Unfortunately, I cannot recommend anyone in your area.
But for your case, simple building structure, you should easily find a company.
I would first clarify with the building authority:
Is it allowed to build windows on the west side or is densification planned and is your house going to be extended later?
Is it allowed to attach to the existing row garage on the west side (costs for the plot at the municipality?) or in your case is the garage to be built on the property?
Do your parents have a basement?
Just search the internet for end terraced house / semi-detached house in your desired dimensions. For your floor plan planning.