What professional review and sign-off costs

Professional review of a planning report is priced against liability rather than against reading time. A reviewer who signs a document is putting their professional indemnity cover behind its conclusions, and that is what you are buying. So the useful question is not what an hour of review costs. It is whether the report you have is a document a professional can review at all, or one they would have to write from scratch after doing their own fieldwork.

That distinction decides the price more than anything else, and for several report types the honest answer is that review is not available.

Why some reports need a named professional at all

Three things put a name on a report. Legislation can require it, as with an environmental statement prepared by competent experts. A licence regime can require it, as with survey work on protected species. Or the local planning authority's own expectation can require it, as with an acoustic assessment or an arboricultural report where an officer will not accept an unqualified author.

Report types fall into three groups, and the review market is different in each:

• Legally required professional authorship: environmental impact assessment, protected species survey, biodiversity net gain metric work, land contamination investigation, fire statements and fire strategies.
• Professional expected in practice: noise, air quality, arboriculture, transport, viability, daylight and sunlight, overheating, archaeology.
• No professional requirement: planning statements, design and access statements, community involvement statements, most waste and construction management documents.

Review of a draft compared with full authorship

Reviewing a draft costs less than writing one from scratch only where the underlying evidence already exists and is sound. A reviewer reads the data, tests the reasoning, corrects the policy references and puts their name to the conclusions.

Where there is no data, there is nothing to review. An ecologist cannot sign a Protected Species Survey for a site they have never visited in a season they cannot recover, because the survey is the fieldwork rather than the document. The same is true of a contamination report without boreholes and a noise assessment without measurements.

The practical test is simple. If the report's conclusions rest on site-specific measurements, a reviewer has to either repeat them or decline. If they rest on policy interpretation, published data and design judgement, a reviewer can work from a draft.

What the reviewer is taking responsibility for

A signature is a professional statement that the work meets the standard of the discipline. It exposes the reviewer to a claim from the client, and potentially to others who rely on it through a reliance letter, for as long as the limitation period runs.

That is why reviewers price defensively on unfamiliar drafts. A well structured draft with clear data provenance, a stated methodology and no gaps takes a fraction of the time of one where the reviewer has to reconstruct where each number came from. The saving from a good draft is real and it is in your hands.

It is also why some reviewers will not touch a draft they did not commission. Their insurer may require it, or their institute's code may make the independence position awkward. Ask at the outset rather than after the draft is finished.

Professional indemnity and how it shapes the fee

Indemnity cover is priced by discipline and by the value at risk. Disciplines with a history of claims carry higher premiums, and the premium is recovered across the fees charged that year.

Two effects follow. Review fees do not scale down indefinitely with the size of the job, because a small report on a large development carries the same exposure as a long one. And a reviewer will usually want the scheme value or the development context described before quoting, which is not commercial curiosity. It is how the risk is assessed.

Where a funder or a warranty provider needs reliance, expect the fee to rise again, because extending the duty of care to third parties extends the exposure.

Reports where review is not an option

Several report types cannot be signed off on the basis of an AI-assisted or third party draft, and PlanScope labels them honestly for that reason:

1. Environmental Impact Assessment, where the EIA Regulations 2017 require the environmental statement to be prepared by competent experts.
2. Protected species survey work and any mitigation licence, which need a suitably licensed ecologist under the Wildlife and Countryside Act 1981 and the Conservation of Habitats and Species Regulations 2017.
3. The statutory biodiversity metric, which the Environment Act 2021 regime expects to be completed by a competent person, with the Biodiversity Net Gain Assessment and gain plan then approved by the authority.
4. Land contamination investigation, where the intrusive work and its interpretation must be carried out by suitably qualified and experienced persons.
5. Fire statements and fire strategies, which need demonstrable fire engineering competence.

For these, a draft is useful as a scoping document and a structure. It is not a document a professional can adopt.

Preparing a draft that reduces review time

The things that make review quick are boring and effective.

State the source of every figure in the text rather than in a separate appendix. Use the current policy references, with the edition named, because a reviewer who finds one stale citation will check every other one. Remove the placeholders. Include the raw data as supplied rather than as retyped. And write the conclusions as conclusions, so the reviewer is agreeing or disagreeing with a position rather than inferring one.

A draft that arrives with three unanswered questions in it takes longer to review than a shorter draft that answers them.

There is one exception to all of this, and it is worth saying plainly. A reviewer who disagrees with the conclusion will not sign a better written version of it. If the daylight numbers do not meet the benchmark, no amount of drafting quality changes that, and the value of an early review is finding out before the drawings are finished rather than after.

Budgeting review into the programme

Treat review as a scheduled activity with a lead time, not as a final check. Reviewers book up, and the ones worth having book up further ahead.

Build in the round trip. A first review normally produces comments, the draft is revised, and the reviewer reads it again before signing. Two weeks is a reasonable allowance for a straightforward document with a reviewer already appointed, and longer where fieldwork is involved or where the reviewer has to visit the site.

Where several reports go to different reviewers, sequence them. An acoustic reviewer who needs the layout fixed cannot work in parallel with a designer still moving the plant enclosure, and running both at once produces two sets of comments that contradict each other.

Drafting costs are the part you can fix in advance. PlanScope pricing is a flat £50 per report, or £150 per month on the Professional tier for unlimited reports, and the review and sign-off flow runs through the professional directory with statuses from sent through to signed off. Where ground investigation is involved, the cost structure is different again, and our note on budgeting a contaminated land investigation sets out where the money actually goes.

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. For specialist technical reports, qualified professional input may be required.