This design encompasses all of the things I am looking for, but like anything, there is certainly room for improvement. Like the previous design, I believe the floor space of this house is about 5500 sq ft.

Note the special feature of this house, which is also mentioned in the title. "The greencube", essentially this is a 2 storey greenhouse that is half inside and half outside the house. I think this is a really cool design feature.

This design used the previous design, "House Design 3" and built upon it, changed some things, and took away some unnecessary features.

The image below shows the main floor and exterior features layout.

The image below shows the upper level floorplan.

The 3d rendering below shows the courtyard and details the opposite side of "The Greencube". Much like house design 3, the courtyard features a pool, spa, and covered arbor for seating on hot summer, or rainy days.

The dining area, which affords a beautiful view of the courtyard and backyard through massive glass windows.

A 3d rendering of the master bathroom. Note the continuous counter top connecting the vanity counter and the bathtub deck. Stairs made of matching wood will lead up to the bath tub. Another interesting feature is the ledge stone brick wall that accommodates the tub filler. This same wall, ideally, will be exposed on the shower side and provide shelving area for shower accessories/products, hiding them from view from anyone not actually in the shower. The shower itself is 10' wide, and has shower heads on both ends.

A view showing the kitchen, living room and part of the green cube.

"The Greencube". As the name suggests, this is a greenhouse. The unique thing about this design element is that it actually is half inside and half outside the house. Allowing the plants residing inside to get the maximum amount of light all year round. The greencube has double glass doors to the inside of the house so it can easily be accessed and enjoyed year round. A small concrete patio inside is ideal for relaxing and is large enough to accommodate a bistro set.
A feature not shown, but one that would be implemented is a waterfall faucet on the top of the first level of the greenhouse, that spills into a pool carved into the concrete floor, creating a unique water feature.

The 3d rendering below shows the modern, but minimalist kitchen. Essentially a galley style kitchen, one long row of cabinets and uppers, and one long island. Of course, the latest stainless steel appliances, induction cook top etc will be featured. Dining is to the left of the kitchen (not shown in this view)

Another view from the loft level, opposite fireplace side.

The photo below is a view from the loft (fireplace side). The fireplace actually starts on the main floor, and reaches the ceiling. At the loft level, an additional gas fireplace and TV are mounted on the opposite side.

The photo below shows the master suite complete with a slate covered fireplace.

A 3D rendering detailing the rear of the house and external garage.