Briefing an ecologist before the survey season

Briefing an ecologist before the survey season decides whether your application goes in this year or next. Most ecological survey windows are short, several close by the end of June, and a scoping decision taken in March instead of November can cost a full twelve months. The brief itself takes an afternoon to write and it is the highest-value afternoon in the programme.

What the ecologist needs is short. It is the site boundary, the proposals, the phasing, the lighting, and the date the application has to be submitted.

What the ecologist needs from you

Send all of this at the point of enquiry rather than drip-feeding it:

1. A red line boundary and the site address with a grid reference, plus any land outside the red line that you control.
2. Existing site plan and elevations, and the proposed layout at whatever stage it has reached.
3. The extent of demolition, roof works, tree removal and hard surfacing.
4. Any external lighting proposals, or a note that none have been designed yet.
5. Site history: previous uses, when buildings were last occupied, when vegetation was last managed or cleared.
6. Known constraints already identified, including designations, watercourses and mature trees.
7. Your target submission date and the reason for it.
8. Access arrangements, including whether the site is occupied, tenanted or has livestock.

The lighting point is the one people leave out and the one that most often generates a second round of work. Bats, in particular, are sensitive to lighting, and a scheme designed without a lighting strategy is a scheme that gets a condition requiring one later.

Say what stage the design is at. An ecologist scoping against a fixed layout works differently from one advising on a concept, and both are legitimate.

Site access and constraints

Surveys need access at specific times, including before dawn and after dusk. On an occupied site, a tenanted farm or a building with a working business, that has to be arranged rather than assumed.

Confirm who holds keys, whether roof voids and cellars can be entered safely, whether there is livestock, and whether any part of the site is fenced off or unsafe. A wasted visit is chargeable and, worse, it may fall outside the survey window if it cannot be rescheduled quickly.

Where neighbouring land needs to be accessed for an emergence survey vantage point, ask the neighbour early. Bat surveyors positioned on the wrong side of a building record nothing useful.

Scoping the survey suite

The starting point is a preliminary ecological appraisal, which combines a desk study of records and designations with an extended walkover assessing habitats and the potential for protected species. It can be done at almost any time of year, though habitat classification is more reliable between April and September.

From that appraisal come the recommendations. Expect it to identify which of the following are needed and to justify each one rather than listing everything:

• Bat roost assessment of buildings and trees, followed where necessary by emergence and re-entry surveys.
• Great crested newt assessment of ponds within the relevant radius, by environmental DNA or by population survey.
• Reptile presence or absence survey where rough grassland, scrub or brash piles are present.
• Breeding bird survey where vegetation or buildings will be removed in season.
• Badger, dormouse, water vole or otter survey where the habitat and records support it.
• Habitat condition assessment for the biodiversity net gain baseline.

Challenge a recommendation that is not justified. A good appraisal explains why each survey is needed and what it will resolve, and it says plainly where no further work is required.

Season windows and programme risk

This is the part to put on a chart. Approximate windows in England:

Two dates do most of the damage. The newt environmental DNA window closing on 30 June means a project that scopes in July waits until the following spring. And the bat emergence season closing in September means an appraisal commissioned in August leaves no time for the follow-up surveys it recommends.

Commission the appraisal between October and February. That gives a full season ahead of you and turns a twelve-month delay into none. Our note on checking whether a survey is still valid covers the other end of the problem, where surveys age before determination.

Reporting dates against submission

Agree three dates in writing: when fieldwork ends, when the draft report arrives, and when the final report is issued. Then work backwards from the validation date, not forwards from the survey.

Allow time between draft and submission for the recommendations to be designed into the scheme. Mitigation that appears only in the ecology report, and not on the drawings, is the commonest validation query in this area. Bat access tiles, bird boxes, a lighting strategy and habitat retention all need to be on the plans.

Where biodiversity net gain applies, the Biodiversity Net Gain Assessment has its own timetable, because the baseline habitat condition assessment has to happen in the growing season and the gain plan follows the permission rather than preceding it. Clearing habitat before the baseline is recorded does not help: the statutory regime provides for a degraded baseline to be taken from an earlier date where habitat has been damaged since 30 January 2020.

Costs of a repeat season

A missed window costs more than the survey. It costs the option or bridging finance for another year, the professional fees of a team standing still, and in some cases the loss of the site.

There are two ways to reduce the risk and both are decided at brief stage. Scope early enough that every recommended survey can run in one season. And where a survey result is uncertain, ask the ecologist to advise on a precautionary approach that could be secured by condition, because some authorities will accept a method statement and a licence application in place of a survey result in limited circumstances.

Do not ask for the survey to be skipped. Survey and mitigation for European protected species require a licensed ecologist under the Conservation of Habitats and Species Regulations 2017, and a draft that assumes absence without evidence will not survive consultation with the county ecologist.

Reviewing the recommendations

Read the report as a client rather than filing it. Four checks are worth making.

Does the survey effort follow current good practice guidance for the species, including the number of visits and the time of year. Does each recommendation connect to something the development actually does. Are the mitigation measures deliverable on the site as designed, or do they assume land you do not control. And is anything in the report marked as unresolved.

Where the report recommends a licence, understand which type. Individual licences and registered class licences work differently and have different lead times, and the distinction affects your start date on site.

If you want a reviewer to check a draft before it goes in, the route is the professional directory, and the report index shows which ecology report types are marked as requiring a licensed or competent professional rather than merely recommending one.

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.