With the tide of information revolution, knowledge revolution and economic globalization, a large number of foreign-funded enterprises are pouring in, and with the continuous growth of local enterprises, the demand for office buildings is increasing. Office property is becoming more and more popular, confused and mature, and the rating standard of office property is more complicated. The words "Grade A", "5A" and "the fourth generation" are very attractive. This paper aims to explain the meaning of different rating standards from a rational point of view. First, "Grade A", "5A" and "Fourth Generation" are three concepts that define the grade of office buildings from different angles, and basically represent the basic direction of evaluating the grade of office buildings. "Grade A" evaluates the grade of office buildings from the perspective of comprehensive quality; "5A" is evaluated from the perspective of hardware configuration; The "fourth generation" set the standard from the perspective of office building development. The three evaluation methods have their own characteristics, and consumers are not clear about each evaluation method, which leads to conceptual confusion. Second, the "Grade A" standard is not the highest level. "Grade A office building" is a popular term, which was gradually introduced and popularized by foreign developers in the process of developing foreign-related office buildings. Office buildings can be divided into several grades according to their comprehensive quality, such as A, B and C. As far as China's office market is concerned, it is generally divided into high-grade properties (Grade A office buildings), middle-grade properties (Grade B office buildings) and low-grade properties (Grade C office buildings). And high-grade property can be subdivided into two parts: top-grade and Grade A office buildings. Top-level office buildings are in line with international office standards and classified into Grade A according to the current standards in the local market. The so-called Grade A office building mainly refers to the rating standard of four-star hotels or five-star hotels, which is a conventional title in the real estate industry. Because the office property in different markets is different, the classification standard of office buildings is usually based on the relative quality of each market. For example, some small cities do not have top office buildings and international office buildings. For megacities (such as Beijing, Shanghai and Shenzhen), besides the general consideration of building quality, we should also fully consider the factors of urban transportation and urban planning (CBD layout). Specifically, property grades and grade standards can be divided and defined as 1, top-class property (international office building) (1) building quality: the physical condition and quality of the building are first-class, and the building quality is excellent. The layout of the building is flexible and the utilization rate is high, reaching 70%; Covering a large area, the lobby and walkway are spacious, and the clear height from the raised floor to the ceiling is not less than 2.6 meters. ① Decoration standard: the fa? ade is decorated with high-grade international exterior walls such as marble exterior walls and glass curtain walls, and imported high-standard materials such as marble, aluminum plates and glass curtain walls are used; There is a spacious marble lobby and corridor; * * * Part of the ground should be marble, granite, high-grade floor tile or high-grade carpet, the wall should be marble or high-grade wallpaper or high-grade paint, there should be suspended ceiling, and the elevator room should be stainless steel and marble; The bathroom is equipped with imported famous brand sanitary wares, such as Coma, Kohler, American Standard and T0T0. ② Supporting facilities: There should be supporting business and living facilities, such as meeting rooms, post offices, banks, ticketing centers, staff dining rooms, special above-ground and underground parking lots, shops with enough parking spaces to meet daily life, restaurants and hotels suitable for business dining, lunch breaks or entertainment facilities, and other facilities such as parks, sports facilities and libraries. ③ Elevator system: good elevator system, advanced elevator facilities, and passenger and cargo partition. Generally there is an elevator every 4000 square meters, and the average waiting time is about 30 seconds. (4) Equipment standard: there should be famous brand central air conditioning, and the central air conditioning system is efficient; Have building automation; Have a safety alarm; There is comprehensive wiring. (2) Building scale: more than 50,000 square meters. (3) Customer settlement: tenant portfolio of well-known foreign companies; Well-known multinational, domestic and foreign large companies and consortia.

(4) Property services: managed by experienced and first-class well-known brand companies, equipped with practical computer property management software, computerized office property management, establishment of office management information system, connection and unified management of office property systems, and 24-hour maintenance and security services.

(5) Convenient transportation: the location is important, the accessibility is excellent, and it is close to more than two main roads. There are a variety of means of transportation and subway direct access.

