Usable, floor and living area: what is the difference?

When selling an apartment or a house, the difference between usable area, floor area and living area matters. It is not just terminology. An incorrectly stated area can distort the property price, confuse the buyer and unnecessarily complicate negotiations and contract preparation.

The simplest way to understand it is this: floor area describes the size of a unit from a construction and legal perspective, usable area is used in real estate practice for practically usable spaces, and living area refers only to rooms intended for living, typically a living room, bedroom or children’s room.

When selling, I therefore recommend working not only with one number, but also with an explanation of what exactly the stated area includes. The buyer receives clear information and the seller avoids later misunderstandings.

Why area matters when selling a property

Area is one of the first details buyers use when comparing apartments, houses and recreational properties. They often use it to assess the price per square metre and compare the offer with similar properties in the area.

For an apartment in Jindřichův Hradec, Tábor, České Budějovice, Prague or Vysočina, a difference of just a few square metres can influence how the price is perceived. However, a larger number does not automatically mean a higher value. The layout, condition, floor level, lift, cellar, balcony, parking, land, technical condition of the building and location are also important.

A correctly described area helps set a realistic asking price and increases the credibility of the listing. If the information is unclear, buyers often ask whether the area includes a cellar, balcony, loggia, terrace or common areas of the building.

What is floor area?

For apartment units, floor area is assessed according to rules that include the floor plan area of all rooms in the apartment, including vertical structures inside the apartment, such as walls, columns, pillars or chimneys.

Simply put: the floor area of an apartment does not mean only the “free walking space” on the floor. It also includes structures inside the apartment. It is measured according to the inner face of the structures that enclose the apartment.

The floor area of an apartment therefore usually includes:

• rooms,
• kitchen or kitchenette,
• hallway,
• bathroom,
• toilet,
• storage room inside the apartment,
• internal partitions and other vertical structures inside the apartment.

By contrast, a balcony, loggia, terrace or cellar cubicle is usually assessed separately, depending on how it is listed in the documentation, owner’s declaration or land register.

When selling an apartment, it is therefore advisable to verify the floor area from documents, not only from an old listing or the owner’s estimate.

What is usable area?

Usable area is used in real estate practice for spaces that the owner or occupant can actually use. For apartments, it often means the sum of the areas of rooms inside the apartment, excluding balconies, loggias, terraces and cellars. For family houses, however, the term may be used more broadly and it is always necessary to specify what exactly is included.

Usable area is where most misunderstandings arise in property listings. Some people include a utility room, hallways or storage space. Others count only the main rooms. In a house, a garage, workshop, boiler room, attic or basement may also be relevant.

That is why, when selling, it is better to describe the areas more specifically. For example: “floor area of the apartment 72 m², loggia 6 m², cellar 4 m²”. This is clearer for the buyer than one large number without explanation.

What is living area?

Living area includes rooms intended for living. Typically, these are the living room, bedroom, children’s room, a study that meets the requirements for a habitable room, or a dining room.

Under current Czech building law, a habitable room is a part of an apartment intended for living that meets requirements for size, daylight, ventilation, heating and noise protection and has a floor area of at least 8 m². A kitchen is considered a habitable room if it has a floor area of at least 12 m². If the apartment consists of only one habitable room, it must have at least 16 m².

Bathrooms, toilets, hallways, storage rooms, cellars, balconies, loggias and terraces are not normally included in living area. These parts may still have a significant impact on market value, even if they are not living area.

Practical overview of the differences

Floor area is important mainly for apartment units and documentation. It helps define the size of the unit and is important when preparing the legal side of a sale.

Usable area is a practical real estate figure. It should show the buyer what space can actually be used. However, it is always necessary to state what has been included.

Living area refers only to rooms intended for living. It is useful when assessing the layout, habitability and comfort of a property, but on its own it does not describe the full value of the property.

Example for an apartment

Imagine a 3+1 apartment with the following parts:

• living room 20 m²,
• bedroom 14 m²,
• children’s room 12 m²,
• kitchen 10 m²,
• hallway 8 m²,
• bathroom 4 m²,
• toilet 1.5 m²,
• storage room 2 m²,
• loggia 5 m²,
• cellar 3 m².

The living area will mainly include the habitable rooms. A kitchen of 10 m² may not be counted as a habitable room because it does not reach 12 m². The hallway, bathroom, toilet and storage room are not living area.

