Understanding daylight requirements in Bracknell Forest is essential for anyone planning a house extension, infill development or larger residential scheme in this Berkshire borough. As a unitary authority, Bracknell Forest Council acts as the local planning authority for the whole area, so it is the council's own adopted policies and guidance that determine how daylight, sunlight and residential amenity are assessed. This guide sets out the local policy position and explains how nationally recognised technical standards are applied here.
Daylight requirements in Bracknell Forest: the local policy framework
The principal development plan document is the Bracknell Forest Local Plan, which was adopted on 19 March 2024 and runs to 2037. It replaced much of the previous suite of saved policies and now provides the up-to-date framework against which planning applications are determined, alongside any remaining saved policies in the development plan and relevant supplementary guidance.
Two policies are particularly relevant to daylight and sunlight:
- Policy LP18 (Design) sets the borough's overarching design expectations. Among its criteria, it requires development to provide acceptable standards of amenity space, privacy and daylight, and to avoid adversely affecting the amenity of the locality or of surrounding properties. This is the policy hook most commonly engaged when a neighbour raises concerns about loss of light or overshadowing.
- Policy LP19 (Tall Buildings) deals specifically with taller development. It requires detailed information on the sunlight and shadowing impacts of a new building on the surrounding environment and on neighbouring buildings, and confirms that the council looks to current best-practice guidance when assessing those impacts.
Both policies operate within the wider context of the National Planning Policy Framework (NPPF), which expects new development to achieve a high standard of amenity for existing and future occupants while supporting efficient use of land.
What technical guidance does Bracknell Forest use?
Bracknell Forest does not impose a bespoke set of numerical daylight targets that differ from the national approach. Instead, the council relies on established industry guidance. The Local Plan's tall buildings policy expressly directs assessment to the BRE publication Site layout planning for daylight and sunlight: a guide to good practice together with the British Standard for daylighting (the policy text references BS 8206-2, the predecessor now superseded in practice by BS EN 17037).
In current professional practice this means a daylight and sunlight assessment in Bracknell Forest will typically be carried out to the latest edition of the BRE guide, BRE BR 209 (2022), with the relevant daylight provision standards drawn from BS EN 17037. The familiar BRE tests still apply: the Vertical Sky Component (VSC) and No Sky Line / Daylight Distribution checks for daylight to neighbouring windows, the Annual Probable Sunlight Hours (APSH) test for sunlight, and shadow or sun-on-ground studies for amenity areas and gardens.
The Design SPD and householder schemes
For smaller proposals, the council's Design Supplementary Planning Document (adopted in 2017) provides practical guidance on design principles, including householder extensions. It helps applicants understand how the council interprets its design and amenity expectations on matters such as the scale, siting and relationship of extensions to neighbouring homes. While the SPD is guidance rather than a set of fixed daylight metrics, proposals that respect the established BRE good-practice approach to separation distances and overshadowing are far more likely to be found acceptable under Policy LP18.
The new town context
Bracknell is one of the post-war new towns, designated in 1949, and much of the borough's residential fabric reflects mid-20th-century planned layouts with generous spacing, mature tree cover and significant areas of woodland and heathland. This matters for daylight assessments in two ways. First, the relatively open grain of many residential areas means that proportionate, well-designed extensions can often be accommodated without unacceptable harm. Second, the borough's extensive tree canopy and the town's ongoing regeneration around the redeveloped town centre mean that overshadowing, outlook and the relationship between taller buildings and existing homes are recurring considerations, which is precisely why Policy LP19 calls for detailed sunlight and shadowing studies for tall buildings.
When is a daylight and sunlight report needed?
There is no single trigger, but a report is commonly required or advisable where:
- a two-storey or rear extension sits close to a shared boundary and could affect a neighbour's windows or garden;
- a proposal introduces additional height or massing in an established residential street;
- a flatted or higher-density scheme is proposed, where the daylight and sunlight received by the new homes themselves must also be demonstrated; or
- the council, a neighbour or a planning officer raises a specific amenity objection during consultation.
A clear, BRE-compliant assessment submitted with the application can resolve objections early and give officers the technical evidence they need to apply Policies LP18 and LP19 with confidence.
How Fortress Associates can help
Fortress Associates prepares our daylight and sunlight report service to the BRE BR 209 (2022) methodology and BS EN 17037, tailored to the policies that apply in Bracknell Forest. We work nationwide with a typical turnaround of four to five working days and ask for no advance payment. If you also need supporting drawings, we produce Building Regulations drawings to the relevant Approved Documents. To discuss a specific site, please get in touch.
Related reading
If your project is on the south coast, you may also find our guide to daylight requirements in Brighton and Hove useful, as that authority takes a notably more detailed urban-design approach.
Sources & further reading
Need help with a UK planning project?
Fixed-fee daylight reports and Building Regulations drawings — delivered in 4–5 working days. No advance payment.
Request a free quote