the right decision

Transfer Deed and Plans

The transfer deed (TR1 form) is the document that actually transfers ownership from the developer to you at completion. Your solicitor reviews this alongside the contract.

What to CheckWhy
Property boundaries on the planEnsure the plan accurately shows your plot boundaries, including any garden, driveway, garage, and parking space. Errors here can cause boundary disputes later
Rights granted to youRights of way over communal roads, paths, and shared areas. Rights to use drainage, utilities, and shared facilities
Rights reserved by the developerRights the developer keeps over your land — for example, rights to lay pipes, access for maintenance, or pass over your land to reach other plots
Restrictive covenantsObligations you are bound by — maintaining fences, not running a business, keeping the property appearance consistent with the development
Positive covenantsObligations to do something (rather than not do something) — contributing to estate maintenance, maintaining boundary walls. Positive covenants can be harder to enforce against future buyers but estate management structures usually address this
Indemnity covenantsYou may be asked to indemnify the developer against future claims relating to the covenants. Standard but check the scope

Warranty and Defects Clauses

ClauseWhat It Should SayWatch Out For
Warranty provider namedNHBC Buildmark, Premier Guarantee, LABC, or another approved provider clearly identifiedNo warranty specified or an unfamiliar provider that your lender may not accept
Defect liability periodDeveloper is responsible for fixing defects in years 1–2 (the 'builder period'). Clear process for reporting and resolutionDeveloper limiting their defect liability to 'structural defects only' during years 1–2. The warranty builder period should cover all construction defects, not just structural
Snagging rightsYour right to inspect before completion and submit a snagging list within a reasonable period after moving inNo snagging provision or very short deadlines (7 days) for reporting defects after completion
Relationship between warranty and contractClear explanation of how contract defect claims relate to warranty claimsContract wording that makes the warranty your 'sole remedy' — effectively waiving your contractual rights against the developer in favour of the warranty provider

For detailed warranty information including how to make claims, see our after-sales and warranty guide.

Contract Review Checklist

ItemChecked?
Purchase price matches agreed amount
Plot number and description are correct
Deposit amount and payment mechanism clear
Deposit protection (stakeholder vs agent) understood
Completion date or notice mechanism reviewed
Longstop date identified and acceptable
Specification document read and acceptable
Developer's variation rights understood
All agreed incentives/extras documented
Warranty provider identified and acceptable to lender
Defect reporting process clear
Estate management charges estimated
Lease terms reviewed (if leasehold)
Ground rent confirmed as peppercorn (if new lease)
Restrictive covenants reviewed and acceptable
Plans and boundaries checked
Interest rate for late completion noted
Sunset clause (if any) understood
All additional costs identified
Solicitor's report read and questions asked

Frequently Asked Questions

Can I negotiate a new build contract?

You can try. Developers are reluctant to amend their standard contracts because they use the same terms for all buyers on the development. However, some clauses (notice period, specification protections, interest rates) can sometimes be negotiated, especially in slower markets. Your solicitor handles negotiations on your behalf — solicitor-to-solicitor communication is the standard process.

What happens if the developer changes the specification after I have exchanged?

Most contracts allow the developer to make 'minor' substitutions of 'equivalent or better' quality. If the developer makes a material change that significantly affects what you are receiving, you may have grounds to rescind the contract or claim compensation. The definition of 'minor' and 'material' is often the point of dispute — which is why your solicitor should push for tighter specification protections before exchange.

Should I be worried about deposit release?

If your deposit is released to the developer rather than held as stakeholder, it is at risk if the developer becomes insolvent. Most large developers are financially stable, but insolvencies do happen. Check whether the warranty provider offers deposit protection (NHBC covers up to £100,000 per home under Buildmark). If there is no deposit protection and the developer insists on release, your solicitor should advise you on the risk clearly.

What is a Section 106 agreement and should I care?

Section 106 of the Town and Country Planning Act 1990 allows local authorities to require developers to provide affordable housing, infrastructure, or community facilities as a condition of planning permission. These obligations are attached to the land and can affect the development (e.g., restrictions on selling certain plots at market price, ongoing maintenance obligations). Your solicitor should check whether any Section 106 obligations affect your specific plot.

How long should I spend reviewing the contract?

Take as long as you need. The Consumer Code gives you the right to adequate time to review and seek advice. Do not let the sales team pressure you into exchanging before your solicitor has completed their review. If the reservation period is too short for thorough due diligence, ask for an extension. If the developer refuses, consider whether this pressure tactic is a red flag about how they operate.

What if my solicitor says the contract is fine but I am still worried?

Ask your solicitor to explain the specific clauses that concern you. A good solicitor will walk you through each clause in plain English and explain the worst-case scenario. If you remain uncomfortable, you can seek a second opinion from another solicitor. The cost of a second review (typically £200–£500) is small compared to the risk of signing a contract you do not understand.

Property Assistant

Ask me anything