Westminster City Council reviews one of the most demanding planning caseloads in the UK, with conservation areas covering most of the borough, an extensive listed building stock, and competing pressures from residential, commercial, and hospitality redevelopment across Mayfair, Marylebone, Soho, Victoria, and Paddington. Daylight and sunlight assessments come up on most schemes that affect neighbouring habitable rooms or amenity space, with the technical scrutiny pitched higher than almost anywhere else in the country.
Our team prepares these reports under RICS regulation from our London office at Boundary Row, SE1, with BRE 209 (2022) as the working reference. For larger developments that could affect a neighbour's legal entitlement to light, rights of light assessments sit alongside the planning piece. Where works cross a shared boundary, party wall services sit alongside the daylight piece.
Using the knowledge we have gained throughout our involvement in projects of differing size and complexities, we are able to apply the criteria within the BRE guidelines and produce comprehensive reports to accompany a planning application.
When assessing daylight and sunlight, we work with a professional team to try and achieve the best outcome for a site, whilst respecting the neighbouring properties’ access to daylight and sunlight. We will also provide advice on how the design of potential residential accommodation can ensure access to good levels of daylight and sunlight.
Each Westminster report starts with the proposed scheme drawings and an initial site appraisal that grounds the analysis in the existing context. A 3D model then captures the development and the affected neighbouring properties, before running against BRE 209 (2022) methodology covering daylight, sunlight, and overshadowing as the scheme requires.
Vertical Sky Component covers light to windows. Annual Probable Sunlight Hours covers sunlight to habitable rooms with relevant orientation. Overshadowing analysis on amenity tests the 21 March sun position recommended in the guidance. No Sky Line and sunpath studies sit alongside where geometry or seasonal access matter, with conservation area context shaping how the figures are read by the case officer.
The report sets out methodology, figures, and design rationale where the numbers run below BRE 209 reference values. Typical turnaround is 2 to 3 weeks from instruction. A free initial assessment confirms scope before any fee is set. This is a bespoke surveying service shaped to each scheme.
I have worked with CHP for a number of years, obtaining advice from them with regard to daylight and sunlight. They provide exactly what our clients require and work closely with us to resolve any issues, should they arise.
- Andrew Ryley , DLBP
Westminster City Council does not require every planning submission to include a daylight and sunlight report, but most schemes that materially affect neighbouring habitable rooms, garden amenity, or shared open space will need one to defend the proposal at consultation. Mansion block streets in particular bring close-spaced neighbours, valuable existing rights, and high planning scrutiny, so the report sits in the bundle from the start rather than being chased at validation by the case officer.
BRE 209 sets reference values, not legal thresholds. Shortfalls can be justified where the conservation context supports the design, but the justification needs to be on paper. Reports are turned around in 2 to 3 weeks. The free initial assessment is the way in for borderline cases or for early advice on scope before the planning programme commits.
Get in touch.
Head Office
2-6 Boundary Row
London, SE1 8HP
Essex Office
2-6 Boundary Row
London, SE1 8HP
020 3714 4090
Get in touch.
Head Office
2-6 Boundary Row
London, SE1 8HP
Essex Office
2nd Floor, 10 High Street
Wickford, Essex
SS12 9AZ
020 3714 4090
enquiries@chpsurveyors.com
