Home Extensions are a game feature in Harvest Moon 64.
The player may purchase extensions from Gensan, the head carpenter, in exchange for money and lumber. These extensions often serve a useful purpose for the player and make managing the farm and inventory easier. Building all of the extension results in a photo being added to the photo album and contributes to the evaluation at the end of the game.
Kitchen[]
- Cost: 5000G, 450 Lumber
The kitchen contains the recipe book of the recipes collected, a poster showing the Power Nuts collected, and a refrigerator for storing food. It is also required to get married. After marriage, it will be used to celebrate birthdays (player's, wife's, and child's) and the player and wife's anniversary.
Bathroom[]
- Cost: 3000G, 300 Lumber
The bathroom contains a hot tub and a toilet. Each can be used once a day to restore fatigue and prevent sickness.
Stairway[]
- Cost: 2000G, 250 Lumber
It leads to the roof of the house.
Greenhouse[]
- Cost: 30000G, 580 Lumber
The greenhouse is arguably the best extension to can get. It allows the player to grow any plant at any time of the year (they all become available for purchase at Flower Lillia, minus strawberries which become available in Winter), without having to worry about it dying when the seasons change, or wasting time during the day. The only downside to it is that it can be destroyed in a typhoon, which will cause the player to have to pay again to get another built. The greenhouse takes about five days after requesting it to be built.
Log-terrace[]
- Cost: 7000G, 350 Lumber
The log-terrace is a patio that is built behind the house. Sometimes, the player and their wife will use it to view fireworks. Other than that, it serves no purpose, but the characters that the player makes friends with will gather on it during the evaluation by the player's father.
Baby Bed[]
- Cost: 1000G, 150 Lumber
The baby bed is required for being able to get the player's wife pregnant. Once it is built, it will appear at the foot of the bed. When the baby is born, he will sleep here throughout his entire life.
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