Choosing between a single-storey and a two-storey house affects much more than the external appearance of the property. It influences how the plot is used, the layout, accessibility, privacy, cost and the relationship with the garden. That is why the right choice is not about deciding which option is better in general, but which one best suits the site, the needs of the people who will live there and how the house is expected to be used over the coming years.
At Viñas Constructora, we approach bespoke homes from this broader perspective. The number of floors should be a consequence of the project, not a constraint decided in advance. Two houses with the same floor area may require completely different solutions if the slope, orientation, views, planning regulations or family priorities are different.
Single-storey vs two-storey house: the main differences
A single-storey house places all rooms on the same level. This simplifies circulation and makes it easier for bedrooms, the living room, kitchen and work areas to connect directly with the outdoors. In return, the house requires a larger footprint on the plot to achieve a similar amount of usable floor space.
A two-storey house distributes the programme vertically. It can occupy less land and makes it easier to separate different uses, for example by placing the communal areas downstairs and the bedrooms upstairs. However, it introduces the staircase as a permanent circulation element and requires greater consideration of how the home will function at different stages of life.
| Aspect | Single-storey house | Two-storey house |
|---|---|---|
| Accessibility | Very convenient, with no stairs | Requires movement between floors |
| Plot footprint | Larger | Smaller for a similar floor area |
| Connection with the garden | More direct from different rooms | Mainly linked to the ground floor |
| Separation of uses | Depends more heavily on good horizontal zoning | Allows different functions to be separated by floor |
| Privacy | Must be resolved through layout and orientation | Can be easier to achieve between daytime and sleeping areas |
| Views | Determined by the level of the site | An upper floor can create new viewpoints |
| Future adaptability | Easier when the entire home is accessible | It is advisable to plan flexible uses on the ground floor |
This comparison is a useful starting point, but none of these factors should be considered in isolation. A generous single-storey home may work exceptionally well on one plot and make little sense on another only a few kilometres away.
When does a single-storey house make sense?
A single-storey home often works particularly well when the plot is large enough and the topography is favourable. By removing stairs, all the main spaces are connected through simple, practical routes, something that is valuable both in everyday life and as mobility needs change over time.
It also makes it possible to create a particularly strong relationship between the architecture and the landscape. The living room, kitchen and bedrooms can each have their own connection to terraces, patios or the garden, provided the layout is carefully considered. To explore the architectural possibilities of this typology in more depth, our guide to single-storey house designs looks at different approaches, from contemporary compositions to Mediterranean-inspired solutions.
Greater comfort and a home designed for the future
Having no steps between the main areas makes movement easier for children, older people and anyone with reduced mobility, but the benefit goes beyond these situations. Avoiding constant movement between floors makes everyday use more fluid: bringing shopping into the kitchen, moving between bedrooms and living spaces or going outside becomes more straightforward.
This feature also makes it easier to design a home with the long term in mind. A house can meet the needs of a young family and continue to work decades later without major alterations. Designing for different stages of life avoids having to correct structural decisions later on, when changes can be difficult or expensive.
A stronger connection between indoors and outdoors
When all rooms are close to garden level, it becomes easier to extend the interiors through porches, courtyards and terraces. The house can open onto the outdoors from several points instead of concentrating that relationship around the ground-floor living room.
That does not mean that filling every façade with large windows is necessarily the right approach. The position of each opening should respond to sunlight, views, privacy and climate. At Viñas, we work on the orientation of the house together with the floor plan because opening the home to its surroundings only works when each façade is carefully designed.
The limitation: it requires more land
To accommodate a given number of bedrooms, communal spaces, a home office and service areas on a single level, the entire programme has to spread horizontally. The available plot area and maximum permitted site coverage can quickly limit this option, even when the site appears large at first glance.
A very extensive single-storey layout can also create long internal routes or central areas with less natural light if the geometry is not resolved properly. Courtyards, L-shaped plans or fragmented volumes can help, but they need a clear purpose. A single-storey house works best when its horizontal character is deliberately designed rather than simply stretched out.
When should you choose a two-storey house?
Building on two levels makes it possible to concentrate the same floor area within a smaller footprint. This can be especially useful when the aim is to preserve a significant part of the plot for a garden, swimming pool, terraces or access areas. Building upwards can provide more interior space without consuming as much outdoor space.
