Renovating in Monthey: A practical guide for property owners

In Monthey, the federal building register lists 2'723 residential buildings and 9'846 dwellings. These municipal benchmarks help put your home in context, but do not replace an individual assessment.

Source : Registre fédéral des bâtiments et des logements (RegBL), OFS, 2026. Existing residential buildings; percentages of recorded values.

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.

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.

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.

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.

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.

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.