Here is the full list of all 25 Demolish & Build 2018 achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Build a concrete house
Build metal garages
Build a hotel
Buy a tower crane
Build a metal hangar
Sell 50 tons of scrap
Buy a skid loader
Buy a big bulldozer
Build a brick house
Buy a crawler crane
Build a recreational plot
Buy a backhoe loader
Sell 10 tons of scrap
Build a wooden house
Buy an excavator
Sell 2 tons of scrap
Buy a dump truck
Buy a road roller
Get your first mine working
Buy a cargo truck
Buy a demolition robot
Build a parking
It's a dirty job but someone has to do it
Buy a bulldozer
You never liked it anyway