The Lassie House in Pomona

This historic, rebuilt and restored home will be dedicated in the afternoon of July 1, 2018, so you still have time to rework your schedule. The address is 1195 Washington Blvd in Pomona.

It IS a lovely house -- all that river rock and the craftsman touches. 7000 square feet, 8 bathrooms and 8 bedrooms (huge, huh?) and built in 1900.
It's owned by Ray Adamyk, who heads Spectra Company and owns the YMCA of Pomona, which he's also restoring. 
Why is this called the Lassie House? 

It's because of Timmy. If you remember the Lassie TV series, Timmy was played by Jon Provost from 1957 1950s to 1964. As the Facebook page spells out, this was Jon Provost's home once.
At the right is the house in 2008; clearly, lots of work has been done. In fact, older online MLS listings say it had five bathrooms and six bedrooms, and much less square footage. 
When Timmy joined the Lassie cast in 1957, the Provosts had to go to a neighbor's to watch it -- they didn't own a TV yet. (Although Lassie had debuted in 1954, different actors played Lassie's family. In 1954, the cast changed and Lassie became Timmy's dog.

According to Provost's own website, the checked shirt and bluejeans he always wore in the TV show (one set of them, anyway) is in the Smithsonian, next to Archie Bunker's chair.
Back in the 1950s,Provost's father was an aerospace engineer at the Convair Division of General Dynamics. The family moved into this home when Jon was four, and moved out to Beverly Hills when he was nine -- after only two years on the TV show. . (People Magazine says Jon and his Mom moved; Dad and siblings stayed in Pomona.)
By then Jon Provost was Timmy Martin to everyone in American ... Let's face it, he's still Timmy Martin to all of us. His role ended in 1964, but the Lassie show continued, with different stars and scenarios, until 1973, nearly 20 years.