The 'Story of My Life' hitmaker is said to have decided to see his new girlfriend at her father Bruce's 5 million pound clifftop mansion.
"Kendall was really keen to make Harry's birthday a memorable one. Her dad Bruce owns an incredible clifftop holiday home in California which has amazing views.
"The secluded house is perfect for them to spend some quality time together. It's also ideal for a party with Kendall's sisters," a source said.
The One Direction singer, who is expected to celebrate his birthday again in London later this month, is allegedly dating Jenner after a string of other high-profile celebrity flings.