The typical home sells for about £485,000, though hardly anyone pays that exact figure. Flats go for about £325,000. Terraces cost about £577,000. Semis reach about £693,000. The middle figure is an average of two different markets that share a postcode.
The Land Registry recorded 259 sales in Isleworth in the year to May 2026, at a median of £485,000. Prices split sharply by type. The 111 flats that sold went for a median of about £325,000. The 82 terraces fetched about £577,000 and the 60 semis about £693,000. Only six detached houses sold, at a median of about £818,000. Six sales is too few to say much about the price. It mostly tells you how seldom anyone in Isleworth gives up a detached house.
Prices have dipped slightly. The Land Registry's house price index for the area recorded a 2% fall in the average price over the year to May 2026, to about £501,000. Flats fell further, by about 5%. Over five years the index is up about 5%, and the latest month showed a small rise. None of that is dramatic. It does mean that a flat bought a year ago would now sell for a little less than the price paid, which leaves some room to negotiate.
Council tax is most often band D, and only 8% of homes are in bands A or B. Hounslow charges about £2,190 a year for band D. At these prices there are almost no cheap bands to hide in. Expect to pay at least band D, and more if you buy a semi.
Renting is priced across the whole borough. The Office for National Statistics puts typical private rent across the London Borough of Hounslow at about £1,920 a month as of April 2026, up 3% on a year earlier. That figure is a mean from the Office for National Statistics' rent index, not a median of advertised lets. By size, a one-bed averages about £1,560 a month, a two-bed about £1,920, a three-bed about £2,200 and a four-bed or larger about £3,040. There are no studio or room figures to give. A flat overlooking Isleworth's river frontage is folded into the same average as everything else in the borough. Ask a letting agent for recent lets on the street itself.
The Office for National Statistics models gross household income in the area, before tax, at about £84,000 for the financial year to March 2023. That's a modelled average for the area, three years old. A household on that income can reach a flat without much strain. A terrace or a semi needs a large deposit, a second salary well above average, or equity from a previous home. Isleworth is affordable for people who already own somewhere.
For the sales that could be matched to an energy certificate's floor area, about 71% of the year's total, the median price was about £6,250 a square metre. The typical home behind that figure has about 89 square metres of floor space. That's a family-sized footprint at a London price, and you are paying mostly for the floor space, with the garden extra.
The 2021 Census shows what the homes contain. About 17% of households have one bedroom, 32% two, 31% three and 20% four or more. Two- and three-bedroom homes make up most of the market, and that's where the competition is. The four-bedroom fifth is what keeps the semi median at about £693,000.
Overall, Isleworth is middling on price. Flats are a reasonable way into a riverside London town. Houses are priced for buyers who arrive with equity from a previous home.