Financing model - how to proceed?

That's why my question was whether it makes sense to first obtain concrete offers. For the estimation, I of course spoke with people who have experience. But I have not had on-site appointments with craftsmen. Therefore, it cannot be finally assessed what, for example, is the condition of the roof.

I can gladly share my estimate here. As said, very rough.

New roof covering ??? 6,000.00€
Gut / Demolition (own work) 2,000.00€
Drywall construction, roof insulation 6,000.00€
Modernize heating system (underfloor heating bathroom) 10,000.00€
Complete electrical 1 10,000.00€
Screed 90 20.00 €/sqm 1,800.00€
Lower ceilings 3,000.00€
New hallway stairs 10,000.00€
Complete painting 10,000.00€

Basement
Floor 1,500.00€
Doors 300.00 €/each 1,200.00€
Walls 500.00€
Washing machine platform 100.00€

Ground floor
Front door 4,000.00€
Doors 3 400.00 €/each 1,200.00€
Floor covering 5,000.00€

Upper floor
Doors 4 400.00 €/each 1,600.00€
Stairs to attic 900.00€ 900.00€
Floor coverings 3 rooms excl. bathroom 3 1,000.00 €/each 3,000.00€

Kitchen
Kitchen with electrical appliances 15,000.00€

Guest WC
Complete 1 2,500.00€ 2,500.00€ 0.00€

Bathroom
Complete 15,000.00€

Windows
2 roof windows (1x with blinds) 2 1,500.00 €/each 3,000.00€
2 windows upper floor floor-to-ceiling 2 1,000.00 €/each 2,000.00€
Kitchen window 700.00€
Dining room window 700.00€
Bathroom window 400.00€
Living room window + door 5,000.00€

With the current interest rates, a loan of €225,000 should be feasible with €3,400.

Küche
Küche mit E-Geräte 15.000,00 €

Most banks do not finance a kitchen. Therefore, it should be excluded from both the costs and the equity in the calculation for the bank.

Morning

The first items in your list seem a bit tight to me.
When it comes to the roof, also think about gutters, downpipes, chimney flashing .... etc.
If you redo the screed on the ground floor, I would also plan underfloor heating at the same time.
The €10,000 for the heating is then already tight as well.

Given the scope of the renovation, I would see the buffer rather at 15 - 20%.

Olli

The heating system is not old yet. Underfloor heating is already present on the ground floor and should only be extended to the bathroom on the upper floor. I consider the €10,000 to be rather high in this case.

Hello again

O.K. that can probably stay as is.
I assumed a replacement and new screed.

Then I would clarify the matter with the roof more precisely.

Ollii

Does it make sense to buy the house first and then take out a second loan for the renovation? Or does it make no difference? (Equivalent value house!?)