Offer energy efficiency expert for old building renovation experiences?

Hello everyone,

I live in the west of Lower Saxony and have owned a farmstead with my wife for 2.5 years. We want and need to thoroughly renovate it now. I am currently planning all trades and working out a cost and effort overview. We have already had two construction companies and one architect take a non-binding look on site. Generally, everything is feasible and will be carried out with a considerable amount of personal effort. Two residential units will be renovated; for this, the KFW 261 is to be used. The goal is to achieve an efficiency house 70 or 55 standard, depending on what is technically and financially sensible.

So, now to the actual topic. I had an energy efficiency expert here; he is a full-time building energy consultant at a prefabricated house company and does this on the side for the KFW as well. He had very good technical experience, took his time, and we have a good feeling about him. Unfortunately, I have no comparison at all and would therefore like to ask here what you think of the offer. I would like to know if the price is reasonable.

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Thank you in advance for your comments!
Best regards

I expected 10 times that ;)

The price is okay. If he is actually competent and you can work well with him, then it's fine.

480 € for an on-site appointment including documentation, preparation, and follow-up... that's good.

Ask someone else for your gut feeling, e.g., your architect or a recommendation from them.