Variation (under Section 73a) of Condition17 (approved plans) to substitute those plans approved under 20/03397 for the Part single/part two storey side/rear extension to include rear Juliet balcony, 1 No. first floor side window, replacement/alterations of the roof incorporating 1 No. rear dormer and rooflights, front gable extension and alterations to fenestration including a bay window, increase in height of existing chimney and new front boundary treatment to include pillars and railings. with amended plans.