In Liverpool Street (EC2) the split is 98% flats to 2% houses over 4,914 households, and the stock is period conversion.
Because 48% of Liverpool Street is privately rented and 15% socially rented, a lot of EC2 work is agreed with a landlord or managing agent rather than the person opening the door.
Liverpool Street substrates run to dot-and-dab plasterboard over blockwork in EC2, with metal stud partitions between rooms, which is why City of London Corporation kerb rules get settled before the van is loaded. Nothing is drilled until the wall has been sounded, because short screws that grip only the board and slowly lever it off the dabs, as the Liverpool Street stock goes, the reality on the streets around Broadgate Circle is the mistake that costs a EC2 customer twice.
Liverpool 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 — commuter gateway with Broadgate offices on one side and Spitalfields market on the other — which is why a EC2 quote is not a City of London average.
On access, broadgate estate has its own access rules and booked bays; surrounding streets are red-route controlled — one reason one fitter for standard windows; two for bent bay tracks or full-height stairwell blinds. Fitters travelling in use Liverpool Street (Central, Circle, Elizabeth line, National Rail).