Objecting to Loss of Natural Light and Overshadowing 

Using years of council experience, we specialise in objecting to developments that block natural light, ensuring your habitable rooms and gardens remain bright, usable, and compliant with national sunlight standards.

In planning terms, “Loss of Light” is split into two categories: Daylight (the amount of diffuse light entering a window) and Sunlight (direct sunshine).

Councils typically use the BRE (Building Research Establishment) Guidelines to decide if a loss of light is “significant.” A common technical test we use is the 45-Degree Rule, where a line is drawn from the centre of your window to see if a new extension “breaks” that line. If it does, the impact is usually considered unacceptable.

• Loss of Daylight to Habitable Rooms: Protecting your primary living spaces (kitchens, living rooms, bedrooms) from becoming gloomier.
• Overshadowing of Private Gardens: If a new structure casts a shadow over more than 50% of your garden for most of the day, it is often a breach of policy.
• The ‘Right to Light’ vs. Planning: While “Right to Light” is a civil matter, we focus on the Planning Amenity aspect to ensure the council refuses the application before it even gets to a legal dispute.
• Impact on Solar Panels: If a neighbour’s extension shadows your existing solar array, we can argue the loss of renewable energy efficiency.

A simple photo isn’t enough to stop a developer. At Objection Experts, we provide the technical weight needed to win:

1. 45-Degree & 25-Degree Tests: We apply these standard planning tools to the developer’s drawings to show the exact point of breach.
2. Vertical Sky Component (VSC) Analysis: We use the same language as Planning Officers to describe how much “sky visibility” your windows will lose.
3. Policy Citations: We cite specific Local Plan policies regarding “Overshadowing and Dominance” to ensure your objection is grounded in law.