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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsWinterthurDr. Deuring + Oehninger AG
Dr. Deuring + Oehninger AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Dr. Deuring + Oehninger AG is the provision of highly specialized engineering services in the fields of high-rise and bridge construction, including condition analysis, planning and design, project and construction management, general planning and overall management, studies and expert opinions, as well as digitalization.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered6
Planning and design
Planning and design of construction projects, optimal structural design, coordination with all disciplines and efficient realisation of the building project.
Project and construction management
Project and construction management with timely, sustainable and cost-effective solutions, quality assurance through self-checking, four-eyes principle and second review.
Master planning and overall management
Master planning and overall management of construction projects, operational implementation, coordination and leadership of the master planning team, and interface between clients, authorities and involved contractors.
Studies and expert reports
Studies and expert reports for buildings and bridge construction, plausibility checks, project assessments, as well as analysis of damage costs for insurers and courts.
Building analysis
Building analysis as a basis for renewal and refurbishment planning, inventory survey, assessment of components and technical installations, and concrete decision-making foundations.
Digitalisation
Digital processes for collaboration in planning and design, project and construction management, overall management and expert services within interdisciplinary project teams.
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4.1/5

Dr. Deuring + Oehninger AG

Trust & reputation

ranQ Trust Score of Dr. Deuring + Oehninger AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of October 2026

Dr. Deuring + Oehninger AG scores 61.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.72.124%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.58.610%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.35.08%
Dr. Deuring + Oehninger AG scores 92.3 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%
Dr. Deuring + Oehninger AG scores 86.7 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).86.722%
Dr. Deuring + Oehninger AG scores 55.0 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 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

Dr. Deuring + Oehninger AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.6 out of 5 stars from 9 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 9 reviews across all connected sources

Sources
GGoogle4.69
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

April 12, 2019Media
Building-Award 2019: Die Nominierten
espazium.ch
February 4, 2018Media
Mit dem Kopf immer nur bei einer Sache
tagesanzeiger.ch

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Location

Römerstrasse 21
8400 Winterthur
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.257.655
Founded
1995 · 31 years
Last commercial register change
February 9, 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.70.03%
    • Full methodology

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