Vertical separation can also become a useful tool for organising domestic life. A common layout places the living room, kitchen and dining area on the ground floor and reserves the upper floor for bedrooms. This is not the only possibility: in a bespoke house, each level should be organised according to how the home will actually be used rather than by automatically following a conventional formula.
Greater separation between daytime and sleeping areas
Dividing functions between levels can provide greater privacy, particularly in family homes where several activities take place at the same time. While the ground floor maintains an active relationship with the kitchen, garden and guests, the upper floor can create a more independent sleeping area.
This arrangement can also reserve the upper level for spaces that benefit most from particular views or from being set further away from the street. On plots with especially attractive surroundings, a second floor can completely change the visual relationship between the house and the landscape.
A useful solution for smaller or sloping plots
When the available site coverage is limited, building upwards may be the most sensible way to achieve the required floor area without sacrificing the entire outdoor space. But plot size is not the only factor. Its shape, setbacks and local planning regulations can be even more decisive than the total number of square metres.
Slope also deserves specific consideration. On some sites, trying to keep the entire house on a single level requires substantial earthworks, retaining walls or complex foundation solutions. On others, working with several levels can allow the building to follow the natural topography more effectively. For this reason, we recommend first assessing the plot before building a house so that a formal preference does not later force the project into an unsuitable solution.
The staircase should be part of the overall design strategy
In a two-storey home, the staircase should not simply be fitted into whatever space remains after the rooms have been laid out. Its position affects circulation, usable floor area, natural light and the relationship between levels. It can become an attractive architectural feature, but it remains part of the home’s infrastructure and will be used many times every day.
It is also worth considering what would happen if climbing stairs became difficult in the future. One common solution is to include a flexible room and full bathroom on the ground floor that can function as a study, guest room or bedroom. Planning for this possibility during the design stage adds flexibility without requiring major alterations later.
Which costs more: a single-storey or a two-storey house?
There is no reliable rule stating that one option is always cheaper than the other. Comparing only the number of floors can lead to misleading conclusions because the budget depends on the house as a whole and on how it sits on the site: structure, foundations, roof, façades, services, earthworks, finishes and external landscaping all affect the final cost.
In a single-storey house, a larger horizontal footprint generally means a greater foundation and roof area. In a two-storey home, that footprint can be reduced, but an intermediate floor structure, staircase and different structural solution are required. A meaningful comparison must therefore be based on two equivalent versions of the same project, with a similar floor area, level of specification and programme.
| Cost item | Single storey | Two storeys |
|---|---|---|
| Foundations | Usually extend over a larger area | May be concentrated within a smaller footprint |
| Roof | Larger area for the same total floor space | May be reduced by stacking part of the programme vertically |
| Intermediate floor structure | Not required | Required |
| Staircase | Not required | Must be built and integrated into the layout |
| Earthworks | May increase if a large level platform is required | Depends on how the house responds to the slope |
| Building services | Mainly horizontal distribution | Requires coordination between floors |
The geometry of the house also matters. A compact building resolves certain costs differently from a design with numerous recesses, courtyards, cantilevers or wings. Comparing costs by number of floors alone makes little sense without also comparing architectural complexity.
If budget is one of the main factors in the decision, it is better to estimate the project as a whole from the earliest stages. In our guide to how much it costs to build a house, we explain why the final price should be assessed by individual cost items rather than relying on a single price-per-square-metre figure.
The plot may influence the decision more than you expect
Before deciding between one or two floors, it is essential to check what can actually be built on the site. Maximum site coverage, buildable area, setbacks, permitted height and other planning conditions define the volume that can be constructed. A house that appears ideal on paper may no longer be viable once it is placed on a specific plot.
The physical characteristics of the site then come into play: slope, orientation, access, views, privacy from neighbouring properties, vegetation and exposure to wind. In areas with such a strong relationship with the landscape as the Costa Brava, these factors are particularly significant. In our bespoke home projects on the Costa Brava, we approach the house and its surroundings as part of the same design decision because adapting the architecture to the site usually produces better results than imposing a preconceived form.
A large, relatively flat plot may favour a horizontal home opening onto the garden. A narrower plot may call for two levels. A sloping site may benefit from several floor levels, while certain views might justify raising some rooms. The plot is not simply where the house is built: it is one of the variables that shapes the project.
