The report pack for a solar farm on agricultural land

The evidence base for a ground-mounted solar farm on farmland is driven by two things that do not feature in a housing application: the quality of the soil under the panels and the reflection off the glass above them. Everything else follows a familiar pattern. Assume an environmental impact assessment screening request, an agricultural land classification survey, landscape and visual work, ecology with a biodiversity net gain calculation, a glint and glare study, transport evidence for the construction phase, and a decommissioning strategy. The order in which you commission them matters more than the list.

Where the scheme sits against the consenting routes

Establish the route before anything else, because it changes the applicant, the decision maker and the timetable.

Below the statutory threshold for a nationally significant infrastructure project, the application goes to the local planning authority as a full planning application. Above it, the scheme is consented by the Secretary of State under the Planning Act 2008 through a development consent order. The onshore generating station threshold for solar in England has been amended, so check the current figure on legislation.gov.uk rather than relying on a remembered number, and take advice where a scheme sits close to it.

Grid connection capacity and the connection date often set the programme regardless of the planning route. Get the connection offer and its milestone dates in front of the planning team early, because a scheme designed around a connection date that later slips is a scheme that gets redesigned.

EIA screening and what the request should say

Solar farms fall within Schedule 2 of the Town and Country Planning (Environmental Impact Assessment) Regulations 2017 as industrial installations for the production of electricity, where the area of the development exceeds 0.5 hectares. Every commercial-scale solar farm clears that threshold, so screening is the starting point rather than an optional step.

Screening does not mean an environmental statement is required. It means the authority decides whether the development is likely to have environmental effects of a scale that warrants one, taking account of the selection criteria in Schedule 3. Most solar farms on unremarkable arable land, away from designated landscapes and heritage assets, are screened out.

A screening request that gets a clean answer contains the site area, the layout, the panel height and coverage, the distance to designated sites and assets, the construction methodology in outline, the cumulative position with any other solar development in the area, and a short assessment against each Schedule 3 criterion. Cumulative effect is the criterion most often dealt with too thinly, and it is the one that most often prompts a request for more information.

Where an environmental statement is required, the Regulations require it to be prepared by competent experts. An Environmental Impact Assessment draft is a starting point for those experts rather than a substitute for them.

Agricultural land classification and best and most versatile land

National policy expects poorer quality agricultural land to be preferred where large-scale development of agricultural land is shown to be necessary. Grades 1, 2 and 3a are best and most versatile land, and the distinction between subgrades 3a and 3b is the one that decides most solar farm arguments.

Published agricultural land classification mapping is too coarse to resolve that distinction. It was produced at a scale intended for strategic planning, and it does not separate 3a from 3b. So a site-specific survey is needed, with auger borings and soil pits at a density appropriate to the area, assessed against the published classification guidelines. The work should be done by a soil scientist, and professional review of the report is strongly advised.

Timing matters. Fieldwork is difficult when the ground is waterlogged or frozen, and impossible under a standing crop in some conditions, so book the Agricultural Land Classification survey against the farming calendar rather than the planning programme.

Two arguments carry weight where best and most versatile land is unavoidable. That the land remains in agricultural use through sheep grazing between and under the arrays. And that the permission is time-limited with a decommissioning condition, so the change is reversible and the soil resource is protected in the meantime.

Landscape and visual evidence

Solar arrays are low, dark and extensive, which produces a different visual effect from a wind turbine. The issue is rarely a single dramatic view. It is the cumulative sense of an industrialised field pattern seen from footpaths, lanes and scattered dwellings.

A Landscape and Visual Impact Assessment prepared to the third edition of the landscape and visual assessment guidelines should include a zone of theoretical visibility, viewpoints agreed with the authority in advance, photomontages from the closest public receptors, an assessment of effects on landscape character at the relevant scale, and a cumulative assessment with consented and proposed solar schemes nearby.

Mitigation for solar is mostly hedgerow. Reinstating and thickening field boundaries, extending them along gaps, and setting the arrays back from the boundary all reduce close-range visibility and deliver ecological value at the same time. Show the planting at year one and at year fifteen, because a section showing only the mature condition invites an obvious challenge.

Glint, glare and safeguarding

Photovoltaic modules are designed to absorb light, and they still reflect some of it. Where the site lies near an aerodrome, a railway, a busy road or dwellings on higher ground, expect a glint and glare study to be requested.

The study models the geometry of reflection through the year against identified receptors, and reports where and when reflection could occur and for how long. Mitigation is usually screening, array orientation, or an anti-reflective coating specification. PlanScope does not produce glint and glare studies, and that work should be commissioned from a specialist.

Safeguarding consultation runs alongside. Aerodrome safeguarding maps, Ministry of Defence safeguarding zones and the Civil Aviation Authority's guidance all bear on sites near airfields, and the relevant railway infrastructure owner will comment where the site adjoins the network. Identify these consultees at feasibility, because a safeguarding objection is difficult to resolve after a layout is fixed.

Ecology, biodiversity net gain and the land under the panels

Solar farms are one of the few development types where biodiversity net gain is comparatively straightforward, because arable land has a low baseline habitat value and the land between arrays can be sown as wildflower grassland.

Commission a preliminary ecological appraisal early, and expect attention to ground-nesting birds on open arable, hedgerows and their condition, any watercourse or ditch network, and badger activity across the site. Where species surveys are triggered, they run in seasonal windows and can hold the programme.

The statutory metric must be completed by a competent person and the biodiversity gain plan approved by the authority after permission. A Biodiversity Net Gain Assessment draft is a starting point for that person. Grassland management under the arrays needs a 30-year management plan that is realistic about grazing, cutting regimes and access for panel cleaning.

Access, construction traffic and the grid connection

The operational traffic from a solar farm is negligible. The construction traffic is not.

Expect the highway authority to want a construction traffic management plan with the delivery route, the number and type of vehicles, wheel washing, the visibility splay at the field access, and any temporary widening or passing places on a rural lane. Abnormal loads for transformers need a separate route assessment. Where hedgerow removal is needed for visibility, check whether the hedgerow is protected under the hedgerow regulations before assuming it can go.

The grid connection cable route is often the part of the scheme that runs furthest from the site and attracts the most third-party land issues. Establish whether it is consented within the application, permitted under statutory undertaker rights, or dealt with separately, and say so in the submission.

Decommissioning and the condition that secures it

Most solar permissions are time-limited, and the temporary nature of the development is central to the planning case. That means the decommissioning strategy is not an afterthought.

1. State the operational period sought and tie it to the connection agreement.
2. Set out the decommissioning method, including removal of arrays, frames, cabling, inverters, substations and access tracks.
3. Describe the soil protection measures during construction and the restoration standard on removal.
4. Offer a condition requiring a detailed decommissioning and restoration scheme to be submitted before the end of the operational period.
5. Address what happens on early cessation of generation as well as at the end of the term.

Councils increasingly ask for financial security for decommissioning through a planning obligation. Raise it before the officer does, with a proposed mechanism, rather than negotiating it in the final fortnight.

Enter the site postcode on the report index to see which of the 66 report types the constraints flag for a given field. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.