ᐅ Flat roof on a 170 sqm area with a basement on a hillside

Created on: 28 May 2019 17:04
D
DASI90
DASI9028 May 2019 17:04
Hello everyone,

finally, we can share our initial planning stages for discussion. We are still in the conceptual phase because, for us, it was first about determining whether the plot is suitable for our ideas. Therefore, no contract has been signed yet. However, we definitely want to continue working with the architect.

The reason for the "preliminary investigation" with the architect was that the plot has a few restrictions that need to be considered in the design and might have been dealbreakers for some buyers. These are:

- The large row housing development to the west with fixed building heights of 10.5 m (35 ft) for the full floors and 13.5 m (44 ft) for the final attic floor. These heights must be strictly observed. The distance between our house edge and the row housing edge is 16 m (52 ft).
- The fact that it is a sloping plot with a 3 m (10 ft) gradient from southwest to north.

The discussion about the plot itself already took place here: https://www.hausbau-forum.de/threads/Grundstück-die-zweite-Hilfe-bei-der-Beurteilung.30148/

We concluded that we are comfortable with the purchase and the possibilities the plot offers. Compared to other plots, it has its own unique charms.

Further general remarks on the design:

  • Before discussing the design from the architect’s concept, it is important to know that the main focus was, as mentioned, to present the fundamental idea, positioning, and exterior shell. Accordingly, the room layout was secondary. So far, windows and similar details are completely missing.
  • Access to the basement is provided via the split-level in the design. However, this will definitely be solved by the main staircase. This was proposed as well.


Development Plan / Restrictions
Plot size: 502 sqm (5400 sqft)

Site plan of a building area with buildings, roads, restricted zones and markings.


Slope: Yes, sloped. Approx. 3 m (10 ft) height difference from southwest to north

Small technical floor plan diagram with dimensions and symbols such as max WH and max GH


Floor area ratio (FAR): 0.4
Plot ratio: 0.8
Building window, building line, and boundary: See excerpt from development plan (map oriented north)

Site plan of a building plot with boundaries, road layout and building lines.


Number of parking spaces: 1.5 per residential unit
Maximum possible residential units: 2
Number of floors: 2 full floors allowed, attic floor not allowed
Roof style: pitched roof and flat roof allowed
Orientation: no specifications
Maximum heights/limits: Residential building height max. 6.5 m (21 ft) and max. 10.5 m (35 ft) total building height measured from top of access road in the northeast
Further requirements: Garages/carports only allowed within the building window or the designated yellow-marked areas

Client Requirements
Style, roof type, building type: Bauhaus, flat roof -> Ideally, we want to incorporate the Bauhaus style with some authentic elements and base the concept accordingly. We can also imagine a minimalist pitched roof.
Basement, floors: Basement (KG), ground floor (EG), and upper floor (OG)
Number and age of occupants: 29 + 28 + 1 year old. It would be nice if we could be four in the future.
Room requirements, ground floor and upper floor: Together approximately +/- 170 sqm (1830 sqft) of living space
Office: We definitely need an office.
Guest sleepers per year: 3-4
Open or closed architecture: We are generally fans of open architecture.
Conservative or modern construction: modern construction
Open kitchen, kitchen island: Yes, an open kitchen with a kitchen island would be our ideal choice.
Number of dining seats: 6-12
Fireplace: No
Music/stereo wall: There should definitely be space for a 5.1 sound system.
Balcony, roof terrace: Not strictly necessary. However, we had the idea of adding a small roof terrace with filtered facade elements as privacy screens (this is reflected in our version of the room program). Inspired by the idea of a windowless house with interior courtyards in parts.
Garage, carport: Carport
Utility garden, greenhouse: No
Additional wishes:

  • Use of controlled residential ventilation
  • External blinds / shutters
  • Use of home automation system (e.g. KNX or Free@Home)


