Reasonably well, as long as you have a car or a home office. There are stations, but hardly anyone takes the train to work. Buses run often. Broadband is close to universal. Sunbury is well connected if you drive, and it's a town most people have stopped commuting from every day.
Sunbury Rail Station, Kempton Park Rail Station and Upper Halliford Rail Station are all in or next to the town. At the 2021 census, only about 3% of working residents took the train to work and about 4% took the bus. There are 118 bus stops in the area. Sunbury is officially outside London, yet according to its Wikipedia entry most of its bus routes are run by Transport for London.
Driving is the most common way to get to work, at about 44%, and working from home is close behind at about 38%. Walking accounts for about 4% and cycling about 2%. About 44% of households have two or more cars, and about 14% have none. Those two kinds of household live on the same streets and see the town very differently.
According to the Department for Transport's modelled journey times, the nearest town centre is about 11 minutes away by car, 16 by bike, 20 by public transport and 35 on foot. The figures are averages for the area, calculated in 2019. A 35-minute walk means that, for most residents, getting to town involves a car or a bus.
The same statistics cover everyday trips. A GP is about 9 minutes by car, 14 by public transport or 17 on foot. A food shop is about 8 minutes' walk or 7 by car. The nearest hospital is about 20 minutes by car and about 40 by public transport. A centre of employment is about 12 minutes by car or 18 by public transport. These are modelled averages, and how far away each place is won't change. The public transport times, though, date from 2019, and some bus services have been cut since, so they're the least reliable of the set. Anyone without a car who needs regular hospital visits should plan around the 40-minute figure, or something longer.
The buses themselves are better than those commuting figures suggest. Across the 90 stops with timetable data, each stop averages about 161 departures on a weekday and nearly 10 an hour at peak. About 80% of stops have some weekend service. That's a regular bus network, even if only one commuter in 25 uses it to get to work.
Gigabit broadband reaches about 94% of premises, and superfast reaches about 99%. No premises fall below the universal service minimum. Every postcode has 4G or 5G from at least one operator, and every postcode has coverage from all of them. With nearly four in ten residents working from home, that broadband coverage matters as much as the trains do.
Road noise is the catch. Every postcode in Sunbury is near a stretch of road mapped at or above 65 decibels, the level at which official noise mapping treats road traffic as significant, and the loudest band reaches 75 decibels. Rail noise is a separate issue and much smaller, with about 7% of postcodes near the 65-decibel level and none above it. These maps can't say how loud any particular house will be, so visit at rush hour with the windows open.
Sunbury has 14 public charge points for electric vehicles, with 30 connectors between them, and only one is a rapid charger. For now, owners of electric cars who live here will mostly charge at home or plan ahead. Topping up while doing the shopping won't usually work.
Sunbury is better connected than average. It's very easy by car, has good buses and broadband, but anyone hoping to take the train to work will find few neighbours doing the same.