Checklist: Renovate Energetically a House or Apartment

March 1, 2022
  1. How great is the energy-saving potential?
  2. How energy efficient is your house or flat?
  3. How much does an energy-efficient renovation cost?
  4. Subsidies for energy-efficient renovations
  5. Renovate for energy efficiency and save taxes

Energy-efficient renovations are worthwhile for you and for the environment. You make an important contribution to climate protection, use less energy, save a lot of money, maintain or increase the market value of your residential property and improve your living comfort. With our checklist "Energy-efficient renovation of a house or flat" you can plan individual measures or a complete renovation in four steps:

  1. Define goals: Think about how you want to live in the medium to long term and why you want to renovate your house or flat for energy efficiency. What is particularly important to you?
  2. Analyse actual situation: Before you start thinking about energy renovation measures, you should know more about the building fabric and clarify the financing.
  3. Define target situation: Plan all renovation measures within the framework of your financial possibilities and priorities. Experts recommend renovating from the outside in.
  4. Arrange financing: There is a lot to do before the work begins. Among other things, you must have arranged the financing and applied for the subsidies before the craftsmen can start.

How great is the energy-saving potential?

Every energy renovation measure has considerable energy-saving potential:

You can fully benefit from the savings potential with a complete renovation. A new heating system, better exterior insulation and insulated windows (energy efficiency class A) reduce electricity consumption by about 60 percent.

Renovate Energetically

Would you like to renovate your house or flat to make it more energy efficient?

Our checklist " Meaningful Energy Renovation" guides you step by step through the renovation process.
Download Checklist Now

How energy efficient is your house or flat?

The analysis of the actual situation is the basis for all renovation measures. Energy efficiency is assessed in seven energy classes (from A to G). For this purpose, the building envelope and building technology are analysed. With an energy efficiency class of C or worse, there is energy optimisation potential. You can check the energy efficiency with our energy calculator and simulate the influence of renovation measures. The interactive energy calculator analyses the savings potential, calculates the investment costs and takes subsidies into account. Alternatively, you can commission a certified GEAK expert. The cantonal building energy certificate costs about CHF 800 for an average single-family house (GEAK Basis), and about CHF 2000 with three renovation proposals (GEAK Plus).

Energy Renovation: Energy Calculator from Houzy
The energy calculator simulates the impact of energy renovations, calculates the investment costs and takes subsidies into account.

How much does an energy-efficient renovation cost?

The costs depend on the scope. For example, if you replace an oil heating system with an air-source heat pump, you should expect to pay 40,000 to 50,000 francs, and a geothermal probe costs about 20,000 francs more. For a modern triple-glazed window, you should expect to pay 400 to 600 francs per square metre of window area, not including extras such as tilt and turn fittings, improved sound insulation or safety glass. Insulating the attic floor or the cellar ceiling costs about 150 francs per square metre. You can calculate the approximate investment costs with our energy calculator.

Energy Efficiency

Check energy measures and subsidies

With the Houzy energy calculator you can easily calculate the current energy efficiency class of your property and simulate the impact of energy renovations.
Check Savings Potential Now

Subsidies for energy-efficient renovations

The federal government, cantons, cities, municipalities and some regional energy suppliers support climate-friendly conversions with subsidies or other financial assistance. At you can get an overview of all funding programmes and advice centres by entering the town or postcode. You can fill out and submit your funding application(s) online or download it as a pdf, print it out, fill it out and submit it. Some banks promote energy-efficient renovations with subsidised mortgages. Therefore, ask for a green mortgage when you clarify the financing.

Houzy Hint


Our energy calculator takes all subsidies into account when calculating the investment costs of energy renovation measures.

Energetic Renovation: Craftsmen Insulate a House Roof
If you renovate in stages, you should start from the outside inwards and insulate the roof first.

Houzy Advice

Good to know

It is essential that you submit your funding application before the renovation work begins.

Renovate for energy efficiency and save taxes

Energy-efficient renovations are considered value-preserving investments for tax purposes. This means that you can deduct the costs from your taxable income and pay less income tax. To optimise your tax burden, it may be worthwhile to spread the renovation measures over several years and break the tax progression. Talk to your tax advisor or fiduciary and compare the possible tax advantages with the cumulatively higher costs for individual energy renovation measures compared to an overall renovation. If you decide on individual measures, energy experts recommend these stages:

  1. Insulate façade, replace windows, insulate roof or attic and basement ceiling
  2. Replace heating system, install hot water tank and solar panels
  3. Produce solar power yourself and optimise energy flows with smart home technologies
  4. Replace all household appliances and electrical installations and install a comfort ventilation system.

Do you want to renovate your home to make it more energy efficient? Use our new checklist to plan individual measures or complete renovations. And with our energy calculator you can check the energy efficiency class of the building, simulate the impact of energy refurbishments, analyse the savings potential and calculate the investment costs.

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