A building permit for the conversion of a 50-room hotel into residential micro-units was eventually issued by a planning authority in one of Germany’s ten largest cities. The client and I marked the occasion — because the consent had taken four years and three applications to obtain.

We had, in hindsight, been naïve. Converting two residential buildings, used as a hotel for 30 years, back to their original classification — how complicated could it be? The answer was: considerably more complicated than the German residential development market would suggest is rational, and a partial explanation for why so few new homes are built.

The list of applicable local statutes ran to: a social preservation ordinance; an accessibility requirement; a children’s play area; buggy storage; cycling parking standards (including cargo bikes); a tree and green space protection ordinance; conservation restrictions — alongside the expected demands of the fire protection concept, the energy performance certificate, and the building code. On the internal courtyard, after allocating the minimum green area, the flanking planting strip and the distance planting zone, no space remained for vehicle parking. The 100 cycle spaces, plus cargo-bike provision, had not yet been addressed.

A cooperative planning authority (they do still exist) helped us through a dozen exemptions that removed the sharpest edges of compliance. The conversion is now technically approvable. Whether it remains commercially attractive — given that the hotel market has since recovered while residential development becomes more complex — is another question entirely. One conclusion is inescapable: Germany’s consenting process ensures that the built environment responds to economic cycles with a lag of at least one full phase.