Solar farms and continued grazing: the land quality test

A solar scheme that keeps sheep on the land is still development, and it still has to answer the agricultural land question. The test is not whether grazing continues. It is whether the proposal avoids the best and most versatile land where poorer land was reasonably available, and whether the evidence shows that the agricultural capability of the soil survives the 30 or 40 years the array sits on it. Get the soil evidence right and a solar farm with continued grazing becomes a far easier case to argue.

Where applications come unstuck is the order of the work. The land classification survey is commissioned after the layout is fixed, and by then the layout cannot respond to what the soil scientist finds.

The policy position on agricultural land

National policy has pointed solar development towards previously developed and poorer quality land for over a decade. A written ministerial statement in March 2015 set that direction for ground-mounted solar specifically, and the National Planning Policy Framework (August 2026 edition) continues to expect the economic and other benefits of the best and most versatile agricultural land to be taken into account, with poorer quality land preferred where farmland has to be used at all.

Best and most versatile land, usually written BMV, means Grades 1, 2 and 3a under the Agricultural Land Classification. Grade 3b, 4 and 5 land sits outside it. That single boundary between 3a and 3b decides how much weight the loss argument carries, and it is a soil judgement, not a map reading.

Scale sets the consent route. Smaller schemes go to the local planning authority as a full application. Large ground-mounted schemes cross into nationally significant infrastructure under the Planning Act 2008 and are determined by the Secretary of State, and the capacity threshold for that has been changed in recent years, so confirm the current figure before you plan a route.

Land classification evidence and its weight

Natural England's provisional ALC maps were produced at a regional scale. They are a screening tool and nothing more. A provisional Grade 3 covers both 3a and 3b, which is precisely the distinction the policy test turns on, so a provisional map cannot answer the question an officer will ask.

A site-specific survey follows the MAFF 1988 revised guidelines: auger borings and soil pits on a grid, with assessment of climate, soil depth, texture, stoniness, wetness class and droughtiness. The output is a graded plan of the site with the area of each grade. That is the document that carries weight, and councils expect a soil scientist to have written it, so an Agricultural Land Classification report should be commissioned early and reviewed by someone suitably qualified before it is submitted.

Timing is practical rather than seasonal. Surveys can be done through the year but not on waterlogged ground, because wetness class and workability cannot be assessed sensibly when the profile is saturated. A wet February on a heavy clay site means waiting.

Demonstrating that agricultural use continues

Continued agricultural use does two things in planning terms. It softens the land use objection, because the holding keeps producing. And it supports the argument that the loss is temporary and reversible rather than permanent.

Evidence that stands up tends to include:

• A grazing or management plan naming the stock type, stocking density and the months the land is grazed
• A tenancy or grazing licence arrangement, or a statement from the farm business that will use the land
• Confirmation that the land remains registered as agricultural for subsidy or holding purposes
• A soil management plan covering construction, operation and reinstatement
• Fencing and access detail that lets stock move between compartments

Officers are rightly sceptical of a line in a Planning Statement promising sheep. A named farm business, a stocking figure and a plan showing where water troughs and handling pens go reads very differently.

Panel height, spacing and stock

The design has to work for the animals before it works for the argument. Sheep need clearance beneath the lowest edge of the modules, headroom under the array for the shepherd, and gaps between rows wide enough for daylight to reach the sward. Cattle generally do not work under conventional arrays at all, which is why almost all operating dual-use sites in England are sheep systems.

Treat the following as the parameters to evidence rather than as standards, because they are scheme specific:

Set these out as parameters in the application and secure them by condition. A scheme consented on a plan showing 0.8 m clearance and then built at half that has lost the grazing case.

Biodiversity under the array

Mandatory biodiversity net gain under the Environment Act 2021 requires a 10 per cent uplift measured with the statutory metric and secured for 30 years. Grassland beneath and between rows is where most solar schemes find that uplift, through a change from arable or improved grassland to a species-rich or other neutral grassland condition.

That creates a direct tension with grazing intensity. A habitat condition assessment that assumes light, late-season grazing cannot sit alongside a farm plan that assumes a tight rotation of ewes and lambs through the spring. The metric, the grazing plan and the habitat management and monitoring plan have to describe the same regime, and a competent person has to complete the metric because the gain plan goes to the authority for approval.

Where the array sits in a sensitive landscape, the visual case runs on its own evidence base. A Landscape and Visual Impact Assessment prepared to GLVIA3 should test the array, the fencing, the inverter stations and the substation together, because the ancillary buildings often drive the objection rather than the panels.

Decommissioning and soil protection

Permissions for ground-mounted solar are commonly time limited, with a condition requiring removal and restoration at the end of the period. The restoration case is only credible if the construction case was.

Build soil protection into the submitted documents:

1. Soil handling and storage method following Defra's construction code of practice for the sustainable use of soils on construction sites
2. Defined construction corridors and compound locations, with the rest of the field kept off limits to plant
3. Trafficking restrictions tied to soil moisture conditions rather than calendar dates
4. A baseline soil condition survey before works, so reinstatement can be measured against something
5. A decommissioning method statement, with the piles withdrawn and the cable ducts removed or grouted

The document pack

For a mid-sized scheme on grazing land outside designated areas, the submission usually carries a Planning Statement, a Design and Access Statement, an ALC report, an LVIA, a preliminary ecological appraisal with the biodiversity metric and gain plan, a drainage strategy, a construction traffic management plan, a soil management plan and a glint and glare study. Heritage, archaeology and flood evidence come in where the constraints call for them. Glint and glare and soil management plans sit outside the 66 report types PlanScope drafts, so budget for those separately.

The narrative documents are the ones that eat agent time without adding much to the evidence base, and PlanScope drafts them from a postcode, a site boundary and a short set of answers, inserting a TO BE CONFIRMED flag wherever a site fact is missing instead of guessing it. Pair that with the specialist surveys and the pack holds together. If you are also looking at a battery compound or roof arrays on the farm buildings, see battery storage alongside a solar scheme and roof mounted solar on agricultural buildings, which take different policy routes.

Start with the soil. Enter your postcode on PlanScope to see which reports the site is likely to need before you commission any of them.

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