The TW6 stock around Harmondsworth Great Barn is post-war. ONS records 42% flats, 58% houses and 3,318 households in Heathrow and Harmondsworth.
Owner-occupation runs at 41% in Heathrow and Harmondsworth, so alongside the 42% rental churn there is steady planned work — refurbishments, downsizes and probate clearances booked weeks ahead.
Heathrow and Harmondsworth substrates run to timber stud partitions inside in Heathrow and Harmondsworth, cavity brickwork outside — the reality on the streets around Harmondsworth Great Barn. Nothing is drilled until the wall has been sounded, because in TW6, a four-hole bracket with two screws in a stud and two in fresh air — measured on the walk in from Heathrow Terminals 2 & 3 (Elizabeth line, Piccadilly) rather than assumed from a map is the mistake that costs a TW6 customer twice.
Two streets can behave very differently in Heathrow and Harmondsworth: the airport itself plus the villages of Harmondsworth, Sipson and Longford beside it. The quote reflects the street the job is actually on. Heathrow and Harmondsworth is outside the Congestion Charge zone but inside ULEZ; our vehicles are compliant, so nothing is added for it.
On access, airport perimeter security, restricted vehicle zones and drop-off charges; the villages are quiet with driveways — one reason two crew travel with the load for a dedicated van; part loads are consolidated at our depot and delivered by the driver running that route. Fitters travelling in use Heathrow Terminals 2 & 3 (Elizabeth line, Piccadilly).