BRE Daylight, Sunlight and Overshadowing Assessments

Impact Assessments and Internal Assessments

Daylight and Sunlight Assessment Reports are more commonly being required for planning applications in areas where buildings are situated close to one another and developments have the potential to affect levels of light to existing building or have restricted light themselves.

Hawkins Environmental have considerable experience in daylight and sunlight impact assessments, according to the Building Research Establishment (BRE) Report 209, “Site layout planning for daylight and sunlight – a guide to good practice” by PJ Littlefair. The BRE Guidelines is accepted methodology for assessing daylight and sunlight and is highly complex. Hawkins have experience in conducting both hand calculations using the Waldram Diagrams, suitable for extensions and small developments, as well as computerized calculations for larger developments. In addition, we can calculate Average Daylight Factors, Vertical Sky Components, or whatever parameter is required to achieve our client’s goals.

Hawkins can offer a range of services to assist the developer and architect. They include:

  • Daylight & Sunlight impact assessments for planning applications
  • Overshadowing assessments of outdoor amenity space
  • Daylight calculations for basements and other developments with limited lighting
  • Internal daylight assessments for Class O Permitted Developments
  • Impact & internal assessments for upward extension Permitted Developments
  • Development potential
  • Maximum building envelope assessments
  • Daylight distribution analysis

Contact Us

For more information, or to get a quotation, please use the form below:

Sunlight Air Quality Vibration
Daylight Dust Acoustics
Odour Shadowing Noise

Hawkins Environmental Limited

Based in Basingstoke in Hampshire, we are perfectly positioned for servicing projects and clients in London, the Southeast and Nationwide.


The Square
Basing View
RG21 4EB