A listed house in the Cottage Orné style, set within the Highgate Conservation Area, whose character has been shaped by nearly two centuries of incremental alteration — a history that gives the house its charm, but has also left behind awkward junctions, compromised spaces, and ageing environmental performance. Our proposals offer a coherent strategy in place of that pattern of piecemeal intervention: internal reconfigurations to resolve longstanding layout deficiencies, a lightweight contemporary rear extension creating a new garden-facing dining room, and a comprehensive environmental upgrade transitioning the building to low-carbon heating.