What a county archaeologist expects with your application

When a council consults its archaeological adviser on your application, that adviser is looking for four things: a search of the Historic Environment Record, a desk-based assessment that interprets it, a view on whether the site retains archaeological potential, and a proposal for what happens next. The county archaeologist information required at validation is rarely a long list, but each item has a defined form, and a submission that misses one usually comes back as a holding objection rather than a refusal.

Most delays here are sequencing problems, not evidence problems.

The archaeological adviser's role in the process

Archaeology is a material consideration, and national policy expects applicants to describe the significance of any heritage assets affected, including buried remains, using evidence proportionate to their importance. Most English authorities do not employ an archaeologist directly. They buy advice from a county council archaeology service, a shared service or a consultant acting as adviser, and that adviser writes the consultation response the case officer relies on.

The adviser has three practical outcomes available: no objection, no objection subject to a condition requiring investigation, or an objection on the basis that the application cannot be determined without further information. The third is what you are trying to avoid, and it is triggered by absent evidence far more often than by the archaeology itself.

Scheduled monuments are different. Works affecting a scheduled monument need separate scheduled monument consent from the Secretary of State under the Ancient Monuments and Archaeological Areas Act 1979, and the planning application does not deal with it.

Historic Environment Record search outputs

The Historic Environment Record is the county-level database of known sites, finds, monuments and previous investigations. A search returns a data set, not a report, and the adviser expects to see that it was obtained from the relevant record office rather than copied from an online map viewer.

What the search should produce for the assessment:

• A gazetteer of records within a stated search radius, with record numbers and a plan showing their positions.
• Previous archaeological events on and around the site, including negative results, which matter as much as positive ones.
• Designated assets within the study area, with grades and designation references.
• Historic landscape characterisation where the county holds it.
• Any local list or area of archaeological interest defined in the development plan.

State the search radius and justify it. Many advisers expect 500 metres for a small site and more for anything larger, but the radius should reflect the archaeological character of the area rather than a default. Record the date the search was supplied, because an assessment relying on a record extract that is several years old gets queried.

Some record offices charge for commercial searches and have a turnaround of a couple of weeks. That is a programme item.

Desk-based assessment contents expected

An Archaeological Desk-Based Assessment prepared to the Chartered Institute for Archaeologists standard is the usual vehicle. Advisers read it for the interpretation, not the data dump.

The contents that get an assessment accepted:

1. The site and the proposed development, including the depth and extent of ground disturbance, foundations, services and any piling.
2. The planning and policy framework, including the relevant development plan policy.
3. Methods and sources, with the record search, cartographic sources, aerial photography, geotechnical data and any Lidar consulted.
4. The baseline, period by period, drawing on the record and on the wider archaeological context.
5. An assessment of archaeological potential by period, with a reasoned confidence level.
6. The significance of any assets identified, in heritage terms rather than by reference to their physical condition.
7. An assessment of the effect of the proposal on that significance, keyed to the actual ground disturbance.
8. A recommendation on further work.

The two sections most often thin are ground disturbance and effect. An assessment that describes the archaeology well and then says nothing about pile positions or the depth of a basement leaves the adviser unable to judge the effect, which is the question they are being asked.

Use the historic mapping properly. Nineteenth-century extraction, made ground and twentieth-century demolition often reduce potential, and showing that with evidence is what converts a field evaluation request into a watching brief condition.

When field evaluation will be requested

Field evaluation is requested where the desk-based work establishes potential that cannot be resolved from documents. That usually means geophysical survey, trial trenching or both, delivered as an Archaeological Field Evaluation before determination.

Pre-determination evaluation tends to be asked for on greenfield sites of any scale, on sites inside a defined area of archaeological interest or potential, where the record shows known remains extending towards the site, and where the proposal would remove the archaeological resource entirely. Post-determination investigation secured by condition is more usual on small urban infill, on sites with extensive made ground, and where the development footprint can be designed to preserve remains in situ.

Where you think the issue can be handled by condition, say so and explain why, with reference to the depth of disturbance and the extent of previous ground working. Advisers respond to a reasoned case. They are far less receptive to an assertion that a condition will do.

Geophysical survey has practical constraints worth planning for: it needs reasonable ground conditions, it is compromised by services, hardstanding and fencing, and crop cover affects access. Trial trenching needs landowner access, a method statement agreed in advance and, on agricultural land, a sensible window.

Written scheme of investigation contents

Whether the work is pre-determination or condition-led, it proceeds under a written scheme of investigation approved in writing by the authority. A scheme that the adviser can approve first time states:

• The aims and the specific research questions, linked to a regional research framework where one exists.
• The methodology, with trench positions and percentage sample for evaluation, or the trigger and response arrangements for a watching brief.
• Personnel and their relevant experience, and who holds overall responsibility.
• Health and safety, services clearance and reinstatement.
• Treatment of human remains, finds and environmental sampling, with a sampling strategy.
• Monitoring arrangements and how the adviser will be notified of the start.
• Reporting, archiving and publication, with timescales.

Trench positions should respond to the development layout and the baseline, not be spread evenly for appearance. An adviser who sees trenches avoiding the area of highest potential will say so.

Reporting, archive and publication

The obligation does not end with the fieldwork. A record of the investigation goes to the Historic Environment Record, an online index entry is created for the event, the finds and the paper and digital archive are deposited with a museum or repository that will accept them, and anything of more than local interest is published.

Museum deposition has become the hard part. Many museums have closed their collections to new archaeological archives, and the receiving body has to be identified at the written scheme stage rather than after the dig. Agree the destination and any deposition charge before fieldwork begins.

Keep the reporting timescale in the written scheme realistic. A condition that requires deposition of the archive within a stated period after completion is enforceable, and an unresolved archive blocks the discharge.

Sequencing to avoid a validation delay

Order the work like this: commission the record search first, write the desk-based assessment against the actual ground disturbance drawings, take the assessment to the adviser informally before you submit, and only then decide whether evaluation is needed before determination. The Planning Statement should summarise the archaeological position and state what is proposed, so the case officer is not reading the technical report to find the answer.

Pre-application engagement is the single most useful step. The adviser will usually say what they need from a short description and a plan, which costs less than discovering it at week eight. Where other evidence has similar sequencing traps, the same pattern shows up in the checklist for discharging a drainage condition.

Draft your archaeological supporting documents in minutes and send them for professional review, then browse the full set of report types to check what else the site triggers.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Archaeological assessment and field evaluation are report types where councils usually expect a suitably qualified author, and professional review is strongly advised. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.