Full application or outline with reserved matters

An outline or full planning application answers different commercial questions. Outline establishes that the principle of development is acceptable and leaves the detail to a later approval, which suits a landowner testing a site or selling it on. A full application settles everything in one decision and gives you something you can build. The choice is about money and risk rather than about which is easier to submit.

For a self-builder with one plot, the honest answer is usually a full application. For anyone promoting land, the answer is usually outline. The interesting cases sit between.

What an outline permission actually grants

An outline permission grants permission for the development described, subject to the later approval of the matters that were reserved. It is a permission, not an agreement to consider one, and the authority cannot revisit the principle at the reserved matters stage.

Article 5 of the Development Management Procedure Order 2015 governs what an outline application must contain. The description of development has to be clear about quantum, because that is what has been permitted. Where access is not reserved, the application must include details of it.

The authority has a short window after receiving an outline application in which it may direct that it cannot be determined without further detail, effectively requiring a full application. That happens on sensitive sites where the effects cannot be judged without knowing the design.

The five reserved matters

Access, appearance, landscaping, layout and scale. Each is defined in the Order and each fixes something different.

Access covers the accessibility of the site for vehicles and pedestrians and the position of the access points, not the internal road design. Appearance covers the aspects of a building that determine its visual impression, including materials. Landscaping covers the treatment of the land, including planting, walls, levels and boundary treatment. Layout covers the way buildings, routes and open spaces are placed in relation to each other. Scale covers height, width and length of each building.

You may reserve all five, or some. Reserving access is unusual on a site with a contested highway position, because the highway authority's objection is better resolved before the principle is granted. The checklist in outline planning application: what to reserve sets out the choices.

Parameter plans are the practical answer to the tension between reserving detail and giving the council enough to assess. A set of parameters fixing maximum heights, development zones and access points, tied into the permission by condition, lets an officer judge the effects while leaving the design open.

What you can defer and what you cannot

Reserving a matter does not defer the evidence that relates to it. Three areas catch applicants out.

Environmental effects. Screening under the Environmental Impact Assessment Regulations 2017 happens at outline stage, and where an environmental statement is required it has to assess the realistic worst case within the parameters. A parameter plan that is too generous produces a worse assessed effect.

Ecology. Survey seasons do not move for an outline application. A site with buildings likely to support bats needs its surveys before the application, because the authority cannot grant permission where a protected species issue is unresolved. The biodiversity gain condition applies to outline permissions too, with its own mechanics for phased schemes as set out in net gain on outline permissions and phased schemes.

Flood risk, contamination and highway capacity. All three affect whether the principle is acceptable, so all three are assessed at outline. The transport work in particular needs a trip generation and junction assessment based on the quantum applied for.

What outline defers is design resolution: elevations, materials, the internal layout, planting schedules and levels. That is real money on a large site, which is the point of the route.

Fees and the cost of each route

Outline fees are charged by site area in bands, subject to a cap, while full application fees are charged on the number of dwellings or the floorspace created. Reserved matters applications carry their own fee. Fees are set nationally and revised with indexation, so check the current schedule rather than a figure from a previous job.

The total fee across an outline plus reserved matters is usually higher than a single full application. The saving is in the professional fees deferred, not in the council's charges. On a five unit scheme that saving is modest and the extra application cycle adds months.

Two other costs belong in the comparison. Conditions discharge fees on each route, and the cost of running two rounds of consultation, which on a contentious site means two rounds of objection.

The time limits that apply

The standard full permission must be begun within three years, under section 91 of the Town and Country Planning Act 1990. An outline permission runs under section 92: an application for approval of the reserved matters must be made within three years of the outline permission, and the development must begin within two years of the final approval of the reserved matters.

Authorities can and do impose different periods. Read the condition on the decision notice rather than assuming the default.

The two limbs are independent, which is the part people miss. Applying for reserved matters in year three leaves you with two further years, so an outline permission can support a build start five years after the original decision. Miss the three year deadline for the reserved matters application and the outline permission lapses entirely.

What a buyer or lender will accept

A detailed permission is worth more per plot than an outline because the buyer can price the build. An outline permission with all matters reserved leaves a purchaser carrying design risk, planning risk on the reserved matters, and the cost of the second application.

Where land is being promoted, outline is still normally right. The promoter is selling the principle, and a housebuilder will want to design to its own house types anyway, so detailed consent for someone else's layout has little value.

Serviced self build plots sit awkwardly. Plot buyers want freedom to design, which argues for outline, but lenders want certainty, which argues for detail. The usual compromise is an outline permission with a design code or parameters attached, which we look at in self build planning permission on a serviced plot.

Choosing on a single plot

For one house on a plot you own and intend to build, a full application is usually the better route. The evidence base is the same either way, the design work is needed for building regulations regardless, and a single decision avoids a second eight week wait.

Outline earns its place on a single plot in two situations. Where the principle is uncertain, for example a gap site in a settlement boundary dispute or a countryside location, and you do not want to spend on architect's drawings before finding out. And where you intend to sell rather than build.

An illustrative example. A paddock on the edge of a village, outside but adjoining the settlement boundary, with an uncertain policy position. An outline application with access included and the other matters reserved costs a fraction of a full submission and tests the principle. If it succeeds, the design work follows with the risk removed. If it fails, the appeal is about principle alone, which is a cleaner argument to run.

Whichever route you take, the supporting statements carry the policy case, and a design and access statement is required for most applications in designated areas and for major development.

Enter your postcode on PlanScope to see which reports your site is likely to need for either route, and draft them before you fix the application strategy.

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.