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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsWinterthurZettelwerk AG
Zettelwerk AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Zettelwerk AG is construction management, particularly the planning, consulting and implementation of complex construction projects in the areas of high-rise buildings, retail, temporary and office buildings. This also includes specific services such as architecture, energy consulting, fire protection planning, monument preservation and protection, as well as visualizations and project visualization.

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Offering

Products & services

Industry:Architecture FirmsConstruction & Project Management
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Zettelwerk AG

✓ Offered9
Project development
Project development for complex construction projects in above-ground construction, retail, as well as temporary and office buildings; with a focus on projects that are critical in terms of cost, schedule and quality.
Architecture
Architecture for construction projects in Winterthur, Zürich and Switzerland; including consulting, concepts and support around building.
Construction management
Construction management for critical construction projects; with consulting and support with regard to costs, deadlines and quality.
Site supervision
Site supervision for complex projects; including project management and implementation on site.
Construction consulting
Construction consulting with support in decisions for construction projects; taking costs, deadlines and quality into account.
Visualisations
Visualisations and renderings for projects and sales documents; for presenting concepts and construction projects.
Interior design
Interior design for conversions, concept development and interior spaces; from conception to execution.
Fire protection planning
Fire protection planning as a supporting planning service for construction projects.
Monument preservation and heritage protection
Consulting and support for construction projects in the field of monument preservation and heritage protection.
Trust & reputation

ranQ Trust Score of Zettelwerk AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Zettelwerk AG scores 63.8 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.65.024%
  • 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.49.510%
  • 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.78.08%
Zettelwerk AG scores 87.2 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.95.212%
  • 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%
Zettelwerk 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%
Zettelwerk AG scores 42.9 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 35.42.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zettelwerk AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.3 out of 5 stars from 6 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
4.3
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle4.36
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Seidenstrasse 27
8400 Winterthur
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-225.377.166
Founded
2013 · 13 years
Last commercial register change
September 3, 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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