A five plot infill taken through validation

A small site planning application pack for five dwellings is not a scaled-down version of a major one. It is a different exercise, because the national list of validation requirements is short and the council's local list is where the work actually sits. The walkthrough below is illustrative, built on a typical paddock infill behind a village street, and it follows the documents rather than the design.

Every figure and response described is illustrative. A real site would produce a different list.

The site, the constraints search and the first surprises

Roughly 0.4 hectares of grazing land behind a row of houses, with an existing field access onto a classified road, inside the settlement boundary of an adopted local plan. Five detached houses, individually built by the owner over three years, which made the scheme a custom build in substance.

The desk search turned up four things. A public right of way clipping the northern boundary. Two mature oaks on the shared boundary, one covered by a Tree Preservation Order. A surface water flood risk band crossing the lowest corner. And a Historic Environment Record entry for a possible field system on the adjoining land.

None of those was fatal. All four changed the document list.

The right of way alone added a diversion question that had to be settled separately from the planning application, under the Highways Act 1980, and starting that conversation early was the single most useful thing done in the first month.

Reading the local validation checklist against the national list

The national requirements are set out in the Development Management Procedure Order 2015: the application form, the correct ownership certificate and agricultural holdings certificate, a location plan and site plan, the fee, and a design and access statement where the development is major or falls within a conservation area or affects a listed building.

Five dwellings outside a designated area is a minor application, so a design and access statement was not nationally required. The council's local list asked for one anyway, and there is nothing improper about that provided the requirement is published, reasonable and relevant. A Design and Access Statement was produced.

The local list produced eleven further items. Sorted by whether they needed a specialist:

Local lists must be published and kept up to date, and councils review them periodically. Download the current version on the day you assemble the pack, not the copy saved eighteen months earlier.

The documents commissioned, and in what order

Sequencing saved about four months.

1. Ecology first, because survey seasons control everything. The preliminary ecological appraisal went out in early spring so that any bat emergence survey could be done between May and August rather than waiting a year.
2. Trees next, because the arboricultural constraints determined where the access and the two eastern plots could go.
3. Topographical survey and drainage together, since infiltration testing needed trial pits in positions the tree report had cleared.
4. Highways once the access position was fixed by the tree root protection areas.
5. Archaeology, which was a desk study and could run in parallel.
6. Design frozen, then the planning statement written last so it could describe the scheme that actually existed.

The mistake most self-builders make is drawing the houses first. Every one of the constraints above moved something, and a design fixed in January would have been redrawn in June.

Biodiversity net gain deserves a separate note. Mandatory net gain applies to small sites from 2 April 2024, with exemptions including certain self-build and custom build schemes of no more than nine dwellings on a site of no more than 0.5 hectares. The scheme here was close enough to that exemption that the ecologist tested it explicitly and documented the conclusion, and the Biodiversity Net Gain Assessment recorded the baseline anyway, because an exemption claimed and not evidenced is an exemption argued about later.

The two items that held validation up

The application was submitted and came back invalid twice.

The first invalidity notice concerned the ownership certificate. Part of the access strip was registered to a neighbouring title, so certificate B applied and notice had to be served on the other owner. Straightforward, and it cost eleven days.

The second was harder. The council wanted a full Drainage Strategy including infiltration testing to a recognised method, and the submitted note relied on a soil map rather than site testing. The lead local flood authority is a statutory consultee on surface water for major development rather than minor, and the local list had made the strategy a validation requirement regardless. There is a procedure for challenging a validation requirement as unreasonable, and it was not used here, because the requirement was reasonable. Trial pits were dug, infiltration proved poor, and the strategy changed to attenuation with a restricted discharge.

Two lessons. Check land registry titles for the access before you draw anything. And treat drainage as a design input rather than a document.

Consultee responses and how each was answered

Six responses came back during the 21-day publicity period and the consultation that followed.

The highway authority asked for visibility splays measured to the correct standard and a refuse collection point within a reasonable drag distance of each plot. Both were drawing changes. The Transport Statement was updated rather than rewritten.

The tree officer accepted the method statement subject to no-dig construction under the canopy of the protected oak and a condition requiring supervision.

The county archaeologist asked for a condition requiring a written scheme of investigation before groundworks rather than pre-determination evaluation, which was the outcome the desk-based assessment had recommended.

Environmental health raised construction hours. The parish council objected on principle to development outside what it regarded as the built form of the village, which the settlement boundary in the adopted plan did not support.

One neighbour objected on overlooking. First floor windows on the eastern elevation of plot 4 were changed to obscure-glazed and non-opening below 1.7 metres, and the objection was withdrawn.

Conditions negotiated before committee

The officer's draft condition list ran to nineteen. Three were negotiated down before the report was finalised: a pre-commencement condition on materials became a pre-superstructure one, a condition requiring full construction details of the private drive was narrowed to surfacing and drainage, and a landscape maintenance period was reduced from ten years to five.

Since 2018 an authority must obtain the applicant's written agreement before imposing a pre-commencement condition, which gives a real opportunity to reshape the list. Use it. An agent who simply agrees to everything to avoid delay hands the client eighteen discharge submissions.

What would be done differently

Order the topographical survey in week one. Pull the land registry titles before the first sketch. Ask the council for a pre-application meeting even at five units, because the fee was less than the cost of one round of invalidity.

And write the planning statement last. A Planning Statement drafted before the drainage strategy is finished usually describes a scheme that no longer exists by submission.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Ecology, arboriculture and drainage evidence of this kind is normally prepared by suitably qualified specialists.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. Browse the report types to see what a minor application pack usually contains.