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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,837 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringSilvaplanagreen-sun.ch GmbH
green-sun.ch GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

green-sun.ch GmbH provides energy consulting for buildings, including GEAK Plus assessments, energy certificates, subsidy applications, and planning and tendering services. The company supports private and business clients with renewable heating systems and building permit matters.

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Offering

Products & services

Industry:Technical Consulting & EngineeringConstruction & Project ManagementSustainability Sector
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3.6/5

green-sun.ch GmbH

✓ Offered7
Energy consulting
Energy consulting for new builds, conversions and renovations; analysis of the building envelope and building services, with recommendations on efficiency, CO₂ reduction, heating systems and subsidy programmes.
GEAK and GEAK Plus
GEAK and GEAK Plus reports for assessing a building’s condition, with clear presentation of measures, costs, savings, heating capacity and subsidy options.
Energy performance certificates
Energy performance certificates under SIA 380/1 as component-by-component or system verification for new builds, conversions and renovations, including private review and closing forms.
Subsidy consulting
Consulting and application support for subsidies for building-envelope measures, heating replacement and energy renovations, including review of municipal, cantonal and federal contributions.
Renewable heating impulse consulting
On-site advice for heating replacement, comparing the existing and recommended systems with consumption figures, costs and a short decision basis.
Planning and tendering
Planning and tendering for the building envelope; detailed planning to SIA standards, quotation requests, NPK tenders and construction contracts with selected contractors.
Building permit applications
Building permit applications with CAD plans and completed forms, ready for signature by the client; including the required documentation.
Trust & reputation

ranQ Trust Score of green-sun.ch GmbH: 3.6 out of 5.0

Trust Score3.6/ 5.0

Solid

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Data basis 54% · As of October 2026

green-sun.ch GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
green-sun.ch GmbH scores 48.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.25.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
green-sun.ch GmbH scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
green-sun.ch GmbH scores 4.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

green-sun.ch GmbH reaches a ranQ Trust Score of 3.6 out of 5.0 — rated «Solid». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Hier entsteht die Karte
Via Maistra 2
7513 Silvaplana

At a glance

Legal form
Branch
UID
CHE-489.186.210
Founded
2025 · 1 year
Last commercial register change
December 18, 2025
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
76.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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