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

About the company

ERNE AG Bauunternehmung is a construction company providing building and civil engineering works, refurbishments and specialist services such as concrete drilling, structural protection and demolition. The company operates as a contractor, general and total contractor and offers engineering, BIM and sustainability services.

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Products & services

Industry:General ContractorsSite Preparation
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4.4/5

ERNE AG Bauunternehmung

✓ Offered
5
Building construction
New-build, industrial construction, commercial construction, data centers, water engineering and residential construction in building construction.
Civil engineering
Road construction, infrastructure construction and special deep foundation work in civil engineering.
Conversion and refurbishment
Alterations, renovations and refurbishments for existing buildings, including maintenance, masonry work for clients, building protection, as well as drilling and cutting through concrete.
General contractor and total contractor (ERNEplus)
Overall services for GU and TU projects, from consultation through development and planning to turnkey delivery.
Construction specialties
Masonry work for clients, concrete drilling, building protection and demolition for special construction requirements.
Trust & reputation

ranQ Trust Score of ERNE AG Bauunternehmung: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

ERNE AG Bauunternehmung scores 73.6 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.77.424%
  • 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.52.910%
  • 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%
ERNE AG Bauunternehmung scores 89.1 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.90.07%
ERNE AG Bauunternehmung 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%
ERNE AG Bauunternehmung scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ERNE AG Bauunternehmung reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 7 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
4.9
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.97
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Langgass 5
5244 Birrhard

At a glance

Legal form
Branch
UID
CHE-179.302.269
Founded
2009 · 17 years
Last commercial register change
January 9, 2009
Employees
51 to 100
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.
76.0
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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