complete renovation of an old single-family house

All in all difficult. You have to see what you want to achieve. If you want to renew the heating and underfloor heating, then the screed has to be removed or milled everywhere. All floors out, screed treated possibly new, new floors in. Hallelujah. As Joedreck already wrote, hard to say.

Personally, I would start with the roof insulation or renewal. Then the windows, then see further. Maybe also first the windows and then the roof. You can do both as long as you live in the house, hardly a problem. Probably brings the most energetically and are big chunks.

New pipes, well does it have to be? If the old ones still work and there is no leakage anywhere, why do the work. New electrics, well does it have to be? Here and there you could set a few sockets, but taking out old cables and putting new ones in just to have it done doesn’t make sense. I would only install new sockets if there is only one or two outlets in the room. You can renovate a bathroom without having to lay new pipes. Sometimes you just can’t move the old building where you would like it. And if, then only with really, really big effort.

So my approach would be Roof – check condition – define renewal measures – cost estimate Windows – check condition – define renewal measures – cost estimate Heating – check condition – define renewal measures – cost estimate

These would be for me the three most important points to look at and assess together. What is worth it most initially. The facade can be done later as I think, because I am of the opinion that with facade insulation you don’t get out as much energetically as with one of the above points.

A renovated bathroom, new floors, new paint on the walls and similar would only have top priority for me if it is close to unbearable.

I basically agree with you. However, I assumed a complete renovation based on the title. At first, even in an uninhabited condition. However, with bathroom renovations, I would always check the condition of the piping (water and wastewater). For example, the galvanized steel pipes tend to clog up. If that happens two years after the bathroom renewal, you freak out. Likewise, if shortly thereafter the old cast iron downpipe develops a leak. With copper and plastic, on the other hand, I wouldn't have anything done either.

Insulation in the order suggested by my predecessor. Although facade insulation, for example, can also be well implemented as DIY work, provided you are not completely unskilled.

I would always do the electrical work if a room is being renovated anyway. From my own bitter experience, I know how annoying it is to have to do it afterward. You can also save money here if you pull the cables yourself and install the boxes yourself. The old cables do not necessarily have to be removed, just decommissioned. Connecting them MUST be done by a professional!

But as I said: more data about the house, the budget, and possibly the intended scope please! Otherwise, we are stabbing in the dark.

Phew... difficult when you live inside and want to keep living inside. Our neighbors are renovating floor by floor. But they are really fed up with the dirt.

We bought an old building whose roof and facade as well as almost all windows are still in good condition. Besides, we don't live there because with 2 kids it actually wouldn't have worked at all.
It depends on what needs to be done. I would also call in a professional, a civil engineer or an architect for the survey and the planning; they often have good craftsmen at hand. Our procedure so far was: demolition from the inside (bathrooms except for one toilet and one sink, wallpapers, old electrical wiring, doors, 2 partition walls, old floors down to the original floorboards, wallpapers, partly old interior plaster... basically we created a shell condition inside), then the professional rewired the entire electrical system, the plumbers removed radiators and installed the rough plumbing, cut off old lead pipes and laid new connections and installed old pipes. A professional will do the roof conversion and we also let a professional do the tiling. At the moment we are working on the drywall (lowering ceilings and building a few walls), filling the electrician's chases. Then partial replastering will be done, with the help of an experienced DIYer who has renovated his half-timbered house 100% by himself. Most of it was really dirty work and physically demanding (jackhammer, removing tiles and plaster and taking it away). What is still to come are finishing jobs like laying floors, wallpaper, paint, new interior doors, etc. But it’s not rocket science if you’re not doing it for the first time.

But I think no matter how well you plan... if you live inside it will be uncomfortable. The dust gets everywhere. But well, it’s only temporary. As long as you can eat and sleep and have a toilet (you might shower at friends'/parents’), it should work for a while and then you just do more bit by bit. Although that is probably more time-consuming than doing everything at once. Good luck!

Hello, what became of your project, can you break down how you proceeded? What expected and unexpected costs have come up for you?

Hello,
at the moment it looks like I am still busy creating a concept for the exact procedure for myself. I haven't started in the literal sense yet.
Since I have to live in it continuously, unfortunately, it is not so easy to get things going.
I really thank you very much for your answers so far. !!!
Of course, I knew that this would not be easy at all, but I really did not expect it to be so difficult in detail, really not !!!
I will gladly give you an example.
What kind of new heating system is most sensible to install???
When consulting professional companies, it looks like everyone praises their heating concept to the highest degree.
Do you decide on a new gas heating system???????
Or do you rather decide on a pellet heating system, i.e., a boiler????
Others praise geothermal energy in the highest terms because you do not have to pay follow-up energy costs. Heat in the earth is always available for free!!!!!!
And you don’t want to do anything wrong and possibly tear out the whole heating system again after 2 or 3 years!!!!!
You can see just from this example of heating systems what kinds of questions come up that you have to decide on, how could you otherwise!!!
It is also all connected with enormous costs.
If I may realistically assess the situation, I fear that I probably will not be able to start the whole thing this year, let alone finish it, although I do not count myself among those people who always hesitate and procrastinate.
Your contributions so far have pleased me very much and almost all reflect practical knowledge of how it really looks and what really awaits one.
I actually do not want to close the thread yet, but would remain very interested in helpful contributions on the topic during my current planning phase to gradually create a roadmap for the project in order to avoid a construction fiasco once it gets underway!!!

Best regards and thanks to everyone who has participated so far and to all who will still contribute to the thread with tips, experiences, and good advice!!!!!

Alexander!!!!