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

About the company

The core activity of E. Buff Bau AG is the provision of construction services, particularly in the fields of building construction, civil engineering and renovation of buildings and infrastructure. This includes, among other things: new construction, extension, conversion and renovation of buildings; creation of water pipes, sewage pipes and other supply lines; core drilling for water pipes, heating pipes and electrical cables; execution of masonry work, plastering work, sealing work and drywall construction; renovation and renovation of sewage pipes, including inliner renovation; creation of breakthroughs for heating pipes and electrical cables. The company offers individual solutions for its customers and works on various construction projects.

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Products & services

Industry:Building ConstructionBuilding Maintenance
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Ernst Buff Bau AG

Civil Engineering
✓ Offered6
Building construction
New builds, extensions, conversions, garages and other building contractor work, including foundations for winter gardens and other building construction projects.
Civil engineering
Water pipes, other supply lines, renewal of wastewater pipes and infiltration systems as part of civil engineering work.
Masonry work
Chipping works, core drilling, plastering work, sealing works, coatings and dry construction in different sizes and finishes.
Renovations / refurbishment
Renovations and refurbishment of the kitchen, bathroom, garage and garden wall, as well as maintenance and modernisation of components.
Wastewater pipes
Renovation of wastewater pipes for foul water or rainwater, including pipe replacement and liner rehabilitation.
Core drilling
Core drilling and the necessary openings for water pipes, heating lines and electrical cables in construction projects.
Trust & reputation

ranQ Trust Score of Ernst Buff 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.

Ernst Buff 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%
Ernst Buff Bau AG scores 85.5 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.55.07%
Ernst Buff Bau AG scores 85.0 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).85.022%
Ernst Buff Bau AG scores 7.4 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 35.7.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ernst Buff 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

Pelikanweg 6
3074 Muri B. Bern
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.962.085
Founded
1989 · 37 years
Last commercial register change
November 4, 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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