Section 108A(2) in Karnataka Municipal Corporations Act, 1976
(2)The property tax shall be levied by the Bruhath Bangalore Mahanagara Palike by resolution passed as specified in section 106 at such percentage not being less than 20 percent and not more than 25 percent of the taxable annual value of a building, vacant land or both. The taxable annual value of a building, vacant land or both shall be calculated by multiplying the corresponding "unit area value" with the total built-up area of a building, vacant land or both for ten months, minus depreciation at such rate, as may be prescribed, depending on the age of a building.Explanation. - For the purpose of this section, "Unit Area Value" means an average rate of expected returns from the property per sq.ft., per month determined by the Commissioner, Bruhath Bangalore Mahanagara Palike on the basis of the average market rate determined through mass appraisal method or real estate market information or any other reliable source or combination of these sources that he may considers it as sufficient and reasonable having regard to the location, type of construction of the building, nature of use to which the vacant land or building is put, area of the vacant land, built-up area of the building, age of the building, parking area of vehicles in non-residential building where it is charged and such other criteria as may be prescribed. Different rates may be determined for different area or street by classifying into zones, different nature of use to which the vacant land or building is put and for different class of buildings and vacant lands:Provided that no such "unit area value" shall come into force unless it is previously published in the official Gazette for the information of the persons likely to be affected and an opportunity is provided to make representation or suggestions, if any, in this regard:Provided further that the land appurtenant to a building to the extent not exceeding thrice the area occupied by such building shall be exempted from the property tax:Provided also that subject to such condition and in such circumstances as may be notified, the Commissioner, Bruhath Bangalore Mahanagara Palike, may, in lieu of the tax under sub-section (2), fix any lumpsum amount as annual tax, irrespective of zonal classification, in respect of,-(a)a built-up area having less than 300 sq.ft., in a slum area declared as such by the Karnataka Slum Clearance Board or the Commissioner, Bruhath Bangalore Mahanagara Palike; and(b)an area used as parking area in a non-residential building and being charged for its use by the owner or the occupier.(c)any other class of building or structure as he deems fit.