According to Circular No. 03/2016/TT-BXD on construction classification, based on the load-bearing structure of the construction to classify, a level 4 house is defined as a house with a construction height of 1 floor or less and they are built on an area of less than 1,000 m2.
With the development of the construction industry, there are more and more unique and innovative models of level 4 houses. Let's refer to some of the following models:

The Japanese-roofed level 4 house is a simple design with high aesthetics. The roof is built with small planks placed alternately, covered by many layers of tiles. (Photo: NoithatViet)

Thai-roofed level 4 houses have been very popular in recent years. And in 2023, this design is still hot. The advantages of this house model are luxury, cool in the summer, good moisture resistance and suitable for Vietnam's tropical climate. (Photo: Nhaongay)

Nowadays, Thai-roofed level 4 houses are no longer dependent on the traditional framework. Instead, it is a harmonious combination of modern and traditional architecture in the design of the roof style and color. (Photo: Archdaily)

The 4-level house with mezzanine has the advantage of simple architecture, reasonable construction cost and especially helps to cheat the usable area. This house model is suitable for small areas, homeowners want to have more living space. (Photo: Nhaongay)

A single-storey house with a sloping roof is considered an ideal choice for homeowners who love innovation. This type of house has an unbalanced roof system, designed to be sloping on one side or both sides or a combination of a flat roof and a sloping roof. (Photo: Nhaongay)

Nowadays, flat-roofed level 4 houses are often built with reinforced concrete as the main material, which has good load-bearing capacity and high durability. Therefore, the lifespan of flat-roofed level 4 houses is rated higher than many other design models. (Photo: Nhaongay)

Single-storey houses with gardens will become increasingly popular. This is an ideal house model in suburban areas or places with large areas. This design is highly appreciated by experts for its simple, sophisticated beauty and closeness to nature. In particular, single-storey houses with gardens can be designed in many different styles from European to classical, neoclassical or modern. (Photo: Sanvuonadong)

L-shaped houses are no longer new but never out of fashion. This design helps to take advantage of the area to make a garden, parking area or resting area. This type of house usually has two bedrooms on either side of the living room without affecting any other rooms. (Photo: Arcviet)

The European-style level 4 house model shows the charm and luxury from the unique architecture. This type of house often has a relatively large interior floor, suitable for the use of many families. (Photo: KientrucRoman)
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