Sequencing tree conditions on a development site

Arboricultural conditions on a residential consent follow a fixed order, and most of the work happens before anything is built. The tree condition discharge sequence starts with an approved method statement and tree protection plan, moves to fencing erected and inspected on site, and only then releases the ground for groundworks. Get that order wrong and the consequence is not a delayed discharge, it is a development that may not have been lawfully begun.

Site managers reasonably ask why a fence needs a formal approval. The answer is that the fence is the condition. Everything else in the arboricultural package depends on it staying where it was put.

Typical tree conditions on a residential consent

A permission affecting retained trees normally carries three or four of the following.

1. No development until an arboricultural method statement and tree protection plan have been submitted to and approved in writing by the local planning authority.
2. No development until protective fencing has been erected in accordance with the approved plan and inspected on site.
3. Development to be carried out in accordance with the approved method statement, with no storage, mixing, level change or excavation inside the root protection areas.
4. Details of replacement planting, its specification and its aftercare, before occupation or within the first planting season.
5. A landscape and tree management plan covering a defined period after completion.

Conditions one to three block a start. Conditions four and five do not. Sorting them into those two groups on the day the decision notice arrives takes ten minutes and saves a month.

Which ones bite before any work starts

A pre-commencement condition prevents the development from starting until it is discharged. That includes demolition, site clearance, setting up a compound and forming a haul route, all of which are material operations.

Site clearance is the one that catches people out most often, because it feels like preparation rather than development. It is not, and our note on clearing a site before applying covers the risks of doing it early.

Where a condition is worded so broadly that it blocks work unrelated to trees, it can be worth applying under section 73 to reword it, or asking the council to agree a partial discharge for a defined area. Both take time, so raise it as soon as the decision issues rather than the week before the contractor mobilises.

Fencing inspections and written confirmation

The specification comes from BS 5837:2012, which sets out the default protective barrier and the circumstances in which ground protection is needed instead of, or as well as, fencing.

The sequence on site runs like this. The arboriculturist or engineer sets out the root protection areas from the approved plan. The fencing goes up on that line, with the correct uprights, bracing and signage. The project arboriculturist inspects and photographs it. The photographs and a signed confirmation go to the council, either as a discharge application or under the monitoring arrangement the condition sets out.

Keep the photographs geotagged or at least identifiable by reference to fixed features. A photograph of a fence against a blank background proves nothing three months later.

And do not move the fence. If a section has to come down for a defined operation, the method statement should say so, with the supervision and the reinstatement recorded.

Phased sites and protection by parcel

On a site delivered over several years, a single site-wide fencing condition is a problem. It requires every root protection area on a 40 hectare site to be fenced before the first house on parcel one is started, and it then requires that fencing to survive years of traffic.

Ask for phased wording at application stage. A condition that requires protection to be in place for each phase before development of that phase begins is entirely normal and most authorities will accept it if it is proposed with a phasing plan.

Where the permission is already granted with site-wide wording, a section 73 application to vary the condition is the formal route. Some authorities will instead agree a written approach in correspondence, which is quicker and less certain. Take the formal route where the site is being sold on, because the next owner inherits the wording and not the correspondence.

Utility runs and the conflict with protection zones

Services are designed after the layout, by a different team, to different constraints. Drainage falls to a fixed outfall level, and the shortest route from a plot to the main is frequently straight through a root protection area.

Resolve it at method statement stage. The options are a route outside the protection area, an above-ground or shallow route, a trenchless crossing, or hand excavation under supervision with roots over a defined diameter retained. Each needs to be drawn rather than described.

Drainage is the hardest because of the levels. A foul run at 1.2 metres depth under a mature oak is not made acceptable by a note asking the operative to be careful.

Bring the drainage engineer and the arboriculturist into the same conversation before the layout is fixed. Retained trees also affect the buildings around them, which our note on retained trees and daylight to habitable rooms covers, and that conversation belongs at the same stage.

Records that satisfy the monitoring officer

Monitoring officers look for a continuous record rather than a set of assertions. A site file with dated inspection sheets, photographs at each visit, records of any incursion and what was done about it, and copies of the correspondence with the council is what satisfies them.

The Construction Management Plan should cross-refer to the arboricultural method statement so the site team is working from one set of rules on compound location, wheel washing, material storage and vehicle routes. Where these two documents disagree, the fence usually loses.

Longer term commitments belong in a separate document, and our note on long term tree management covers how those are secured.

Consequences of building before discharge

Three separate things can follow. The council can serve a breach of condition notice, against which there is no appeal. Damage to a tree protected by an order or in a conservation area can be a criminal offence in its own right. And where a genuine pre-commencement condition was not discharged, the development may not have been lawfully begun, which matters if the permission has since expired.

That third point is the one that costs real money. It is also the one nobody thinks about until a purchaser's solicitor raises it.

Commission the tree survey early enough for the layout to respond to the root protection areas rather than the other way round. Most of these conditions exist because a layout was drawn first and the trees were considered afterwards.

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

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