Lottery winners spend their money on hot tubs, walk-in wardrobes and pet dogs, a survey by National Lottery operator Camelot has found.
About half of winners move within three months of a big win and a poll of new millionaires found almost a third (29%) splashed out on a hot tub and a similar number (28%) had a walk-in wardrobe.
Nearly a quarter (24%) had electric gates at their new home, one in five (22%) set up a games room and 17% bought a snooker table. Just over a fifth (22%) bought a dog while one in 25 (4%) got a cat.
Some 16% adopted a healthy lifestyle with a gym in their home and about one in 10 (12%) installed a bar to have drinks to celebrate their good fortune.
One millionaire admitted having three pianos in their house and another said they bought a wishing well.
About one in 10 (9%) said their new house had a river or lake in the grounds. Surprisingly, less than a third (30%) said they employed a cleaner to keep their new home tidy.
A special EuroMillions Millionaire Raffle draw will guarantee 18 new millionaires in the UK on Friday.
A National Lottery spokesman said: "With 18 new millionaires guaranteed to be made this Friday, everyone will be discussing their dream house. It seems that when planning your spending, any millionaire needs to factor in the essentials - a giant wardrobe, a hot tub, a cleaner and, of course, a dog.
"This draw will be a special night for 18 lucky ticket-holders, who will all become a millionaire overnight."
Friday's estimated EuroMillions jackpot is £51 million.