Ransom strips and the share of uplift

A ransom strip is a piece of land, often a metre wide and frequently forgotten, that sits between a development site and the public highway or a service connection. Whoever owns it can prevent the scheme being built, and the price of releasing it is conventionally expressed as a share of the increase in land value that release unlocks. The starting point most valuers use is one third, derived from the Lands Tribunal decision in Stokes v Cambridge Corporation in 1961.

Planning permission does not solve this. A permission authorises development; it does not grant anyone the right to cross land they do not own.

What a ransom strip is, and what it is not

The classic form is a deliberate retention. A landowner selling a field keeps a thin strip along the road frontage, or an estate developer retains the verge between the adopted carriageway and the plot boundaries. Decades later, the strip is the only thing standing between a site and its access.

The accidental form is commoner and harder to spot. Unregistered slivers left over from an old conveyance, a former railway boundary, a length of grass verge that was never adopted, a service strip retained by a utility. None of them were created as a ransom, and all of them function as one.

What is not a ransom strip is land over which you already have a right. An existing right of way of adequate width, an easement for services, or a frontage onto an adopted highway gives you what you need. The question is always the extent of the right, not the existence of one, and the answer is in the deeds rather than in what has happened on the ground for twenty years.

Where the conventional share comes from

Stokes v Cambridge concerned land whose development depended on access over a strip owned by another party. The Tribunal approached the value of the strip as a share of the development value released, and settled on a proportion of roughly one third. That figure has been used as a starting point ever since.

Treat it as a convention rather than a rule. It is a valuation approach applied to the facts, and the facts move it in both directions. Where the site has no alternative access at any price, the owner's position is close to absolute and shares well above a third are negotiated. Where an alternative access exists but is inconvenient or expensive, the share falls towards the cost of that alternative, because no rational buyer pays more for the strip than the cost of going round it.

Other factors that move the number: whether the strip owner has their own development ambitions, whether the strip serves several potential sites, the certainty of the planning position, and how much time the buyer has.

Identifying one at title stage

This is due diligence, not negotiation, and it happens before an offer.

1. Obtain official copies and title plans for the site and for every parcel between the site and the public highway, and overlay them on the proposed access arrangement.
2. Ask the highway authority for the extent of adopted highway. Adoption records and any section 31(6) deposits are the authoritative answer to where the public right ends, and the kerb line is not.
3. Look for gaps. A title plan boundary that stops short of the carriageway edge by a metre is the classic signature.
4. Check for unregistered land. Absence from the register is not absence of ownership, and the Land Registry's adverse possession route is slow and contested.
5. Read the restrictive covenants on the site title. A covenant preventing building, or requiring a former owner's consent, can operate exactly like a ransom strip without being one.
6. Repeat the exercise for every service route: water, foul, power and telecoms connections all need a legal route to the site.

Do this before you buy an option, and well before you spend money on a planning application. An application can be submitted over land you do not own, provided the right ownership certificate is served under the Development Management Procedure Order 2015 and notice is given to the owner. That notice is often how a dormant strip owner discovers what their metre of grass is worth.

Alternatives to paying

The strongest negotiating position is a credible alternative, so establish whether one exists before you open the conversation.

A second access from another frontage may be achievable, even if it is worse. Works to the public highway under sections 278 and 38 of the Highways Act 1980 can create a new junction where the frontage is adopted. A prescriptive right may have arisen through twenty years of uninterrupted use, though proving it is expensive and the evidence is usually thinner than the client remembers.

Compulsory purchase is the route people forget. A local authority can acquire land under section 226 of the Town and Country Planning Act 1990 where doing so will facilitate development that improves the economic, social or environmental wellbeing of its area, and it is common for the developer to indemnify the authority's costs. Councils are cautious about using the power for what looks like a private dispute, but the mere existence of a live conversation with the council changes the negotiation.

Negotiating a release

Most releases are documented as one of three things: an outright sale of the strip, a deed of easement granting the rights needed, or an option or promotion agreement under which the strip owner shares in the proceeds.

Overage is usually the right structure. Paying a fixed sum before planning permission means the developer carries the planning risk alone, while a share of realised value aligns both parties and avoids arguing about a valuation of something that may never be consented. Define the trigger carefully: implementation, first disposal, or a stated date, with a longstop.

Two drafting points earn their fee. Say precisely what rights are granted, including construction access, services in perpetuity, and rights for future adoption by the highway authority. And deal with what happens if the scheme changes, because a right granted for 40 dwellings will be argued about when the reserved matters come forward for 58.

Where planning conditions interact

A council can grant permission over land the applicant does not control. Where implementation depends on third party land, authorities use a Grampian condition preventing development until the off-site works are carried out.

The limit on that is a practical one. A condition is only reasonable where there is a realistic prospect of the works being delivered within the life of the permission, and a hostile strip owner who has said no in writing undermines that prospect. Officers sometimes grant anyway and let the applicant carry the risk, which is fine for the council and expensive for the developer.

Ransom value also belongs in the viability conversation. Where a scheme's affordable housing or section 106 contributions are being tested, a genuine, evidenced ransom payment is a land cost like any other, and it has to be presented in a Viability Assessment with the agreement behind it rather than asserted. Expect the council's reviewer to ask whether the payment is at arm's length.

Due diligence before offering

Price the strip before you price the land. Work out the site value with access and without it, take a view on the share, and treat that figure as a deduction from what you can pay the landowner rather than as a contingency.

Then check the plan-making position, because it affects both numbers. A site inside a settlement boundary or carrying an allocation has a stronger value case than one outside, as our notes on settlement boundaries in local plans and on the duty to cooperate explain.

And keep the strip owner out of the loop until you have your own analysis. The best ransom negotiations are the ones where the buyer knows exactly what the alternative costs.

Browse all 66 report types to see which documents an access-constrained site usually needs. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.

This is general guidance, not legal advice. Ransom strips are a property law matter as much as a planning one, and you should take advice from a solicitor and a valuer before relying on any of it.