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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitectZurichStefan Roggo und Christoph Widmer Architekten GmbH
Stefan Roggo und Christoph Widmer Architekten GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Stefan Roggo und Christoph Widmer Architekten GmbH is an architecture practice working in architecture and urban design. It undertakes building projects across all project phases, including competition entries, project management and construction supervision.

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Service area

Offering

Products & services

Industry:Architect
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4.1/5

Stefan Roggo und Christoph Widmer Architekten GmbH

✓ Offered3
Architecture and Urban Planning
Architecture and urban planning for a wide range of construction assignments in all project phases, including competition entries as well as project and construction management.
Competition and Study Commissions
Competition entries and study commissions for public and institutional building projects, with ongoing participation in selective and open procedures.
Project and Construction Management
Project and construction management for architectural projects, from planning through implementation, complemented by coordination with designers and professionals.
Trust & reputation

ranQ Trust Score of Stefan Roggo und Christoph Widmer Architekten GmbH: 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 Roggo und Christoph Widmer Architekten GmbH 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 Roggo und Christoph Widmer Architekten GmbH scores 77.2 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.86.512%
  • 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%
Stefan Roggo und Christoph Widmer Architekten GmbH scores 86.7 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).86.722%
Stefan Roggo und Christoph Widmer Architekten GmbH scores 6.0 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 35.6.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Stefan Roggo und Christoph Widmer Architekten GmbH 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

Klausstrasse 9
8008 Zurich
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-356.639.411
Founded
2016 · 10 years
Last commercial register change
June 19, 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.88.06%
  • 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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