This varies enormously depending on what college you choose. In Peterhouse, the majority of first years live in a single terrace of Georgian houses, which makes it very easy to socialise and feel at home. There can be anything from 5 to 15 students in a house, depending on its size and whether rooms are taken up by Fellows or staff. The houses are at least 200 years old and very beautiful (each room has a period fireplace), though of course they suffer from that age as well. Furnishings are modern but somewhat aged, though it doesn't affect their functionality (usually). In my house there were 13 people sharing 4 toilets, 2 showers, 1 bath and 3 kitchen rooms, which, if divided well, works perfectly fine. Ensuites are available at a higher cost in a different, more modern building. The prices vary from 600 to 1300 a term (the latter is for ensuites), a term being 8 weeks. First years don't choose their room unlike other years, instead they choose a price category depending on how much they want to pay and a room is randomly allocated to them out of this category. In the larger houses, it is very easy to socialise since there are big landings where you can gather. The houses are cleaned by 'bedders' (Cambridge term for a cleaner), who cleans the bathrooms/showers/kitchens roughly once a day and takes out bins every other day (this can vary). Some hoover, most don't, there is generally a hoover available for students to do it themselves. The size of rooms depends on the price, ranging from tiny to cavernous, but even the tiniest are habitable and most are perfectly spacious. All accommodation is catered (student have to pay a Kitchen Fixed Price (currently 160) and eat a certain amount of meals in hall to avoid a fine) and the only way to cook for yourself is via microwave - there are no hobs or ovens, only a kettle, toaster, and the aforementioned microwave. Food in hall is pretty cheap, though it would definitely be cheaper to cook for yourself.