Cost estimation for renovating a 70s bungalow, any experiences?

Good morning,

This is my first post in the forum. My wife and I are about to buy a bungalow from the 70s. ~120 square meters, partially basemented to ⅔.

We are currently planning the costs for the renovation and would like to get an assessment from the forum. The following work is to be done:

[*]Flat roof insulation (wood substructure which is still in good condition, so "only" new roof construction with insulation and bitumen
[*]ETICS for approx. 120 sqm wall area
[*]6 windows, front door and a 5m wide sliding door element
[*]Basement ceiling insulation
[*]New electrical wiring
[*]New sanitary pipes
[*]Heat pump + underfloor heating (the underfloor heating probably milled in the basement area, in the rest of the area screed removed, insulation and new construction)

We have invested some time in the research but still only have a rough idea of the costs.

[*]Roof renovation €40,000
[*]ETICS €30,000
[*]Windows + doors €25,000
[*]Basement ceiling €5,000
[*]Electrical wiring €15,000
[*]Sanitary (pipes), heat pump, underfloor heating €45,000

That adds up to €160,000, plus 10-20% buffer.
What are your experiences? Do you think this is feasible?

Pictures and plans are quite good for being able to assess that.

Here is a floor plan. The area of the two bedrooms and the long corridor are not basemented.

Fits so far based on a gut feeling.

[*]Roof renovation €40,000
[*]ETICS €30,000
[*]Windows + doors €25,000
[*]Basement ceiling €5,000
[*]Electrical €15,000
[*]Sanitary (pipes), heat pump, underfloor heating €45,000

That makes a total of €160,000, plus 10-20% contingency.

Don't forget the floor and wall coverings. If painting a new building costs €10,000, it does for a renovation as well. Floor coverings on new underfloor heating, and what about new bathrooms?… new kitchen?

It is common to calculate €2,000/sqm living space for a renovation.

Kitchen and bathroom (+WC) are more cost-effective for us. The same applies to floor coverings and similar items. These costs are planned and will be added on top of the €160,000. For me, it was primarily about the "plausibility check" of the costs mentioned above. We are planning overall with not quite €2000/sqm but rather closer to €1850/sqm.