Loft conversion

14 Keystone Crescent, London, N1

Internal alterations and refurbishment works, together with external works including the installation of four period-appropriate windows to the rear elevation, excavation beneath the front garden parking area to provide cycle storage, replacement of the front entrance steps with period-appropriate stone, repair of the roof and replacement of synthetic slates with natural Welsh slate, installation of a rear dormer window at attic level (or a conservation rooflight as an alternative), removal of the rear air-conditioning condenser unit, and replacement of the soil stack and rainwater downpipes.