House Extensions
Bridge
Improvement: Adds a bridge which gives you access to more crop land.
Price: 10000G
Lumber: 200G
House Upgrade
Improvement: Upgrades your house
Price: 30000G
Lumber: 300G
Second House Upgrade
Improvement: Upgrades your upgraded house (hmm.)
Price: 100000G
Lumber: 900G
Sheep Barn
Improvement: Allows you to raise sheep by adding a new barn for the sheep.
Price: 70000G
Lumber: 500G
Hothouse
Improvement: Adds Greenhouse structure so you can grow flowers and herbs (which add to your photo album, by the way)
Price: 50000G
Lumber: 600G