If you want the short answer, my best family hotel in London is Park Plaza London Westminster Bridge: a Studio that sleeps two adults and two children for about £288, a pool children can use from 8am to 8pm, and the Aquarium and the London Eye within five minutes' walk. For a museum trip, the Ampersand's Science Family Suite in South Kensington, five minutes from the Natural History Museum. On a budget, Premier Inn London County Hall, where a family room for four was £188. Still choosing a neighbourhood? Start with where to stay in London, then come back for the hotel.
These are the hotels in London for families that I'd book, grouped by what a family needs: the museum quarter, the South Bank and the big sights, hotels with a pool (with the hours children can swim), budget family rooms, and aparthotels for bigger families. Each card names the room that actually takes four, what it cost, whether cots are free and children eat free, and the walking minutes to the sights children ask for. Walks are in minutes, with a Tube (the subway) tip where the train is quicker.
Every price is for two adults and two children on Tuesday 10 November 2026, an off-peak school-term night, checked on 27 September 2026, unless a card says otherwise. They include 20 per cent VAT, London has no tourist tax yet, and they're a guide for comparing hotels, not a quote. They move a lot: the school holidays (Easter, the summer from late July to early September, Christmas and the half-term weeks) are when family rooms sell out and prices climb, so book those dates three to six months ahead.