Hello Alex,
I am only interested in a mezzanine floor in connection with a parapet height of less than 4.5 m.
I lack the necessary time to review all development plans, so I have looked up the three most recent (comparable) development plans - regardless of whether they are single- or two-story.
**01. Development plan in Cologne: Parapet height: max. 4.00 m, ridge height: max. 8.20 - built: single-story with mezzanine + attic (the actual parapet height is below the maximum allowed parapet height; the maximum allowed ridge height is not reached)
02. Development plan in MG: Parapet height: 87.5, ridge height: 90.5 - approved: two-story + mezzanine (floor height ground floor 83.68, parapet height roof terrace 87.60 and floor height mezzanine 89.66)
03. Development plan in ME: meaningful development plan almost non-existent. Sold as two-story with flush mezzanine (knee wall 2.00 m) + pitched roof 12°, ridge height 9.54 m; built as such in the immediate vicinity. This was rejected by the building authority because the mezzanine was considered a third story; a centrally located, "regular" mezzanine would not have been a problem. However, our clients did not want that because they need "more" space in the attic. Currently being built is a two-story with 1.10 m knee wall + dormer and roof terrace: parapet height - 7.36, ridge height: 10.575 (attachment). Such an attic is, after all these years, a first for us.
**Addition: if built regularly according to the development plan, a knee wall of 0.75 m would have resulted with a roof pitch of 40°.
In discussions with the clerks of the various building authorities, one always has to be prepared for compromises. By and large, both parties have always been able to live with the solutions so far. Therefore, I assume that it always depends on how we approach the employees in the approving positions and not demanding the impossible; it is no different with the tax office.
Rhenish regards
