Didn't I read something about 2.75 when skimming??
hm, that probably only applies to solar systems... Should there be one installed there? But tell me: what does the person who prepared the building application say? Your specialist planner? So, otherwise it could be due to your building height, the neighboring buildings, or the roof overhang. Otherwise, just call the building authority there. It's their job to explain in plain language when you have questions about an official letter :)