Full list of all 10 Townscaper achievements worth 1,000 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox One.
Built a garden.
Built all the way to the sky.
Built a lighthouse.
Built a house with a spire on top.
Decorated a garden with a sculpture.
Built a Hook.
Built a church door.
Built a floating town supported by propellers.
Placed 100 blocks.
Placed 1000 blocks.