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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSils/Segl Mariatannobau ag
tannobau ag Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Tannobau AG is the execution of construction, civil engineering, renovation and refurbishment projects in the building industry, including planning, execution and completion of construction projects for various purposes such as residential buildings, houses, hotels, industry, commerce and public facilities.

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Offering

Products & services

Industry:Building ConstructionBuilding Maintenance
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3.9/5

tannobau ag

Civil Engineering
Masonry Work
✓ Offered3
Conversions and Renovations
Conversion and renovation work for apartments, houses and hotels; bathroom refurbishments, kitchen refurbishments, apartment renovations, Engadinerhaus restorations as well as crack repairs.
Building construction
Conversions, renovations and new builds in building construction; single-family houses, multi-family houses, garden paths, fireplaces, seating areas, garage extensions, walls and natural stone flooring.
Civil engineering
Civil engineering work for construction projects and references such as bridge construction and chairlift projects; in addition to building construction and conversion work in the Engadin.
Trust & reputation

ranQ Trust Score of tannobau ag: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

tannobau ag scores 51.4 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.66.724%
  • 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.35.08%
tannobau ag scores 87.1 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.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%
tannobau 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%
tannobau ag scores 6.6 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 35.6.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

tannobau ag reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.5 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 October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle4.52
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Davous Muntatsch 9
7514 Sils/Segl Maria
Opening hours
Mon
08:00 - 12:00, 13:30 - 18:00
Tue
08:00 - 12:00, 13:30 - 18:00
Wed
08:00 - 12:00, 13:30 - 18:00
Thu
08:00 - 12:00, 13:30 - 18:00
Fri
08:00 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.270.871
Founded
2008 · 18 years
Last commercial register change
February 26, 2019
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.85.03%
    • Full methodology

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