Providing Residential and Commercial Real Estate Appraisals, Appraisal Reviews, Valuations, Inspections, and Construction Draw Inspections for North Texas. The DW Slater Company has been providing real estate appraisals for over 20 years. We have expertise in agricultural, waterfront, REO, relocations and rural properties. We provide Commercial Appraisals for the North Texas Region. We also provide Review Appraisal services. It is our mission to provide quality, reliable appraisal services.