Phased applications and the Gateway One duty

A phased application fire statement is needed at the point you apply for planning permission for development involving a relevant building, which on most phased schemes means the outline application rather than a later phase. Article 9A of the Town and Country Planning (Development Management Procedure) (England) Order 2015 attaches the duty to the application for planning permission, and an outline application is an application for planning permission. Deferring the whole question to reserved matters because the design is not fixed is the mistake that costs a validation cycle.

The duty is narrow in scope and wide in consequence. It bites only on relevant buildings, but where it bites, the Health and Safety Executive comes into the process as a statutory consultee and its comments shape the permission.

When the duty attaches in a phased scheme

Article 9A requires a fire statement to accompany an application for planning permission for development that involves the provision of one or more relevant buildings, or development of an existing relevant building.

A relevant building is one containing two or more dwellings, or educational accommodation, which meets the height condition. The condition is expressed as 18 metres or more in height, or seven or more storeys. Height is measured to the floor surface of the top storey, so a building with a tall ground floor and a rooftop plant enclosure can sit either side of the line depending on how it is measured. Measure it properly and put the measurement on the drawing.

On a phased scheme, ask a single question of each application you intend to submit: does this application, on its own terms, involve the provision of a relevant building? An outline application covering the whole site with a masterplan that includes an 11-storey block does. A later full application for one low-rise phase does not, even though the site as a whole contains a tall building.

The statement must be provided on the form published by the Secretary of State, or one substantially to like effect. Submitting a fire strategy document instead of the form is a recurring validation failure. Submit both if you like, but submit the form.

Outline applications and how much detail is possible

An outline application with only access and scale settled cannot describe an evacuation strategy in the way a detailed design can. That is understood. It does not make the statement optional.

What an outline statement can address, and should:

• Site access for fire appliances, including route widths, turning and carrying capacity, and where the access points sit in the masterplan.
• Water supplies for firefighting and where they will come from.
• The principles of the evacuation strategy for each building type proposed, at the level of principle rather than detail.
• Separation distances between blocks and the constraints those place on plot layouts.
• Any site constraint that limits the options later, such as a single point of vehicular access or a tight boundary to an existing building.

Access and water supply are the two that actually belong at outline, because they are fixed by the layout and are expensive to change once plots are sold. An outline statement that covers those two properly and is honest about what remains undetermined usually reads better to the consultee than one that guesses at the rest.

Say what stage the design has reached and what will be settled later. A statement that overstates certainty at outline creates a problem at Gateway Two, when the detail lands differently.

Reserved matters and where the information actually lands

A reserved matters submission is an application for approval of details reserved by condition, not an application for planning permission. The article 9A duty does not attach to it in the same way, which surprises people who assume the form follows the design.

In practice authorities handle this in one of three ways. Some impose a condition requiring the equivalent fire information with the reserved matters submission. Some consult the Health and Safety Executive informally at reserved matters where fire safety was material at outline. Some treat the outline statement as sufficient and leave the detail to building control at Gateway Two.

Ask which of the three your authority intends before you submit the outline. The answer changes what you write in the outline statement and what you expect to spend at reserved matters. And ask in writing, because a case officer changes during a phased scheme more often than not.

Where a phase is brought forward by a full application rather than reserved matters, the duty applies again on its own terms. A full application for a single 19-storey block within an outline-permitted masterplan is an application for planning permission involving a relevant building, so it needs its own statement.

Conditions that defer fire detail

Deferring detail by condition is normal and sensible. Deferring the wrong thing is not.

Things that defer well: the specification of firefighting shafts, the detailed evacuation lift provision, sprinkler design, the location of dry or wet risers, the detail of smoke control. These are design development items that building control and the Building Safety Regulator will examine at the next gateway anyway.

Things that defer badly: the site access geometry, the position of the fire appliance hardstanding, separation between blocks, and anything that determines whether a chosen evacuation strategy is possible at all. Defer those and you may find at detailed design that the only workable strategy needs a second stair core, which changes the floorplate, the unit mix and the viability.

A condition cannot cure an application that never considered the point. Where the Fire Statement is silent on a matter the consultee considers fundamental, the response is usually a request for further information rather than a suggested condition.

What goes wrong when too much is deferred

The familiar sequence on phased schemes runs like this. Outline permission is granted with a thin fire statement. Detailed design begins two years later against a fire strategy that needs a wider core, a second stair, or an external wall build-up that changes the elevation. The change is more than the permission allows, so it needs a variation or a fresh application, and the variation is determined against a policy framework that has moved.

At that point the fire engineering is no longer a technical exercise. It is a planning risk with a programme cost. A Fire Safety Strategy developed to the point of testing the principal moves, even in outline, is inexpensive insurance against that sequence.

Structural consequences travel with fire strategy decisions, which is why the two disciplines should be in the room together at outline. The relationship set out in disproportionate collapse and building class in design is the clearest example: a change to the structural class changes the frame, and the frame is what the masterplan sold.

Sequencing phases against the regulator

Gateway One sits in the planning system. Gateway Two sits with the Building Safety Regulator before construction of a higher-risk building begins, and Gateway Three at completion. On a phased scheme those gateways repeat per building, on a programme that does not align neatly with planning phases.

Build the sequence into the programme explicitly. Note for each relevant building which application carried its fire statement, when Gateway Two approval is required, and what construction activity is blocked until it is granted. Site logistics come into it as well, since the position of cranes and hoardings affects appliance access during construction. The limits discussed in crane oversail and planning permission matter here for the same reason.

Engage the consultee early. Pre-application discussion on a tall building is worth having even where the authority charges for it, because the alternative is discovering the objection during the statutory consultation period.

Keeping a record of what was assessed and when

Keep one document that lists, for each relevant building: the application reference that carried its fire statement, the version and date of that statement, the drawing numbers it referred to, the consultee response, and any condition that deferred detail.

On a scheme that takes six years and passes between three design teams, that list is the only reliable answer to the question of what was approved on what basis. Without it, someone eventually resubmits information that was already agreed, or misses a condition that was not.

A fire statement for a relevant building must be prepared by someone with the necessary fire engineering competence, and a licensed or competent professional is legally required for this work. An AI-assisted draft is a starting point for that professional rather than a substitute for them. 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.