Post-excavation assessment, archive and publication

Post excavation assessment is the stage that starts when the excavator leaves site and finishes, on a large urban scheme, three or four years later. It is also the stage most development appraisals forget, because the fieldwork invoice feels like the end of the archaeology and it is roughly the halfway point.

The usual archaeological condition has three limbs: a written scheme of investigation approved before work starts, fieldwork carried out in accordance with it, and a programme of post-excavation analysis, publication and archive deposition completed within a stated period. The third limb keeps the condition live long after the building is occupied, and an undischarged condition is a title problem when you come to sell or refinance.

What happens when the machines leave

The site archive comes off site as boxes of finds, environmental samples, context sheets, drawings, photographs, survey data and site records. None of it means anything yet.

The first task is stabilisation: washing and marking finds, processing bulk samples, and conserving anything fragile before it deteriorates. Metalwork from waterlogged deposits has a short window before it is unrecoverable, and an x-ray programme for ironwork is usually needed before anyone can decide what matters.

Then comes quantification. Every material class is counted and weighed so the specialists can say what potential the assemblage holds.

The assessment report and the updated project design

The assessment report sets out what was found, what the archive contains, and what questions the material could answer if analysed. It is written against the research framework for the region, so the argument is always comparative: this assemblage matters because of what it adds to a known gap.

Attached to it is an updated project design. That document proposes the analysis programme, names the specialists, sets the publication route and the word count, defines the archive to be deposited, and gives a timetable and a cost. The county archaeologist or the archaeological adviser to the council reviews and agrees it, and that agreement is what the eventual discharge of the condition is measured against.

Agree the updated project design promptly. A developer who leaves it for a year has an archive sitting in a contractor's store accruing charges, and a specialist market that has moved on.

Analysis, specialists and the dating budget

Analysis is where the money goes. Pottery, animal bone, human remains, charred plant remains, pollen, industrial residues, worked stone, glass and small finds each go to a different specialist, and each produces a report that feeds the synthesis.

Scientific dating drives the programme more than anything else. Radiocarbon determinations take weeks in the queue and are quoted per sample, and Bayesian modelling of a sequence needs enough samples to be worth doing. Dendrochronology depends on whether the timbers have enough rings and sapwood to match a reference sequence, which you do not know until they are sampled.

Human remains carry their own regime. Excavation requires a licence, and the licence conditions set the period for which the remains may be retained for study before reburial or deposition. Osteological analysis has to fit inside that window, so it is scheduled first rather than last.

Publication at a proportionate scale

National policy expects developers to record and advance understanding of the significance of heritage assets that are lost, and to make the evidence publicly accessible. The current Framework, published on 17 August 2026, keeps that requirement. What it does not do is set a scale, and scale is where negotiation happens.

• A watching brief with little recovered normally ends with a client report deposited with the historic environment record and an online index entry.
• A moderate assemblage usually goes to an article in the county archaeological journal or a regional periodical.
• A large or unusual site may need a monograph, with illustration, editing and print costs to match.
• Digital publication with an open access data deposit is increasingly accepted in place of print, and it is cheaper and faster.

Push for the proportionate option early and in writing. The updated project design is the place to argue that a site of local interest does not need a monograph, and that argument is far harder once the analysis is complete.

Every project also generates an online index record that links the report to the historic environment record, and that record is how the next applicant finds your results. Which is why the material gathered at desk study stage in an Archaeological Desk-Based Assessment is only as good as the last developer's compliance.

Preparing and depositing the archive

The archive has two halves. The material archive is the finds and samples; the documentary archive is the records, drawings, photographs and digital data.

Museums with an acquisition policy take material archives, and many have closed to new deposits or charge per box. Establish before fieldwork which museum will accept the archive, on what terms and at what rate, because a site whose archive has nowhere to go cannot be signed off. Where no museum will take it, the fallback is a digital archive with an accredited repository plus an agreement on the physical material, and the council's adviser has to accept that arrangement.

Transfer of title is a paperwork task that catches people out. Finds belong to the landowner, so a signed transfer of ownership to the receiving museum is needed, and on a site assembled from several titles that means several signatures. Get them while the land deals are live.

The costs that arrive after practical completion

Build the post-excavation budget at the point you commission the fieldwork, not after. A contractor's fieldwork quotation that excludes assessment, analysis, publication and deposition is not a price for the archaeology, and comparing two quotations on that basis is meaningless.

Retain a proportion of the archaeological budget until the condition is discharged, and hold the contractor to the timetable in the updated project design. Where the scheme is being sold on, the obligation and the money need to follow the land, usually by an indemnity or a retention held on completion.

Timing matters as much as amount. On a site where the evaluation has already shown deep stratified deposits, the question of whether to evaluate before or after determination changes the whole risk profile, which we look at in archaeological evaluation before or after determination.

Getting the condition discharged

Submit the discharge application with four things: the final report, evidence of publication or acceptance for publication, the accession number or deposition receipt from the receiving repository, and the online index record reference.

Councils vary in how strictly they hold the line on publication, and some will discharge on acceptance rather than on appearance in print. Ask early which the archaeological adviser expects, because a journal can take eighteen months from acceptance to publication and that gap is not something the developer can control.

Where standing buildings are involved as well as below-ground remains, the recording condition runs in parallel and is usually discharged separately. A Historic Building Recording to the appropriate level has its own archive and deposition requirements, and the two archives are normally kept together.

The practical rule is this: agree the updated project design within three months of the fieldwork ending, fix the museum before the first trench is opened, and keep the money for the last stage. PlanScope can draft the Heritage Statement and the desk-based assessment that frame the case in minutes, with site facts flagged where they are missing, and an Archaeological Field Evaluation scope to go with them. 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.