Environment Statement - Shading Analysis

A shading analysis was required as part of the planning application for this new development pictured near the centre of the images shown. The planners needed to be confident that the development did not adversely effect the existing buildings and that the development itself would receive adequate daylight in the residential areas.

The effect of shading from the proposed development is simulated by visualising the computer-generated shading patterns on three identified days (Winter and Summer solstice 21 December and 21 June and the spring equinox 21 March) at 0800, 1200, 1500, and 1800hrs. The plotted plan images are then be analysed against the guidance of BRE Handbook 'Site Layout Planning for Daylight and Sunlight' (1991).

The effect of overshadowing on existing buildings is most apparent at the winter solstice, when the effect of the proposed development to the South reduces the majority of sunlight hours falling on the South elevation of terraces to the north of the development  To the East the existing buildings continue to enjoy a relatively high level of sunlight hours over 75% of the day.

At the other simulated times, all existing buildings enjoy high levels of exposure to sunlight and therefore daylight. The exception to this was found to be overshadowing in the late afternoon to properties immediately adjacent to the eastern boundary. This occured for 33% of the simulated time in the spring equinox, reducing to 10% of the simulated time during the summer solstice.

Private courtyards and other areas of activity within the proposed development also receive high levels of daylight and good exposure to sunlight throughout the year with the majority of overshadowing from the tower falling within the site boundary or within transient areas of people movement.  Areas of seating and entrances retain a variable appearance throughout the seasons with exposure to good daylighting and sunlight hours at varying times of the day and year due to the permeable plan form and orientation.

HOME