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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesEngineerZurichStefan Schrader AG
Stefan Schrader AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Stefan Schrader AG advises building owners and design teams on sustainability in building construction, particularly for renovation and work on existing buildings. Its services include guiding building certification processes, coordinating sustainability measures during planning, and supporting quality assurance during construction.

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Service area

Offering

Products & services

Industry:Engineer
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4.1/5

Stefan Schrader AG

Owner's representation
✓ Offered3
Advisory for sustainable construction
Advising clients on defining verifiable targets for sustainable construction, including preliminary studies, pre-assessments and support for competitions.
Planning and certification management for sustainable buildings
Leading and moderating certification processes for DGNB, SNBS, Minergie-ECO and the 2000-Watt Society, coordinating planner services and implementing them in the submission.
Client representation and implementation support
Supporting TU/GU, trades and site management with material selection, regular project status checks within PQM, and accompanying acceptance measurements and certification.
Trust & reputation

ranQ Trust Score of Stefan Schrader AG: 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.

Stefan Schrader 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.
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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%
Stefan Schrader AG scores 78.3 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.83.012%
  • 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%
Stefan Schrader 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%
Stefan Schrader AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Stefan Schrader 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

Grubenstrasse 12
8045 Zurich

At a glance

Legal form
Corporation
UID
CHE-148.303.215
Founded
2017 · 9 years
Last commercial register change
March 13, 2019
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHZurich
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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