Canton
Solar thermal — Geneva
Depending on system sizing.
Geneva support for solar hot water production.
www.ge.chSolar water heating · Versoix
Solar water heating in Versoix
Indicative price, tips, grants and companies for your project in Versoix (Geneva).
At a glance
- Typical budget
- CHF 13'000 – CHF 30'200
- Midpoint
- CHF 20'900
- Grants found
- 1
- Nearby companies
- 4
Worked examples in Versoix
Small project
CHF 10'100 – CHF 23'600
Typical project
CHF 13'000 – CHF 30'200
Large project
CHF 17'800 – CHF 41'000
| Project | Quantity | Low | High | Per unit |
|---|---|---|---|---|
| Small project | 3 m² | CHF 10'100 | CHF 23'600 | CHF 5'500 |
| Typical project | 6 m² | CHF 13'000 | CHF 30'200 | CHF 3'500 |
| Large project | 11 m² | CHF 17'800 | CHF 41'000 | CHF 2'600 |
Computed with our estimator for Versoix (regional factor included), standard finish. Only the project size changes.
Cost split (typical project)
- Labour : CHF 8'400 (40 %)
- Materials : CHF 10'500 (50 %)
- Other costs : CHF 2'100 (10 %)
What the price covers
Included
- Supply and installation
- VAT
- Collectors, controls, standard connection and tank according to answers
Not included
- Permits and architect fees
- Unexpected structural issues
- Possible subsidies
- Roof refurbishment and replacement of main heating
Tips before you start
- Solar thermal collectors usually cover much of summer hot water.
- Combining collectors with a heat pump needs a sizing study.
- Several cantons subsidise collectors per m² or per installation.
Your project in 5 steps
1. Estimate
Set a budget range with the estimator.
2. Grants
Apply before work starts.
3. Quotes
Compare at least 3 quotes.
4. Permit
Check with the municipality whether a permit is needed.
5. Works
Follow the site and do a written handover.
Grants and subsidies
Check amounts and conditions with the provider before signing: apply before work starts in most cases.
Versoix's housing stock in figures
The federal building register lists 1'406 residential buildings with 5'552 dwellings in Versoix. 51% were built before 1980, before serious insulation standards, and 74% are still heated with oil or gas.
Only 10.9% of residential buildings in Versoix report a solar thermal system in the register, so most roofs are still free. Photovoltaics are not recorded there; check the solar cadastre for your roof.
Age of residential buildings
- Before 191914 %
- 1919–19459 %
- 1946–19609 %
- 1961–197010 %
- 1971–19809 %
- 1981–199016 %
- 1991–200013 %
- 2001–201010 %
- Since 201110 %
Main heating energy
- Gas44 %
- Heating oil30 %
- Heat pump17 %
- Electricity4 %
- District heating3 %
- Wood2 %
- Solar thermal1 %
Heating and hot water: which energies?
| Energy | Heating | Hot water |
|---|---|---|
| Gas | 44 % | 40 % |
| Heating oil | 30 % | 27.5 % |
| District heating | 3 % | 1 % |
| Heat pump | 17 % | 3.9 % |
| Electricity | 4 % | 9.1 % |
| Wood | 2 % | 1 % |
| Solar thermal | 1 % | 10.3 % |
Each line gives the share of buildings using that energy, separately for heating and for hot water. The two columns do not always reach 100%: some buildings combine two systems, or reported none.
Type of heating system
- Boiler (unspecified)66.7 %
- Heat pump16.8 %
- Condensing boiler5.3 %
- Standard boiler3.4 %
- Heat exchanger (district)2.8 %
- Direct electric heaters2.3 %
- Central electric heating1.7 %
- Stove0.5 %
A standard non-condensing boiler is usually older and less efficient.
Houses or apartment buildings?
- Single-family houses67.1 %
- Two-dwelling houses7.2 %
- Apartment buildings (3+)25.7 %
10 % of buildings mix housing with shops or offices.
The typical building
- storeys (median)
- 3
- median footprint
- 118 m²
- median dwelling area
- 90 m²
Renovations, heritage and volumes
For your renovation plans in Versoix, the official building register data provides limited insights due to partial coverage. Information regarding heritage protection status and the year of renovation is not currently recorded. Furthermore, building volume data, measured under the SIA 416 standard, lacks specific median values to guide your project scale. Given the absence of these figures, it is essential to contact the municipality directly. Engaging with local authorities early is the best way to obtain the precise technical details required for planning heating or insulation works and ensuring your renovation cost estimates are accurate.
0
buildings flagged as protected
status known for 22 of 1'406 buildings; check with the municipality
Source : OFS — RegBL (export communal complet). Existing residential buildings; percentages of recorded values.
Companies in the area
Mazzone Sergio
1290 Versoix · about 0 km
Mazzone Sergio, based in Versoix, specializes in installing solar thermal collectors for domestic hot water and heating.
sebasol.infoBORRELLO CHAUFFAGE & SANITAIRE SARL
1290 Versoix · about 0 km
Family business specializing in the installation and maintenance of heating systems, heat pumps, solar thermal energy, and sanitary equipment.
borrello.chONE Tech Energies Sàrl
1290 Versoix · about 0 km
ONE Tech Energies Sàrl, based in Versoix, provides plumbing, heating and ventilation installations, as well as heat pump, photovoltaic and solar thermal systems.
one-tech.chAGROTHERM SA
1290 Versoix · about 0 km
AGROTHERM SA specializes in the installation of heating, plumbing, ventilation, and solar photovoltaic and thermal systems, while providing energy-related building renovation services.
agrotherm.chSuggestions from the commercial register by distance and activity. Not an endorsement or partnership.
Useful local data
Rules of the canton of Geneva
These rules apply across the whole canton, not only in this town.
Permits
- Competent authority : Office de l'urbanisme
- Solar panels : Soumise à autorisation de construire, mais avec une procédure simplifiée si certaines conditions sont remplies (conformité au droit des zones, intégration paysagère et patrimoniale satisfaisante, puissance totale inférieure à 100 kVA). Procédure simplifiée possible par le biais d'une déclaration préalable, si les installations sont sur des toits en pente conformes ou sur des toits plats non visibles, ou dans certains périmètres d'aménagement (zone 4B, 5, 5A, 5B, 6).
- Heat pump : Les pompes à chaleur air-eau ou air-air nécessitent une autorisation de construire si leur puissance dépasse 10 kW. Si elles sont installées à l'intérieur, elles sont soumises à la LCI (Loi sur les constructions et les installations) et non à la LALPT (Loi sur l'aménagement du territoire et les constructions). Pour les pompes à chaleur de puissance inférieure ou égale à 10 kW, une déclaration préalable est nécessaire, accompagnée d'une attestation de conformité acoustique. Des exigences en matière de bruit sont mentionnées pour les installations extérieures, avec des valeurs limites d'immissions fixées par l'Ordonnance sur la protection contre le bruit (OPB) et des règles spécifiques du règlement d'application de la LCI (rLCI). Un bureau spécialisé en acoustique est souvent requis pour les projets complexes.
- Procedure : l'autorisation de construire
Source : Guide Installations Solaires et Thermopompes - Canton de Genève
Other works in Versoix
Kitchen renovationBathroom renovationNew flooringInterior paintingWindow replacementRoof renovationFacade insulationHeat pump installationSolar panelsHome solar batteryTerrace constructionFence installationStairwell renovationElevator installation or upgrade