Legal analysis: When selling commercial housing, the buyer and the seller should sign a house maintenance fund payment agreement, and the buyer should pay the house maintenance fund to the seller according to the proportion of 2-3% of the purchase price. The maintenance fund collected by the selling unit belongs to all owners and is not included in the residential sales income. The current deposit standard of the first special maintenance fund is: 9 0 yuan /m2 for high-rise buildings (including multi-storey buildings with elevators) and 5 0 yuan /m2 for multi-storey buildings (including villas).

Legal basis: Article 40 of the Regulations on Quality Management of Construction Projects Under normal use conditions, the minimum warranty period of construction projects is:

1. The infrastructure engineering, foundation engineering and main structure engineering of the building are the reasonable service life of the project specified in the design documents;

2, roofing waterproof project, bathroom, room and exterior wall waterproof requirements, for 5 years;

3. The heating and cooling system consists of two heating periods and cooling periods;

4, electrical pipelines, water supply and drainage pipelines, equipment installation and decoration engineering, for 2 years;

5. The warranty period of other projects shall be agreed by the Employer and the Contractor;

6. The warranty period of the construction project shall be calculated from the date when the project is completed and accepted.