Data Mining Interval prediction

Hi, Not sure if this the right place for my question, but if not, then pointers to right forum will be helpful.<p>I have some real estate data and would like to predict property value given its attributes (area, bedrooms, etc) using locally weighted regression. I would also like to associate a confidence value with my prediction. Do I need to use Bayesian/probabilistic regression to achieve this? Can anyone point me to any research papers/tutorials explaining this technique?<p>Thanks.