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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureEnvironmental engineerBernKellerhals + Haefeli AG
Kellerhals + Haefeli AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Kellerhals + Haefeli AG is a geological consultancy working in engineering geology, hydrogeology, extraction and landfill projects, natural hazards, contaminated sites, soil and geothermal energy. Its services include ground investigations, groundwater protection, and the assessment and remediation of contaminated sites.

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Products & services

Industry:Environmental engineer
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Kellerhals + Haefeli AG

Geologist
✓ Offered7
Engineering geology
Subsurface ground investigations, geotechnical ground models, underground construction and tunnel construction, stability assessments, geotechnical consulting as well as geological-geotechnical construction monitoring and supervision.
Hydrogeology
Spring and groundwater abstractions, groundwater protection, infiltration, groundwater monitoring, groundwater heat pumps, and camera inspections of spring and groundwater abstractions.
Natural hazards
Hazard assessments and risk analyses, 3D simulations, structural protection and protective measures, construction of protective measures, monitoring and emergency concepts, and incident documentation.
Contaminated sites
Investigations of contaminated sites, building pollutant diagnostics, construction on contaminated sites as well as remediation with variant studies, feasibility checks and remediation projects.
Extraction and landfill
Search for new extraction sites and landfill locations, support for existing extraction sites and landfills, as well as UVB, ZPP, development regulations and ADT structure plans.
Soil protection and soil-science construction supervision
Soil protection concepts, environmental impact reports, soil-science construction supervision as well as expert support for earth movements and soil-related work.
Geothermal energy
Clarification of the feasibility of boreholes for ground-source heat probes, geological monitoring of ground-source boreholes as well as hydrogeological investigations for near-surface and deep geothermal heat use.
Trust & reputation

ranQ Trust Score of Kellerhals + Haefeli AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Kellerhals + Haefeli AG 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%
Kellerhals + Haefeli AG scores 95.0 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.82.07%
Kellerhals + Haefeli AG 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%
Kellerhals + Haefeli AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Kellerhals + Haefeli AG 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

Kapellenstrasse 22
3011 Bern

At a glance

Legal form
Corporation
UID
CHE-102.132.073
Founded
1990 · 36 years
Last commercial register change
September 17, 2026
Employees
21 to 50
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.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.95.03%
    • Full methodology

    Active in 3 of 26 cantons · 2 municipalities

    • BEBern
    • LULucerne
    TITicino

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