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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringDübendorfQC-Expert AG
QC-Expert AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of QC-Expert AG is the creation of expert opinions, measurements, lightning expert opinions, consulting and arbitration expert opinions in the field of construction damage, particularly in the areas of building structure, building envelope, interior finishing and building services engineering. The company also provides court expert opinions and arbitration expert opinions and publishes publications and information sheets on these topics.

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Products & services

Industry:Technical Consulting & Engineering
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4.2/5

QC-Expert AG

✓ Offered6
Expert reports
Neutral and independent expert reports for building damage, including a defects report, cause analysis and a remediation recommendation; on request also an estimate of remediation costs.
Court expert reports
Investigations commissioned by courts, including precautionary evidence documentation and court expert reports for proceedings by certified court experts.
Measurements
Building-physics measurements for cause analysis or as an independent information service, e.g. airtightness, moisture, surface temperatures, indoor climate and thermography.
Consultations
On-site consultations on patterns of damage, causes and avoidance, with indicative measurements, remediation proposals and minutes or a short report.
Quick expert assessment / Consultations
Oral assessment of minor building damage on site, usually within 1–3 weeks, including evaluation of causes and remediation without a written report.
Expert determination
Neutral expert determinations in disputes regarding rectification of defects and warranty services, as a contractually agreed basis for a joint solution.
Trust & reputation

ranQ Trust Score of QC-Expert AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

QC-Expert AG scores 70.1 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.81.624%
  • 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.50.08%
QC-Expert AG scores 89.3 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.70.07%
QC-Expert AG 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%
QC-Expert AG scores 9.7 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 35.9.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

QC-Expert AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 9 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 9 reviews across all connected sources

Sources
GGoogle59
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Kriesbachstrasse 30
8600 Dübendorf
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-112.198.837
Founded
2005 · 21 years
Last commercial register change
June 1, 2026
Employees
11 to 20
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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