Building a conservatory with a concept
A conservatory changes a house more than many other extensions. It affects daylight, indoor climate, energy balance, and even the use of adjacent living areas. While for some it is a seasonal retreat, for others it becomes an integral part of the living space—with correspondingly different requirements in terms of technology and construction.
Winter gardens are not a standard product, especially in Switzerland. Climate, snow load, energy regulations, and municipal building codes make each project unique. This results in significant differences in costs, materials, and design. Making incorrect assumptions early on—for example, about insulation, orientation, or use—can lead to high energy consumption or reduced comfort later on.
This guide shows you the different types of conservatories available, provides a realistic breakdown of the costs involved, and explains what you need to consider in terms of planning, material selection, and permits to ensure that your conservatory will function well in the long term—technically, energetically, and in everyday use.
How much does a conservatory cost in Switzerland?
The cost of a conservatory cannot be estimated on a flat-rate basis. The decisive factors are how intensively the space will be used and what energy requirements must be met. A simple summer garden differs greatly from a heated living conservatory, which is considered a full-fledged extension of the house, in terms of both technology and price.
Before obtaining specific quotes, it is therefore worth clearly classifying the conservatory: seasonal, partially heated, or year-round living space. Only then can a realistic cost estimate be made.
Cost range depending on conservatory design
Cold conservatory (summer garden) – without foundation – approx. 32m²
Price range: approx. $40,000 to $60,000
A cold conservatory is the simplest and most affordable type of conservatory. It primarily serves as a protected outdoor area and is mainly usable during the transitional months. As neither heating nor thermal insulation are provided, there are no energy regulations to comply with. The construction is kept simple and focuses on weather protection rather than living comfort.
Partially insulated conservatory – with foundation – approx. 32m²
Price range: approx. $45,000 to $65,000
This option offers a noticeable increase in comfort compared to a summer garden. Thanks to better glazing and more stable profiles, the room can be used for most of the year. Additional heating is possible, but not to the same standard as in living areas. The foundation, higher-quality materials, and more complex installation increase the costs, but they remain well below those of a fully heated conservatory.
Heated conservatory – with foundation – approx. 32 m²
Price range: approx. $55,000 to $75,000
A heated conservatory is legally considered additional living space. The technical requirements are correspondingly high: fully insulated profiles, triple glazing, load-bearing foundations, and complete electrical and heating connections are mandatory. This solution is the most cost-intensive, but offers year-round use and maximum living comfort.
Overview of typical cost components
A conservatory consists of several individual components, which are weighted very differently depending on the project:
- Simple conservatory (15 m², without extras): approx. $19,000
- Heating solution for a 15 m² conservatory: approx. $3,500
- Ventilation systems (depending on technology): approx. $2,000 to $3,500
- Foundation for 15 m² (if necessary): approx. $3,500 to $4,500
These individual items together make up the final price of the project. Differences between various quotes are therefore normal and are usually due to differences in equipment, construction, and technical solutions.
Cost factors that are often underestimated
Many budget overruns are not caused by the conservatory itself, but by additional requirements:
Snow load andstatics
In many regions of Switzerland, structures must bear heavy snow loads. This requires stronger profiles and more complex fastenings.
Summer heatprotection
Without external sun protection, a conservatory can become very hot. Internal solutions are usually not sufficient.
Energy consumption in winter
Heated conservatories require a well-designed insulation and shading solution, otherwise heating costs will rise significantly.
Automation
Sensors for shading, ventilation, or temperature increase comfort but have a noticeable impact on the budget.
Installationconditions
Terraced locations, sloping plots, or areas that are difficult to access significantly increase the logistical effort required.
Comparing conservatory types – which solution is right for you?
A sunroom does not have to be able to do everything. The decisive factor is when and how the space is used. The type of construction determines comfort, costs, and legal requirements.
Cold conservatory / Summer garden
This design is intended for seasonal use. Uninsulated profiles and generous glass surfaces create proximity to nature without replacing living space.
Strengths:
- lowest cost
- high transparency
- rapid implementation
Restrictions:
- barely usable in winter
- no heat storage
Suitable for:
Users looking for a sheltered outdoor area for spring to fall.
Partially insulated conservatory
The interim solution offers more protection from the cold, but remains less energy-efficient than a living space.
Strengths:
- flexible use during transitional periods
- moderate budget
- often open generously
Restrictions:
- cool in winter without sun
- not recognized as living space
Suitable for:
Households that want comfort without full heating.
Residential conservatory (heated conservatory)
A genuine interior space is being created here, meeting all technical requirements.
Strengths:
- usable all year round
- high quality of living
- sustainable value enhancement
Restrictions:
- high investment costs
- strict building and energy requirements
Suitable for:
Owners who want to create more living space on a permanent basis.
Orientation and location – crucial for climate and costs
The position of the conservatory has a greater influence on energy gain and comfort than many technical details. South-facing conservatories make optimal use of the low winter sun, but require shading in summer. East-facing conservatories benefit from the morning sun, while west-facing conservatories provide plenty of warmth in the evening.
Heat-retaining materials in the floor or adjacent walls are also important. These buffer temperature fluctuations and improve the indoor climate. In addition, a well-placed conservatory can act as a thermal transition room and relieve adjacent living areas.
Materials for conservatories – overview of properties
Aluminum
Very stable, durable, and virtually maintenance-free. Ideal for large glass surfaces and modern architecture. Only suitable for heated conservatories with thermal breaks.
Wood
Excellent insulation values and warm appearance. Requires regular maintenance, particularly suitable for high-quality residential conservatories.
Wood-aluminum
Wood on the inside, aluminum on the outside. High price, but long service life and minimal maintenance. Premium solution for demanding projects.
Plastic
Inexpensive and easy to maintain, but with limited load-bearing capacity. Suitable for small, unheated conservatories.
Steel
Very durable, but low insulation effect and high corrosion protection required. More suitable for summer gardens or special solutions.
Building permit in Switzerland
Conservatories are considered structural extensions and generally require a permit. Boundary distances, fire safety, and energy requirements vary depending on the municipality. In the case of condominiums, the approval of the owners' association is also required. If the conservatory is heated, it is legally considered living space.
Common mistakes in conservatory construction
- incorrect alignment without sun protection
- unsuitable glazing
- lack of ventilation concepts
- inadequate structural analysis
- Systems that are too cheap and have a short lifespan
Professional planning prevents costly repairs.
Conclusion: Planning your conservatory properly pays off
A conservatory can significantly improve the quality of living, light, and usable space—provided that its use, technology, and location are carefully coordinated. Deciding early on whether you want a seasonal or year-round space will help you make better decisions about your budget, choice of materials, and construction method. With the help of experienced specialists, you can create a durable conservatory that offers comfort and increases the value of your property in the long term.
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