Floor plan: who has the master bedroom on the ground floor?

Hello everyone,

since we (M31 / W24) will soon have the notary appointment for the purchase of our desired 463 m2 building plot in our hometown in southern Baden-Württemberg, we are currently vaguely dealing with the property and floor plan planning. However, we are (fortunately) not in a hurry to start construction due to a very favorable rental situation.

First of all: we are already in contact with an architect who will create a preliminary plan for us, but we are still curious about already implemented projects that correspond to our idea.

We would like a classic single-family house of medium size (170-180 m2?), for which there are millions of suggestions. However, very rarely do I see our wish realized, namely to place, besides a large living/dining/kitchen area, a guest WC and a utility room as a passage to the directly attached garage, the master bedroom with dressing area as well as a suitable bathroom (WC, double washbasin, large shower) also on the ground floor – and not as a "possible option for old age," but right from the start.
We are aware that such a design naturally takes up rare space on the ground floor, while there is a lot of space left in the attic.
This wish stems from the fact that I am somewhat physically impaired and especially stair climbing is not always easy for me (balance, etc.).
Since we do not yet know whether having children will be an issue or not, the option is on the table to plan only a study and a storage room for ourselves in the attic and to plan the larger remaining part of the attic as a possible granny flat, which in case of a family with 1 or 2 children can also be added back to the main apartment for the "20 years with children."

As an example, the Living Haus Sunshine 210 is in this league for us, but it seems quite large.

Now go ahead: has anyone done this as well and have pictures, hints, tips that should be considered in this particular planning?

Best regards
David

We would like a classic detached house of medium size (170-180 m2?),

That is not medium size, that is already quite spacious (and expensive nowadays).

Very rarely do I see our wish realized, to place, besides a large living/dining/kitchen area, a guest WC and a utility room as a passage to the directly attached garage, the master bedroom with dressing area as well as a suitable bathroom (toilet, double washbasin, large shower) also on the ground floor

That is common. It's called a bungalow. With the space requirement on the ground floor, you quickly reach an area of a normal detached house with 120 sqm. And then the upper floor on top. Therefore, there are hardly any suitable standard floor plans for this. Then you just have unnecessary (and expensively paid for) space upstairs that nobody needs.

plan the larger rest of the attic as a possible granny flat, which can also be added back to the main apartment for the "20 years with children" in case of family planning with 1 or 2 children.

That will be a mess. Then you already have to plan a proper staircase. And separate utilities. And a kitchen upstairs. And a complete bathroom. Just in case? You build a house as you need and want it. This "for all cases or maybe" always involves a lot of compromises, which also cost a lot of money. If the lot allows it, then build a spacious bungalow. An office or playroom for possible children can be created in the roof.

Important for the decision on how much floor area can actually be built over and how high the eaves or ridge potentially need to reach is the development plan! Nothing works without it. The roof topic is also fixed there. So what does the development plan say? I know quite a few floor plans that have everything practical for 2(-4) people downstairs, and upstairs either have two rooms plus bathroom or are intended for later expansion. Alternatively, there is always the classic two-family house. But then it will have the space level of two apartments. I already see parking spaces for 2 residential units quite tight with 460sqm. Do you want it like that on your desired plot? And then, of course, the building envelope also plays a role.

Mh letting children sleep on the other level is impractical for many years. You have an enormous space requirement on the ground floor and emptiness on the upper floor. Why don’t you plan a bungalow?

Show me a plan of the property. Is there a slope? What does the [Bebauungsplan] say? Or is there no [Bebauungsplan]?

Clarifying buildability before the notarization appointment is a good idea.

We implemented it this way to prevent the upper floor from becoming too large; we have the technical room as an extension with a flat roof. Such a thing is not available off the shelf and is probably not cost-optimized either.