Taylor Swift and her British actor lover Joe Alwyn are getting serious. She’s now looking to spend up to $30 million on a new London love nest for the pair, Page Six is exclusively told. On Friday, Swift, 29, released a new song titled “Lover,” which has been described as a gushing love letter to handsome Alwyn, 28, and their three-year romance.

A source close to the singer told Page Six: “Taylor is looking for a grand home in London with two kitchens, so she and Joe can live in privacy and entertain properly. They’ve been splitting their time between [his native] London and [her home in] Nashville — and she keeps sending her jet for him so they can be together. She has three private jets and even her own hangar.”

The source added of Swift blissfully turning her back on her tumultuous past love life, “This is just another sign of how close they are. She’s the happiest she’s ever been.”

Alwyn, who comes from a middle-class family in Crouch End, North London, starred in the film “The Favourite.” He and Swift have been spending more time in England and were recently spotted cozying up at the Spaniards Inn pub, on the edge of posh Hampstead Heath.

“Lover” features wedding vow-style lyrics, such as, “Ladies and gentlemen / Will you please stand / With every guitar string scar on my hand / I take this magnetic force of a man / To be my lover.” She sings, “I’ve loved you three summers now, honey . . . My heart’s been borrowed / And yours has been blue / All’s well that ends well / To end up with you.”

It’s not the first time Swift has bought a home to be closer to a boyfriend. In August 2012, she purchased a colossal $4.9 million, seven-bedroom oceanfront mansion in Cape Cod next to the Kennedy compound, where her then-love interest Conor Kennedy summers with his family. But they had only been dating for two months and broke up that October. She put the place on the market and sold it for a heart-healing profit at $5.7 million.

Her rep didn’t get back to us.