Start with a clear picture. A PEA brings the ecological baseline and your development proposal together, so you can plan the right next step.
ACP scopes the desk study, site walkover and report around your project. Understand the constraints, design opportunities and any further surveys before fixing the programme.
Defined desk study & walkoverHabitat evidence linked to designClear further-survey adviceTransparent scope & fees
READ THE SITE. DEFINE THE NEXT STEP.
More than a record of a visit.The value of a PEA is a clear account of what the evidence means for the next stage.Desk study + site walkover + proposed works → appraisal report → constraints, opportunities and further evidence.
Know what you are commissioning
A focused initial appraisal for your project.
A Preliminary Ecological Appraisal is commonly shortened to PEA. It normally combines a desk study and site walkover to identify likely ecological constraints, opportunities and further investigation needs.
01 / UNDERSTAND
The ecological context
Review relevant records, existing reports and the setting of the site. Establish what is already known and which sources are appropriate to the proposal.
Record habitats and relevant ecological features through a scoped walkover. Identify potential issues that need closer investigation, including limitations affecting the findings.
Relate the evidence to the works. Explain design considerations, any further surveys and what needs resolving before the ecological assessment can progress.
Desk evidence and site observations, assessed together.
We agree the study area, records and survey detail before instruction. This avoids a report that records the wrong boundary or fails to consider part of the proposed working area.
01 / Desk study
Read the site in its setting.
The review can include previous ecological reports, relevant records, designated sites and other available environmental information. The search area and information sources depend on the proposal and likely effects.
We identify the date and limitations of information used. An absence of records does not establish that a species is absent.
Bring earlier evidenceShare complete reports, appendices and survey dates, not just the conclusions.
Confirm the development areaInclude access, services, temporary compounds and any off-site works relevant to the brief.
02 / Walkover survey
Record the features that matter.
The walkover establishes the habitat baseline and identifies features that may warrant further ecological investigation. Mapping and survey detail are selected to suit the agreed purpose.
We record relevant limitations, such as inaccessible areas, recent land management or seasonal constraints. The report explains how those affect interpretation.
Plan access before the visitArrange access to the agreed survey areas and flag any safety or landowner restrictions.
Share the current layoutThe ecologist needs to understand what will change, not simply where the site is located.
A useful PEA report
Evidence, implications and a practical action list.
The report should help you and your design team understand the ecological starting point. We agree the deliverables and any design meeting or planning-response support included in the quotation.
Site and briefThe surveyed boundary, proposed works, planning context and purpose of the appraisal.
Baseline and methodsDesk-study sources, walkover methods, dates, habitat information and relevant mapped observations.
Constraints and limitationsPotential ecological issues, the basis for interpretation and gaps that affect what can be concluded.
Recommendations and next stepsDesign considerations, opportunities, further investigation and the information required to progress the assessment.
Where additional evidence is needed, the report identifies the question it must answer. That gives your team a clearer basis for commissioning the next stage.
A PEA is most useful when its findings influence the proposal.
For example, a walkover may identify a habitat edge that overlaps a proposed access route. The next discussion can consider retention, alternative access and whether specialist evidence is needed.
That is an illustrative design question, not a conclusion about your site. The appropriate response depends on the recorded features and likely effects.
We can discuss recommendations with your planning or design team within an agreed scope, so the report feeds into decisions rather than remaining a standalone document.
Three questions for the project team
What can change now?Review the position of buildings, access and working areas against the ecological baseline.
What needs evidence first?Identify where an assumption about habitat or species must be tested before a conclusion is reached.
What is the next milestone?Agree the information and further work needed before final assessment, submission or another project decision.
After the appraisal
Choose the next step from the findings.
The outcome is not the same for every site. We explain whether the evidence can support the next assessment stage or whether further investigation is needed.
Next step
Why it may be needed
Route to the right scope
Specialist species evidence
A relevant habitat feature or species question needs detailed investigation.
