The office building maintenance fund shall be deposited with the special housing maintenance fund according to the construction area of its own house. The amount of the first special maintenance fund per square meter of building area is 45 yuan for multi-storey residential buildings, 78 yuan for small high-rise residential buildings and 90 yuan for high-rise residential buildings. The maintenance fund for office buildings comes from two parts: first, the units selling houses are extracted from the sales funds according to a certain proportion. In principle, multi-storey houses should not be less than 20% of the sales funds, and high-rise houses should not be less than 30% of the sales funds. This part of the funds belongs to the selling unit. Second, the buyers pay the maintenance fund to the selling unit according to the proportion of 2% of the purchase price. The maintenance fund collected by the selling unit belongs to all owners and need not be included in the residential sales income. Because office buildings are higher than residential buildings and rich in content, they are generally higher than residential maintenance funds. 3-5% of the house price depends on the level of the office building.