Green/sustainable House design - must have experience in design of earthy, unique, green houses/buildings

Looking for a freelancer that can help with the exterior design of a 4 bedroom house. Must be someone creative and that has a passion for green building design. The house is for an eco estate and we are looking for earthy home designs. Its a project of 39 houses and interior design is also on the cards if I find a freelancer with the same vision as what we have.

Here is a pinterest link for design reference.

https://pin.it/5vuvLrW