How to calculate the area of an apartment
In recent years, as the real estate market continues to heat up, home buyers have paid more and more attention to the calculation method of apartment area. The area inside the house is directly related to the actual usable space of the house and the cost of purchasing a house, so it is important to understand how it is calculated. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the calculation method of the internal area of an apartment, and provide structured data for reference.
1. What is the inner area?

The area within the suite refers to the actual usable area of the house, excluding shared areas (such as stairs, elevators, corridors, etc.). It is one of the indicators that home buyers are most concerned about and directly affects the living experience and home value.
| area type | Contains content | Does not contain content |
|---|---|---|
| Building area within the suite | The usable area in the suite, the wall area in the suite, and the balcony area in the suite | Pool area |
| Useable area inside the suite | Actual spaces such as bedrooms, living rooms, kitchens, and bathrooms | Walls, balconies |
2. Calculation method of inner area
According to the "Rules for Calculation of Commercial Housing Sales Area and Apportionment of Public Building Area", the calculation formula for the area within the apartment is as follows:
| Calculation project | Calculation formula | Description |
|---|---|---|
| Building area within the suite | Usable area in the suite + wall area in the suite + balcony building area | Wall area includes shared walls and non-shared walls |
| Useable area inside the suite | The sum of the area used by each functional space | Calculated based on interior wall lines |
| Inner wall area | Horizontal projected area of shared walls × 1/2 + horizontal projected area of non-shared walls | A shared wall refers to a wall shared with neighbors |
| Balcony construction area | Enclosed balconies are calculated based on the full area, and unenclosed balconies are calculated based on 1/2 area. | Policies may vary slightly from place to place |
3. Analysis of recent hot cases
In the past 10 days, home buyers in many cities have sparked heated discussions over the calculation of apartment area. Here are a few typical cases:
| city | Case description | Involving area difference |
|---|---|---|
| Beijing | The internal area of a certain real estate promotion package is 80 square meters, but the actual measurement is only 72 square meters. | 8㎡ |
| Shanghai | The purchase contract does not specify how to calculate the balcony area | About 3-5㎡ difference |
| Guangzhou | The developer counts the equipment platform into the housing area | About 2㎡ |
4. How to avoid area disputes
1.Check the house purchase contract carefully: The contract should clearly indicate the specific values and calculation methods of the inner area and shared area.
2.Field measurement: When closing the house, you can ask a professional agency to measure it to confirm whether the actual area is consistent with the contract.
3.Understand local policies: Different cities may have different regulations on the area calculation of special structures such as balconies and bay windows.
4.Keep evidence: Save all promotional materials provided by the developer as a basis for rights protection.
5. Expert advice
Real estate experts remind that buyers should pay special attention to the following points before signing a contract:
| Things to note | Detailed description |
|---|---|
| Area difference processing | The contract should stipulate the handling method when the area error exceeds 3%. |
| Conceptual distinction | Clearly distinguish between building area, apartment area and usable area |
| Measuring mechanism | A qualified measuring agency should be specified in the contract |
From the above analysis, it can be seen that it is crucial for home buyers to understand the calculation method of the apartment area. Recent cases of area disputes in many cities have also warned us that we must remain vigilant and safeguard our own rights and interests during the home purchase process. I hope the structured data and detailed analysis in this article can help you better understand how the area of an apartment is calculated and make a wise purchase decision.
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