The 32-year-old star - who announced her split from the cage fighter earlier this month ending weeks of speculation their marriage was in trouble – wants to get rid of the property and is planning to move to a secret country location.
Since their separation, Alex, 35, has briefly stayed at his parents' home in Aldershot, Hampshire, but is refusing to move out of the Surrey mansion he shared with the ex-glamour model and her children Harvey, eight, Junior, five, and three-year-old Princess Tiaamii.
The estranged couple have been living in different parts of the property.
Katie has instructed her estate agent to sell the home as soon as possible and in the meantime she intends to avoid her cross-dressing husband as much as she can before moving into a £2 million house in West Sussex.
A source told the Daily Mirror newspaper: “Alex doesn’t look to be going anywhere fast.
“Kate has contacted Hamptons International and told them to step-up all efforts to sell the marital home. Until then, she will stick it out in separate quarters to Alex. It is all very awkward.
“The secret country house she bought last year is not ready to move into yet. Her step-dad’s been working hard on it, her riding partner, Andrew Gould, is using the stables and builders are working around the clock. Once she moves in, Alex cannot follow.”