Coldwell Banker Residential Brokerage can help you find Mason Elementary School, Mason, TX, Castell, TX homes for sale. Refine your Mason Elementary School, Mason, TX real estate search results by price, property type, bedrooms, baths and other features. Need more information? View Coldwell Banker Residential Brokerage Castell real estate agents or offices and let us help you find the perfect property. We also have area guides that show more information about properties in Castell, TX.