House Design
Who designed it: Concept from the architect and alternative versions of the room program from us.
What do you like most? Why? Split-level and open void space that reflect the idea of building with the terrain and having two terraces protected by pergolas with access to upper and lower levels. We also like that it is possible to walk all around the house. The open void keeps it airy and creates a continuous sightline upwards that could be closed with a skylight, for example. The volume was deliberately placed on the western edge of the building window, even though this brings it closer to the row housing, to enable a more sheltered terrace to the east. Because to the east, there are only garden plots and a narrow access road that is not intended as a main access.
What do you dislike? Why? Room layout: basically too small and difficult-to-use room arrangement. We are reluctant to give up the split-level because it carries the idea of working with the terrain and provides access to the lower and upper areas. On the other hand, it consumes space and functionality. The same applies to a potential open void above. Also, overall, the rooms are too small, especially given that there should be quite a bit of space available with 170 sqm (1830 sqft) of living area.
Price estimate according to architect/planner: No detailed cost breakdown by work stages yet. However, we provided our budget and the concept was developed based on the assessment that it was feasible.
Personal price limit for the house, including equipment: maximum $625,000
Preferred heating technology: Geothermal

If You Have to Give Up Something, on which details/extensions
-can you give up: Although reluctantly, if necessary, on controlled ventilation, home automation, and geothermal heating.
-can you not give up: External blinds, a garden on the east side as a protected area for dining and relaxing since the front street is not the main access road and should be screened accordingly with planting.

What is the Most Important/Basic Question About the Floor Plan in 130 Characters?

We obviously want honest opinions on our project to get ideas on what to consider and especially how to improve things. We currently find it difficult to judge the room sizes and layout. We are looking for ideas on how to improve without straying from the core concept.

[IMG alt="OG.jpg"]https://www.hausbau-forum.de/data/attachments/34/34245-1dba1bcffe9276a24d7771734e7f8356.jpg[/IMG]

[IMG alt="EG_KG.jpg"]https://www.hausbau-forum.de/data/attachments/34/34246-c4723bc5436c3067eb0d370cb371b16a.jpg[/IMG]

Handsketch: upper floor plan with two kids’ rooms, bathroom, corridor and staircase.


Hand-drawn floor plans of a house with CHILD/PARENTS/PLAY and surrounding site plan.


Two-story floor plan of a house with basement, living room, kitchen, dining and terrace.
11ant28 May 2019 21:36
We already included the basement garden last year with @SupaCriz. I definitely don’t see a split level here—as long as there is no half-story offset following the terrain—but rather just a multi-story living room. I also see a waste of space caused by two straight one-flight staircases, as well as a narrow townhouse positioned crosswise on the plot.
DASI90 schrieb:

Architect’s design
That’s hard for me to believe.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
DASI9028 May 2019 22:24
I already knew it would be tough from the other threads. But somehow, I would have wished for a different first post about it.

Yes, it’s not really a true split-level. We just called it that for now. I agree with you that, like with two straight staircases, it takes up a lot of space. That was also one of the things we weren’t entirely happy with, even though we wanted to stick to the basic concept.

What I don’t quite understand is the orientation of the building mass? What bothers you about it, or how would you prefer to do it differently?
I
ivenh0
28 May 2019 22:42
Two quick points:
- The kitchen is ridiculously small in comparison. At 2.80m (9 feet 2 inches) wide, a kitchen island won’t fit. It should be more like 4–5m (13–16 feet).
- The terrace should be connected to the kitchen, not the living room.
DASI9028 May 2019 22:53
ivenh0 schrieb:

Two quick points:
- The kitchen is ridiculously small in comparison. 2.80m (9 feet) wide and a kitchen island doesn’t fit. It should be more like 4–5m (13–16 feet).
- The terrace should be next to the kitchen, not the living room.

We definitely agree with point 1 and may even have a potential solution. Regarding point 2, I also agree, but currently, we’re not sure how we would implement it.
H
haydee
28 May 2019 23:19
Garden level, then it gets a small pseudo-living space

Kitchen and dining area in the garden level

Stairs stacked on top of each other

Remove the void space on the upper floor, place a proper bathroom upstairs

Possibly a proper split level

There is too much focus on design and too little on functionality here.
Mini kitchen
Mini bathroom – reminds me of the bathroom in my first 45 m² (484 sq ft) apartment