Who is competent to write a GLVIA3 landscape assessment

There is no statutory qualification for writing a landscape and visual impact assessment. What there is instead is a professional expectation, set by the third edition of the Guidelines for Landscape and Visual Impact Assessment, that the work is done by someone competent in the method and willing to show their reasoning. In practice that means a chartered member of the Landscape Institute, or someone working under one, and councils on contested rural schemes will say so in their validation correspondence. Landscape assessment competence under GLVIA3 is judged by the transparency of the judgements, not by the length of the document.

What GLVIA3 expects of an assessor

The guidelines are guidance, not a standard with pass marks. They set out a structure and then insist repeatedly that professional judgement is applied and explained.

That framing has consequences for who can do the work. An assessor has to understand landscape character assessment, be able to read a landscape as a resource rather than as scenery, and be capable of defending a judgement about sensitivity or magnitude in cross-examination. Someone who can produce a photomontage cannot necessarily do that.

The guidelines also warn against mechanical use of matrices. Multiplying a sensitivity score by a magnitude score to generate an effect rating, with no narrative explaining why, is the pattern inspectors criticise most often. Where an assessment reaches conclusions by arithmetic, the author has substituted a table for the judgement the method requires.

Chartered membership and how people get there

The Landscape Institute is the chartered body for landscape practice in the United Kingdom. Chartered membership is the qualification most councils look for on an assessment of any consequence.

The route runs through an accredited degree or a recognised equivalent, then a period of monitored professional experience under a mentor, then an examination. The process takes a minimum of two years after qualification for most candidates and rather longer in practice. Before chartership, candidates hold a lower grade of membership and should be working under supervision.

Two qualifications on that point. First, landscape architecture covers design, management and science, and a designer who spends their time on streets and squares is not automatically an assessor. Ask what proportion of the individual's recent work has been assessment, and ask for two examples that went to appeal.

Second, an ecological or landscape survey has a shelf life, and so does the baseline in an assessment. A report written for a previous application on the same site is a starting point, not a submission.

Landscape effects and visual effects are different things

The single commonest error in submitted assessments is treating them as one exercise.

Landscape effects are effects on the landscape as a resource: its character, its constituent elements, hedgerows, field patterns, watercourses, the quality and condition of the whole. They occur whether or not anybody can see the site.

Visual effects are effects on specific views and on the visual amenity of people. They require a receptor, a viewpoint and a route or property from which the view is had.

Screening removes a visual effect. It does not remove the loss of a hedgerow or the erosion of a field pattern, and an assessment that concludes no landscape effect because planting will hide the development has confused the two.

Viewpoints, photography and visualisations

Agree the viewpoint schedule with the authority before doing the fieldwork. On a scheme of any size that is a scoping conversation, and the cost of repeating photography because the officer wanted a viewpoint from the churchyard is entirely avoidable.

Viewpoints fall into three working categories: representative ones standing for a group of receptors, specific ones covering a particular property or designated view, and illustrative ones chosen to demonstrate a particular effect. Say which is which in the schedule.

The Landscape Institute publishes technical guidance on visual representation which sets out photographic method, projection types and levels of visualisation. Follow it and say you have. A montage produced at the wrong focal length or projected inconsistently invites an argument about the image rather than about the development.

Timing matters on deciduous landscapes. Winter photography with leaves off shows the least screened condition and is usually the fair test, while summer photography shows the condition for much of the year. On a contested scheme, provide both and say which you regard as the worst case. Photography in flat white light is close to useless, and repeat visits are part of the budget.

Where an assessment gets dismissed as advocacy

Inspectors do not reject assessments for reaching favourable conclusions. They reject them for reaching conclusions without showing the working.

The tells are consistent. Sensitivity described as low for every receptor without reference to the receptor's occupation or the designation status of the landscape. Magnitude reduced because mitigation planting will mature, without assessing the effect at year one. Significance conclusions that appear only in a table. No adverse residual effects at all, on a scheme that inserts new built form into open countryside.

An honest assessment records residual adverse effects and then leaves the planning balance to the planning statement. That division of labour is what makes the landscape evidence credible, and a Landscape and Visual Impact Assessment that argues the case for permission has stopped being evidence.

Urban schemes raise the same competence question in a different form. Where the issue is the setting of buildings and streets rather than open landscape, a Townscape and Visual Impact Assessment is the right document, and the relevant experience is different again.

Briefing the work

Ask for four things before appointing.

Confirmation of the individual who will sign the assessment and their membership grade, not just the practice's credentials. A method statement naming the character assessments that will form the baseline. A draft viewpoint schedule for discussion with the authority. And a clear statement of what is excluded, because heritage setting, arboriculture and ecology are separate disciplines that often get quietly absorbed into a landscape brief.

The wider question of what "competent" means across different report types is worth reading alongside this, since the term carries different weight in different legislation. For landscape work it is a professional expectation rather than a legal one, which makes the brief you write the main control you have.

Find a reviewer in the PlanScope professional directory if you need a chartered professional to review a draft before it is submitted.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. Councils usually expect a suitably qualified author for landscape and visual assessment, 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.