An archaeological desk-based assessment is often the first formal archaeology document requested during the planning process. It is a non-intrusive study that draws together existing information about a site and its surroundings to understand whether archaeological remains may be present and how significant they could be. For applicants, it is an early evidence-gathering step that helps shape decisions before any ground is broken.
What the assessment actually does
A desk-based assessment does not dig trenches or disturb the ground. Its purpose is to assemble and interpret the evidence that already exists.
- It reviews historic maps, aerial imagery, previous investigations, archaeological reports and local and national record sources.
- It considers the proposed development site and usually the surrounding area, because archaeology does not stop neatly at plot boundaries.
- It assesses archaeological potential, likely significance and the possible effect of the proposed development.
- It helps planners decide whether no further work is needed or whether evaluation, mitigation or another stage of investigation may follow.
Why a DBA matters in planning
A desk-based assessment is useful because it turns uncertainty into a manageable planning issue. It helps everyone understand the heritage risk attached to the site.
- The local authority can use it to judge whether archaeological issues have been addressed at an appropriate stage.
- Owners and developers can use it to anticipate time, cost and programme implications before construction starts.
- Architects and planners can use it to refine layouts, service routes and ground disturbance where archaeology is likely to be sensitive.
- Where no major issue is identified, the report can provide reassurance and support a smoother route through planning.
What a strong DBA should contain
A well-prepared report is more than a data dump. It should interpret the material and relate it directly to the proposal.
- A clear site description and summary of the development proposal.
- A review of relevant historic environment sources, including HER data, maps, images and published material.
- An assessment of archaeological potential by period, asset type or location within the site where appropriate.
- A reasoned conclusion on likely impact and recommendations for any next steps, if further work may be required.
Frequently asked questions
Does a desk-based assessment involve site excavation?
No. It is a non-intrusive study based on existing information, although a site visit may still form part of the assessment process.
Can a DBA be needed for a small site?
Yes. Size alone does not determine need. A modest plot in a sensitive historic location may still require one.
Does a DBA guarantee there is no archaeology on site?
No. It assesses known and potential archaeology based on available evidence. Sometimes the outcome is that further field evaluation may still be sensible.
Need advice on this type of project?
AS Archaeology & Heritage Services prepares archaeological desk-based assessments that are proportionate, planning-focused and clearly tied to the proposed development.
Related links: Desk-Based Assessments | Reports | Contact AS Archaeology