State Category ID Texas State Codes Description A1 Real, Residential, Single-Family A2 Real, Residential, Mobile Homes B1 Real, Residential, Multi-Family B2 Real, Residential, Two-Family B3 Real, Residential, Three-Family B4 Real, Residential, Four- or More-Family C1 Real, Vacant Lots/Tracts C2 Real, Vacant Commercial C3 Real, Vacant D1 Real, Qualified Agricultural Land D2 Real, Unqualified Agricultural Land E1 Real, Farm & Ranch Improved F1 Real, Commercial F2 Real, Industrial J1 Real & Tangible Personal, Utility Water J2 Gas Companies J3 Electric Companies J4 Telephone Companies J5 Railroads J6 Pipelines O1 Inventory PT Subdivision Header T Temporary U0 Unknown X0 Primarily Charitable Organization X1 Governmental Exempt X2 Charitable Exempt X3 Religious Exempt X4 Cemetery Exempt X5 Private School Exempt X6 Youth Development Exempt X7 Historical Exempt X8 Miscellaneous Exempt X9 Low-Moderate Income Housing