In Morden (SM4) the split is 25% flats to 75% houses over 6,284 households, and the stock is inter-war.
Because 25% of Morden is privately rented and 12% socially rented, a lot of SM4 work is agreed with a landlord or managing agent rather than the person opening the door.
Morden substrates run to cavity brickwork outside — and timber stud partitions inside, the pattern behind 6,284 households inside the SM4 neighbourhood. Nothing is drilled until the wall has been sounded, because a four-hole bracket with two screws in a stud and two in fresh air, as the Morden stock goes, the reality on the streets around Morden Hall Park is the mistake that costs a SM4 customer twice.
Morden is outside the Congestion Charge zone but inside ULEZ; our vehicles are compliant, so nothing is added for it. What shapes the job more is the neighbourhood itself — the southern end of the Northern line, with Morden Hall Park's water meadows — which is why a SM4 quote is not a Merton average.
Getting to the door matters as much as the job: wide roads with driveways; the station gyratory is busy with short loading bays. Morden (Northern) is the nearest station, and one technician with a portable extraction machine and air mover on a single household booking; two technicians on HMO, student accommodation and serviced-apartment rounds where six or more mattresses are cleaned in a day.