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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding contractorLenzerheide/LaiBergamin Bau AG
Bergamin Bau AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Bergamin Bau AG is a building and civil engineering contractor offering renovation and extension work, natural stone construction, and construction in alpine terrain. Its services also include demolition and safety work, as well as concrete drilling and cutting.

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Service area

Offering

Products & services

Industry:Building contractor
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Bergamin Bau AG

Civil works
Renovation
Excavation
✓ Offered8
Building construction
General building construction for new builds and construction projects in the building and housing sector.
Civil engineering
General civil engineering for construction work in the underground and infrastructure sector.
Renovation and extension
Renovation and extension work for existing buildings, including adjustments and expansions.
Natural stone work
Natural stone work for construction and design projects, in particular in connection with alpine structures and special requirements.
Demolition and securing works
Demolition and securing works for building sites, conversions and special situations in alpine terrain.
Concrete drilling and milling
Concrete drilling and milling works for openings, adjustments and technical interventions in existing structures.
Work in alpine terrain
Specialist work in alpine terrain for construction, securing and renovation operations under difficult topographic conditions.
“Turbo” service
Quick service for minor work and emergencies.
Trust & reputation

ranQ Trust Score of Bergamin Bau AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of November 2026

Bergamin Bau AG scores 63.9 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.70.824%
  • 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.27.910%
  • 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%
Bergamin Bau AG scores 74.1 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.64.612%
  • 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.70.07%
Bergamin 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%
Bergamin Bau AG scores 2.9 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 35.2.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bergamin Bau AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Plam dil Bläsi 4
7078 Lenzerheide/Lai
Opening hours
Mon
07:30 - 17:30
Tue
07:30 - 17:30
Wed
07:30 - 17:30
Thu
07:30 - 17:30
Fri
07:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-384.362.835
Founded
2021 · 5 years
Last commercial register change
June 17, 2026
Employees
11 to 20

Active in 1 of 26 cantons

  • GRGrisons
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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