In Old Street (EC1V) the split is 98% flats to 2% houses over 4,949 households, and the stock is post-war.
The social-housing-led mix here (19% owned, 28% privately rented) means a EC1V diary swings between short-notice tenancy deadlines and appointments set a fortnight out.
Old Street substrates run to precast concrete panels and dense blockwork; locally that also means often with surface conduit, the pattern behind 4,949 households inside the EC1V neighbourhood. Nothing is drilled until the wall has been sounded, because Old Street gives us drilling blind into a panel with reinforcement or a buried cable behind it, which is what a 98% flat share across the ONS neighbourhood covering Old Street actually produces is the mistake that costs a EC1V customer twice.
Old Street sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate. What shapes the job more is the neighbourhood itself — the roundabout, tech offices and warehouse conversions on the City fringe — which is why a EC1V quote is not a Islington average.
On access, red-route roundabout with no kerbside loading, goods-lift booking in the towers and gated estate yards — one reason one person and a car for boot-loads; two crew and a 3.5-tonne Luton for anything from a quarter-load upward. Fitters travelling in use Old Street (Northern, Great Northern).