It might be best to use the svn:ignore property to ignore the build directory rather than moving it outside your project folder. The settings listed above will only work on your local machine as your computer name is hard-coded into the value. By taking advantage of svn:ignore you’re able to build to the original location but ignore any files within that directory. This will allow your projects to be easily built on different machines without having to change settings.

http://durak.org/sean/pubs/software/version-control-with-subversion-1.6/svn.advanced.props.special.ignore.html

Cheers,
Dustin