The Typology of a House serves to designate the number of rooms in a house, as well as the structure and division of areas. In other words, "T" for tiplogy and "1,2,3,4" is the number of rooms.

What are rooms?

Assoalhada is the name created to describe the division of a house that is used for sleeping, whose floor usually had wooden floors and hence the origin of the term. That is why the remaining divisions: rooms, kitchens, bathrooms, storage spaces, do not count for the purposes of the T designation. E.g. T3 is the term used to designate a house with 3 bedrooms and a living room.

What does a T0, T1, T2, T3, T4, T5 or T6 mean?

Typologies can be, in the case of an apartment; T1 (1 bedroom), T2 (2 bedroom), T3 ( 3 bedroom), T4 (4 bedroom), T5 (5 bedroom), etc. T0 also called "studio" is used to refer to a house that does not have any rooms, that is, it only has a living room, kitchen and toilet.

The designation T2 + 1 can also be found, the " +1" being used to indicate one more division (which can be an annex (eg a sunroom), the basement, or an attic that has been converted into a bedroom.

On the other hand, it is common to use the corresponding designation V1 , V2 , V3 , V4 , etc. which means the same as T1, T2, T3, T4 , etc., and this terminology is associated with the designation - nowadays less used - V sale (or houses). This designation is still used, more by professionals in engineering and projects than by professionals linked to the real estate industry, who use the terminology T (n) whether it is apartments or houses (villas).

What the legislation says about Housing Typology

Everything indicates that the designation T (n) mentioned originates from the General Regulation of Urban Buildings Decree-Law No. 38382, of 7 August 1951, which meanwhile underwent a revision through Decree-Law No. 650/75 of 1975 . Here we can find the following reference:

5.The type of fire is defined by the number of bedrooms, and for its identification the symbol T (index x) is used, where x represents the number of bedrooms.

Further on (Art. 66-1) we find a table that helps to understand the restrictions imposed on housing compartments, which cannot be less in number and area than those indicated in the following table:

  Number of compartments and fire type
  2 3 4 5 6 7 8   More than 8
  T0 T1 T2 T3 T4 T5 T6   Tn> 6
Minimum Gross Area (m2) 35 52 72 91 105 122 134
  Areas in meterssquares
Double room - 10,5 10,5 10.5 10,5 10,5 10.5 10.5
Double room - -- 9- 9 9 9 9 } Remaining 9 m rooms
Double room - -- - 9 9 9 9
Double room - - - - - 9 9
Simple room -     - 6,5 6.5 6.5 6.5
Simple room -     - - - 6.5 6.5
Living room 10 10 12 12 12 16 16 16
Kitchen 6 6 6 6 6 6 6 6
Mandatory area supplement 6 4 6 8 8 8 10 (x + 4) m2
(x = number of rooms)

Other types / designations of housing

In addition to the reference to the number of rooms, there are other terminologies used to classify a property and designate the type of housing, such as:

Floor House

we are usually talking about a house (not divided in the land register) in which the different floors have independent entrances , allowing them to be inhabited by more than one family, one per floor. Usually we are talking about a house with two floors, in which one of the houses is located on the ground floor and the other on the 1st floor, with independent access made through an external staircase to the property;


This designation is used for a house that is divided into two floors , with an interior staircase connecting them. It is mainly used for apartments, since the houses already have this characteristic;


As the name indicates, the property is divided into 3 floors ;


Designation used for the apartments that occupy the top floor of the building . They are highly valued fractions because, in addition to occupying the highest position, often allowing a clear view, they have no neighbors above their floor;

Detached or Single Family Home

They are designations used to describe a house whose implantation polygon has land all around it, that is, the building does not have any walls glued to other neighboring properties.

Terraced House

This designation applies to a house built side by side with two other houses , both of which share the side gables;

Semi-Detached House

Designation for a house built side by side with another house . They share a lateral gable;


The term "loft" is a term of Anglo-Saxon origin and designates a type of housing disseminated from the 1950s onwards, which combines a style of design and life ("Loft Living"), with decoration and concept very own housing. It was born in urban areas with a typically industrial matrix, and the property is characterized by a double height ceiling and decorative references of industrial style .They are usually adapted from barns, warehouses or other large structures, with few divisions and are characterized by:

  • A very high ceiling, sometimes with a mezzanine floor;
  • Large windows that offer indoor environments with lots of lighting and visibility to the outside;
  • Large open-space environments , with few divisions, where normally only the room (s) have some privacy, or not, and the master bedroom is often located on the mezzanine floor;
  • Rustic style decoration with reference to industrial elements such as unplastered bricks, cement floors, exposed aluminum tubing, etc., etc.

This type of housing started to be used more by artists and professionals, but today its concept has been integrated into the rest of the urban fabric and is used successfully in luxury homes in many cities.

Updated on: 
16. September 2019
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