It's a pine timber retaining wall to keep your fence leveled with adjacent lot. You need to check with your neighbour whether they are interested in having this timber sleeper underneath, because you will share cost with your neighbor unless it is a corner block.
Thank you, we'll be sharing our fence with 4 neighbours:
1 on left side
1 on rear
2 on right side (the properties back on to the side of ours)(one of them fell through so Willowdale own it again, they're still trying to sell it after 10 months)
It's probably going be a pain getting an agreement and payment from everyone, especially Willowdale for the vacant lot...
Hello, I'm your neighbour next to you (lot 4031). Happy to discuss fencing cost