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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsZell Lu4K Architektur AG
4K Architektur AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

4K Architektur AG is an architectural firm providing architectural design and project planning for building projects. The website shows completed projects, design studies and contact information about the office.

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Offering

Products & services

Industry:Architecture FirmsGeneral Contractors
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4.1/5

4K Architektur AG

✓ Offered11
Architectural services
Residential construction, services, commercial and agricultural residential buildings for conversions and new builds; planning of projects to Minergie and Minergie-P standards.
General contracting
General contracting for residential ownership with a fixed price; planning and building of living space «all from a single source» in partnership with 4K Immobilien AG.
Design plans
Development of design plans for building projects and sites.
Renovation planning
Planning renovations and further development of existing buildings and facilities.
Energy concepts
Energy concepts for building projects with a focus on low heating energy consumption and energy efficiency.
Fire protection documentation
Preparation of fire protection documentation for building projects.
Maintenance planning
Planning of maintenance and upkeep for existing buildings.
Planning of photovoltaic systems
Planning photovoltaic systems for new builds and existing buildings.
Grant applications for the building programme
Submission of grant applications for the building programme in connection with energy measures.
GEAK expertise
Issuance of building energy certificates with an energy advisory report as a GEAK expert.
Precautionary evidence documentation
Precautionary evidence documentation in connection with building projects and buildings.
Trust & reputation

ranQ Trust Score of 4K Architektur AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

4K Architektur AG scores 69.4 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.75.024%
  • 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.40.910%
  • 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%
4K Architektur AG scores 85.5 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.55.07%
4K Architektur 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%
4K Architektur AG scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

4K Architektur AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Hier entsteht die Karte
St. Urbanstrasse 4
6144 Zell Lu
Opening hours
Mon
07:30 - 17:00
Tue
07:30 - 17:00
Wed
07:30 - 17:00
Thu
07:30 - 17:00
Fri
07:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-111.737.358
Founded
2004 · 22 years
Last commercial register change
April 18, 2013
Employees
1 to 10
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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