ᐅ Floor plan for a new single-family house, 1.5 stories, 148 m² (approximately 1,593 sq ft)

Development Plan / Restrictions
Plot size: 766m² (width at the street 20.5m (67 feet))/ No. 28, drawing oriented to the north
Slope: none
Site coverage ratio: 0.4
Floor area ratio: II
Building envelope, building line and boundary
Edge development: no
Number of parking spaces: 2
Number of stories: 1.5 or 2
Roof type: gable or hip roof
Architectural style: modern
Orientation:
Maximum heights/limits: ridge height 9.5m (31 feet), eaves height 6.5m (21 feet)
Additional requirements: rainwater infiltration on site

Homeowner Requirements
Architectural style, roof type, building type: 1.5 stories with minimum 1.60m (5 feet 3 inches) knee wall or urban villa
Basement, floors: no basement, 1.5-2 floors
Number of occupants, ages: 2 adults aged 27 and 33, 1 child planned
Space requirements ground floor, upper floor: about 75m² (800 sq ft) each
Office: family use
Guest overnight stays per year: 10
Open or closed layout: open living-dining area preferred
Conservative or modern construction: modern
Open kitchen, cooking island: yes, preferred but not mandatory
Number of dining seats: 6-8 (daily need is 4 seats)
Fireplace: no
Music/sound wall: no
Balcony or roof terrace: no
Garage, carport: 1 garage with annex, 1 carport
Kitchen garden, greenhouse: no
Further wishes/special features/daily routine, also explanations why certain things are desired or not: none

House Design
Planner: combination of builder and self-designed
What do you particularly like? Why? We are very satisfied with the upper floor, especially regarding the room layout and sizes. An L-shape for the living-dining area on the ground floor is preferred.
What do you dislike? Why? I am still uncertain about the ground floor because the study is also intended as a guest room; it seems a bit small for that purpose, although a 1.40m (55 inch) pull-out couch would likely fit.
Cost estimate according to architect/planner: 275,000
Personal budget limit for the house, including equipment: 300,000
Preferred heating technology: air-to-water heat pump or ground-source heat pump

If you had to give up something, on which details/upgrades
- could you do without:
- could you not do without: staircase not directly at the front door, ground floor shower

Why is the design as it is now? For example:
We have visited many model homes and construction companies, sought advice, and usually returned to a floor plan like this because we wanted an additional guest/office room on the ground floor. We saw the upper floor almost exactly as drawn in a model home and only enlarged the bathroom slightly and shifted the dressing room a little.

So, I hope I’ve filled in the most important details first. I am open to any changes; as mentioned, the L-shape in the living-dining area should be maintained.
What still concerns me somewhat is the placement of the possible outdoor unit for the air-to-water heat pump, which according to the development plan must be at least 10m (33 feet) from the nearest neighbor; with the current plan it would be directly in front of the house or beside the carport.
After a long selection process and several offers, we are currently favoring Gussek Haus, Helma, and Elbe-Haus, which could realize the house roughly within the budget. The tendency currently leans towards Gussek Haus because although it is a prefab house, we like the hybrid wall and the clinker brick exterior well, and the price-performance ratio fits. But nothing is decided yet; the plot will be developed at the beginning of next year and construction will start from summer 2021.