Finding the Historic Environment Record for your site

The Historic Environment Record is the county or unitary authority's database of known archaeological sites, historic buildings, find spots, past investigations and historic landscape character. It is the first source any archaeological desk-based assessment draws on, and the local authority's archaeological adviser will check that your assessment used it. A study that cites only online national datasets will be sent back.

Ordering the search is a small administrative job with a lead time attached. Do it in the first week of a project, not the week before submission.

Who holds the record and how to request a search

Records are held at county level in two-tier areas, by the unitary or metropolitan authority elsewhere, and by national park authorities within their boundaries. In Greater London the Greater London Historic Environment Record is maintained by Historic England rather than by the boroughs.

Most services publish a request form and a charging schedule. A commercial search, which is what a development project needs, is priced by search area and by whether you want a data extract, a mapped output or an interpretive statement. Free or reduced-rate access is usually reserved for academic and community enquiries, and using that route for a commercial project will be refused when the purpose is disclosed.

Ask for the data in a usable form. A spreadsheet of records with grid references and a shapefile or geospatial export saves hours against a printed gazetteer, and most services will supply it on request even where the standard output is a document.

What a search returns

The output is structured into record types, and the terms matter because the adviser uses them.

• Monument records describe a site, structure, earthwork or landscape feature, with a period, a type, a source and a confidence level.
• Event records describe an investigation: an excavation, a watching brief, a geophysical survey or a building recording exercise, with its outcome, including negative results.
• Find spots record isolated artefacts, often reported through the portable antiquities scheme.
• Designation records duplicate the national datasets for listed buildings, scheduled monuments, registered parks and conservation areas.
• Historic landscape characterisation describes the character of the wider area rather than individual sites.

Event records with negative results are the ones applicants underuse. A watching brief on the adjoining plot that found nothing at all is direct evidence about survival on your site, and it carries far more weight with an adviser than a general statement about potential.

Search radii and what they should cover

There is no universal radius. The study area should be chosen to suit the site and the question, and the convention in most desk-based assessments is a core radius around the red line with a wider sweep for setting and landscape context.

A 500 metre radius is common for a small urban site, one kilometre for a village edge scheme, and more where the site sits in a landscape with earthwork monuments or where setting is in issue. Say in the report why you chose the radius you did. An adviser challenging a 250 metre search on a rural site is really asking whether you looked hard enough.

Where the site straddles an authority boundary, order from both services. Records stop at the boundary and neither will have the other's data.

Fees, turnaround and the lead-in

Charges vary by service and are published. Turnaround is usually quoted in working days rather than weeks, and ten working days is a figure many services use, though it lengthens in summer and around local government budget cycles. Some offer a paid express service.

Budget for the data and for the time. On a scheme where the archaeology sits on the critical path, ordering the search on day one and the geotechnical logs at the same time lets the deposit model be built while other work runs in parallel. The record search and the archaeological adviser's pre-application view together tell you whether you are facing a desk study or trial trenching, which is the difference the programme turns on. The trigger position for evaluation is set out in Archaeological Priority Areas and what triggers evaluation.

Reading the records properly

A record is an index entry rather than a settled finding. Each carries a source reference, and the source is often a published report, an unpublished grey literature report, an antiquarian account or an aerial photographic transcription. The reliability differs enormously between those, and a good assessment says which it is relying on.

Check the confidence field and the grid reference precision. A monument recorded to a four-figure grid reference could be anywhere within a kilometre square, and treating it as a point on your site boundary is a mistake in both directions. Where a record looks decisive, follow it back to the source document. Grey literature reports are frequently available through the Archaeology Data Service, and the record will give you the citation.

Where a listed building sits within the search area, the significance work runs alongside the archaeological study, and the distinction between the two documents is covered in Heritage Statement or Archaeological Desk-Based Assessment.

Historic mapping sits alongside the record rather than inside it. Ordnance Survey county series editions, tithe and enclosure maps and wartime aerial photography are ordered separately, usually from the county record office, and they answer questions about made ground and demolition that the record cannot.

Using the results to scope the assessment

The record search feeds three parts of an Archaeological Desk-Based Assessment: the baseline, the deposit model and the statement of potential. The baseline lists what is known. The deposit model, built from records, borehole logs, historic mapping and made ground depths, predicts what survives and at what level. The statement of potential expresses that as a likelihood by period.

It also shapes the conversation with the county archaeologist, whose advisory role is described in Archaeological Priority Areas and county archaeologist advice. Take the record search to the pre-application meeting rather than arriving with questions, because the adviser will have read the same records and will expect you to have too.

A desk-based assessment should be prepared by someone with the relevant professional competence, working to the published standards of the Chartered Institute for Archaeologists, and councils will say so if the author is unqualified.

Feeding your results back

Conditions on archaeological work usually require the resulting reports to be deposited with the Historic Environment Record and reported through the national index of archaeological investigations. That is not an afterthought. The discharge application will not be approved until the deposition is evidenced, and the record officer can take weeks to confirm receipt.

Report negative results too. A watching brief that found nothing becomes the event record that helps the next applicant on the adjoining plot, and the record is only as good as what people put back into it.

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