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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsEgerkingenErne Bau AG
Erne Bau AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Erne Bau AG is a construction company that operates as a builder and as a general and total contractor, providing main construction services including building construction, civil engineering, renovation, conversion and property maintenance.

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Offering

Products & services

Industry:General ContractorsSite Preparation
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4.4/5

Erne Bau AG

✓ Offered9
General contractor ERNEplus
Complete services for GU and TU projects; consulting, development and planning as well as execution through to handover ready for occupancy for new builds, conversions, renovations and small projects.
Building construction
New builds for industrial, commercial, residential and data-centre projects as well as hydraulic engineering; from executing complex construction projects to modern building construction projects.
Civil engineering
Road construction, infrastructure works and specialised deep excavation for demanding construction projects, including traffic facilities, bypasses, utility line installations and complex undercrossings.
Conversion
Conversion works and complex change-of-use conversions of existing buildings, including demolition, structural interventions and construction sequences in confined conditions.
Bricklaying
Masonry work for renovations and maintenance of existing buildings, in particular on façades and historic structures.
Concrete drilling
Concrete drilling and cutting of concrete for conversions, specialised work and structural interventions in existing structures.
Building protection
Protection and restoration of structures, particularly during renovations and to preserve existing building fabric.
Demolition
Demolition and dismantling works for conversions, renovations and new-build projects, also under tight space conditions and complex construction sequences.
Sustainability in construction
Sustainable construction methods and resource-efficient implementation, for instance through a circular economy and reused excavated material.
Trust & reputation

ranQ Trust Score of Erne Bau AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 100% · As of October 2026

Erne Bau AG scores 75.1 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.68.824%
  • 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.88.110%
  • 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%
Erne Bau AG scores 93.9 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%
Erne Bau AG scores 86.7 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).86.722%
Erne Bau AG scores 76.7 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: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.53.34%
Qualifications+0.00

Erne Bau AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 31 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.4
of 5

Aggregated from 31 reviews across all connected sources

Sources
GGoogle4.431
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

November 21, 2025Media
Wie Erne in Stein Massstäbe für nachhaltiges und wirtschaftliches Bauen setzt.
aargauerzeitung.ch
October 22, 2025Media
Ellaciao: Imagefilm läuft in Kinos im Werbeblock
persoenlich.com
October 2, 2025Media
Neuer Geschäftsführer bei Erne Bau
nfz.ch
October 1, 2025Media
Erne: Bau-Tochter mit neuem Geschäftsführer
immobilienbusiness.ch
January 25, 2025Media
Zukunft Bauen 2025 Branchenpionier Erne Holzbau
nzz.ch
September 12, 2024Media
Zukunftsversprechen -
swiss-architects.com

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Location

Sternengasse 5
4622 Egerkingen
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-105.774.167
Founded
1983 · 43 years
Last commercial register change
November 26, 2020
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.85.03%
    • Full methodology

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