The Thailand Condominium Act defines a condominium as a building that can be separated into units for individual ownership and which include personal and common properties (land on which the building sits, hallways, elevators, etc.). The Condominium Acts does not specify in any detail the specific requirements necessary in order for it to be identified as a condominium. As long as the building is able to hold ownership separately according to the area, whereby each area consists of private ownership in the property and joint ownership in the common property. There are no specifications outlining height or space requirements, nor are there any specifications outlining the minimum amount of individual units necessary within the building under the Condominium Act.
All building in Thailand must comply with zoning regulations under the City Planning Act and Building Control Act. A local regulation issued under the building Control Act could for example specify 'in the x region a person shall prohibit to construct any other building except a single-one level building which its height is not more than 6 meters and the total building area is not more than 75 square meters and there is empty space around the building not less than 75% of the land that is allowed to construct the building'. A building permit for a condo would not be allowed under the Building Control Act.
A condominium in Thailand can be a flat or horizontal building structure or vertical high rise building structure. Horizontal condos or a 'Villa Condominium' are as such not defined in the Condominium Act. Technically a condominium can be a group of attached or low rise buildings. A villa condominium under the Condominium Act is based on a decision by the government's legislative advisory but must obtain a condominium license. The legality of this type of (horizontal) condominiums under the Condominium Act is controversial and licensing is usually refused.