How your lifestyle should influence the choice
Architecture should respond to real routines. A family with young children may place particular value on a direct connection between the kitchen, living room and garden; someone who works from home may need greater separation for a study; a second home may prioritise generous outdoor areas; and a property intended for long-term use may place accessibility above other considerations. The best layout emerges when the floor plan reflects how people actually live.
Before deciding on the number of floors, it is therefore worth answering several questions that go beyond aesthetic preference:
- How many people will use the house regularly, and how might their needs change?
- How important will the garden, swimming pool or porch be in everyday life?
- Do you want a clear separation between sleeping areas and social spaces?
- Are there views that can only be enjoyed from a higher level?
- Is avoiding stairs altogether an important priority?
- Do you need a bedroom or flexible room on the ground floor?
- How much of the plot do you want to leave free from construction?
The answers may even lead to an intermediate solution. Not every project needs to follow a strict one-storey or two-storey scheme. A house can concentrate most of its programme on the ground floor and reserve a smaller upper volume for additional bedrooms, a study, studio or guest accommodation.
Single-storey and two-storey layouts can also be combined
On certain plots, a hybrid composition offers a particularly effective balance. The main part of the home can be arranged on one level, keeping the principal bedroom, kitchen, living room and garden on the same floor, while a partial upper storey accommodates secondary uses. This preserves much of the accessibility of a single-level house without giving up the advantages of building upwards.
Another possibility is to adapt different volumes to the natural slope rather than creating two fully stacked floors. Double-height spaces, courtyards and elevated terraces can also transform the relationship between levels. Our bespoke residential projects show how custom design allows architecture to respond to the site and programme without relying on a repeated formula.
These alternatives are precisely why the decision should not be made too early. When a project begins with an analysis of needs, site conditions and budget, configurations may emerge that were not initially considered but resolve the overall brief more effectively. Designing a bespoke house means keeping options open until the project’s real requirements are fully understood.
Frequently asked questions before choosing
The question of one or two storeys often brings together several concerns about comfort, price and functionality. Considering each variable separately helps avoid decisions based only on assumptions and makes it easier to compare alternatives using consistent criteria.
It is also important to remember that a solution that works perfectly for one property may be unsuitable for the neighbouring plot. The final answer should always emerge from the specific project, especially when planning rules, topography and a highly personalised brief are involved.
Is a single-storey house always more comfortable?
In terms of circulation, removing stairs simplifies movement and improves accessibility. However, comfort also depends on having a well-planned layout. An excessively elongated single-storey house with inefficient routes may be less practical than a compact two-storey home.
Does a two-storey house leave more room for the garden?
When comparing two homes with a similar total floor area, distributing part of the programme over a second level can reduce the building footprint. This may leave more land available for a swimming pool, terrace, planting or outdoor living areas, provided the solution complies with local planning regulations.
Which option is better for a family with children?
Both can work well if the layout responds to the family’s needs. A single-storey home makes it easy to connect indoor areas with the garden, while two storeys can create a clearer separation between rest and activity. The position of bedrooms, stairs and communal areas matters more than the number of floors alone.
What if I want to remain in the house as I get older?
A single-storey house removes an important accessibility barrier from the outset. If you choose two levels, it may be advisable to include a bedroom and full bathroom on the ground floor or consider other accessibility solutions. Anticipating future needs during the design stage is far easier than adapting a completed house later.
Which option is better for a sloping plot?
There is no automatic answer. Depending on the gradient and access, several levels may follow the natural topography more effectively and reduce certain interventions; on other plots, it may be possible to create a suitable platform for a predominantly horizontal home. The topography should be assessed technically before choosing the configuration.
The best option is the one that makes the entire house work better
A single-storey house may be ideal when accessibility, convenience and a continuous connection with the outdoors are priorities. A two-storey home may be more appropriate when the aim is to reduce the footprint, separate functions, preserve garden space or take advantage of particular views. None of these factors should be considered without relating them to the others.
At Viñas Constructora, we design and build bespoke homes based on the site, the client’s needs and the project as a whole. Before choosing one or two storeys, it is worth comparing different layouts and assessing how each option affects the floor plan, outdoor areas, structure and budget. The right decision is not simply whether to build higher or wider, but to make sure every square metre has a purpose within the way the house will be lived in.
