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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberGossau SgEdwin Keller + Partner AG Gossau
Edwin Keller + Partner AG Gossau Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Edwin Keller + Partner AG Gossau is an independent engineering firm specialising in building services, with a focus on impartial consulting and planning. Its services include specialist coordination and planning for plumbing, heating, ventilation, air conditioning and cooling.

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Service area

Offering

Products & services

Industry:Plumber
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Edwin Keller + Partner AG Gossau

✓ Offered7
Building services planning
Building services planning from initial concept through to handover, with neutral consulting, technical coordination and economical optimization in early project phases.
Sanitary engineering
Sanitary engineering for new builds, conversions and renovation projects, including design of sanitary installations, pipe routing and integral integration into building services.
Heating system design
Heating system design within building services engineering, with overall planning and dimensioning for projects requiring comfort, safety and energy efficiency.
Ventilation system design
Ventilation system design for buildings with requirements for consistent air quality, indoor climate and integrated building services solutions.
Refrigeration system design
Refrigeration system design for building services projects, including air-conditioning refrigeration and combined HVAC solutions for demanding applications.
Specialist coordination for building services
Specialist coordination of the entire building services across the trades sanitary, heating, ventilation, air conditioning and refrigeration, aligned for a smooth project process.
Property drainage
Property drainage with planning of internal and external drainage mains, service lines and drainage solutions for buildings and sites.
Trust & reputation

ranQ Trust Score of Edwin Keller + Partner AG Gossau: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Edwin Keller + Partner AG Gossau 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%
Edwin Keller + Partner AG Gossau scores 82.3 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.92.512%
  • 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%
Edwin Keller + Partner AG Gossau scores 85.0 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).85.022%
Edwin Keller + Partner AG Gossau scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Edwin Keller + Partner AG Gossau reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». 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 November 2026.

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

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Location

St. Gallerstrasse 60
9200 Gossau Sg

At a glance

Legal form
Corporation
UID
CHE-230.173.497
Founded
2014 · 12 years
Last commercial register change
January 28, 2021
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGGossau (SG)
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.100.06%
  • 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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