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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsLaufenburgERNE AG Bauunternehmung
ERNE AG Bauunternehmung Logo
Verified· 4 sourcesTrust Score
Summary

About the company

ERNE AG Bauunternehmung is a construction company that executes building and civil engineering projects and operates as a builder, general contractor and total contractor. Its services include new construction, infrastructure and water-construction works, renovation, concrete drilling and other specialist construction services, as well as engineering, BIM and sustainability-related services.

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Products & services

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4.4/5

ERNE AG Bauunternehmung

✓ Offered9
Building construction
New construction, industrial construction, commercial construction, data centres, water engineering and residential construction; execution of building construction projects from planning stage to completion.
Civil engineering
Road construction, infrastructure works and specialised deep civil engineering for projects in underground areas and along traffic routes; civil engineering projects in public and private environments.
Conversion and renovation
Conversions, renovations and refurbishments in existing buildings; including planning and execution for buildings in operation, maintenance and adaptations to new needs.
General contractor and total contractor (ERNEplus GU/TU)
Full services from planning and coordination through turnkey realisation; as general contractor or total contractor with project responsibility.
Building specialities
Masonry work for customers, drilling and cutting concrete, building protection and demolition for special tasks and demanding interventions on site.
New construction
New buildings for residential, commercial and industrial construction as well as complex projects with high structural and logistical requirements.
Infrastructure construction
Construction of infrastructure facilities and transport structures, including diversions, stops and other public construction projects.
Road construction
Road construction and road rehabilitation with resurfacing, traffic guidance and work while traffic is ongoing.
Specialised deep civil engineering
Specialised deep civil engineering for challenging excavation pits, undercrossings and positioning works in confined spaces or with difficult geological conditions.
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 100% · 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 99.0 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.96.07%
ERNE AG Bauunternehmung scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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 AG Bauunternehmung scores 80.0 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: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.60.04%
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. 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.

Press

Media

October 15, 2025Media
Erne AG: Maximilian Nägele ist neuer Geschäftsführer
baublatt.ch
October 2, 2025Media
Neuer Geschäftsführer bei Erne Bau
nfz.ch
October 1, 2025Media
Maximilian Nägele leitet neu die Erne AG Bauunternehmung mit Sitz in Laufenburg
aargauerzeitung.ch
October 1, 2025Media
Erne: Bau-Tochter mit neuem Geschäftsführer
immobilienbusiness.ch
January 2, 2025Media
Erne Gruppe mit neuem Verwaltungsrat
immobilienbusiness.ch
December 1, 2020Media
Geschäftsführer Christoph Saxer verlässt Erne AG schon nach einem Jahr wieder
aargauerzeitung.ch

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Location

Baslerstrasse 5
5080 Laufenburg

At a glance

Legal form
Corporation
UID
CHE-110.353.363
Founded
2003 · 23 years
Last commercial register change
March 27, 2026
Employees
101 to 500
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.100.03%
    • Full methodology

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