When I am Passing this value Real Estate Test from Excel Data source to Rest URL it converts space as below.
This is expected. Special characters used in a REST URL in SOAtest will be URL encoded.
%20 is the URL code for space.
Below is a site that you can see what codes different special characters will be converted to:
Just to double check though, this isn't causing this test to fail, is it?
Test is not failed but result validation though scripts failing as its a string comparison.
Before performing the string comparison you could use a script to URL encode or decode one of the strings.