Mansion tax spat: what can you buy for just under £2m? Sunningdale, Berkshire This modern mansion has been priced for a quick sale at just under £2m. The house next door recently sold for £2.4m, so it could be a bit of a bargain. The house was built eight years ago and has five bedrooms, plus accommodation for your no doubt many staff. £1.995m, Aston Mead (01344 209000).