
baulich
structural
Relating to construction, buildings, or architecture.
Das alte Haus hat einige bauliche Mängel.
The old house has several structural defects.
structural
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structural
Relating to construction, buildings, or architecture.
Das alte Haus hat einige bauliche Mängel.
The old house has several structural defects.
The adjective 'baulich' is derived from the noun 'der Bau' (the building, the construction). The ending '-lich' means 'in the manner of' or 'relating to'. So 'baulich' means 'relating to construction'.
Die Stadt plant neue bauliche Projekte am Flussufer.
The city is planning new construction projects along the riverbank.
'Baulich' is almost always combined with nouns that have to do with buildings or construction. Common combinations are 'bauliche Mängel' (structural defects), 'bauliche Veränderungen' (structural changes), 'bauliche Maßnahmen' (construction measures), and 'der bauliche Zustand' (the structural condition).
Vor dem Kauf der Wohnung sollten Sie den baulichen Zustand prüfen lassen.
Before buying the apartment, you should have its structural condition checked.
This adjective belongs more to technical and official language. It is often found in texts about architecture, real estate, expert reports, or official documents.
Das Gutachten listet alle baulichen Mängel des Gebäudes auf.
The expert report lists all the building's structural defects.
constructive
Both words can describe a deficiency in a building. Baulich refers generally to the building or its condition, while konstruktiv more specifically refers to the construction, structure, or load-bearing design. Use “baulich” for the general condition and “konstruktiv” for the way something is built.

Der Schaden ist baulich bedingt, weil das Gebäude an mehreren Stellen repariert werden muss.
The damage is related to the building because it needs repairs in several places.
Der Schaden ist konstruktiv bedingt, weil ein tragender Teil falsch aufgebaut wurde.
The damage is structural because a load-bearing part was built incorrectly.