The deadline for submitting reserved matters

An outline permission in England normally carries a condition requiring the application for approval of reserved matters to be made within three years of the date of the grant. That reserved matters deadline bites on the date the application is made, not the date the council approves it. Development must then begin within two years of the final approval of the last reserved matter. Both periods come from section 92 of the Town and Country Planning Act 1990, and both can be changed by the condition itself, so read the decision notice before assuming the statutory default applies to your site.

The two statutory periods

Section 92 does two things. It requires the outline permission to carry a condition fixing a period within which an application for approval of reserved matters must be made, and it requires a second condition fixing a period within which development must begin after the last reserved matter is approved. The default periods are three years and two years respectively.

The wording matters because the triggers are different. The first clock runs from the date of the outline permission. The second runs from the final approval of the last reserved matter to be approved, which on a scheme where access was approved in January and landscaping in November is the November date.

Older permissions behave differently. Before the Planning and Compulsory Purchase Act 2004 changed the defaults, outline permissions commonly carried a five-year period for reserved matters. If you have inherited a site with a permission from the 1990s or early 2000s, the condition on that notice governs, not the current default.

Conditions that move the dates

Section 92 allows the local planning authority to substitute a different period, longer or shorter, where it thinks fit. In practice authorities use that power in both directions.

On a strategic allocation of several hundred homes, a three-year window for every reserved matter is unworkable, and authorities routinely grant longer periods, sometimes with different dates for the first phase and for later ones. On a site where the authority wants early delivery, or where the evidence base will go stale, you may see a two-year period instead. Occasionally a condition fixes a calendar date rather than a period, which removes any argument about when the clock started.

Read the condition as drafted. A condition requiring reserved matters "within three years of the date of this permission" is different from one requiring them "within three years of the approval of phase one", and the difference can be two or three years of land holding cost.

Phased submissions on a large site

Nothing in section 92 limits you to a single reserved matters application. Where the outline anticipates development in phases, you can submit reserved matters phase by phase, provided every application is made within the period the condition allows.

That proviso is where schemes come unstuck. If the outline carries a plain three-year condition and no phasing provision, the third and fourth phases of a 600-home site will need their reserved matters submitted inside the same three years as the first, which defeats the point of phasing. The fix is to deal with it at outline stage: ask for an extended period for later phases, or for an express phasing condition, and justify it with a delivery programme in the planning statement that accompanies the outline application.

Authorities are usually receptive to that argument when the scheme is allocated and the trajectory is in their housing land supply. They are less receptive when the request looks like land banking.

What has to be in the application for it to count

An application for approval of reserved matters is not an application for a new permission. It is an application for approval of the details that the outline permission reserved, and it must cover every matter the condition reserved for the phase in question. Submit an application that addresses layout and scale but ignores appearance, and you have not discharged the condition for appearance.

The practical risk is validation. The deadline is met by making a valid application, so an application posted in time but rejected as invalid for a missing fee, an unsigned certificate or an illegible plan may leave you outside the period with no permission left to implement. The components that most often cause rejection are the ownership and agricultural holdings certificates, which have their own traps and are worth checking against the guidance on ownership certificates A to D, and the fee, which is set by the national fee regulations and indexed annually. Check the current schedule before you calculate it, and check whether any of the fee exemptions and reductions apply.

Build in margin. Eight to twelve weeks before the expiry date is a sensible target for submission on anything other than a single-plot scheme, because it leaves room to re-submit if the council rejects the first attempt at the validation stage.

Refusal, appeal and resubmission

Because the deadline attaches to making the application, a refusal does not by itself kill the outline permission. If the council refuses reserved matters with eighteen months still on the clock, you can revise the scheme and apply again, as many times as the period allows.

If the period is nearly up, your options narrow to an appeal against the refusal or an appeal against non-determination. Both keep the matter alive, but they take months, and an appeal against non-determination carries the risk of losing control of the scheme to an inspector. The trade-offs are set out in more detail in the discussion of appealing non-determination or waiting.

One point that catches people out. An appeal decision approving reserved matters counts as the final approval for the purposes of the second clock, so the two-year commencement period runs from the date of the inspector's decision.

Where the deadline has already passed

The outline permission has lapsed and cannot be implemented. There is no general mechanism for reviving it. Section 73 of the 1990 Act allows conditions to be varied, but the Act does not permit it to be used to change the time limit conditions imposed under sections 91 and 92, and the temporary extension-of-time schemes that operated after 2009 and again in 2020 were both time limited and are long closed. Section 73B, inserted by the Levelling-up and Regeneration Act 2023, creates a further route for varying a permission, and its commencement and scope should be checked against current government guidance before anyone relies on it.

What is left is a fresh application. The lapsed permission is still useful as evidence that the principle of development was found acceptable, and an officer will often say so in a report, but it is not a fall-back permission and it does not bind the authority. Policy will have moved on. A scheme consented in 2021 will now face mandatory biodiversity net gain, the current Building Regulations energy standards and whatever the adopted local plan says today.

An illustrative worked sequence

Take an outline permission for 45 dwellings granted on 14 March 2024 with the standard section 92 conditions. Reserved matters must be applied for by 14 March 2027. The applicant submits on 2 February 2027, the council approves layout, scale, appearance and landscaping on 9 August 2027, and development must then begin by 9 August 2029. If the council had refused on 1 March 2027, there would have been thirteen days left to make a second application. This example is illustrative and the dates on any real permission come from its own decision notice.

Programming backwards from the date

Once you know the expiry date, work backwards. Reserved matters applications for anything beyond a handful of plots usually need a drainage design, an arboricultural assessment, an ecology update and a materials schedule, and some of that evidence can only be gathered in season. Bat emergence surveys run from May to September. Botanical survey work needs the growing season. Lose a summer and you lose a year.

Add the determination period, which is eight weeks for a minor reserved matters application and thirteen for a major, plus the time to answer consultee comments. Then add the validation margin. On most sites that puts the start of serious work about twelve to eighteen months before the expiry date, which is earlier than most landowners expect.

If you are assembling the evidence base for a reserved matters submission and want to see which supporting documents a scheme of your size and constraints is likely to need, enter your postcode on PlanScope and work through the guided questions on the home page.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.