The company breaks its offerings into four distinct tiers, from a more stringent set of options to more flexible customizations.  Photo 7 of 8 in Solar Arrays and Good Insulation Make These Prefab Residences Net-Zero—Even in Cold Climates

Solar Arrays and Good Insulation Make These Prefab Residences Net-Zero—Even in Cold Climates

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The company breaks its offerings into four distinct tiers, from a fixed set of options to more flexible ones.