The Sawmill The Sawmill has three functions in Build-a-Lot:

  1. It reduces the prices of materials by 50%
  2. It speeds up the delivery of materials
  3. Allows players to purchase building "permits" that allow players to upgrade houses to 4-star houses. A Sawmill "costs" 900 materials and five workers to build.

There is no benefit provided for having multiple sawmills