Estimate of construction costs for a single-family house in the Tübingen area

That looks like a road constructed ready for billing, so there will be more than just surface drainage. The photos reinforce the suspicion of a flat plot (with the consequence that building a laundry room and a small gym between the slab and the ground floor must be worth you an extra cost of hardly less than 70k, even if you want to try tiling yourself). A lot of money for the pleasure of being able to go down one more floor to do the laundry. From the above-ground utility room you save the lifting station and a rotary clothes dryer still fits in the garden. The other beginners in the fitness studio also start with only a few plates, so be brave!

Now directly addressed:

if we were to build with a basement and want a laundry room there, then a "pump" aka lifting station would be necessary to bring the water from "down there" up to street level?

If we were to build with a slab, no lifting station would be necessary? In the end, the statement is: is the basement worth the cost for a lifting station, possibly drainage, and would a retaining wall or some kind of reinforcement be necessary to prevent the road from "sinking"?

I always assumed a flat plot would be ideal for construction.

Honestly, I’m just waking up a bit to the naive approach.

There could be worlds between these two statements

Separated from this one:

If you talk about finishing, you do not mean sprucing up the technical room and laundry room, right?
It reads more like you want to turn those rooms into living spaces.
And yes, there is also a mistake here.

But before someone corrects you, you should explain your basement plan.

Is the plot really flat, or are you just taking the picture at an angle? Unfortunately, there is no elevation mark further to the left.

There could be worlds between these two statements

Separated from this one:

If you talk about finishing, you do not mean sprucing up the technical room and laundry room, right?
It reads more like you want to turn those rooms into living spaces.
And yes, there is also a mistake here.

But before someone corrects you, you should explain your basement plan.

Is the plot really flat, or are you just taking the picture at an angle?

There is no elevation mark further left towards the boundary, help.

There is no elevation mark further left towards the boundary, help :(

Attached is an almost straight panorama

if we were to build with a basement and wanted a laundry room there, then a "pump" aka lifting system would be necessary to bring the water from "down there" to street level?

Water basically flows downhill - that's why there are water tanks following the principle of communicating vessels and sewer pipes laid with a gradient. The sewer must be lower than the wastewater discharge point; otherwise, it doesn't work without pump assistance. You can find the sewer heights from the cadastral or development plan or from the waterworks.

If we were to build with a slab foundation, no lifting system would be necessary? Ultimately, the statement is: is the basement worth it to me, considering the costs for the lifting system, possibly drains, and whether a retaining wall or any reinforcement would be necessary to prevent the street from "sinking"?

The street will not sink because of your basement construction; this should already be sufficiently secured by the building setback. Ultimately, the (but not really easy to understand) statement of the 11ant basement rule is: "a basement located one hundred percent below the original ground level will not be able to offset its construction costs with zero percent of the unavoidable terrain modification costs saved." Therefore, the conclusion for flat plots is usually that the basement costs should be fully recorded under the cost center luxury.

I always assumed a flat plot would be ideal for construction.

Without a valley view panorama, that absolutely applies, at least inland. At tidal waters or other flood-prone areas, this is relativized. And basically, deep basements under modern wheelchair-accessible ground floors are naturally a different matter than plinth floors under classic raised ground floors.

[QUOTE="11ant, post: 685778, member: 32750"] The sewer must be lower than the wastewater inflow, otherwise it won’t work without pumping assistance. You can find out the sewer heights from the cadastral or development plan or from the [QUOTE]

You mean the principle, right? I will inquire, I didn’t find a manhole on the property itself – but I wouldn’t expect one either.

In this particular case, the backwater level is almost the same as the current level. That means the two water columns would be almost the same height. Water column in the sewer and in the ground floor of the house. The cellar with the water drainage far below this. It depends now how deep the street manhole reaches into the ground, right? I have to be higher than that with the drainage in the cellar, there are surely guideline values for that. Accordingly, I would have to dig that deep, right? The cellar would be correspondingly.

[QUOTE="ypg, post: 685764, member: 12491"] When you say expansion, you don’t mean just sprucing up the technical room and laundry room, right? [QUOTE] No, by expansion I mean later installing a radiator. That means I would have to insulate the cellar shell, provide piping, correct?

[QUOTE="11ant, post: 685778, member: 32750"] Water basically flows downhill – that’s why there are water reservoirs following the principle of communicating vessels and wastewater pipes laid with a gradient. The sewer must be lower than the wastewater inflow, otherwise it won’t work without pumping assistance. You can find out the sewer heights from the cadastral or development plan or from the waterworks.