The floor area of the apartment will include the rooms inside the apartment and the structures inside the unit according to the documentation. The loggia and cellar should be stated separately.

For a listing, the best approach is to write the information clearly: for example, “apartment with a floor area of 71.5 m², loggia 5 m² and cellar 3 m²”. The buyer immediately understands what is being sold and what belongs to the unit.

Example for a family house

For family houses, the situation is often more complicated. A house may include habitable rooms, a kitchen, bathrooms, hallways, utility rooms, a garage, cellar, attic, workshop, terrace and garden.

If a listing states only “usable area 180 m²”, the buyer may not know whether this includes a garage, cellar, boiler room or attic. This can lead to distrust or later pressure to reduce the price.

For a house, I therefore recommend dividing the areas, for example, into:

• residential part of the house,
• utility and storage spaces,
• garage,
• terrace,
• land,
• attic or cellar, if relevant.

Such a description is understandable and better shows the real value of the property.

What to watch out for in a listing

The biggest mistake is stating one number without explanation. The buyer may assume it is pure living area, while the seller has included a cellar, balcony or utility space.

Another common mistake is copying the area from an old listing, valuation report or estimate without checking it. Different documents may use different methods.

A third mistake is trying to make the area look larger. In the short term, the listing may attract more interest, but inaccuracies usually become clear during the viewing or document check. The result can be a loss of trust and pressure for a discount.

How to proceed before selling

Before selling, I recommend checking the available documents: title deed, owner’s declaration, floor plan, project documentation, occupancy approval documents, an older valuation report or documents from the building owners’ association.

If documents are missing or the figures contradict each other, it is better to verify the area before launching the listing. For more complex properties, a technician, designer or another specialist may help.

As a real estate agent, when preparing a sale I focus not only on the number itself, but also on how the areas are clearly presented to buyers. A correctly described property appears more trustworthy and reduces the risk of misunderstandings during price negotiations.

Does a balcony, terrace or cellar affect the price?

Yes, often it does. Even if a balcony, loggia, terrace or cellar is not counted in the same way as the internal area of an apartment, it may be very important to the buyer.

A loggia in a panel apartment building, a terrace in a new build, a cellar for a smaller apartment or a garage for a family house can significantly affect the attractiveness of the offer. Valuation should therefore not be based only on a mechanical calculation of square metres, but also on the practical usability of the individual parts.

When estimating market value, the property must be assessed as a whole: layout, condition, location, legal status, accessories, local demand and comparable sold or listed properties.

FAQ: common questions about property areas

What figure should I state when selling an apartment?

For an apartment, it is advisable to state the floor area of the unit according to the documentation and separately add the balcony, loggia, terrace, cellar or other accessories. This gives the buyer a clear and fair overview.

Is a balcony included in the floor area of an apartment?

A balcony is usually not counted as the internal floor area of an apartment. In a listing, it is advisable to state it separately, for example: “floor area of the apartment 65 m² + balcony 6 m²”.

Is usable area the same as floor area?

Not always. In common real estate practice, these terms are sometimes confused, but they should not be treated as automatically identical. Floor area has a specific legal meaning for apartment units, while usable area is used more practically and must be clearly explained.

Is a cellar included in usable area?

It depends on how the figure is used. For apartments, it is better to state the cellar separately. For houses, a cellar may be part of the total usable or auxiliary area, but it should always be clear that it is cellar space.

Why can the area differ between the land register, project documentation and listing?

Each document may have a different purpose and method. The area of a unit, living area and practically usable space may each be stated differently. Before selling, it is therefore advisable to compare the figures and explain them clearly in the listing.

Can an incorrectly stated area complicate a sale?

Yes. An inaccurate area can lead to buyer distrust, pressure for a discount or complications during contract preparation. Larger differences may also create legal or complaint-related issues.

Are you selling a property and unsure about the correct area?

If you are preparing to sell an apartment, house, recreational property or investment property, I recommend verifying the areas before launching the listing. It will help set the right price, prepare a convincing presentation and avoid unnecessary questions or disputes.

I will be happy to review the available documents with you, explain the differences between the individual types of area and prepare the property for sale so that the presentation is accurate, clear and trustworthy. I work mainly in South Bohemia, the Tábor, Jindřichův Hradec and České Budějovice areas, as well as in Prague, Vysočina and Central Bohemia.