407 m
Altitude
11.6 °C
Mean temperature
64
Frost days
1'219 kWh/kWc
Estimated solar yield
Local context: Climate and built environment
6 °C and approximately 64 frost days per year.7 °C. With heating requirements estimated at 2,711 heating degree days, your building's energy performance is a major lever for thermal comfort and reducing heating costs.
The city of Monthey stands out for its ecological commitment, having obtained the «Gold Energy City» label in 2023. This vision of an «ecological city for an industrial town» directly influences renovation expectations.
As an owner, considering these climatic parameters is essential to make your investment sustainable and contribute to the municipal goals, which aim to promote renovations and improve the energy efficiency of existing installations.
Energy renovation priorities
Monthey's 2023-2027 energy policy program places energy consumption reduction at the top of its priorities. For an owner, this means that before any system change, the insulation of the building envelope must be examined.
High-performance facade insulation not only limits heat loss but also reduces the necessary power of your future heating system, thus optimizing your investment.
The municipality's energy master plan strongly encourages renovations aimed at increasing energy efficiency. As part of your work, it is advisable to plan for facade insulation and the replacement of old windows.
These measures are supported by financial contributions within the framework of the Building Program in Valais. Integrating these works into a global approach not only allows for significant energy savings but also ensures an appreciation of your real estate assets in line with the city's ambitions.
Heating, district heating, and cantonal regulations
Heating is a central point of Monthey's energy strategy. The municipality is actively investing in the development of its district heating network, with major extension works planned until December 2025.
These works, which cover several sectors ranging from Avenue de l'Europe to Route des Saphirs, offer owners located in these zones a privileged opportunity to connect to an efficient centralized heating solution.
For those who cannot connect, the installation of heat pumps remains an encouraged alternative. The Canton of Valais offers aid via the Building Program, including flat-rate contributions per kW or per installation. The choice of the heating system must imperatively meet the current cantonal requirements.
Before replacing your boiler, systematically check the availability of district heating in your street.
Favoring renewable energies and efficient technologies not only allows you to benefit from subsidies but is fully in line with the municipality's vision of achieving increased energy efficiency for its entire housing stock.
Authorizations and heritage
Any significant transformation of a property in Monthey requires rigorous planning regarding administrative authorizations. Although there is no specific mention of a protected sector or an ISOS inventory for the municipality, it is essential to consult the municipal urban planning department before any project.
Work affecting the external appearance, such as facade insulation, the installation of solar panels, or window replacement, is subject to precise rules to guarantee the harmony of the urban landscape.
Compliance with these procedures is a crucial step to avoid any administrative deadlock. It is recommended to prepare a complete file including plans and the technical characteristics of the materials used.
In an industrial city that aspires to become an «ecological city», architectural coherence is as important as energy efficiency.
Good preparation beforehand facilitates obtaining the necessary permits and ensures that your renovation works are in line with municipal regulations, while respecting the integrity of your property in its local context.
Financial aid and taxation
The Canton of Valais, in collaboration with the Building Program, offers a wide range of subsidies to support your renovation projects.
Whether you are planning the installation of a heat pump, facade insulation, or window replacement as part of a retrofitting project, financial aid is available to reduce your investment burden.
For solar installations, the federal one-off remuneration via Pronovo is accessible, sometimes complemented by specific municipal premiums in certain areas.
Regarding taxation, it is important to note that energy renovation work can often be deducted from your taxable income, which is a significant indirect aid.7, every saving made on the net cost of the work through subsidies and tax deductions reinforces the profitability of your renovation.
It is imperative to consult the official portals of the Building Program before starting your work to guarantee your eligibility for aid. Rigorous financial planning, combining subsidies and tax benefits, is the key to carrying out sustainable work while optimizing the taxation of your property in Monthey.
Planning and selecting companies
The success of a renovation in Monthey relies on methodical planning. The first step is to establish an energy audit of your building to identify priorities, in accordance with the city of energy's goals. Once your priorities are defined, the selection of companies is crucial.
Favor local or regional companies possessing the necessary certifications to execute subsidizable works, particularly for insulation, heat pumps, or solar photovoltaics.
Always request several comparative quotes and check that the companies are familiar with the technical requirements in Valais. A good professional will not only carry out the work according to current standards but will also be able to assist you in preparing the documents necessary for your subsidy applications.
The coordination of different trades, especially in the case of heavy renovations, is facilitated by clear planning. Anticipate deadlines, especially those related to permit applications and the availability of craftsmen, to carry out your project without stress.
By choosing competent partners, you guarantee the durability of your investment and its compliance with the quality standards of Monthey.
Local data in detail
Heating and energy
A well-oriented solar PV system yields roughly 1'219 kWh per kWp per year here.[6]
Permits and heritage
Tax and renovation
The municipal tax coefficient of Monthey is 1.7%.[7]
Water quality
Local housing stock
Choose your works in Monthey
Climate data for Monthey
- Altitude
- 407 m[8]
- Heating degree days
- 2'711 Kj/an (20/12 °C)[9]
- Frost days
- 64 jours/an[10]
- Solar irradiation
- 1'385 kWh/m²/an (horizontal)[11]
- Winter design temperature
- -9.7 °C (1er percentile des minimales)[12]
- Mean temperature
- 11.6 °C[13]
- Estimated solar yield
- 1'219 kWh/kWc/an (toit ~30° sud, PR 0.8, estimation)[6]
Nearby municipalities : Sion · Martigny · Sierre · Brigue-Glis
Frequently asked questions
Where can I check if I am eligible for district heating in Monthey?
The district heating network is being extended until December 2025. Consult the municipal technical services to find out the schedule of works by sector and the feasibility of connection for your property.
What aid is available for my facade insulation in Monthey?
Facade insulation is supported by the Building Program in Valais. You can obtain a financial contribution calculated per m² according to the achievement of specific requirements.
Do I need to apply for authorization to install solar panels?
Yes, any change affecting the exterior appearance of your building, such as the installation of solar panels, requires consulting the urban planning department to comply with municipal regulations.
Can cantonal and federal aid be combined?
Yes, aid from the Building Program (cantonal) and the federal one-off remuneration for solar (via Pronovo) can be combined subject to respecting their respective conditions.
What are the energy priorities for an old house in Monthey?
The priority is the insulation of the envelope (facade, windows, roof) before considering replacing the heating system to ensure optimal efficiency and reduce energy needs.
Are there municipal premiums for photovoltaics in Monthey?
Some Valais municipalities offer additional premiums. It is recommended to check directly on the Monthey municipality's website if specific programs are currently active.
Sources
- [1] S0
- [2] monthey.ch
- [3] — · estimate
- [4] Informations sur l'eau potable, monthey.ch · estimate
- [5] — · estimate
- [6] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024) · estimate
- [7] raiffeisen.ch
- [8] swisstopo – service d'altitude (MNT)
- [9] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024)
- [10] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024)
- [11] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024)
- [12] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024)
- [13] Open-Meteo Historical Weather API (réanalyse ERA5, moyenne 2015-2024)
