The VSC calculations were carried out, and it was shown the the proposed building did not cause more than the recommended 20% reduction in VSC at assessed windows.
Sunlight Daylight Assessment Cornwall
The report was to check impacts on an existing property. SWEL used the well established (and normally applied) BR209 assessment method to derive VSC and Daylight Values for neighboring windows.
All was found to be well and good. And the design was considering applicable given the context of sunlight and daylight.
The proposed building was 3 stories in height and was set back approximately 20 meters from the existing building which was though worst affected. The worst affected window experienced a 12% drop in day light, with the guide allowing for 20%.
ADF Daylight Assessment – Lambeth SW4
The design of the project was most unusual. It consisted of a dwelling being built in a gap in a row of terraced houses. Instead of using the full available height to match the existing houses, the development makes use of a basement and a ground floor level only. As such is fairly unique in appearance certainly when considering the immediate vicinity.
|Basement & Ground Floor Only Design
This low level construction obviously aided in the minimisation of any day lighting or sun lighting issues, and the dwelling met all criteria relating to external impacts as described in BR209. Interior lighting was found to be excellent throughout with ADF values exceeding guide minimum values by some margin.
SWEL regulatory carry out Sunlight and Daylight Assessments across the Greater London Area. Our reports are well received and we pride our selves on a quick turnaround, often in 5 working days or less.
The above image is reproduced courtesy of Tekton Design & Build SW18.
Sunlight and Daylight Assessment – Lambeth SW16
|Sky Angel has a Strong Effect on ADF Values
Sunlight & Daylight Assessment – Epsom
Acting on instruction from a repeat client in the Epsom area, Southwest Environmental Limited are undertaking a Sunlight and Daylight Assessment for a prestige development of 2 no. 6 bedroom houses, which occupy the plot of a single smaller dwelling.
The scheme makes very good use of the space available, but unfortunately in the first instance the height of the buildings was a little too great, as it caused loss of daylight to a neighbouring kitchen window that was beyond the loss allowable under BRE 209.
Recommendations were made that involved altering the pitch of the roof, and allowing for a flat roof area, where it would not impact of the character of the property. This reduced overshadowing to the point where, the scheme became acceptable.
The reduction in height did not result in any loss of usable internal space, although it did result in some loss of loft space, which may have been suitable for conversion in the future.
The original plan was for the building to have 5 stories with an extra penthouse single unit on the fitth floor. This was a problematic layout owing to there being very little over shadowing pre-development.
Southwest Environmental were able to inform our client of the maximum possible building height based on the bRE 209 reduction criteria which was around 12 meters in this instance. Th height would change dependent of the scale and distance of the building in relationship to the affected window.
After redcuing the building height to 4 stories the calculations were acceptable, and the rpeort was issued in support of the application.
This report may be used in the appeal process to prove that 4 stories does not create adverse overshadowing conditions.
The Sunlight Daylight study has been carried out in accordance with the recommendations of the Building Research Establishment Report “Site Layout Planning for Daylight & Sunlight 1991”. This is the standard adopted by a wide range of District and Borough Councils across the UK.
The scheme was already sympathetically design by the architects in question when plans were forwarded to SWEL for assessment.
Calculations were carried out to assess impacts. The scheme showed at worst VSC and Sunlight at 84% of their former value and as such the reports recommendation as that the scheme was allowed to proceed.
Sunlight & Daylight Assessment – Hackney
SWEl have just sucessfull completed a sunlight & daylight assessment for an unusual retrofit project in Cazenove (Hackney) London.
The project invloves the install of a further two stories on top of an existing building the design is modern and well considered to reduce daylighting impacts, with a tiered design with width decreasing upwards.
The surrounding buildings were subject to considerable overshadowing prior to the development, and as such only minimal reductions in enjoyed light were acceptable.
Sunlight & Daylight reduction post project were within limits set in the relavent guidance, and as such the project with minor alterations was recommended to proceed.