The Constructor

Minimum Height and Size Standards for Rooms in Buildings

Minimum height and size standards for rooms

Minimum heights and size standards for rooms ensures that there is good ventilation, lights and comfortable living inside the room. Height and size standards for rooms varies from one country to another and is mostly based on the preference of clients to meet their demand.

However, in the absence of controls, developers (both public and private sector) tend to reduce the size of dwellings being developed whilst trying to avoid any reduction in value. Added to that, established minimum height and size standards allows disciplined and systematic growth of buildings and towns, and provide proper utilization of space.

Height Regulation for Rooms

1. Habitable Rooms

2. Bedroom Height Restrictions

3. Bathrooms, water closets and stores

4. Kitchen

5. Ledge

It shall have a minimum head room of 2.2m.

6. Hallways

Minimum height should be 2.1 m

Fig.1: Height of Rooms

Minimum Standard Sizes of Rooms

1. Habitable Rooms

2. Dining room

3. Primary Bedrooms

4. Secondary Bedrooms

5. Kitchen

6. Bathrooms and water closets

  1. The size of bathroom should not be less than 1.5m x 1.2m or 1.8 m2.
  2. If it is combined with water closet, its floor area should not be less than 2.8 m2.
  3. the minimum floor area of a water closet should be 1.1 m2.

7. Ledge

  1. A ledge in a habitable room shall not cover more than 25% of the floor area of the floor on which it is constructed
  2. It should not interfere with the ventilation of the room under any circumstances.

8. Hallways

Hallways shall have a width of at least 860 mm except where the overall width of the building is less than 4.3 m, and this may be reduced to 710 mm

9. Mezzanine floor

The minimum size of a mezzanine floor, if it is used as a living room, should not be less than 9.5m2.

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