Behanllp Chartered Surveyors
Telephone: 01727 800075

Envelope Modelling


Example showing the potential maximum building envelope for a proposed site that does not impact on neighbouring rights of light and / or daylight and sunlight.


Example model showing a proposed development where there rights of light and daylight and sunlight requirements are not fully met. The magenta coloured areas show the areas of ‘cut back’ required to ensure scheme is compliant. This technique is used in development gain exercises for rights of light calculations.


This image reflects the ‘cut back’ area loss zones on plan as a result of the exercise undertaken in image 2.


RICS Guidance Note “Daylighting and Sunlighting”
Mark Behan is a member of the working group that produced this guidance note. This guidance note provides advice to surveyors who accept instructions to advise on daylight, sunlight and shadow calculations for developments. It explains the different types of assessment available, reporting procedures and the roles that the Chartered Surveyor will need to perform.