No, Giorgi, it is a non-defining clause. It is just telling us something about the house.
Defining relative clause:
The house that we just drove past was sold for over a million pounds.
The house that you see in this photograph was sold for over a million pounds.
Non-defining relative clause:
This property was once part of a huge estate. Much of the surrounding land has been sold over the years. The house, which was once owned by our friend Bruce, was sold for over a million pounds.
The commas in Shereen �s example let us know which kind of clause it is.
Bruce