Writing a scope of works for a specialist report
Most disputes with specialist consultants trace back to a vague instruction. This sets out what a written scope of works should contain, from the standard named to the number of revisions included.
Most arguments with specialist consultants are traceable to the email that appointed them. Something along the lines of please can you do an ecology report for this site, with a drawing attached. Six weeks later the report arrives, it does not address the policy the council will apply, the survey was done outside the right season, and the fee proposal said nothing about a second round of comments.
A written scope of works fixes almost all of this, and it takes about forty minutes to draft.
Define the deliverable and what it is for
Start with the decision the report has to support. A report written to accompany a full planning application is a different document from one written to discharge a condition, and both differ from one written to inform design.
Say which application it accompanies, which authority will read it, and which local plan policies and validation requirements it needs to address. Attach the council's validation checklist extract. Consultants who work across several authorities cannot be expected to know that yours asks for something unusual unless you tell them.
State the output format too. A signed PDF report, figures at a stated scale, a non-technical summary, and any drawing files the design team will need to coordinate with. If the council requires a specific template or proforma, name it.
Name the standard
This single line does more work than the rest of the brief combined. Every established discipline has a recognised methodology, and naming it removes any argument about whether the work was thorough enough.
| Discipline | Standard or guidance to name |
|---|---|
| Trees | BS 5837:2012 for survey, impact assessment and protection |
| Ecology scoping | CIEEM guidelines for ecological impact assessment |
| Noise from plant and industry | BS 4142:2014+A1:2019, with internal levels to BS 8233:2014 |
| Contaminated land | BS 10175:2011 for investigation, with the conceptual site model stated |
| Archaeology | The relevant Chartered Institute for Archaeologists standard and guidance |
| Landscape and visual | GLVIA3, with viewpoints agreed before work starts |
| Daylight and sunlight | The BRE site layout guidance, with the baseline approach stated |
| Overheating | CIBSE TM59 for residential assessment |
| External lighting | Institution of Lighting Professionals guidance on obtrusive light |
Where a standard offers options, say which one. GLVIA3 does not dictate a viewpoint list, so agree the viewpoints with the consultant and, where possible, with the council before the photography is booked.
Give the consultant the site information
Chasing information is the most common cause of delay, and it is usually the client's fault.
- A topographical survey with levels, in a format the consultant can use.
- The current proposed layout, dated and version numbered, with a note on how settled it is.
- Any previous reports on the site, including ones with unhelpful conclusions. Withholding these wastes money and undermines the new report if they surface later.
- Site access arrangements, including who holds keys and whether livestock, security or occupied buildings restrict access.
- Known constraints already identified, so the consultant is not paying to rediscover them.
- The programme, with the date the application is intended to be submitted.
Point three deserves emphasis. A previous ecology report that found a bat roost does not stop existing because you appointed someone else.
Assumptions, exclusions and provisional items
Ask for these explicitly in the fee proposal, then read them. A proposal with no exclusions is either unusually generous or has not been thought about.
Typical exclusions worth spotting are further survey work if the initial visit finds a protected species, intrusive investigation, attendance at committee, responses to third party objections, and any work arising from a change to the design after issue.
Price the likely ones as provisional sums rather than leaving them open. Knowing that emergence surveys would cost a stated amount, subject to the initial appraisal, lets you budget honestly rather than discovering it in April.
Review rounds and revisions
State how many rounds of comment are included, who gives them and by when. Two rounds is a normal allowance: one draft for the client team and one revision after the council's formal comments.
Also state what happens to the report if the design changes. A layout revision after a landscape assessment has been photographed and modelled means new work, and the scope should say whether that is a variation or included.
And say who owns the report and who may rely on it. Where a funder, a purchaser or a housing association will need to rely on it, ask for reliance to be addressed at appointment rather than negotiating a reliance letter during a transaction.
Programme and survey seasons
Ecology drives more programmes than anything else, and the windows are fixed by biology rather than by anyone's preference.
Bat emergence surveys run from May to September, with May to August the optimal period. Great crested newt environmental DNA sampling runs from 15 April to 30 June. Reptile surveys need April to October, with spring and early autumn the most productive. Breeding bird surveys fall between March and August. Botanical survey work needs the growing season.
Miss one and you wait a year, or you submit with a survey caveat that the council may refuse to accept. Noise surveys have their own timing rules, generally avoiding school holidays for road traffic work, and parking surveys follow the count methodology the authority specifies.
Put the survey window in the scope as a date, not a season, and ask the consultant to confirm availability against it in writing.
Fee basis and variation triggers
Fixed fee for a defined scope is the right basis for most planning reports, with named provisional items and an hourly rate schedule for anything outside it.
Name the triggers that would allow a variation. A change to the red line boundary, a change in unit numbers beyond a stated tolerance, a request from the council for work outside the agreed standard, and a delay beyond a stated date that pushes the survey into another season. Listing these does not create disputes. It prevents them.
Check professional indemnity insurance level and expiry, and confirm the individual doing the work holds the relevant membership. Where the report is one the council expects a suitably qualified author to produce, name that qualification in the scope. The related question of independence when the design team also writes the supporting documents is covered in conflicts of interest when your designer writes the reports.
Once the draft arrives, review it against this scope line by line before it goes anywhere near the council. The method for doing that is set out in reviewing a specialist report you did not commission, and the professional review route exists where an independent check is wanted.
For the narrative documents that sit alongside specialist work, PlanScope drafts to a policy structure and flags missing facts for you to fill. 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. Browse the report types to see which your project needs.
Frequently asked questions
How long should a scope of works be?
Two pages is usually enough for a single specialist report. It should name the deliverable and its purpose, the standard to be followed, the information being provided, the exclusions and provisional items, the number of review rounds, the survey window as a date, and the fee basis with variation triggers. Longer briefs rarely add value.
Should I send previous reports that reached unhelpful conclusions?
Yes. A consultant who discovers an earlier survey later will have to address it anyway, and withholding it wastes fee and damages the credibility of the new report if it surfaces during determination. Provide everything, and let the consultant advise on how the earlier findings should be presented and updated.
How many rounds of revision should a fee include?
Two is a reasonable allowance: one draft for the client team to comment on and one revision after the council's formal comments arrive. State who provides comments and by when. Also state whether a revision arising from a design change is included or treated as a variation, since that is where most disputes start.
Why does the survey season matter so much?
Ecological survey windows are set by the behaviour of the species. Bat emergence surveys run May to September, newt environmental DNA sampling from 15 April to 30 June, reptile surveys April to October and breeding bird surveys March to August. Missing a window means waiting a year or submitting with a caveat the council may reject.
What should trigger a fee variation?
A change to the red line boundary, a change in unit numbers beyond an agreed tolerance, a council request for work beyond the named standard, and a client delay that pushes a survey into the following season. Listing the triggers at appointment makes the conversation straightforward when one of them happens.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.