ᐅ Layout of a Single-Family Home on a Small Trapezoidal Plot

Created on: 17 Jan 2024 21:21
Z
Zauberwald
Hello everyone,
I need your experience on the best way to position a house measuring 8.4 x 10.4 m (27.6 x 34.1 ft) on a trapezoidal plot of land to maximize usable garden space, while avoiding an excessively long driveway.

Development Plan/Restrictions
Plot size: 665 m² (7,157 sq ft)
Slope: slight, facing northwest
Floor area ratio: 2, no basement
Building window, building line, and boundary: see plan
Building layout:
The longer upper side is about 30 m (98.4 ft) long
The shorter lower side is about 16 m (52.5 ft) long
The left side is 28 m (91.9 ft)
The right side is 30 m (98.4 ft)
The plot is marked in yellow on the overview map, where the cardinal directions can also be seen.

The blue box marks the building window – it’s quite large. Roof ridge orientation does not matter. However, the setback distance of 3 m (9.8 ft) for the house must be respected. The garage and storage can be placed anywhere. The driveway access must be from the lower street.

Site plan of the development and landscape plan WA at Zauberwald, Annex 4, parcels and road network.


Floor area ratio: 0.35
Edge development: no
Number of parking spaces: 2
Carport for 2 cars instead of a garage
Storage with 20 m² (215 sq ft)
Orientation: that’s the question!

Architectural site plan with red buildings, green trees, lines and dimensions.
Z
Zauberwald
18 Jan 2024 15:35
Thank you for calculating the slope—I wouldn’t have figured out how to do that myself. But is 8% considered steep? How should I interpret that? Will building the house become significantly more expensive than expected? What additional factors should I consider regarding house placement with an 8% slope? When you’re on site, it doesn’t really feel like a hillside lot….

Compared to other municipalities around here, the development plan is very flexible. In other areas, not only are the roof shape and pitch strictly specified, but also which plants (from a selection of fewer than 30 species) you are allowed or required to plant. The building envelopes are exactly the same size as their example house….
H
hanghaus2023
18 Jan 2024 15:57
Are there no specifications for building heights? Reference points? Benchmark heights?

The 8% means that you have more than 1 meter (3.3 feet) of height difference inside the house.

You can take your phone and measure the slope. That works quite accurately.
H
hanghaus2023
18 Jan 2024 16:04
What do you prefer? A garden and terrace facing south? Why not share your ideal floor plan?
H
hanghaus2023
18 Jan 2024 16:10
Is the plot already yours?

Rotate the house to increase solar panel yield?

Is a basement planned?
11ant18 Jan 2024 16:45
As of November 28, 2023 (1st amendment of the development plan), the floor area ratio/site coverage ratio has been adjusted from 0.3/0.6 to 0.4/0.8, and now to 0.35/0.7. The reference height is always the original terrain.

(3.3.1) The original terrain must be preserved as much as possible. Changes to the terrain should be limited to the absolutely necessary extent.
Maximum cut/fill on the plots is 1.25 m (4.1 ft).
These must be arranged within the boundaries of the respective property to ensure that the original terrain at the neighboring property lines is not significantly altered.
(3.3.3) Building shape for all house types
The ridge of the roof must run along the longer side of the building.

Regarding the aspect ratio of eaves side to gable side, it is stated that this should not fall below 1.5 : 1 (but at least 1.3 : 1). Between the design, “final version,” and 1st amendment, only the (multi-page) cover sheet was repeatedly changed, referring to the continuation of earlier versions. Considerable effort and confusion over seven (!) building plots, although the original poster’s plot measures 723 sqm (7,784 sq ft) and the others are of similar size.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Z
Zauberwald
18 Jan 2024 17:54
Yes, a garden and terrace on the south side is the plan. Regarding the height, there are regulations stating that the eaves height on the slope-facing side must not exceed 5.50 meters (18 feet) measured from the original ground level.