Single-family house with flat roof from 1968 / renovated in 2013

Don't put the cart before the horse: first have the house inspected by an expert. They can assess everything on site and then estimate what needs to be done. They can also see what amateurs have done and what professionals were involved. This assessment might also be useful for you during price negotiations. If you decide to buy the house, the question is how much actually needs to be done. I would handle a few trades myself. But often there are craftsmen who cover several trades within the company. That would make sense then. For example, last year we renovated the ground floor with such a small "construction company" and they did the interior plastering, drywall, basement insulation, and screed, as well as a few small things like new window sills. Then we only needed a tiler and a sanitary company. This way coordinating the trades was relatively straightforward. But it really depends on what needs to be done. For a complete core renovation, you can certainly get "real" construction contractors.

You are right, but I am impatient about the appointment with the expert. I thought I might perhaps get a VERY ROUGH estimate here of what the simple renovation of the moldy basement without other damp rooms plus the roof renovation of about 110 sqm flat roof would cost...

You are right, but I am impatient about the appointment with the expert. I thought I might maybe get a VERY ROUGH estimate here of what the pure renovation of the moldy cellar without other damp rooms plus the roof renovation of about 110 sqm flat roof would cost...

I am not familiar with flat roofs, but with a hard roof, the amounts are usually in the higher five-figure range. With the cellar, it also depends on where the moisture is coming from. Under certain circumstances, the renovation costs are disproportionate to the benefit. As I said, everything has to be seen on site.

Especially in the renovation sector, a qualitatively (both craft-wise and commercially serious) broad spectrum of all-rounders is active. I do not see a core renovation in this specific case - rather a carte blanche damage repair (in an already somewhat "F" attractive property)...

Apart from your unwanted posts, you really do not come across as particularly competent in a professional sense here. How do you arrive at your judgment based on the given key points? You do not know the property, the city, the scarcity of housing, nor even the price, let alone the house size, room layout, etc. So your judgments seem rather arbitrary. I find it questionable anyway that you use this forum as a platform to gain paying customers for yourself... So, ciao Kakao

But if you make the plan yourself, you don’t just have, for example, the thickness of the walls or what a load-bearing wall is?

The wall thicknesses result or of course you can also measure them. Load-bearing walls are often determined if you consider the roof (ok, with you a flat roof, with a gable roof you can often identify the load-bearing walls via the framework). Experts can also think the other way around, not just building up. If you have had no contact at all with a house or construction, you should have those do it who need it. For example, if you want to have a wall breakthrough made, then a structural engineer must inspect the house first. But you are not the only one with this problem. It often affects every old house.

You are right, but I am impatient about the appointment with the expert.

Do you already have one?

I am not familiar with flat roofs

Old flat roofs or flat roofs of old houses often have the problem that they become leaky. Is this a bungalow? You can also block users so that you don’t have to read them. Do you have an ID number from a real estate portal? Then forum members can take a look at how the house presents itself in the listing. There are always obvious details in photos that say a lot, for example spotted facade, damp extensions, cavities, or splash protection at the house. Links are not allowed here, but hints about the location, district, size or the ID, that is doable.

Does the flat roof really have only 110 m2?

I am not a calculator but if it only needs to be waterproof, it is possible from €30 per m2.

If you do it properly, then from €250

The emphasis is on from

I don't believe that the flat roof still dates from the year of construction. Maybe the owners just don't know any better

The wall thicknesses result or of course can also be measured. Load-bearing walls are often determined when considering the roof (ok, in your case a flat roof, with a gable roof one can often identify the load-bearing walls via the framework). Experts can also think the other way around, not just progressively. If you have had no prior contact with a house or construction, you should have those who need it do it. For example, if you want to have a wall breakthrough done, a structural engineer must inspect the house beforehand. You are not the only one with this problem. It affects almost every old house. Do you already have one? Old flat roofs or flat roofs of old houses often have the problem that they become leaky. Is it a bungalow? You can also block users so that you don’t have to read them. Do you have an ID number from a real estate portal? Then forum members can take a look at how the house presents itself in the listing. There are always obvious details in photos that say a lot, e.g. patchy facade, damp extensions, cavities or splash protection at the house. Links are not allowed here, but hints about the location, district, size or the ID itself are possible.

Thank you very much! No, it is not a bungalow in the strict sense. In the basement on the left is a part of a classic basement (heating, laundry room, storage) and on the right with a separate door a corridor, 3 rooms and a bathroom. The entrance is also downstairs. Upstairs are then the kitchen, living room, bathroom, etc. Unfortunately, I don’t know how I can give a hint since the listing has now been deleted....