Wherever there is an income from leasing out of premises and collecting rent, normally such an income is to be treated as income from house property, in case provisions of Section 22 of the Act are satisfied with primary ingredient that the assessee is the owner of the said building or lands appurtenant thereto. Section 22 of the Act makes ‘annual value’ of such a property as income chargeable to tax under this head. How annual value is to be determined is provided in Section 23 of the Act. ‘Owner of the house property’ is defined in Section 27 of the Act which includes certain situations where a person not actually the owner shall be treated as deemed owner of a building or part thereof. In the present case, the appellant is held to be “deemed owner” of the property in question by virtue of Section 27(iiib) of the Act. On the other hand, under certain circumstances, where the income may have been derived from letting out of the premises, it can still be treated as business income if letting out of the premises itself is the business of the assessee