Walk Holloway from The Emirates Stadium and Nag's Head market outwards and the mainly Victorian pattern is obvious: 89% of the 8,936 households in N7 live in flats, 11% in houses.
Owner-occupation runs at 29% in Holloway, so alongside the 40% rental churn there is steady planned work — refurbishments, downsizes and probate clearances booked weeks ahead.
Holloway substrates run to often with surface conduit — and precast concrete panels and dense blockwork — which is what a 89% flat share across the ONS neighbourhood covering Holloway actually produces. Nothing is drilled until the wall has been sounded, because drilling blind into a panel with reinforcement or a buried cable behind it on these streets — the pattern behind 8,936 households inside the N7 neighbourhood is the mistake that costs a N7 customer twice.
Two streets can behave very differently in Holloway: a busy road of shops and student halls, with quieter Victorian streets either side. The quote reflects the street the job is actually on. Holloway sits inside the Congestion Charge zone as well as ULEZ, so both are itemised on the quote rather than absorbed into an hourly rate.
On access, holloway Road is a red route; side streets are permit-only with tight corners — one reason one technician for a standard garden patio or deck; two for a roof terrace or balcony where water has to be carried up by bowser and furniture moved through a lift or stairwell. Fitters travelling in use Holloway Road (Piccadilly).