Plan making reform and what happens to emerging plans

The Levelling-up and Regeneration Act 2023 rebuilds plan making around a single local plan per authority, a statutory timetable, gateway checks during preparation and a set of National Development Management Policies that take precedence over conflicting plan policies. Most of that architecture needs regulations and a revised national framework to operate, and the transitional arrangements decide which system your plan finishes under.

For anyone promoting a site, the practical question is narrower: how much weight does an emerging plan carry today, and does the reform change the answer. Mostly it does not. Section 38(6) of the Planning and Compulsory Purchase Act 2004 still requires determination in accordance with the development plan unless material considerations indicate otherwise, and the weight given to an emerging plan is still a judgement on three familiar factors.

What the 2023 Act changes

The National Development Management Policies provision is the one with the longest reach. It removes the need for every plan to restate national policy, and it means a plan policy conflicting with a national management policy loses. Plans in preparation that repeat national policy at length will need stripping back.

The shorter timetable and what it demands

The intention behind the statutory timetable is that a plan should move from commencement of preparation to adoption within a fixed period, considerably shorter than the time plans have actually taken. Authorities publish a timetable and are expected to keep to it.

That is a resourcing question more than a legal one. A shorter period front-loads the evidence base: the housing and economic needs assessment, the strategic flood risk assessment, the habitats regulations assessment, the transport modelling and the site assessment work all have to exist before the first consultation rather than being assembled around it.

For a site promoter, the consequence is that the call for sites window matters more than it used to. A site that misses the assessment round in a compressed programme will not be picked up later.

Gateway assessments

The Act provides for independent checks at defined points during plan preparation rather than only at examination. The purpose is to catch a plan that is heading for failure while there is still time to fix it, instead of discovering the problem after four years of work.

Two things follow for representations. Evidence that would previously have surfaced at examination is better deployed earlier, because a gateway is a chance to have a defect recognised before positions harden. And the plan's own programme becomes a material fact you can hold the authority to, since a published timetable that has been missed is evidence about the likelihood of adoption.

Plans already in preparation

Transitional arrangements determine whether a plan finishes under the old system or is remade under the new one. The pattern used in previous reforms has been a cut-off date for submission for examination, with plans submitted before it examined under the existing regime and required to be adopted within a stated period after that.

As at September 2026, verify the current commencement and transitional position before advising on any specific plan, because the dates have moved and individual provisions of the Act have been brought into force in stages. The planning law timeline is the place to follow it, and the current national framework, re-issued on 17 August 2026 with policy-coded chapters in place of paragraph numbers, sets out how transitional arrangements apply to plans at each stage.

Practically, a plan close to adoption will almost always be better finished than restarted, and authorities behave accordingly. A plan at an early stage in a compressed programme is the one most likely to be reset.

Weighing an emerging plan in the meantime

The test has not changed. Weight depends on the stage the plan has reached, the extent of unresolved objections to the relevant policies, and the degree of consistency between those policies and national policy.

Apply it policy by policy rather than to the plan as a whole. A settlement boundary attracting forty objections carries less weight than a design policy nobody has contested, even though both sit in the same document at the same stage.

Then work through the surrounding questions, because they usually matter more than the emerging plan itself:

• Is the adopted plan out of date, and which policies specifically?
• Does the authority have a deliverable housing land supply, measured against the correct requirement?
• What did the most recent Housing Delivery Test result show?
• Are there written ministerial statements bearing on the issue, and what weight do those carry?
• Has an inspector at a recent appeal in the same authority already expressed a view on the emerging policies?

That last one is the most useful and the most overlooked. Appeal decisions are not binding precedent and should not be presented as though they were, though they are a reliable indication of how inspectors have been approaching the weight question in that authority.

What this means for a site promotion

1. Get the site into the call for sites and the housing and economic land availability assessment, with the evidence the authority's methodology asks for rather than a general brochure.
2. Engage at the early consultation stage, where the spatial strategy is still open, rather than waiting for the publication version when the options have closed.
3. Make publication stage representations that are precise about soundness, naming the test the policy fails and offering the wording that would fix it.
4. Register to appear at examination, and keep the right open even if you expect to withdraw.
5. Track the published timetable and record every slippage, because delay is evidence in a parallel application.
6. Run that parallel application where the programme is slow, supported by a Planning Statement that deals squarely with the emerging plan and the weight it should carry.

Illustrative example. An authority publishes a plan allocating a 200 home site, receives objections to the allocation from the highway authority, and then misses two milestones in its published timetable. A parallel application on the same site argues limited weight for the allocation because of unresolved objections, and limited weight against it for the same reason, while relying on the absence of a five year supply. The scenario is illustrative.

None of this removes the basic discipline. Plan making reform changes the machinery and the timetable. What decides an application in the meantime is the adopted plan, the material considerations and the evidence you put in front of the decision maker.

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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