bauen
to build
To erect or construct a building or another structure.
Meine Nachbarn bauen gerade eine Garage neben ihr Haus.
My neighbors are currently building a garage next to their house.

to build
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to build
To erect or construct a building or another structure.
Meine Nachbarn bauen gerade eine Garage neben ihr Haus.
My neighbors are currently building a garage next to their house.

The meaning of 'bauen' (to build) depends heavily on the context. A concrete object (house, wall) points to construction, while the preposition 'auf' expresses trust, and the object 'Mist' refers to a mistake.
Die Kinder bauen eine Sandburg am Strand.
The children are building a sandcastle on the beach.
In the literal sense, 'bauen' (to build) is often associated with large structures. Typical objects are: a house, a bridge, a road, or a wall.
Die Stadt plant, eine neue U-Bahn-Linie zu bauen.
The city plans to build a new subway line.
In the meaning of 'sich verlassen auf' (to rely on), 'bauen' (to count on) is always used with the preposition 'auf' and the accusative. The structure is: 'auf jemanden/etwas bauen' (to count on someone/something).
Ich baue auf deine Zusage für das Projekt.
I am counting on your confirmation for the project.
The expression 'Mist bauen' (to mess up) is a fixed and very common colloquial phrase. It means that someone has made a mistake or done something stupid.
Ich habe Mist gebaut und den Kuchen im Ofen vergessen.
I messed up and forgot the cake in the oven.
Similar to English, 'bauen' (to build) can also be used for abstract concepts. For example, you can gradually build a relationship, a career, or trust.
Es braucht viel Zeit und Mühe, eine gute Reputation zu bauen.
It takes a lot of time and effort to build a good reputation.
to develop
'entwickeln' and 'bauen' can both mean that something new comes into being. 'bauen' fits especially well when something concrete is created, for example a house, a bridge, or a model. It can also be used figuratively, for example with a career or relationship. 'entwickeln' puts more emphasis on the plan, the idea, and the gradual working-out, for example with software, products, or concepts. Learners may confuse the words because in technology you sometimes hear both. As a general rule: you build something with material or structure, and you develop something with planning and ideas.

Nach dem Gespräch bauen die Kinder zusammen ein kleines Haus aus Holz.
After the conversation, the children build a small wooden house together.
Das Team entwickelt eine neue App für den Kundenservice.
The team is developing a new app for customer service.