Lighting - Daylight/Sunlight and Overshadowing Assessment

 

Our trained lighting team understand the need to achieve optimal levels of daylight and sunlight within dwellings to support planning applications. We use the latest technologies to give feedback on designs at all stages of the design process. We are strategic in our approach, achieving the best outcome whilst keeping project costs reasonable.

 

As land supply runs low in towns, cities and urban environments, the desire for housing requires building upwards; this is where issues of daylight, sunlight and overshadowing mainly come into effect.  We can help with any project, from building an extension on a residential property or a new dwelling at the end of a garden to implementing a large multi-storey carpark in an inner-city development.

M-EC daylighting team are here on hand and can help with multiple stages of the planning process. Whether it’s an extension to a single-storey property or a multi-storey building, when thinking of designing a project, it’s important to highlight any daylight, sunlight or overshadowing issues early on in the design. M-EC can help produce constraints reports for the site based upon potential daylight, sunlight or overshadowing impacts surrounding the site and give build limits on the extent of buildings to comply with national and local planning guidance on daylight. 

We can undertake a staged approach to assess the proposed property's internal daylight and sunlight levels per BRE Guidance and British Standard EN 17037. 

Using either Sketchup or Waldrum tools for Autocad software allows us to produce a 3d model of the proposed development and surrounding existing buildings by undertaking the following assessment;

  • A 25-degree and 45-degree assessment of adjacent windows 
  • No Skyline (NSL) Assessment. 
  • Daylight Factor (ADF) Assessment (Proposed Rooms).
  • BRE Annual Probable Sunlight Hours (ASPH) Annual and Winter. 
  • Sunlight Exposure. 
  • Existing and Proposed Private Amenity Space Overshadowing Assessment  


Proposed Internal daylight and sunlight levels. – As part of the Permitted development rights, offices can now be converted to residential properties easier without a planning application; however, there is a clause of “adequate Natural light in all habitable rooms. Therefore daylighting and sunlight levels should be considered when going through this application. M-EC can help to produce internal daylight and sunlight assessments for proposed properties by creating a 3d model of the development and its surroundings and assessing internal daylight levels against national and local guidance, including the latest BRE guidance.  
 
 

 

Case Studies

 

DRAFT

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For more information about our lighting impact assessments, contact:


  Nathan Allen

  Nathan.Allen@m-ec.co.uk

  01530 264753