Reserved matters submitted in phases on a large site
Access, appearance, landscaping, layout and scale can be approved phase by phase. The section 92 clock, parameter plans and fee per application decide how far you can split them.
Submitting reserved matters in phases is normal practice on any site large enough to be built out over more than a season, and the constraint that catches developers is not the phasing itself but the clock in section 92 of the Town and Country Planning Act 1990. Every reserved matters application has to be made within the period the outline permission allows, usually three years from the grant, however many phases you split the submissions into. Miss that and the outline is worthless regardless of how much of the site has been approved.
What reserved matters are, and what they are not
The Development Management Procedure Order 2015 defines five reserved matters: access, appearance, landscaping, layout and scale. An outline permission establishes the principle of development and reserves some or all of these for later approval.
Two distinctions do a lot of work on a phased site.
An approval of reserved matters is not a new planning permission. It is the second half of one permission, which is why it does not extend the time for implementation and why the outline's conditions continue to govern everything.
Reserved matters are also separate from conditions. A condition requiring a surface water drainage scheme is discharged under the conditions procedure, not through a reserved matters submission, and the two attract different fees and different treatment. Mixing them in a single application produces a muddle the officer will have to untangle before anything is determined.
Phasing conditions on the outline
Read the outline permission before designing the phasing. Three condition types decide what is possible.
A phasing condition, requiring a phasing plan to be submitted and approved, sometimes before any reserved matters application. Where one exists, the approved phasing plan becomes the framework, and departing from it needs a variation.
Parameter conditions, tying development to approved parameter plans for building heights, land use areas, access points and green infrastructure. These bind every phase.
Infrastructure trigger conditions, requiring a spine road, an access junction, a drainage attenuation feature or a play area to be delivered before a stated number of dwellings is occupied. These are the conditions that determine which phase has to carry which cost, and they are worth negotiating hard during determination.
Where the outline has no phasing condition and no wording restricting the number of submissions, phased reserved matters applications are generally acceptable. Confirm the position with the case officer in writing before you commit a programme to it.
Fees for each submission
Fees are charged per application. Four reserved matters submissions cost more in total than one covering the whole site, and the national fee schedule is indexed annually, so the figure in last year's appraisal is out of date. Check the current schedule before you fix a budget.
That cost has to be weighed against the benefit. Phasing lets you design phase three with the benefit of what you learned selling phase one, keeps design fees closer to the point of build, and avoids paying for detailed design of land you may never develop. On most schemes that outweighs the extra fees comfortably. On a small site with two phases it may not.
The Planning Statement for each submission should state which phase it covers, which parameter plan it accords with, and which conditions it is not seeking to discharge, so nobody has to guess.
Consistency with the outline parameters
Every phase is measured against the outline. The practical checks before submission:
- Does the phase sit within the development zones on the approved parameter plan?
- Are heights within the approved maxima, measured in the same datum the parameter plan used?
- Does the unit count across all phases stay within the total the outline description permits?
- Does the access arrangement match the approved access, including any land dedicated for highway works?
- Do the affordable housing numbers and tenures for the phase deliver the proportion the section 106 agreement requires at that stage?
Point three is the one that bites late. A description permitting "up to 250 dwellings" is a ceiling, and a phase that would push the running total over it cannot be approved as a reserved matter. If the market has moved and you want more units, that is a section 73 application or a new outline, not a reserved matters submission.
Where a phase differs from what was consulted on at outline stage in a way that affects third parties, the authority may need to consult again, and the tests are the same as those set out in our note on re-consultation after amended plans.
Time limits, and how they run
The default position under section 92 is that reserved matters applications must be made within three years of the outline grant, and development must begin within two years of the final approval of the last reserved matter to be approved. Those defaults can be altered by condition, and on large sites they often are, sometimes to five years or longer.
Read the actual condition on your permission. Then diarise three dates:
- The last day on which a reserved matters application may be made. This is the one that kills outline permissions.
- The date on which the permission will expire if development has not begun.
- The trigger dates for any pre-commencement conditions that have to be discharged before work can lawfully start.
A phased site needs a single register holding every submission, every approval reference and every date, checked monthly. Approvals also appear on the authority's own public record, and what has to be held there is set out in our note on the statutory planning register.
One practical point that saves permissions: making a reserved matters application in time preserves the outline even if the approval comes much later. Where the deadline is close and a phase is not designed, an application for the reserved matters on a single small parcel, made in time, is better than nothing.
Where a phase needs a section 73 first
| Situation | Route |
|---|---|
| Phase exceeds an approved parameter plan height or zone | Section 73 to vary the parameter condition, then reserved matters |
| Total unit count would exceed the outline description | New outline or full application, because section 73 cannot change the description |
| Phasing plan needs reordering | Section 73 to vary the phasing condition |
| Infrastructure trigger arrives too early for cash flow | Section 73 to vary the trigger, with a highways or drainage case behind it |
| Section 106 obligation no longer deliverable as drafted | Deed of variation alongside the reserved matters submission |
Sequence matters. Submit the section 73 first, or at worst in parallel with a clear note explaining the dependency. A reserved matters submission that presupposes an unvaried condition will be refused, and a refusal on a phase is a programme event you have to explain to a funder.
Sites that straddle an administrative boundary need the same sequence run twice, with the added problem that the two authorities may not vary a condition on the same terms. Our note on cross-boundary sites and applications to two councils covers the coordination.
Programming submissions against build phasing
Work backwards from the date you need to start on site for each phase, and allow for:
- Eight weeks determination for a minor reserved matters submission and thirteen for a major, plus the extension of time most authorities now ask for on anything substantial.
- Consultee response periods, particularly the highway authority and the lead local flood authority.
- Seasonal survey windows where a phase needs updated ecology work. Bat emergence surveys run from May to September, and a phase that needs one cannot be submitted usefully in November.
- Discharge of conditions applications in parallel, since those have their own eight week period and their own fees.
A realistic rule for a large site: reserved matters for a phase should be submitted about a year before you need to be on the ground, and the pre-commencement conditions for that phase should be in the same programme line rather than treated as an afterthought.
If you are scoping the documents each phase will need, browse the 66 PlanScope report types and draft the narrative submissions while the technical work runs.
This is general guidance, not legal advice, so 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.
Frequently asked questions
Can reserved matters be approved in more than one application?
Yes. Phased submissions are normal on large sites, provided every application is made within the period the outline permission allows and the outline contains no condition restricting the number of submissions. Confirm the position with the case officer in writing before committing a build programme to a phased approach.
What are the five reserved matters?
Access, appearance, landscaping, layout and scale, as defined in the Development Management Procedure Order 2015. An outline permission establishes the principle of development and reserves some or all of these for later approval. Reserved matters are separate from conditions, which are discharged under a different procedure with a different fee.
Does a reserved matters approval extend the permission?
No. An approval of reserved matters is the second part of the same permission rather than a new one. Under the default position in section 92 of the Town and Country Planning Act 1990, development must begin within two years of the final approval of the last reserved matter, unless the permission sets a different period by condition.
Can a phase exceed the outline unit numbers?
No. A description permitting up to a stated number of dwellings is a ceiling, and a phase that would push the running total above it cannot be approved as a reserved matter. Increasing the number needs a new outline or full application, because section 73 cannot change the description of development.
How much lead time does a phase need?
On a large site, submit reserved matters roughly a year before you need to be on the ground. Allow eight weeks for a minor and thirteen for a major determination, plus an extension of time, consultee responses, seasonal ecology survey windows and a parallel eight week period for the discharge of pre-commencement conditions.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.