1. Public parts of buildings, such as halls, corridors, elevators, stairs, halls, etc.

2. Public facilities, such as greening, swimming pool, gym, meeting room and parking lot.

3 property management, security, cleaning and other public service facilities.

Pay special attention to the following questions before buying a house:

1. Calculation method of pool area: Different developers may adopt different calculation methods, and buyers need to know clearly.

2. Proportion of pool area: Property buyers need to know the ratio of pool area to private area in order to determine their actual use area.

3. The right to use the pool area: property buyers need to know the ownership of the pool area to determine their rights and interests.

4. Maintenance cost of pool area: property buyers need to know who will bear the maintenance cost of pool area to determine their economic burden.

5. Management of pool area: Property buyers need to know the management of pool area to decide their living environment and quality of life.

6. Provisions on the use of pool area: Property buyers need to understand the provisions on the use of pool area in order to comply with relevant regulations and avoid disputes caused by illegal use.

7. Changes in pool area: Buyers need to know the changes in pool area to determine whether their rights and interests will be affected.

8. Evaluation criteria of pool area: Buyers need to know the evaluation criteria of pool area in order to determine the value of pool area in future transactions. In short, property buyers need to carefully understand the relevant situation of the pool area when purchasing real estate, so as to protect their rights and interests.