(6) Location: Located in the core area of the main business district. (7) Intelligentization: 3a ~ 5a (8) Developer background: rich experience and abundant funds. In the early stage of project development, they have financial flexibility and rich experience in large-scale real estate investment. These developers are overseas companies such as the United States, Malaysia, Hong Kong and South Korea, or high-quality state-owned enterprises that have successfully operated overseas.

Building quality of high-grade property (Grade A office building) (1): the physical conditions of the building are excellent, and the building quality meets or exceeds the requirements of relevant building regulations or codes; Its profitability is comparable to that of new office buildings. ① Decoration standard: the facade is made of marble, advanced ceramic tile, aluminum plate, glass curtain wall and other materials; There is a lobby, and the floor of the lobby should be marble, granite, natural stone and so on. The wall should be made of marble, granite or high-grade wallpaper, with suspended ceiling and columns covered with marble, stainless steel and other materials; * * * Part of the ground should be marble, granite, high-grade floor tiles or high-grade carpets, and the wall should be high-grade wallpaper or high-grade paint (such as Nippon paint). ), there should be a ceiling, and the elevator room should have stainless steel, marble or wooden doors; The bathroom is equipped with imported famous brand sanitary wares, such as Koma, Kohler, American Standard, TOT0, etc. ② Supporting facilities: There should be supporting business and living facilities, such as meeting rooms, post offices, banks, ticketing centers and staff canteens. Special underground parking lot with sufficient parking spaces. ③ Equipment standard: famous brand central air conditioner; Have building automation; Have a safety alarm; There is comprehensive wiring. (2) Building scale:1-50,000 square meters.

(3) Customer existence: there are well-known large companies at home and abroad, and most of the customers are engaged in R&D, technical services, e-commerce or well-known brand agents. (4) Property services: managed by well-known companies with rich experience. Perfect property management services include 24-hour maintenance and security services.

(5) Convenient transportation: There are various means of transportation directly. (6) Location: Located in the main business district or sub-business district. (7) Intelligence: 3A or above.

Building quality of mid-range property (Grade B office building) (1): The physical condition of the building is good, and the building quality meets the requirements of relevant building regulations or codes; However, the function of the building is not the most advanced (influenced by outdated functions), and there is natural wear and tear, and its profitability is lower than that of the newly completed similar buildings. ① Decoration standard: the facade is ceramic tile or ceramic tile; There is a lobby, the lobby floor is ceramic tile, the wall is ceramic tile or high-grade paint, and there is a ceiling; * * * Some floors are floor tiles or mid-range carpets, and the walls are whitewashed; The bathroom adopts joint venture or domestic medium and high-grade sanitary ware. ② Supporting facilities: there is a special underground parking lot. ③ Equipment standard: central air conditioning system; No building automation; Have a safety alarm; No integrated wiring. (2) Building scale: unlimited. (3) Customer presence: Most customers are domestic small and medium-sized companies, engaged in sales agents and product research and development. (4) Property services: provided by property management companies. (5) Convenient transportation: there are transportation lines to reach, and the transportation is convenient. (6) Location: Sub-capital or better urban location.

Low-grade property (Grade C office building) (1) building quality: the property has been used for a long time, and the building cannot meet the requirements of new building regulations or codes in some aspects; The building has obvious physical wear and functional obsolescence, but it can still meet the needs of low-income tenants. ① Decoration standard: facade painting; No lobby; * * * Part of the ground is ordinary floor tiles or terrazzo; The toilet adopts ordinary household sanitary ware. ② Supporting facilities: None. ③ Equipment standard: split air conditioner; No building automation; No safety alarm; No integrated wiring.

(2) Scale: unlimited. (3) Customer existence: Customers are basically small private enterprises engaged in simple sales business. (4) Property services: there may be general property services such as sanitation, receiving and dispatching, and duty. (5) Convenient transportation: there are traffic lines to reach. (6) Location: general city location.