Reports for a scheme with a crane oversailing a neighbour

A tower crane whose jib swings across a neighbour's airspace is a trespass question before it is a planning question. Planning permission is rarely needed for the crane itself, because plant required temporarily for construction is covered by Schedule 2 Part 4 Class A of the Town and Country Planning (General Permitted Development) (England) Order 2015. What the local planning authority controls is the effect: hours, routing, dust, noise, tree protection and the method statement that has to be approved before work starts. The oversail itself is controlled by the neighbouring landowner, and no planning consent can give you that right.

For a constrained urban site, that split matters to the programme. Two workstreams run in parallel: the crane oversail licence negotiated with each affected owner, and the construction logistics evidence submitted with the planning application or discharged under condition.

Whether the crane needs planning permission

Erecting a tower crane is an operation, and operations are development under section 55 of the Town and Country Planning Act 1990. Part 4 Class A of the GPDO grants permission for buildings, moveable structures, works, plant and machinery needed temporarily in connection with operations being carried out on the land, for the duration of those operations. A crane serving a permitted building site normally falls inside that. Remove the right, and the position changes: Article 4 directions, and conditions on the parent permission that restrict plant or require prior approval of a method statement, both bite.

Two situations do need thought. Where the crane stands on land outside the application site, for example on a temporary compound on a separate parcel, Part 4 Class A only helps if the operations are on that same land. A separate temporary permission may be needed. And where the crane sits within the curtilage of a listed building or its setting is affected, listed building consent is not engaged by plant, but the visual effect during construction can still attract objection.

Where the control actually sits

Swinging a jib through the airspace above adjoining land is trespass at common law. The point was settled in the late 1980s in the Anchor Brewhouse litigation, where the court granted relief against oversailing by tower cranes: the owner of the surface owns the airspace to the height needed for ordinary use and enjoyment. An injunction is a real prospect, which is why oversail licences get signed.

A licence typically covers the height and arc of the oversail, the period, a fee, insurance and indemnity, a condition that the crane is left free to slew (weathervane) out of hours, and a dilapidations schedule. Expect to pay, and expect the negotiation to take longer than the planning determination. Where ownership is fragmented, a single flat owner in a converted block can hold up a programme.

Aviation safeguarding and lighting

Tall cranes near a licensed aerodrome, a military airfield or a technical site need separate treatment. Aerodrome safeguarding maps are lodged with local planning authorities under the safeguarding direction, and applications inside those zones are consulted on the aerodrome operator and, for military sites, the Defence Infrastructure Organisation. A crane can penetrate an obstacle limitation surface even where the finished building does not.

The Civil Aviation Authority publishes guidance for crane operators on notification and aviation obstruction lighting. Thresholds are set by height above ground level and by proximity to aerodromes, and they change, so check the current CAA guidance rather than relying on a figure in a specification. Practically, the contractor notifies, the aerodrome responds with a maximum permitted height or a lighting requirement, and the crane schedule is adjusted. Build a fortnight of contingency into the programme for that exchange on any scheme above about six storeys near an airport.

Oversailing a railway, a canal or a reservoir brings in asset protection agreements with the relevant undertaker. Those are contractual, not planning, but the local planning authority will often condition a requirement to submit evidence that they are in place.

The construction logistics evidence

Most urban authorities secure this through a pre-commencement condition rather than a validation requirement. The document that discharges it is usually a Construction Management Plan, sometimes supported by a separate Construction Traffic Management Plan where routing and holding arrangements are contentious. London boroughs applying London Plan policy T7 generally ask for a construction logistics plan in the same form.

What a planning officer looks for in the crane section:

• the crane position, base design and maximum jib radius shown on a plan against site boundaries
• the oversail arc, with the adjoining titles it crosses identified
• erection and dismantling dates, the road space needed and the traffic order applied for
• out of hours slewing arrangements and the wind speed at which work stops
• the highway authority licence for any hoarding or scaffold under the Highways Act 1980
• lifting over occupied buildings, with exclusion zones and marshalling

Where a crane base sits inside the root protection area of a retained tree, the arboricultural method statement has to carry the load design. That is a common reason for a discharge submission bouncing, so co-ordinate the tree survey with the logistics drawings rather than after them.

Party wall and access to neighbouring land

The Party Wall etc. Act 1996 gives rights to build up to and on the line of junction, to cut into a party wall and to underpin. It gives no right to oversail airspace with plant. Serving notice under section 3 does not license the crane, and a party wall award cannot authorise it.

The Access to Neighbouring Land Act 1992 is narrower still: the county court can order access only for "basic preservation works" to the applicant's own land, which excludes new build. So there is no statutory route. If the neighbour says no, the design changes, usually to a luffing jib crane that can be restrained within the site boundary, or to mobile cranes with a longer lifting programme and a higher cost.

Conditions on erection and dismantling

Erection and dismantling are the two days of highest risk and highest neighbour irritation. Sensible conditions control them without making the site unbuildable:

1. Prior approval of a construction management plan including crane details, before any works other than demolition and site clearance.
2. Working hours for lifting operations, typically tighter than general site hours.
3. Notification of neighbours a set number of days before erection and dismantling.
4. Submission of the temporary traffic regulation order or road space booking reference before the lift.
5. Noise and vibration control in accordance with BS 5228 Parts 1 and 2.

Resist any condition that requires you to obtain a private oversail licence. The authority cannot enforce a private agreement, and a condition that depends entirely on a third party's consent risks being unreasonable under the tests in the Planning Practice Guidance on the use of planning conditions.

The document set for a constrained urban site

For a scheme of 10 to 100 units on a tight site with oversail, the pack that gets through validation and then through discharge usually looks like this: a Planning Statement, a Design and Access Statement, a Construction Management Plan, a noise and vibration assessment covering the construction phase, a dust assessment following the Institute of Air Quality Management approach, an arboricultural impact assessment with method statement, a structural condition survey of adjoining buildings for the party wall process, and daylight and sunlight evidence for the completed scheme. Sites with a basement add a basement impact assessment. Sites over a former industrial use add contamination reporting.

The crane is not a separate report. It is a paragraph in three of those documents, and it has to say the same thing in each.

If you are scoping that pack, the same logic applies to other awkward urban sites, from a rooftop extension to an occupied block to a small industrial unit next to housing, where the construction phase carries more planning risk than the finished building.

Enter your postcode on PlanScope to see which of the 66 reports a constrained site is likely to need, then send the drafts for professional review.

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; check the position with your local planning authority or a qualified professional before relying on it.