ᐅ New construction of a two-family house with a separate apartment

Created on: 14 Jan 2015 09:03
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charlypoll
We are planning to build a two-family house with a possible granny flat and a basement (watertight concrete shell) due to the proximity to the Rhine River in a new development area in Cologne.
Key data are a 7 m (23 ft) eaves height, which corresponds to two full floors, with a roof pitch of 40 degrees. The buildable area is 12 x 12 m (39 x 39 ft), on a plot of 570 sqm (18 x 31.5 m / 61 x 103 ft).
The ground floor is intended for the older generation, with 3-4 rooms, kitchen, hallway, and bathroom.
The upper floor is for 2 adults and 2 children, so it includes 2 children's rooms.
The attic or basement is planned to contain a small apartment for 1-2 people.
We are looking for ideas regarding the possible floor plan, construction companies, architects, and experiences with prefabricated house providers. Planned start is around the end of 2016. Any tips are greatly appreciated.
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Bauexperte
14 Jan 2015 11:59
Hello,
charlypoll schrieb:

Yes, okay, we could still manage 300,000.
charlypoll schrieb:

Two-family house with possible granny flat, maybe with a basement (waterproof concrete) due to proximity to the Rhine.
Key details would be a 7 m (23 ft) eaves height, so 2 full stories, roof pitch 40 degrees. Buildable area 12 x 12 m (39 x 39 ft), plot size 570 sqm (18 x 31.5 m) (194 x 103 ft)
Ground floor for the elderly: 3-4 rooms, kitchen, hallway, bathroom.
Upper floor for 2 adults + 2 kids, so with 2 children's bedrooms.
Roof space or basement, small apartment for 1-2 persons.
Two-family house with hipped roof, KfW 70 including slab foundation: EUR 270,000
Additional cost for waterproof concrete: EUR 8,500
Usable basement: EUR 48,000
Basement finished as an apartment: EUR 25,000

All in: EUR 351,500

Two-family house with gable roof, KfW 70 including slab foundation: EUR 300,000
Finished attic (apartment): EUR 15,000

All in: EUR 315,000

For both options, the following costs need to be considered:

Additional construction costs: EUR 40,000
Painting and flooring work in own labor: EUR 20,000
Exterior landscaping in own labor: EUR 10,000 (only the essentials)
Reserve fund for extras: EUR 10,000

All in: EUR 80,000

Now you can probably understand why I suspected this was a test question 😉

Regards, Bauexperte
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charlypoll
14 Jan 2015 12:22
What do the additional construction costs include?

What do you mean by usable basement TEUR 48,000 TEUR?

I forgot to mention, it needs a 40-degree (40°) pitched roof.
However, I don't think this will significantly affect your prices.
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Doc.Schnaggls
14 Jan 2015 12:39
A utility basement is not suitable for living purposes:

- no heating

- no plastering

- no painting, no wallpaper

- no residential windows (triple glazing)

- possibly lower ceiling height

So, a basement that can only be used as storage space.

Best regards,

Dirk
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Bauexperte
14 Jan 2015 12:50
Hello,
charlypoll schrieb:

What do the additional construction costs include?
This isn't the first time I've wondered why users here "voluntarily" share their experiences if no one reads them:

https://www.hausbau-forum.de/threads/liste-der-baunebenkosten.9737/
charlypoll schrieb:

What do you mean by usable basement 48,000 thousand euros?
Dirk answered that perfectly!
charlypoll schrieb:

I forgot, it has to have a 40-degree (40°) pitched roof.
But I don't think it will significantly affect your prices.
Not really; if you add the costs of the usable basement plus finishing to the second example, it all matches up.

Regards, Bauexperte
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Bauherren2014
14 Jan 2015 13:08
Sorry, but you should first gather some information and do some reading here before jumping into the "house building project."
charlypoll schrieb:
Well, I don’t have to pay the 6.5% property transfer tax, so that’s about €20,000 less in additional costs

That must be an expensive plot of land.
The additional construction costs listed are all approximate figures that in reality can be somewhat lower or significantly higher. Just because you might not have to pay property transfer tax, which could be around €20,000 for you, does not mean that your remaining additional building costs will be only half as much.
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charlypoll
14 Jan 2015 13:10
Ok, thank you