The WC1 stock around Lincoln's Inn Fields is post-war. ONS records 95% flats, 5% houses and 3,090 households in Holborn.
Owner-occupation runs at 18% in Holborn, so alongside the 30% rental churn there is steady planned work — refurbishments, downsizes and probate clearances booked weeks ahead.
Walls are precast concrete panels and dense blockwork in WC1, often with surface conduit — with 51% social-rented stock locally, block access is agreed with the estate office first, so the fixing that matters in Holborn is chosen on site — the usual failure here is in WC1, drilling blind into a panel with reinforcement or a buried cable behind it — measured on the walk in from Holborn (Central, Piccadilly) rather than assumed from a map.
Two streets can behave very differently in Holborn: legal London — the Inns of Court, Lincoln's Inn Fields and Sicilian Avenue. The quote reflects the street the job is actually on. Holborn 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, inns of Court gate access, weekday loading windows and listed staircases — one reason two operatives as standard, one in the loft and one on the ladder and ground floor, which is how a loft clear stays safe rather than a one-person job with a rope and a prayer. Fitters travelling in use Holborn (Central, Piccadilly).