The 40-year-old star is house hunting in Los Angeles with her boyfriend, Martin Kristen, and the pair are looking for a ''family home'' which will provide Heidi's four children: Leni, nine, Henry, seven, Johan, six, and Lou, three.
The couple - who got together last year in the wake of Heidi's split from husband Seal - are said to be keen on Katy's house because all of the children's bedrooms are on the same floor as the master bedroom.
According to website TMZ.com Heidi was impressed with the seven bedroom, 11 bathroom estate in Hollywood Hills.
Katy purchased the mansion in 2011 with then-husband Russell Brand, and they had plans to renovate it before moving in, which sadly never came to fruition before they split in December of the same year.
The 'Firework' star recently reduced the asking price to $6.5 million in a bid to sell the home.
The property was built in 1912 and boasts a pool with a waterfall, a garden, a carriage house and two guest suites.
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