건축업자 in English:

I'm going to work as a builder with my father.

We asked a builder to build a new garage for us.

A builder builds houses.

Carl is a builder and he works very hard.

He is the best builder.

We don't employ builders.

Mr Brown contracted with the builder for a new house.

You should have your house built by a trustworthy builder.

He has carried on his business as a builder for many years.