create a realistic architectural visualisation based exactly on this rear elevation drawing strict spatial rules single storey rear extension only extension projects 1 46 metres beyond the original rear wall the projection must appear modest and shallow the extension ridge height is lower than the main house eaves maintain the existing first floor exactly as drawn do not alter chimney positions or roofline maintain exact window and door proportions architectural style traditional uk london stock brick with natural tonal variation subtle red brick lintels and banding to match existing dark grey slate roof tiles to extension gable black aluminium bi fold doors black fascia soffits and rainwater goods realistic mortar colour and brick coursing slightly overcast british daylight design clarity the extension must read as a small sympathetic addition preserve correct wall thickness preserve original house massing keep the gable proportion exactly as drawn do not redesign or modernise beyond the drawing
