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

About the company

Diagonal Architekten AG is an architectural firm specializing in the planning and realization of construction projects. The company's core activity includes the creation of architectural and building plans, the conduct of competitions, project development, and construction management. The company works on various projects, including residential buildings, schools, healthcare buildings, commercial buildings, and public buildings.

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Offering

Products & services

Industry:Architecture FirmsConstruction & Project Management
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Diagonal Architekten AG

✓ Offered8
Architectural services for residential buildings
Residential developments, multi-family houses, residential houses and senior housing; design, planning and implementation of new-build projects and conversions for residential construction.
Architectural services for educational buildings
School facilities, school buildings, vocational schools and cantonal schools; planning of new builds, extensions and competition projects for educational buildings.
Architectural services for healthcare buildings
Clinics, hospitals and specialist physician centres; architecture, planning and project development for healthcare buildings with varying levels of complexity.
Architectural services for commercial and business buildings
Commercial buildings, depots, workshop buildings, office buildings and shopping centres; planning of functional work and occupancy buildings.
Architectural services for infrastructure buildings
Infrastructure buildings such as depots, fire and police centres, parking garages and other public facilities; planning and architectural elaboration.
Competition and study services
Architecture competitions, study assignments and overall performance competitions for a range of building tasks; design, assessment and further development of projects.
Conversion and change-of-use planning
Conversions, renovations and change-of-use of existing buildings; further development, adaptation and architectural enhancement within the existing fabric.
Construction and project management
Construction site supervision, project management and coordination of architectural projects; support from planning through execution, including ongoing project control.
Trust & reputation

ranQ Trust Score of Diagonal Architekten AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Diagonal Architekten AG scores 63.9 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.70.824%
  • 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.27.910%
  • 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.88.08%
Diagonal Architekten 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%
Diagonal Architekten 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%
Diagonal Architekten AG scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Diagonal Architekten 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 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Hier entsteht die Karte
Katharina-Sulzer-Platz 10
8400 Winterthur

At a glance

Legal form
Corporation
UID
CHE-105.951.512
Founded
2006 · 20 years
Last commercial register change
March 24, 2025
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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