Extension and refurbishment of a listed house in North London. This project involves the replacement of an existing rear extension with a classical composition inspired by the Choragic Monument of Thrasyllus, which has inspired architects for centuries. Its apparent symmetry is subverted by the split section behind, with a new garden room behind the left and centre bays, a green terrazzo lined shower room behind the upper sash of the right hand bay, and a map room behind the lower bay, partly below ground level. The façade is topped by two bespoke cast lead planters. The garden room has a shallow tent-like ceiling which emphasises the centrality of the doric pilaster between the large openings, which is day-lit from above. The new fountain at the far end of the courtyard garden is visible through the French doors. This incorporates a stone basin, two further water tanks and planters. The front coal vaults will be excavated and converted into a study and library with a projecting window onto the lightwell. Lowermost of the rooms will be a new wine cellar, with a concrete vaulted ceiling, brick floor and concrete shelving.