Harringay (N4) is 6 minutes south-west of my base and typically 13 to 23 minutes door-to-door, one of my faster response windows outside the immediate Tottenham postcode. Green Lanes is the main artery through the area, with Wightman Road running parallel to the west and the Ladder streets (Seymour, Hewitt and the rest) threading between them. Endymion Road carries traffic over toward Finsbury Park. Outside rush, the shorter end of that range is the norm, evening peak through Green Lanes can push closer to 23.
The Ladder is the defining feature of the housing stock, a tight grid of Edwardian terraces, almost all now broken into flats during conversion waves over the last forty or fifty years. There are 1960s infill blocks dropped into the grid in places, and small pockets of family-sized terraces still in single occupation, but the overwhelming majority of front doors I see in N4 are shared communal entrances feeding two, three or four flats above. The locks tend to be the original Edwardian mortice paired with a much-newer Yale night latch, plus a Euro cylinder on the communal-entrance setups.
The most frequent call here is the communal-entrance cylinder. With multiple residents, deliveries, and constant footfall, the cam wears, the key starts sticking, eventually it won’t turn. A 3 star anti-snap replacement is the right call. Renter-turnover rekeys come second, the Ladder has a high concentration of letting-agent flats, and a fresh cylinder between tenants is the cleanest landlord-friendly fix. On the original Edwardian doors that remain in single occupation, night-latch servicing dominates, the spring weakens with age, the latch starts grabbing reluctantly, and the lock needs cleaning rather than replacing.