It is said that some portion of his building is made in such a way that they can be used for filming these advertisements.
The building that is being built behind Mannat has Shahrukh's personal office, his gym where he works out, home for his security and staff is also made there. But the top two floors and the terrace are used for letting out to companies to film their commercials.
This has made life easy for SRK because when his kids are home he can spend a lot of time with them, they can watch their dad film for various commercials and he gets lots of time to spend with his family. Gauri Khan, his wife, too drops in from time to time to be with him. Various companies like Dish TV and Airtel have shot for their advertisements from SRK's Mannat.