The evidence needs interpreting against the final proposal, including any design response.
Agree the additional assessment and report needed for the application. An initial appraisal is not automatically that final report.
BNG evidence
The project has biodiversity net gain requirements and needs the appropriate habitat information and calculation.
Coordinate survey inputs with the BNG scope. Confirm any condition assessment or metric work separately.
A revised brief
The boundary, layout or proposed works have changed since the appraisal.
Review the existing evidence against the changes before relying on earlier conclusions.
PEA survey costs & programme
A clear initial scope. No undefined package.
The fee reflects the site, evidence sources, survey detail and reporting required.
We identify the desk study, visit, mapping and report included. The quotation also explains records charges, VAT, travel assumptions, revisions and any separately commissioned follow-up.
Initial review can begin throughout the year. The usefulness of field evidence depends on the habitats, access and season. A later specialist survey may have a narrower window.
Tell us the intended submission date before booking. We distinguish the PEA delivery date from the time needed to complete any further assessment.
Site location and boundaryA postcode and plan showing the land and works to be assessed.
Your proposalLatest layout, demolition, access and other relevant design information.
The council’s requestValidation comments, an ecology consultee response or relevant planning wording.
Previous reports and milestonesExisting ecology evidence, important dates and known site-access constraints.
Your location, your proposal
Local context. A site-specific scope.
We welcome planning enquiries across England, including Greater London, the South East, East of England and the Midlands. Tell us the postcode and relevant planning authority; we will confirm survey arrangements and availability.
Use the council’s actual request
A county name alone cannot define the survey requirement. We review the validation request, consultee comments or planning condition against your proposal and existing evidence.
Coordinate the whole site
Include temporary access, service routes, compounds and off-site works where relevant. Your quotation identifies the survey area, travel assumptions and landowner access needed.
Before you commission
Preliminary Ecological Appraisal questions.
For wider or multiple survey requirements, return to the main Ecology page. This page focuses on commissioning and using a PEA.
01Are PEA and Preliminary Ecological Appraisal the same thing?
Yes. PEA is the abbreviation for Preliminary Ecological Appraisal. A “PEA survey” enquiry usually concerns the site work and report that form this initial appraisal.
02Is “preliminary ecological assessment” another name for a PEA?
The phrase is sometimes used for an initial appraisal, but it does not define the exact deliverable on its own. Send the council’s wording and we will clarify the survey method, report and any further assessment expected.
03Can I submit only a PEA with my planning application?
Do not assume the initial report is sufficient. It may identify further surveys or assessment that the application needs. We explain the evidence gaps and the report required for the actual proposal.
04Does a PEA include a bat or newt survey?
It can identify potential constraints and recommend specialist work. A detailed bat survey, newt eDNA survey or other species investigation is not automatically included. The quotation states the separate scope where needed.
05Is BNG included in the PEA price?
Only where it is expressly scoped. Habitat information can be coordinated, but the statutory metric and related BNG documents have different requirements. We identify the additional data and work needed.
06Can you prepare a PEA from a previous site visit?
We need to review the previous evidence, its methods and whether it still represents the site and proposal. We cannot assume that a visit undertaken for another purpose provides all necessary information.
07How long is the report valid?
There is no single reliable expiry date for every site and purpose. Changes to habitat, management, the proposal or information requirements can trigger review. Share the survey date and current plans so we can assess suitability.
08Can I get a quote before I have final drawings?
Yes. Send the site location, available plan and a short description of the intended works. We can identify the information needed to define the initial appraisal, while making any design assumptions clear.
Let’s define the right scope
Tell us where your project is heading.
Start with a short project outline. We will clarify the information needed and prepare a site-specific quotation.
Share the essentials
Your site, planning stage and the help you need.
We review the available evidence
A consultant can request drawings, council comments and previous reports.
Receive a defined scope and fee
Understand the deliverables, programme and any additional work.
