ᐅ Separate Apartment for Parents: 210 m² Detached Single-Family House with an 80 m² Self-Contained Apartment

Hello everyone,

We are planning to build a house with a separate apartment for parents.
The main house will have two full stories and a hip roof, and to reduce costs a bit, the separate apartment and the garage will have flat roofs.

The house will be built in a new development, and I have already designed the floor plan.
The plot measures 924 m² (11,470 sq ft) and is numbered 30 on the site plan.
Site coverage ratio: 0.4
Floor area ratio: 0.6
Building height: 4.5 - 6.5 meters (15 - 21 feet)

The driveway can only be on the west side because there will be a bus stop on the south side.

What concerns me:
On the upper floor, the east wall runs right above the living and dining area and is actually only supported by the wall between the stairwell and the storage room of the separate apartment. Could this cause any structural issues?

I have drawn the exterior walls as 45 cm (18 inches) thick and the interior walls as 15 cm (6 inches). Load-bearing walls could probably be reduced to 20-22 cm (8-9 inches).

The “wet rooms” like bathrooms and toilets are spread throughout the house, and the separate apartment will have its own heating system. The sewer drainage gullies are located at the south edge of the plot near the bus stop.

Hello,

As you mentioned, the structural engineering is problematic: there needs to be a proper separating wall between the granny flat and the main apartment. Additionally, the upper floor must be properly supported. This zigzag separation seems to have just happened by chance???

How is the east wall on the upper floor supposed to run? How about the roof? I believe this is a mess.
For this house, the masons would finally get edge allowances again, if it were buildable.

Is there a parking space and a terrace for the granny flat?
The bedroom window of the granny flat faces the main apartment’s terrace. The bedroom window points south, the kitchen window west. The bedroom will get too hot, the large kitchen will be too dark. The living room is almost non-existent. There is a sofa and armchair, but the arrangement is very awkward and lacks coziness. No door has space-saving wardrobe placement behind it, which means a family wardrobe (or a wardrobe for two people) won’t fit. Washing machine and dryer stacked in the bathroom? Then they partially block the window.
If someone in the granny flat is ill, the other person can’t have visitors because the toilet is located at the opposite end of the flat.
The common room is a dark cave.

Regarding the main apartment:

Is there a heating system for the main apartment? I can’t find one.
I find it unfortunate to have a sauna behind the garage and storage room… Is this meant to be heated living space or outside the thermal envelope?
The storage room will be freezing cold and the pipes may freeze… you’ll be walking through sand…??? The bathroom there is too cramped to access the sauna.

I like the kitchen, but not the placement of the refrigerator — it will cause excessive walking distances.

The door placement issues continue upstairs: I’m not talking about the door swing; most problems arise from incorrect use of the software and can be fixed quickly.
The hallway is nicely wide, but the doors… now I found the heating.
The heating’s location is poor for the utility connections.
I don’t like the doors at the top end of the hallway. Also, south-facing windows are scarce in this area. The walk-in closet has no window — I assume this is to maintain symmetry? A washbasin for five people?
The bulge in the entrance and bedroom area seems unnecessary.

Is there a reason why the house is turned away from the southwest “sweet spot” (other than the street, which I assume is just a residential road)?

Just for that reason alone, I would redesign everything.

If you like it like this: many other things listed here don’t fit well and apparently just happened. It’s not optimal.

Why don’t you have a professional designer plan this?

And: https://www.hausbau-forum.de/threads/grundrissplanung-unbedingt-vor-Beitrag-Erstellung-lesen.11714/

Please read and...

This is quite a confusing maze of small rooms and walls. This collection of minimum dimensions (which are already compromised in several places) completely falls apart as soon as you imagine even just one piece of furniture slightly moved within the entire house.

I recommend using paper and pencil. It becomes much clearer when drawing if you are creating a labyrinth. Using colors and automatically adding dimensions also helps make nonsense look like it could actually work.

schustrik schrieb:
und um die kosten etwas zu drücken auf der Einliegerwohnung und der Garage ein Flachdach.

in combination with

schustrik schrieb:
Die "Nassräume" Toiletten usw sind auf dem ganzen Haus verteilt,

is practically a summary of an extremely confused approach.

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https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

You are all right in many ways; most things developed naturally.

I have already considered many layouts and drawn them, as you can see in the photo below.

Yellow: Garage
Blue: Single-family house
Turquoise: Granny flat

However, I am still not 100% satisfied with any of the layouts because several factors must be taken into account.
- Driveway only from the west side.
- Garage and granny flat should be attached to the house.
- Sunny side
- The main house should preferably face the sunny side to the south, southeast, or southwest.
- The single-family house is intended to be a townhouse-style villa; if the granny flat is on the side, the upper floor of the single-family house would also need to be built over it.

The toilet behind the garage is mainly for summer use, so you don’t have to walk through the whole house dirty to shower. The sauna will be heated as needed, so it will be warm there. Where else should it be located? It should be on the ground floor.

“Is there a reason why the house is angled away from the southwest ‘cream spot’ (aside from the street, which should only be a residential street)?”

Do you mean why the house isn’t positioned facing southwest? It could be; there is no particular reason.

No, why is the house facing away from the southwest side?
South-facing windows are important! Orientation matters.

A quick idea:
-> Garage along the northern boundary, built on the property line. Next to it, the entrance to the granny flat, which extends towards the back, living room/terrace facing south/east. Main house in the middle with a terrace on the southwest side...
Is a granny flat even permitted?

Best regards, Yvonne

I had also considered placing the garage on the north side, but then you cannot access the garden of the single-family house directly from the garage. And if, as I understand it, the entrance to the granny flat is located to the right of the garage, there is no private passage from the single-family house to the garage because you would have to go through the entrance area of the granny flat.

Yes, a granny flat is allowed, and even two semi-detached houses are permitted, but only a total of two dwelling units.