Grampian condition: securing works on land you do not control

A Grampian condition is a negatively worded planning condition that prevents development, or a stage of it, from proceeding until something happens on land the applicant does not control. It is how a council grants permission for a housing scheme that needs a new junction on the public highway, or a connection to a sewer in a neighbouring field, without waiting for the applicant to acquire rights it may never get. The name comes from Grampian Regional Council v City of Aberdeen District Council (1984), where the House of Lords accepted the device.

Used well it unlocks schemes. Used badly it produces a permission nobody can implement, which is worse than a refusal because it wastes a year first.

Where the name comes from

In the Grampian case the road improvement needed to make the development acceptable was on land in the roads authority's ownership, and the applicant could not compel the works. The House of Lords held that a condition prohibiting development until the improvement had been carried out was lawful, because it did not require the applicant to do anything it had no power to do. It simply withheld the benefit of the permission until the state of affairs existed.

That is the structural point. A positively worded condition requiring the applicant to build something on third party land would be unenforceable and therefore unlawful. A negatively worded condition requiring that nothing happens until the works exist is enforceable against the applicant, because the applicant controls whether it starts.

The ordinary tests still apply. A condition must serve a planning purpose, fairly and reasonably relate to the development permitted, and not be so unreasonable that no reasonable authority could impose it, following Newbury District Council v Secretary of State for the Environment (1981). National guidance adds that conditions must be necessary, relevant to planning, relevant to the development, enforceable, precise and reasonable in all other respects.

The reasonable prospects test

For a period the courts required a reasonable prospect that the action would be performed within the life of the permission. That was relaxed in British Railways Board v Secretary of State for the Environment (1993), which held that a negatively worded condition should not be imposed only where there are no prospects at all of the action being performed within the time limit.

"No prospects at all" is a low bar, and it is deliberately low. The reasoning is that a developer who cannot deliver the off-site works simply does not build, and no harm results. So the burden on an applicant is to show that delivery is not impossible rather than to prove it is likely.

That said, weight is a different question. Where the prospects are poor, an authority can properly give the permission less weight when considering, for example, a five year housing land supply calculation, and an objector can properly point to the difficulty. Do not confuse lawfulness with deliverability.

Typical uses on highway and drainage works

The recurring cases are predictable, and the highway ones dominate.

• a new access, junction improvement or footway to be delivered under a section 278 agreement with the highway authority
• visibility splays that require the removal of a hedge or a wall in third party ownership
• off-site drainage, an outfall across neighbouring land, or a connection to a public sewer
• upgrading a bridleway or providing a controlled crossing
• off-site biodiversity net gain units where the receptor site is in separate ownership
• utility diversions

The drafting is almost always the same shape. No development shall begin until the works shown on drawing X have been completed in accordance with a specification approved in writing by the local planning authority. Or, where occupation rather than commencement is the right trigger, no dwelling shall be occupied until those works are complete. Where highway capacity is the underlying issue, the case for the trigger point usually comes out of the Transport Assessment.

Why it is preferred to refusing permission

National policy asks authorities to approve applications where possible and to use conditions rather than refusal where a condition can make the development acceptable. A Grampian condition is the standard tool for that.

It also serves the applicant. A permission subject to a condition requiring off-site works is a real asset: it can be used to negotiate with the landowner whose consent is needed, to support a funding application, and to fix the planning position while the land assembly runs in parallel.

The alternative, waiting until every third party right is secured before applying, ties up money for longer and exposes the scheme to policy change. And most landowners negotiate more seriously once a permission exists.

Where a section 106 is needed instead

A condition cannot require the payment of money. It cannot require the applicant to enter into an agreement. It cannot bind land outside the application site, and it cannot secure an ongoing obligation such as a management regime on someone else's land.

Those all belong in a planning obligation under section 106 of the Town and Country Planning Act 1990, or in a highways agreement under section 278 or section 38 of the Highways Act 1980. The usual arrangement pairs them: a Grampian condition prevents development until the highway works are complete, and a section 278 agreement between the developer and the highway authority is the mechanism by which they get built.

Pre-commencement conditions have an extra procedural step. Section 100ZA of the 1990 Act requires the authority to obtain the applicant's written agreement before imposing a condition that must be discharged before development begins. In practice authorities send a schedule of proposed pre-commencement conditions for agreement before issuing the decision, and an applicant who ignores that email loses the chance to influence the wording. The discharge process has its own timing rules, covered in our note on deemed discharge of planning conditions under section 74A.

Drafting one that can be discharged

Most problems with these conditions are drafting problems, and they surface two years later when a purchaser's solicitor reads the permission.

Name the works precisely, by reference to a drawing number and revision, or to a specification that exists. A condition referring to "highway improvements to be agreed" gives the discharging officer nothing to approve.

Choose the trigger with care. Commencement is the strongest trigger and the most obstructive: it stops site clearance, remediation and enabling works as well as building. Where the mischief is traffic generation rather than construction traffic, first occupation is the right trigger and it lets the developer build while the off-site works proceed.

Say who approves what, and in what form. Include a mechanism for the situation where the third party refuses: an alternative scheme to be submitted for approval, or a reversion to a reduced quantum of development. And check that the condition is capable of being discharged by evidence you can actually obtain, such as a certificate of practical completion from the highway authority rather than an open-ended satisfaction test.

Where a condition turns out to be unworkable, the routes are a section 73 application to vary it or, for trivial wording changes, a section 96A non-material amendment, and our note on section 96A non-material amendments and their limits explains which one fits.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.

If you are preparing the supporting evidence for a scheme with off-site works, browse the report types on PlanScope. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.