It seems that Brentwood College now owns the road, and I believe also the house at the end. This article mentions that foot access should remain open 24/7 and that improvements to the road/trail would be happening in 2024. I'll check it out on-the-ground the next time I'm up that way.
https://www.lakecowichangazette.com/local-news/new-gate-on-mill-bays-lashburn-road-as-brentwood-takes-ownership-7289879