Kylie Jenner was spotted earlier this week on a building site in the Hidden Hills of Los Angeles.
It's now being reported that she's building a mansion on the site.
According to TMZ, the mum-to-be is set to house her first child in a decadent mansion, with building permits suggesting the value of the job to be over 2.37 million dollars.
Check out the video of her on site here.
The house is set to have two floors, two garages and a space for a cabana for the pool.