买房，房子面积的大小是影响购房者决定的重要因素之一，也事关购房者利益。近年来，关于房屋面积的纠纷越来越多，有些不法开发商故弄玄虚，在提供的房屋面积数上大做文章。自测房屋面积，几乎是每个现房购买者的规定动作。可以使您的测量更精确，也减少了不必要的纠纷。

　　获取图纸

根据详细的住宅平面图测量和计算才能方便而准确。平面图中应包括住宅的主要数据有：各房间的轴线尺寸和外墙的总尺寸，即两道尺寸线，还有各房间的使用面积。大部分住户都在标准层，也就是中间层，所以测量和计算主要根据标准层图纸和面积。如果住宅所在楼层较为特殊，如底层、顶层，则要用所在楼层的图纸。为了测算一户面积，可以不对全楼的面积进行测算。这些图纸可以要求房地产开发商提供，如果开发商不愿意提供这些图纸，那么他交付的房屋面积就有可能有问题。

　　实地测量

对于标准层的住宅来说，由于房间的形状比较规则，测量起来一般不会有什么问题。对于顶层或者其他不规则房间，在测量的时候要根据套内使用面积的标准，注意把应该加上的面积加上，把应该剔除的面积剔除。

　　实地测量套内使用面积需要注意，为了保证测量的准确性，测量时要注意使测量位置距地面高1米左右。由于住宅交付之时，内墙上已经过抹面处理，抹面厚度一般为2厘米左右，因此房间内部测量所得到的尺寸，应该加上抹面厚度再计算。如果房屋已经装修完毕，则还要加上装修厚度才能计算出套内使用面积。

　　修正数据

　　在对使用面积的测算过程中，对房间内部测量所得到的尺寸，是房间轴线尺寸减去墙体厚度和抹面厚度的尺寸，不能作为面积中的尺寸。正确的使用面积数字是按轴线尺寸除去结构厚度尺寸的房间内部尺寸计算的。大多数情况下，轴线位于墙体的中间，中间两侧各为半个墙厚。如果有偏轴墙，可以通过前面提到的图纸查出来。

　　如果误差接近或超过20cm则可能有问题。测量出房间两个方向的内部尺寸，相乘即得房间使用面积。门窗洞口的面积不计入使用面积。

　　计算面积

　　将自家住宅与别家、公共部分的相接处沿轴线分开，自家轴线之间的总面积为住宅内的总建筑面积。其计算方法，一种是将总使用面积再加上各段墙体的结构面积；一种是直接计算自家轴线所围成的几何图形面积。但住宅内的总建筑面积在图纸中一般不标注，没有实质意义，仅供下一步计算整套住宅建筑面积使用。测量好套内使用面积后，要计算套内建筑面积还必须测量阳台的建筑面积。阳台建筑面积的测量方法基本上与使用面积的测量方法一样，但要注意区分不同类型的阳台。

　　有了房屋的套内使用面积和阳台建筑面积，再根据图纸所注明的墙体厚度，就可以计算整套住宅的套内建筑面积了。计算公式如下：套内建筑面积=套内使用面积+套内墙体面积+阳台建筑面积。

　　随着房地产市场的日渐成熟，人们对房屋质量的投诉已开始减少，而相应的对公用建筑面积分摊问题的争议有所增加，而且以群体形式起诉发展商的房地产案时有发生。房屋面积经有资质的面积测绘机构测绘后经房屋产权登记部门确认，就是房屋产权证上记载的面积。

Buy a house, the house is an area the size of the impact of home buyers an important factor in the decision, but also bears on the interests of home buyers. In recent years, on the housing area, more and more disputes, some unscrupulous developers trick, in the provision of housing area of a few big fuss. Self-housing area, almost every action the provisions of existing-home buyers. You can make your measurements more accurate, but also reduce unnecessary disputes.

Get Drawings

Of residential floor plans based on detailed measurements and calculations can be easily and accurately. Plan should include key data on housing are: the axis of the room size and the total size of the external walls, that is two sizes line, as well as the use of the room size. Most of the households are in the standard layer, which is the middle layer, the measurement and calculation of the main layer in accordance with standard drawings and area. If the house where the floor is more special, such as the bottom, top, then use the drawings where the floor. In order to measure an area the size of the whole building could not be measured. These drawings may be required to provide real estate developers, if developers do not want to provide these drawings, his delivery of the housing area, there may be a problem.

Field measurements

For standard residential floor, because the comparison rules the shape of the room, measure up and is generally not a problem. For the top-level or other irregular rooms, in the measurement when the floor area according to the standard kit, pay attention to the area should be added together to remove the area should be removed.

Field measurement kit to use an area that require attention in order to ensure measurement accuracy, measurements should pay attention to the measuring position about 1 m high from the ground. A time when the residential delivery, inside the walls have been wiped surface treatment, wiping surface thickness of 2 cm or so, so rooms are the size of the internal measurements, should be added a further calculation of the thickness of wiping. If the houses have been renovation work was completed, it must be added in order to calculate the thickness of the decoration comprising the use of space.

Revised data

In the area of measuring the use of the process, the internal measurements of the room are the size of the axis is the size of the room minus the thickness of the wall thickness and wipe the size, can not serve as an area in size. The correct number of usable area is based on the thickness of the axis size to remove the structure within the size of the room size calculation. In most cases, the axis is located in the middle of the wall, in the middle on each side of the half thickness of the wall. If there is off-axis wall, you can check out the previously mentioned drawings.

If the error close to or more than 20cm may be a problem. Measured in both directions within the room size, multiply the area of the room, use. Door and window openings are not included in the area of floor space.

Calculation Area

Housing and other family, his home, the public part of the phase at the axis along the separation between its own axis within the total area of the total residential construction area. The calculation methods, one is the total floor area plus sections of the structure of the wall area; One is the direct calculation of its own axis of the geometry of the surrounded area. But the house's total floor area of drawings generally are not marked, there is no real meaning, only the next set of calculations used for residential construction area. Measuring a good kit to use an area after the construction area to calculate the kit is also required to measure the balcony of the construction area. Balcony floor area of the measurement methods used basically the same as the area measurement method, but should pay attention to distinguish between different types of balconies.

With the use of house kit construction area and the balcony area, and then specified according to drawings of the wall thickness, we can calculate the full set of residential floor area of the kit. The formula is as follows: kit, comprising the use of floor area = area + wall area + balcony comprising a construction area.

With the maturation of the real estate market, it is the quality of housing complaints has begun to decrease, while the corresponding share of the public floor area has increased the controversy over the issue, but also with groups in the form of prosecution of the developer's real estate cases have occurred. The housing area is qualified, after mapping the area of mapping agencies by the Housing Department to confirm the registration of property rights, the housing ownership certificate recorded in the area.