@Edward Skira , I don't think the new fence really means anything,... it just replaced "temporary" metal construction fencing that was up on most of the site off & on for about 10 years - prone to falling & trespassing.
Answering your post from almost 2 years ago,... as you would recall, there used to be a small plaza with convenience store & little HomeHardware store at this northeast corner of Finch Ave West & Grantbrook Ave - demolished around 2009?
Around 2010, the original Anndale Properties (developer) agreed with City to have land remain vacant until Finch LRT westward of Yonge is built (Transit City) - but then City only proceeding with Finch West LRT westward of Finch West Station at Keele which does NOT involve this site. A future Finch LRT between Yonge & Keele isn't on the official plan yet, but will likely raise to the top once all the other LRT projects in planning now are completed (15-20 year time frame).
Prior to all this, the old man who owns the adjacent 172 Finch West (white wooden cottage-like house in photo earlier in thread) felt he was being harassed to sell by the developer/land-assembler, so he "petitioned" to have his property designated a Heritage Property to protect it!!! Search "Arthur Waine House".
After the old man passed away, his kids cashed out and sold the 172 Finch West property to the Anndale Properties (developer) who proceeded with their 6-storey proposal - refused at City but granted at OMB in 2015. But developer never proceeded with construction; basically, just up-zone at OMB to flip,... to what appears to be another land-assembler/investor (when I dug around last year - I recall the name "Lake" something registered in Markham - likely Asian investors),... maybe sold again?
If 172 Finch West was granted Heritage designation, then the frontage of the house would need to be preserved - but since it's a small structure, it'll likely be moved elsewhere as part of any redevelopment of this entire site. NOTE: City Council never finalized the Heritage designation for 172 Finch West,.... so it's really being used now as a Trump-Card by the City to ensure developer proposal fit within the City's Official Plan for the site! Otherwise, City would slap it with a Historical Designation - thus complicating development proposal & increasing cost to developer!
Over the years, the entire site have been left abandon - the clearing of overgrowth & fencing off of 172 Finch West that you cited 2 years ago was really an attempt to kick out squatters. The more permanent fencing now seems to be their latest attempt to stop dumping, trespassing & squatters.