Daylight & Sunlight Assessment FAQs

Answers to the questions we are asked most often. If yours isn't here, call 01962 809155 or email info@sunlightassessments.co.uk.

Do I need a daylight and sunlight assessment?

Assessments are often requested where a proposed development could affect the daylight or sunlight received by neighbouring properties, where new homes are being created and internal daylight levels need to be demonstrated, or for certain permitted development applications such as Class MA commercial-to-residential conversions. If you send us your plans, we can usually advise quickly which type of assessment, if any, is likely to be required.

How much does an assessment cost?

Every report is a fixed fee. A single-storey extension affecting one neighbour's windows and garden starts from £499 + VAT. Larger schemes are priced on the number of neighbouring properties and units. You can get an instant price online in about two minutes.

How quickly can you complete a report?

Most daylight and sunlight assessments are completed within 5 working days of receiving the drawings. If you have a planning deadline, we can often accommodate urgent requests.

Do you need to visit the site?

In most cases, no. We can usually complete the assessment using architectural drawings, photos provided by the client, site plans, Google Earth and publicly available information.

What information do you need to get started?

We typically require architectural drawings, a site plan and details of the proposed development. If available, a 3D model can help speed up the assessment, but it is not essential.

At what stage should I involve you?

The earlier, the better. Involving us during the design stage allows potential daylight and sunlight issues to be identified before a planning application is submitted, often saving time, redesign costs and delays.

What happens if the assessment does not meet the BRE guidelines?

Not meeting a BRE guideline does not automatically mean planning permission will be refused. We review the results in context and, where possible, recommend design changes or provide supporting commentary to help strengthen the planning case.

Do you do internal daylight reports for new homes and Class MA conversions?

Yes. We assess daylight and sunlight inside proposed homes against BS EN 17037 and the 2022 BRE guidelines (BR 209), including the natural light assessments needed for Class MA prior approval applications.

Which standards do you assess against?

Neighbour impact reports follow the BRE guide Site layout planning for daylight and sunlight (BR 209, 2022 edition): Vertical Sky Component, No Sky Line, Annual Probable Sunlight Hours and garden sunlight. Internal reports use BS EN 17037. Read our plain-English guide to the BRE guidelines.

Can I see a sample report?

Yes. Our sample reports page shows neighbour impact and internal daylight reports so you can see exactly what you will receive.

Do you cover my area?

We work across the whole of the UK. Because assessments are prepared from drawings, photographs and 3D modelling, location does not affect turnaround.

How do I get a quote?

Use the instant price calculator, send your plans through our contact page, or call 01962 809155.