Bauexperte
2016-03-11 10:47:28
- #1
Hello,
That is true and also wrong at the same time; a construction contractor must provide you with an offer according to Kfw 40; the architect must provide an appropriate cost estimate. With what masonry – in centimeters – was the building permit granted?
You should have simultaneously consulted a system planner regarding photovoltaic and storage technology. He needs all relevant data about the planned construction project and especially the information about the heat demand. Afterwards, he can provide you with a precise fixed-price offer – end of calculation.
In our case, photovoltaic systems are – for various reasons – also not included in the scope of delivery of the cost estimate. The most important reason here is that it needs someone who knows what he is doing _and_ can be held liable in the event that KfW 40+ cannot be achieved, although the building envelope is prepared. We act *only* as intermediaries because we simply lack the expertise for exact dimensioning; however, we rely on long-standing partners. Personally, I am against *jack-of-all-trades* – either nothing would be done properly or I would have to work with your current status quo. Not my thing; everyone should do what they do best!
Planning a KfW 40+ from scratch is quite elaborate; you want to move an existing photovoltaic system with fixed consumers. That requires quite some calculations; the offered price fits for me.
There is – for cost determination – the way I described at the beginning. Then you at least have the figure for KfW 40 on the table and afterwards still need an offer from a system planner for moving the photovoltaic system. After that or simultaneously an energy consultant must calculate again, of course. In any case, quite a few euros will probably flow before you know whether everything works as you hope.
Greetings from the Rhineland
All construction contractors only give me offers for kfw55. I would have to sign this offer and then enter the calculation phase... only then would I know what surcharge achieving kfw40+ means. That is unsatisfactory. There are hints that it will only be feasible with a lot of effort and only with 50 cm walls and will cost more than the repayment subsidies (3x15,000€ + 18,000), being made.
That is true and also wrong at the same time; a construction contractor must provide you with an offer according to Kfw 40; the architect must provide an appropriate cost estimate. With what masonry – in centimeters – was the building permit granted?
You should have simultaneously consulted a system planner regarding photovoltaic and storage technology. He needs all relevant data about the planned construction project and especially the information about the heat demand. Afterwards, he can provide you with a precise fixed-price offer – end of calculation.
In our case, photovoltaic systems are – for various reasons – also not included in the scope of delivery of the cost estimate. The most important reason here is that it needs someone who knows what he is doing _and_ can be held liable in the event that KfW 40+ cannot be achieved, although the building envelope is prepared. We act *only* as intermediaries because we simply lack the expertise for exact dimensioning; however, we rely on long-standing partners. Personally, I am against *jack-of-all-trades* – either nothing would be done properly or I would have to work with your current status quo. Not my thing; everyone should do what they do best!
An energy consultant and passive house planner I found, who seems competent and open enough to me, on the other hand presents the feasibility as promising, but does not give me a price for the house construction. That would require extensive planning which they initially want to charge me about 4,000€. Only then would I know a price at all and possibly realize that this is outside the budget or that kfw55 would in any case be the more economical alternative!?
Planning a KfW 40+ from scratch is quite elaborate; you want to move an existing photovoltaic system with fixed consumers. That requires quite some calculations; the offered price fits for me.
There is – for cost determination – the way I described at the beginning. Then you at least have the figure for KfW 40 on the table and afterwards still need an offer from a system planner for moving the photovoltaic system. After that or simultaneously an energy consultant must calculate again, of course. In any case, quite a few euros will probably flow before you know whether everything works as you hope.
Greetings from the Rhineland