HOUSE PROPERTY

Self Occupied House Property

A self Occupied property is one which is used by the person for his own residential purpose. If a person has occupied more than one property for his residential purpose then only one house is treated as self occupied and others are treated as "Deemed to be let out". If a person uses his property for carrying on the business and profession then income from such property is not chargeable to tax under House Property.

Let Out House Property

A property which is given by the owner to the tenant for some consideration is treated as a let out property . 

For more details read

https://www.quora.com/in/What-is-the-difference-between-self-occupied-and-let-out-house-property