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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberAllschwilWinkelmann Engineering GmbH
Winkelmann Engineering GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Winkelmann Engineering is the planning, development and realization of installations for building services, particularly in the areas of heating, ventilation, air conditioning and refrigeration (HVAC). This also includes services such as consulting, concept development, design, tendering, construction supervision and commissioning of installations for industry, commerce, residential construction and administration. The company also offers specialized services such as energy optimization, renovation recommendations and operational support.

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Products & services

Industry:Plumber
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Winkelmann Engineering GmbH

✓ Offered6
HVAC Planning and Plant Engineering
HVAC systems for industrial, commercial and residential buildings, including energy optimisation, heat and cold generation, ventilation, and sanitary and water technology.
Consulting, Planning and Construction Management
Consulting, concepts, studies, project planning, tendering, schedule and cost control, specialist site supervision, commissioning, acceptance and operational optimisation.
Pharma and Cleanroom Technology
Ventilation and cleanroom technology for the pharmaceutical industry, with concept planning, layout planning, detail engineering, construction and assembly management, documentation and support.
Sanitary and Water Technology
Sanitary and water technology for new builds, conversions and refurbishments, including planning, execution, construction management and integration with building services systems.
Laboratory and Filtration Technology
Laboratory technology as well as filtration and dust extraction technology, complemented by engineering planning, detailed design and supporting CAD/CAE services.
Energy and Efficiency Optimisation
Energy optimisation of building services systems, heat demand calculations, Minergie consulting, thermal insulation verification and refurbishment recommendations.
Trust & reputation

ranQ Trust Score of Winkelmann Engineering GmbH

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of November 2026

Winkelmann Engineering 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.
x
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%
Winkelmann Engineering GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • 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%
Winkelmann Engineering GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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).85.022%
Winkelmann Engineering GmbH scores 0.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of November 2026.

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

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Location

Sandweg 46
4123 Allschwil

At a glance

Legal form
Limited Liability Company
UID
CHE-105.161.579
Founded
1999 · 27 years
Last commercial register change
November 25, 2016
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BLAllschwil
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.
88.0
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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