ᐅ House placement on a sloped lot: Where should the house be located?

Created on: 17 May 2024 16:41
K
KrisHoss
Hello,

we have purchased a fully serviced plot of land from the municipality. I have already had it surveyed. The plot is sloped, dropping steeply at the lower right corner. After some consideration, I have identified two possible locations for the house (approximately 70 m² (750 sq ft) footprint with a basement, not yet finalized) with different advantages and disadvantages. Maybe you can help me decide between these options. The expected costs for the site work and earthworks for the two options are the main focus.

Option 1: The house is located at the upper corner of the plot, with the basement fully underground. Here, about 4.5 m (15 ft) of hillside at the lower right corner need to be retained.
Advantage: The house sits high, likely offering a better view over the valley, with a south-facing garden (is this an advantage?)
Disadvantage: In my view, the lower right corner looks unattractive. The steep slope is probably complex and costly to build and maintain.

Option 2: The house is placed at the lower right corner. Here, the house and the hillside garage retain most of the land. The remaining retaining structures are then moderate in height.
Advantage: It appears better integrated into the terrain, with no unnaturally high support structures. Large courtyard on the eaves side.

Development Plan / Restrictions
Plot size: 625 m² (6,725 sq ft)
Slope: yes, steeply sloping at the lower right corner, see elevation plan
Site occupancy index (Grundflächenzahl): 0.4
Floor space index (Geschossflächenzahl): 0.8
Building envelope, building line and boundary: see attachment
Number of parking spaces: 2
Number of stories: 2
Roof type: gable
Maximum heights / limits: eaves height 4.5 m (15 ft). The reference point is not entirely clear to me, see excerpt from the development plan
Additional requirements: retaining walls max 1.2 m (4 ft) above natural ground level

Client Requirements
Basement, stories: fully basement
Number of people, ages: 2 adults, 2 children (2 and 3 years old)
Room requirements on ground floor and upper floor: office and hobby room, location flexible
Office: home office for the wife, possibly private office for the husband
Guest bedrooms per year: rare
Open or closed architecture: rather open

House Design
Designer: terrain plan created by me using freeware, floor plan draft by general contractor, although this is not the main focus of my thread
Cost estimate according to architect/planner: about 460,000 (SF)
Personal budget limit for the house, including fittings: 500,000
Preferred heating system:

As mentioned, in the first step I want to find the best location for the house considering site costs and other factors. Accordingly, the entrance will be either at the eaves or gable side.

I would appreciate your assessments of the options, and maybe someone has a third idea?

Thanks and best regards,

Kris
Grundriss eines Hauses mit Terrasse, Zufahrt, Gehweg und Gartenfläche (Maßangaben).

Weißes Einfamilienhaus auf erhöhter Parzelle mit Spielplatz, Trampolin und Böschung.

Lageplan eines Grundstücks: Haus mit rotem Dach, Terrasse, umlaufende Gartenfläche und Maßlinien

Zweistöckiges Einfamilienhaus mit rotem Dach, gelbem Sockel, Carport und umzäuntem Garten.

Zweistöckiges Haus mit rotem Dach, Einfahrt mit zwei weißen Autos, Trampolin im Garten, weißer Zaun

Architektur Grundriss: farbige Plan-Ansicht von Grundstueck und Gebaeudeaufbau

Text erklärt Bezugspunkt TH/FH als Oberkante der Fertigdecke angrenzender Straßenverkehrsfläche.
Y
ypg
17 May 2024 22:30
KrisHoss schrieb:

For personal reasons, we would prefer a traditional layout with a basement, living space on the ground floor, and bedrooms on the upper floor.
However, this is not feasible due to financial constraints.
KrisHoss schrieb:

I have to provide support on either side with any option..
That's correct. You’ll need to shore it up regardless. You have to deduct these costs from your budget. This means you can afford a house of about 160 square meters (1,722 square feet) in total, not a 150 square meter (1,615 square feet) house plus a basement. Also, a terrace and some landscaping will incur additional costs, as will a proper drainage system. You should plan your house very carefully with a detailed budget.
K
KrisHoss
17 May 2024 22:35
I have a reasonable offer for a house plus basement for 460,000. Planned 140,000 for everything else initially. Where do you see the cost driver that makes this not work? Put the financial aspect aside for a moment—where and why would you place a basement, ground floor, and upper floor house on the plot?
Y
ypg
17 May 2024 22:59
KrisHoss schrieb:

Put aside the financial aspect for a moment—where and why would you place a basement level, ground floor, and attic house on the plot?

No, I am not responsible for designing castles in the air. This only wastes the builder’s time and lets them dream about what might be possible.
KrisHoss schrieb:

I have a reasonable offer for a house plus basement for 460,000

Yes, that is a catalog price, basically a teaser price based on a standard scope of work.
Just take some time to familiarize yourself with construction costs. Believe it or not, since 2022, the price per square meter of living space built in standard construction and quality starts at about 3,000€ plus additional construction-related costs plus everything related to the plot.
K
KrisHoss
17 May 2024 23:04
That's fine, I expect that. But now, where and why?
Y
ypg
17 May 2024 23:31
KrisHoss schrieb:

That’s fine, I’m expecting that. But now, where and why exactly?
First, please upload photos of the plot and the street, and let us know the location of the development plan. Sunny slopes can be found in many cities.
K
KrisHoss
17 May 2024 23:42
On the sunny slope of Hauenstein/Pfalz
The pictures give a rough idea of the layout.
Road under construction, sandy soil, houses with red tiled roofs, trees and hills in the background.

Construction site and partly finished house in the foreground, red roofs on the left, forested hills in the background.

Paved curved path, earth mound, blue pipe, street lamp, orange construction machine, forest.

Aerial view of a building area with vacant plots, roads, and surrounding forest.

Site plan of land parcels showing C5 (613 m² (6597 sq ft)) and C6 (639 m² (6875 sq ft)) as well as other areas.