As mentioned in the Statement of Significance for our Heritage Revitalization Agreement (HRA) with the District of Maple Ridge (DMR), Hammond was incorporated as Port Hammond Junction in 1883.
By 1912 it looked like this:

We’re always learning more, but I do know that John Hammond’s home is still standing (although the people who moved in recently, I’m told, were unaware of its history or even that it was listed on the Heritage Registry!)
The home of John’s younger brother, William Hammond, on Ealing Street and Westfield, is no more. These were the men who went to New Westminster to submit the plan for the town.
I don’t know if William’s house was ever registered as a heritage asset, but it seems its significance could not protect it from progress.