Concrete modular buildings, also called as pre-cast or pre-fabricated concrete buildings, are the next step to steel modular buildings. Concrete is considered to be a tougher and less elastic material than steel. Also, concrete is less resistant to expansion and contraction due to weather and more adhesive bonding. However, the most important factor in making concrete win over steel in modular building designs is that concrete can be made to look more appealing and can be given many more creative designs than steel.

Companies that manufacture concrete modular buildings design them according to a proper scrutiny of the site and the floor plan of the building. Each module is designed in a factory. The module consists of initially placing a railing, on which a steel grid is placed. In this a concrete foundation is poured, and the railings are removed. The next step consists of erecting the walls, with apertures for doors, windows, ventilation, etc. Lastly, the roof is placed. The unit is finished by giving it a desired coat of paint and other fixtures. Such units are separately made at the factory, which are transported by trucks to the site and assembled there. Single units can be joined together using cement and mortar.

Concrete is a base material for conventional construction. Hence, modular buildings made with concrete appear no different from traditional buildings. For this reason, concrete modular units are popular choices for adding to older buildings.

Today a vast number of school buildings, office buildings, church buildings and even residential buildings are modular concrete buildings. Several architects and engineers are studying specialization courses in modular building technology, so the craft is improving day by day. Contemporary concrete modular buildings are creative in design and much safer than their earlier counterparts.

The biggest pros of concrete modular buildings vis--vis traditional concrete constructions are that they can give the same quality and look with less investment of time and money. Another factor is that concrete modular buildings can be dismantled and relocated, unit by unit, to another place. Hence, this type of structure becomes ideal for temporary establishments and moving businesses.

The cons are that, if improperly built, the structure may have cracks which may cause leakage in the long run. This, in turn, would harbor the growth of mold and mildew.

Pre-cast concrete buildings are cheaper than conventional buildings; they can cause a reduction of about 30 to 40 percent in the total building costs. Most companies price them on a per-square-foot basis. Their charges may vary from $75 to $100, depending on their features and textures.