Funding opportunities for barrier-free construction?

Hello,
we are still at the very beginning of the planning phase. It is also not decided 100% yet.
My question now relates to the not insignificant detail of accessibility. Due to a chronic leg injury, I will need to live more or less barrier-free sooner rather than later. (Life happens, as we know, while making other plans.) At the moment, we live on the 5th floor without an elevator. For me, stairs are/will be the biggest problem. Walking on flat ground will hopefully still be possible for a long time, even if at some point with an endoprosthesis and then with a prosthesis. That if things go well!

Are there funding options for a barrier-free new building? If yes, what needs to be submitted for that? Only the construction/planning itself or the severely disabled ID card with the G mark?

How high are the additional costs or what should be considered?

At first, it is only about having no or not too many steps. But if we are at it, we want to build in such a way that we can stay living there well into old age, i.e., wheelchair accessible. Is that possible with a KFW-70 house? Would two full floors with the option to retrofit an elevator be more sensible or a bungalow right away? I don’t want to use a basement for laundry at all, since that means steps, which is the first thing I won’t be able to manage anymore, or rather, I already had a phase when the stairs here caused me problems. At the moment I have no problems, but that won’t last forever.
If I hardly want to use the basement, it would only be for the technical equipment. Is that worthwhile then, or do I have to have a basement for the technical equipment? Ultimately, it would probably save a lot of money not to build a basement.

Basement: building into the ground is always the most expensive way to build. Calculate a sufficiently large utility room where all the technology fits, washing machine, dryer, and various drying racks, and where you can still move around. This room will be large (possibly 15 sqm), but still cheaper than a basement. We even have two utility rooms: one on the ground floor for the technology and as a pantry next to the kitchen, one on the upper floor for the laundry (the laundry is processed where it arises).

Good point, thanks!
Technology below, laundry above sounds good. Although, if you already have a plot of land, you might also want to dry clothes in the garden. However, I probably have to make compromises. We are still quite inexperienced and first want to explore whether building a house really makes financial and practical sense for us, or if it is worthwhile.

To be honest, I don’t really understand what the deal is with the basement. From what I hear, it seems to be considered part of a full-fledged house for many people. Sure, you save land area. However, the costs seem to rise significantly because of it.

It would be wise to know in which federal state you want to build, or did I overlook that? If Berlin is correct, then I have no idea whether there are state subsidies.

Do you have a registered/recognized (or whatever) severe disability? In NRW there are then state subsidies with preferential conditions.

I am not aware of anything at KfW for new construction. However, if you want to buy an existing property and then modernize it to be barrier-free, then take a look at program 159 at KfW.

I myself live on the 3rd floor of a multi-family house and have the washing machine in the basement, but even a 2-story house with a basement doesn’t make it any better. There you still have more or less regularly two floors ahead of you. If you don’t want to build/plan straight away with an elevator or stairlift, then your wish sounds like a bungalow with a large (huge) basement substitute. 1 utility room, 1 pantry, and ideally somewhere a parking space or a large garage.

Regarding drying in the garden: a balcony or a roof terrace would probably be a good substitute.

As toxic already says, a bungalow is probably best for your requirements.

For accessibility in old age, we are planning our house so that we could live entirely on the ground floor in old age. The study/guest room will become the bedroom. The guest WC has enough space reserved to retrofit a bathtub. The door widths are dimensioned accordingly. Of course, it is not as spacious as, for example, in "proper" barrier-free construction for nursing homes, hospitals, or 100% barrier-free apartments, but it is a good compromise. It would be possible to move around everywhere in a wheelchair if necessary.

@toxic: Yes, Berlin is true. Well, let's say, if it were 2 floors, I would definitely plan it so that an elevator can be retrofitted. What you say I also see, so I don't think the idea of laundry upstairs and technology downstairs is bad. No, I don't have any degree of disability at all. At the moment, I can still easily get up the floors here, I can walk a long time, bike, swim. But I notice how my leg is increasingly causing problems, I also have bad phases sometimes and know it will only get worse. Since I already know what lies ahead for my leg, I don't want to wait until day X and then have to force a quick compromise solution. Other factors come into play that make building a house attractive for us, but if we build, it must definitely be barrier-free, since this issue will affect me sooner rather than later. And if I decide on an endoprosthesis (just a matter of a few years), I will be at least half a year so impaired in walking that I can forget about living in the current apartment. And that's only if it goes well, it could also go differently... tsss The whole cycle then repeats roughly every 10 years, also only if it goes well. So I will be confronted with this topic for the rest of my life. What from this perspective speaks against a house, on the other hand, is the fact that I am more mobile here. At the moment, I only walk 5 minutes to the S-Bahn. I have always managed that even in bad phases and could thus go to work, or further training, could shop, go to the doctor, meet friends, the usual stuff. A plot of land that is so conveniently located will be hard to get or maybe not even affordable for us, even though financially it's not so tight now. If you live remote, you immediately need 2 cars, which is also a cost factor. @klblb: Yes, what you mention is the usual solution to see the ground floor for old age. A bungalow just needs space, that's the downside. If you also plan the technical room and at least 1 car to park on the property, hardly anything is left of the plot. I have to see what such an elevator costs. What I also find important, apart from sufficiently wide doors and no thresholds, is a barrier-free bathroom, meaning a shower accessible at floor level right away. The bathtub usually causes problems first, like stairs and bathtub entry and exit.