die Baufirma
construction company
A company that specializes in constructing buildings, roads, or other structures.
Wir haben eine lokale Baufirma mit dem Bau unseres Hauses beauftragt.
We hired a local construction company to build our house.

construction company
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construction company
A company that specializes in constructing buildings, roads, or other structures.
Wir haben eine lokale Baufirma mit dem Bau unseres Hauses beauftragt.
We hired a local construction company to build our house.

The word is made up of 'Bau' (construction/building) and 'Firma' (company). 'Bau' comes from the verb 'bauen' (to build). A Baufirma is therefore literally a company that builds.
Die Baufirma beginnt nächste Woche mit den Arbeiten.
The construction company starts work next week.
The component 'Bau-' is very productive and marks words related to the topic of construction. If you see 'Bau-', the word probably has something to do with building, e.g. 'Baustelle' (construction site), 'Bauarbeiter' (construction worker), or 'Bauplan' (building plan).
Auf der Baustelle arbeiten viele Menschen von der Baufirma.
Many people from the construction company work on the construction site.
Common verbs used with 'Baufirma' are 'eine Baufirma beauftragen' (to hire a construction company), 'eine Baufirma gründen' (to found a construction company), or 'für eine Baufirma arbeiten' (to work for a construction company).
Es war schwer, eine gute Baufirma für die Renovierung zu finden.
It was difficult to find a good construction company for the renovation.
construction company
'das Bauunternehmen' and 'die Baufirma' mean almost the same thing in many situations: a company that builds buildings, roads, or other structures. 'Baufirma' often sounds a little simpler and more direct in everyday speech. 'Bauunternehmen' sounds somewhat more formal and fits well in contracts, news reports, or official texts. In normal conversations, you can usually use both words without much difference.

Nach dem Sturm hat die Familie eine Baufirma für das beschädigte Dach angerufen.
After the storm, the family called a construction company about the damaged roof.
Das Bauunternehmen plant den Neubau der Schule zusammen mit der Stadt.
The construction company is planning the new school building together with the city.