Ever-reliable real estate yenta Yolanda Yakketyyak swears on a mile-high stack of crisp $100 bills that it was software heiress-turned-young-gun super-producer Megan Ellison who quietly and via corporate entity dropped $5.25 million on a slickly renovated house in the Mount Olympus neighborhood, high above Hollywood.

Listing details show the boxy and low-profile, two-story residence has five bedrooms and six bathrooms in 5,240 square feet. Meticulously and expensively finished open-concept living spaces feature wide expanses of electronically operated sliding glass doors, walnut-paneled walls, a Brazilian-marble staircase, a cutting-edge home-automation scheme and a state-of-the-art security system equipped with surveillance cameras. Most rooms open to deep, glass-railed balconies with toe-curling canyon and city-lights views, and set below the house, a large deck offers ample sunbathing space and a small, dark-bottomed pool and spa.

The 0.62-acre property sits directly adjacent to the eight-plus-acre, multi-parcel estate the 29-year-old Ellison bought in several transactions in late 2013 that totaled $30 million. It might seem folly for her to drop another $5 million on the house next door, but wacky are the real-estate ways of the super-rich and, this isn’t the first time young and prodigiously moneyed Miss Ellison has owned neighboring multimillion-dollar residences in Los Angeles; between February 2008 and February 2011, she shelled out a combined $32.6 million for three bluff-edge dwellings in the much-coveted Bird Streets ’hood above the Sunset Strip, which sold over the summer and fall of 2013 for a total of $46.75 million — quite a tidy profit.

Ellison, whose father’s all-but-unfathomable fortune is estimated at well above $50 billion, also maintains a pied-a-terre in lower Manhattan: an architecturally idiosyncratic and luxuriously fitted one-bedroom and one-bath penthouse in a storied Beaux-Arts building with a circular and skylit rotunda-roofed living room that she picked up in May 2013 for $2.8 million.

The property was last listed by Josh and Matt Altman at Douglas Elliman.

listing photos: Hilton & Hyland (via Zillow)