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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSalgeschConstantin Bau AG
Constantin Bau AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Constantin Bau AG is a construction company providing building, civil engineering and earthworks services. Its offerings include excavation and trenching, demolition, sewer and utility works, natural stone masonry and the construction of block retaining walls, with projects ranging from small masonry works to residential developments.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered6
Building construction
Building construction for small masonry jobs for customers, demolition work and complex residential developments; support from implementation through to completion.
Civil engineering
Civil engineering including sewer systems, utility lines, protection of waterways, natural stone masonry and concrete construction; turnkey execution from a single source.
Earthworks
Earthworks including excavation and trenching, vine uprooting works and construction of riprap stone walls; professional execution with our own construction machinery.
Demolition work
Demolition work for buildings and construction objects as part of building construction and earthworks projects.
Riprap stone walls
Riprap stone walls for residential and single-family home projects; references show the execution across several construction projects.
Site servicing
Site servicing works for construction projects, including trenching and utility-line-related preparations.
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4.1/5

Constantin Bau AG

Trust & reputation

ranQ Trust Score of Constantin Bau AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Constantin Bau 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%
Constantin Bau AG scores 94.3 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%
Constantin Bau 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%
Constantin Bau AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Constantin Bau AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». 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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Location

Gemmistrasse 20
3970 Salgesch

At a glance

Legal form
Corporation
UID
CHE-112.699.401
Founded
2005 · 21 years
Last commercial register change
November 29, 2024
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.
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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