On the south facing slope on the edge of the village of St. Alban the Bio-Solar-Haus Company has developed in about a. 2 ha area a building development area for 12 Bio-Solar-Houses and an outbuilding. Here you can see how reasonably-priced building land can be ecologically enhanced and a natural settlement designed. Neither concrete nor asphalt seal the ground on streets, paths and parking areas. Open spaces and roofs extensively greened and easy to care for and allow nature its species-rich design space.

Indigineous bushes, hedges and fruit trees offer birds, small game and a variety of decreasing kinds of animals protection and food.
A small, natural finish lake fed with rainwater is home to fish and amphibians. Its water is naturally cleaned with the help of a wind wheel pump through a reed filtration system and warmed by the sun.
It is also gladly used by guests and users of the houses as well as the children of the surrounding area for bathing as is the neighbouring play area.
Cleaned lake water is used for the toilets through the reed filtration system.
The waste water from the settlement is naturally cleaned in a reed bed.
Drinking water comes from the local water supply.
Electricity comes via the local grid with natural energy, PV- plants feed as much electric into the grid as the settlement requires.
To heat the houses, the free greenhouse effect of sunlight is used and a tiny amount of wood.
An inn ensures well-being for larger groups of visitors
The Sonnenpark and its building are largely energy self-sufficient.
There is no danger to the environment from it.