ᐅ Are Additional Costs for Building on a Sloped Plot Predictable?

Created on: 3 Dec 2019 07:46
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BauherrFranken
Supply and demand are currently driving our frustrating search for a plot of land. We have finally found one, but it is being offered privately at a price well above the official land value estimates.

It is a south-facing slope plot, located above the street. Would you consider the additional costs related to the hillside location (site setup, excavation) to be predictable?

Sidewalk along an asphalt road, grassy embankment with leafless trees in the background.
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ivenh0
7 Dec 2019 16:53
Take a look at our plan. We have the same plot type.

As a previous commenter suggested, we have also slightly integrated the garage into the basement and designed the roof as a terrace.

Costs for retaining walls and backfilling, or partly just sloping, are around 50,000.

The exterior stairs and so on are extra. So for the landscaping, you can expect 80,000 to 100,000, especially because the building envelope is located far back on the plot, resulting in a long driveway if the garage is in the basement.

Modern villa with courtyard; two heavily pixelated cars in front of the garage.
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BauherrFranken
7 Dec 2019 17:01
Looks great! However, the costs mentioned are quite steep.
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KEVST
7 Dec 2019 17:38
@ivenh0
I like it.
How tall are the retaining walls at the garage? Do you happen to have any more pictures from different angles? Ideally, also of those on the street side.
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ivenh0
7 Dec 2019 18:17
At the garage, Kronimus masonry panel / L-block 305cm (10 feet) long. Larger ones are not manufactured.
On the street side, we had to use natural stone due to planning permission / building regulations. My wife likes it, but I would have preferred to use masonry panels throughout.

Here are a few pictures from the construction process. Unfortunately, I don’t have any recent ones available.


Baustelle: Betonwand, offener Kellerzugang, Erde, Kabel; modernes Gebäude im Hintergrund.


Nächtliche Baustelle: Bagger auf Erdwall neben Steinmauer vor Häusern, Laterne leuchtet.


Neubau auf Hügel mit Gerüst, daneben kleines Haus mit Solarmodulen; Steinmauer rechts; blauer Himmel.
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haydee
7 Dec 2019 20:47
Do you have a plan with elevation details and have you clarified the building envelope?

Also, estimate that the exterior landscaping or additional costs due to the slope will be around 100,000.
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BauherrFranken
7 Dec 2019 21:04
Whereas I do not plan to make it nearly as luxurious as ivenh0 has. The garden itself will not be filled in, so the retaining wall at the property boundary will not be excessively high. Without a doubt, it all looks truly world-class.