Sun House is a Tochigi unit-house and prefab company whose public profile lists unit-house planning and manufacture, light steel building design and construction, and unit-house manufacture, sale and lease. Product pages include high-insulation units, single-room orders, connected offices and shops, small residential units, garages, warehouses, toilets and trailer houses.

It is useful for buyers needing size-flexible prefab buildings, while final use, permits, delivery and finish level should be checked project by project.