The street will not subside because of your cellar construction; this should already be sufficiently secured by the building line. Ultimately, the (but not really easy to read) statement of the 11ant cellar rule is: "a cellar lying one hundred percent below the original ground level will not be able to offset zero percent of its construction costs by saved inevitable land modeling costs." Therefore, the conclusion for a flat plot is generally that cellar costs are to be fully booked under the luxury cost center.

This applies absolutely without a valley view panorama, at least inland. At tidal waters or in other flood-prone areas, that relativizes somewhat. And basically, deep cellars under modern wheelchair-accessible ground floors are naturally a different matter than base floors under classic raised ground floors. [QUOTE]

I have now read through your cellar rules, I can’t even understand the first one. I guess it’s about how hilly the property is. The hillier the more expensive and pointless the cellar? No idea.

I find the roadmap very good – we will do our homework – the roadmap sounds like creating a requirements specification or a functional specification – that makes much more sense than rushing for floor plans and what it costs.

I always assumed a flat piece of land would be ideal for construction.

Yes, without a basement a flat piece of land is ideal.

I did not find a control shaft on the property itself -

No, you have to have that created yourself for your property and your drainage.

No, by expansion I mean attaching a radiator later on.

Why?

Yes, a flat plot is ideal without a basement.

No, you also have to have it created yourself for your property for your drainage.

Why?

In case the kids want to use it as a hobby room someday or I myself for a small DIY area. Workbench, etc. But honestly, this is how you get carried away with cool things you could do at some point.. the roadmap that distinguishes between must-have and nice-to-have is important first. Our specification sheet, so to speak.
We want a house that:
- has an open kitchen with a pantry
- it is important to us that the living area is as open as possible to keep an eye on the kids and offer as much freedom as possible
- a living area that is long enough to fit a table for about 12-14 people (max. 1 - 2 times a year)
- a guest room on the ground floor that can be set up as a bedroom in old age, with a standard 180x200 bed and a “classic Pax.” Initially serves as a home office or for when grandma and grandpa come on weekends and would sleep here.
- a shower bathroom on the ground floor that is easily accessible but does not have to be barrier-free
- children’s room size is important to us, equally sized for fairness
- bedroom size is not a priority and can benefit the children. However, parents and child 1/2 should be spatially separated
- a large walk-in closet is not necessary, nice to have but then with a window
- the staircase should not be too steep; I would find an intermediate landing important, I’m clumsy and I find pictures and such nice in the stairwell
- acoustic separation between living room and upper floor is absolutely necessary
- the dirty area must be completely separated from normal walkways
- the upstairs bathroom should have a T shower toilet combo and a skylight / if 2, a window above the bathtub (bathing is important to us)
- I would like to have a space somewhere where I can do my boxing sport (punching bag, a weight bench, a bit of space for jumping rope)
- storage space for bicycles, Bobby cars, suitcases, and all the bulky stuff you have with a maximum of 2 kids.

So these were the basic things that are important to us:

I am just unclear how to proceed after this list. Visit model houses? Visit parks? Get a feeling for what we imagine and what the reality is?
Would we find ourselves in a catalog house right away or not, what then?

Either way, to the architect who creates a preliminary draft for us with which we go to the various Heinz von Heidens of this world?

I think that based on the “must-have” things, a normal catalog house will come out. With smaller compromises here and there…

I am just unclear how it continues after this list. Visiting model houses? Visiting parks?

why not? You really haven't seen anything live yet?

it is important to us that the living area is as open as possible to keep an eye on the rascals and to offer as much freedom as possible

That's possible

a guest room on the ground floor, which can be set up as a bedroom in old age,

Count on 4-5 sqm more. The jack of all trades, which should also be slept in downstairs, but the guest shower is not planned congruently.

a shower bathroom on the ground floor, which is easy to walk into but does not have to be barrier-free.

How much minimum do you want to live on in old age? 2 sqm plus?

between landings I would find important,

ok, 2.2 sqm plus

The dirt area must be completely separated from normal walkways

3 sqm plus

The upstairs bathroom should have a T shower toilet combo

4 sqm plus

Would we find ourselves directly in a catalog house or not, then what?

No, most do not offer the plus must-haves.

going to the individual Heinz von Heiden of this world?

definitely not a Heinz von Heiden guy