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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringBiel/BienneBau4U Holding AG
Bau4U Holding AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Bau4U Holding AG is a construction company active in pipeline construction, civil and road works, directional jacking and sewer rehabilitation. The company carries out excavation work, utility line installation, road construction and renovation work, as well as trenchless rehabilitation services.

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Products & services

Industry:Civil EngineeringCivil Engineering Firms
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Bau4U Holding AG

Specialized Construction Activities
Holding Companies
✓ Offered4
Pipeline Construction
Gas, water and wastewater pipelines; service connections through to new transmission lines in PE, cast iron and stainless steel, including trenchless installation.
Civil and Road Construction
Excavation of trenches, new construction or redesign of access roads and forecourts, asphalt rehabilitation, and renewal of wearing courses on entire road sections.
Trenchless Pipeline Installation
Directional jacking and horizontal directional drilling for underground pipelines, including crossings under roads, rail lines and waterways without open excavation.
Sewer Rehabilitation
Trenchless rehabilitation of house connections and sewers using liner methods, including cured-in-place lining, point lining, tightness testing and manhole rehabilitation.
Trust & reputation

ranQ Trust Score of Bau4U Holding AG: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 54% · As of October 2026

Bau4U Holding AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Bau4U Holding AG scores 53.4 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.25.012%
  • 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%
Bau4U Holding AG scores 83.3 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).83.322%
Bau4U Holding AG scores 13.1 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 35.13.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bau4U Holding AG reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Secure profile

Location

Längfeldweg 50
2504 Biel/Bienne

At a glance

Legal form
Corporation
UID
CHE-498.734.412
Founded
2025 · 1 year
Last commercial register change
August 25, 2025
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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