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Do you need an Daylight, Sunlight and Overshadowing (DSO) Assessment to support your planning application? 


Will your development receive sufficient levels of natural light?

All sensitive developments need to ensure that future site users have enough access to natural light without the need for additional electric lighting. 


Is your development sensitive to changes in natural light?

Any land use where people can be expected to spend any significant period of time can be considered sensitive to changes in natural light. 

Daylight, sunlight and Overshadowing Assessment


Will your development restrict natural light at neighbouring buildings?

New buildings could restrict existing levels of daylight and sunlight at existing buildings surrounding your development. New buildings could also overshadow nearby amenity areas such as gardens and play areas. 

You could need an Daylight, Overshadowing and Overshadowing Assessment to support your planning application if your development could Expose future site users, Impact the local area, or is Sensitive to changes in natural light.

Speak with one of our Lighting Consultants to discuss what's best for your development.


To ensure your development doesn't block natural light to the surrounding area, a Daylight, Sunlight and Overshadowing Assessment will be needed to support your Planning Application

Our Services Include:

  • Daylight Assessment: "Daylight" covers the ambient light a building receives during the day. If a building doesn't receive enough ambient light, there will be a higher reliance on electric lighting, increasing the buildings carbon footprint.

  • Sunlight Assessment: "Sunlight" covers direct light from the sun. Reducing the hours of sunlight reaching a building will increase the necessity for other forms of heating such as boilers or electric heaters.

  • Overshadowing Assessment: "Overshadowing" covers the usability of outdoor space based on its access to sunlight. New developments can overshadow surrounding outdoor space, reducing its usability. 

Get in touch with one of our expert lighting consultants for your initial advice and free, no obligation quote. 

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