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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsWürenlosEri GU AG
Eri GU AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of EriGU AG encompasses the provision of services in the field of construction, particularly: masonry work, concrete drilling and milling, site management, conversions and renovations, as well as general contracting. Thus, the company offers a wide range of construction services for private, commercial and public clients.

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Products & services

Industry:General Contractors
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3.7/5

Eri GU AG

5
General contracting (GC)
Planning and execution of prefabricated houses, from shell construction to a turnkey owner-occupied home, including cross-trade organization and coordination of the installation.
Construction company for building and civil engineering
Above-ground and civil engineering construction for residential and commercial properties, including planning, engineering services, erection of structures, foundations, sewer and pipe construction, earthworks and drainage.
Conversions and renovation
Conversions, renovations and modernisations for existing properties, including energy-efficiency retrofits, masonry work, concrete processing and coordinated execution.
Customer masonry
Masonry work of all kinds for new builds, conversions, renovations and refurbishments, including insulation work, façade refurbishments, demolitions, dismantling and disposal.
Concrete drilling and milling
Concrete processing with drilling and milling works for new builds, conversions and renovation, for example for ducts/passages, installations and adjustments to concrete elements.
Trust & reputation

ranQ Trust Score of Eri GU AG: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

Eri GU AG scores 57.6 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.72.124%
  • 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.35.08%
Eri GU AG scores 67.5 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.58.012%
  • 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%
Eri GU AG scores 83.3 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).83.322%
Eri GU AG scores 0.6 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 35.0.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Eri GU AG reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 4.8 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
4.8
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle4.84
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Landstrasse 52
5436 Würenlos
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-376.218.521
Founded
2022 · 4 years
Last commercial register change
February 5, 2026
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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