Filtering Help

I m making a real estate website where i can display all the available properties for sale, renting and etc.

So created using dataassist where all the data is stored in database & retrieved on the result pages..

So i need help in filtering. I kinda find it little difficult to do this.
If possible please help me in detail.

I got 1 DB & in that there are 3tables..

*table1 is Properties which contains name of builder/company name, building/property name, locations,min max price, imgs etcetc..

*table2 is builderslist which contains list of builders name

*table3 is locations list which contains List of locations

while inserting record ie. properties, the builder name is taken from table1 (buildername) and location from locationlist table2 from DB..
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So now lets say a user is checking a property of "X" company in property_details page. So now i want a to show users other properties of same builder in that page may be like 1 or more properties..

All required files are attached..

Thank You