Overage agreements, also called uplift or clawback arrangements, allow a seller to share in any future increase in the value of land after planning permission, development or onward sale. They are quite common where land has potential value for further development after the time of sale.
There is no standard form of overage agreement. Nearly every clause is negotiable, and the right structure depends on various factors including the potential uplift in value, the specifics of land, the planning position, the parties’ funding arrangements and commercial objectives.
With so many variables to consider, experience of similar situations, creative solutions and antocipating issues, good negotiation and careful drafting, are essential to ensure the document covers the key points such as timing, triggers, valuation, planning obligations, resale restrictions and successor liability.
Our property team regularly advises developers, landowners, institutions and investors on overage arrangements.
Quick Summary: 5 Key Things to Consider in Any Overage Deal
What event triggers payment?
How long should the overage obligations last?
Will the overage bind future owners or only the original buyer?
How is the uplift payment calculated?
Will the overage terms be acceptable to any lender for the buyer?
How Overage works with the standard conveyancing process
Overage operates alongside the standard property sale contract. The overage provisions will be agreed during the contract negotiation stage, and once contracts are exchanged, the seller and buyer both have obligations to complete the sale and enter into the overage deed. Buyers often need lender approval before exchanging where overage is involved.
At completion, ownership transfers and the overage becomes legally binding. A Land Registry restriction is usually registered to ensure that overage obligations are preserved on any future sales. The arrangement then runs for an agreed period, anywhere from five to thirty years.
Triggers for uplift and planning considerations
Triggers vary widely and must be defined with precision. Common ones include:
Grant of planning permission (outline or detailed)
Implementation of planning permission
Onward sale at a higher value
Completion or occupation of development
Profit thresholds in more complex developments
Planning-linked triggers require clarity on variations, prior approvals and whether permissions must be capable of implementation. Sale-based triggers need clear definitions of “price”, including incentive arrangements or SPV share sales.
Some agreements include planning obligations, such as requiring an application within a set period, pursuing a similar scheme, or appealing refusals. These need to balance the seller’s interest with the buyer’s ability to adapt to viability and planning feedback.
Successor liability and onward sales
A key question is whether overage should bind future buyers if the trigger event has not yet occurred. This is not automatic, but it is often recommended or preferable, particularly where value may not arise until a future buyer secures planning consent or develops the land.
A practical approach usually includes:
A deed of covenant from new owners – this ensures that anyone who acquires the land steps into the buyer’s shoes and takes on the overage obligations. It avoids gaps in liability and gives the seller direct rights against future owners without needing to rely on the original buyer.
A title restriction preventing sales unless successors are bound – registered at the Land Registry, this restriction stops the land being transferred unless the seller has evidence that the incoming owner has signed the required deed of covenant. It is the main mechanism that makes overage enforceable over the long term.
Simple procedures for parcel-by-parcel disposals – many development sites are sold in phases or split between multiple housebuilders. The overage should include a clear, easy process for binding each purchaser, typically a short-form deed of covenant, so disposals are not delayed and the overage remains intact.
Allowances for intragroup transfers – developers frequently reorganise ownership structures for funding, tax or JV reasons. Most agreements permit transfers within the same corporate group, provided the new entity signs up to the overage. This protects the seller while allowing normal commercial flexibility.
Targeted protection against undervalue sales or SPV share transfers – without these protections, value could be shifted out of the land through discounted disposals or by selling the shares in the land-owning SPV. Carefully drafted anti-avoidance clauses ensure that genuine transactions can proceed while preventing the buyer from sidestepping overage through structuring.
Some deals also include uplift on onward sale to guard against early profit-taking. Where uplift is expected quickly or the parties want maximum simplicity, it may be appropriate for the overage to apply only to the original buyer.
Payment Structures
Most overage arrangements fall into one of the following models, and choosing the right one depends on how and when value is likely to be realised. Each has different implications for risk, cashflow and complexity.
Percentage uplift on planning - A calculation based on the difference between the land’s value with and without planning permission. Useful where planning is the main driver of value, but depends on agreed valuation assumptions such as the terms of a section 106 agreement. Popular for strategic and greenfield land.
Per-unit payments - A fixed sum payable for each residential unit (or sometimes each square foot/metre) permitted or delivered. Simple, predictable and lender-friendly. Works well where density is broadly predictable, and avoids valuation disputes. Needs thought where affordable housing or tenure mix might change.
Lump-sum payments tied to defined planning outcomes - A one-off payment if a specific event occurs, for example, securing consent for a minimum number of units or a particular use. Best suited to binary outcomes. Clarity is needed on what happens if the final outcome is just above or below the threshold.
Profit-based arrangements - A share of the actual development profit once the scheme is built out or sold. Useful where remediation, infrastructure or abnormal costs make the uplift uncertain. Requires careful agreement on allowable costs (e.g., finance, preliminary investigations, professional fees), evidence requirements, and whether profits/losses can be pooled across phases.
Each structure has its strengths and weaknesses. Choosing the right one is often a question of matching the mechanism to the land and the development strategy.
Common Pitfalls
Overage agreements can remain in place for many years, sometimes long after the original parties have sold or reorganised their interests. Small drafting uncertainties can therefore become significant when a valuable payment is eventually triggered.
Unclear valuation assumptions – If overage depends on an increase in land value, the agreement should make clear how that value is calculated, the valuation date, assumptions to be made and whether matters such as planning obligations or abnormal development costs are taken into account.
Vague or overly broad triggers – The agreement needs to be precise about what actually triggers payment. Is it obtaining planning permission, implementing it, selling with the benefit of permission or completing a development? Poorly defined triggers can result in payment becoming due unexpectedly or disputes about whether it is due at all.
Uncertainty around deductible costs – Where overage is calculated on development profit or increased value, disputes can arise over which planning, construction, infrastructure, professional and other costs can be deducted before the payment is calculated.
Unworkable successor provisions – Overage often needs to bind future owners, but restrictions, covenants and obligations must be structured so they remain enforceable without making future transactions unnecessarily difficult.
Restrictions affecting funding or disposals – A Land Registry restriction or consent requirement intended to protect overage can create problems when the owner wants to sell, refinance or grant a lease. Lenders and buyers may require amendments, consent or evidence that the overage provisions have been complied with.
Changes to the development – A scheme may change substantially after the agreement is signed. Phased development, revised planning applications, additional units or a different use can create uncertainty if the agreement only contemplated the original proposal.
No clear information or accounting obligations – The party entitled to overage may need information about planning applications, sales, development costs or valuations to check whether a payment has become due and whether it has been calculated correctly.
No effective dispute procedure – Disagreement may arise over valuation, costs, whether a trigger has occurred or the amount payable. The agreement should provide a practical mechanism for resolving appropriate issues through an independent surveyor or expert rather than requiring every disagreement to become expensive litigation.
Good overage drafting needs to anticipate what could happen years after the original transaction, not simply document what the parties expect to happen today. We can advise on the trigger, calculation and security provisions, test how they would operate under different future scenarios and identify provisions which could create problems with development, funding or a later sale.
Contact Us
If you are negotiating an overage agreement, or considering buying or selling land where future uplift might arise, our specialist property lawyers can help you structure a clear, enforceable and commercially aligned arrangement.
Contact us to discuss your project or request tailored advice.
