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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSite PreparationMüswangenKoch Bauunternehmung AG
Koch Bauunternehmung AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Koch Bauunternehmung AG is a small construction company offering new builds and renovations, including sewer, reinforced concrete and masonry work. The company also installs anhydrite flow-screed underlays, carries out core drilling (40–300 mm) and executes exterior works such as garage forecourts and stone cladding.

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Products & services

Industry:Site Preparation
✓ Offered5
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4.0/5

Koch Bauunternehmung AG

New construction
Single-family houses, multi-family houses as well as agricultural and public buildings; drainage works, reinforced concrete works, masonry work and subfloors in anhydrite.
Renovation
Bathroom and kitchen remodels, demolition of wall and floor coverings, rough and finishing plastering, core drilling, lightweight partition walls and tiling work.
Anhydrite flowing screed
Subfloors made of anhydrite flowing screed, seamless installation up to 40 m², variants with floor-covering-ready solutions for ceramic tiles, vinyl or parquet.
Surroundings
Garage forecourts, small parking facilities with parking stoppers and cladding of concrete retaining walls with granite.
Core drilling
Core drilling for water supply lines, vertical service zones for electrical, sanitary and heating pipework, and openings for outdoor units and air-conditioning systems.
Trust & reputation

ranQ Trust Score of Koch Bauunternehmung AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Koch Bauunternehmung AG scores 65.2 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.95.08%
Koch Bauunternehmung AG scores 74.8 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.75.012%
  • 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%
Koch Bauunternehmung 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%
Koch Bauunternehmung AG scores 2.0 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 35.2.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Koch Bauunternehmung AG reaches a ranQ Trust Score of 4.0 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 October 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.

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Location

Bühlstrasse 19.1
6289 Müswangen
Opening hours
Mon
07:00 - 18:00
Tue
07:00 - 18:00
Wed
07:00 - 18:00
Thu
07:00 - 18:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-167.672.280
Founded
2019 · 7 years
Last commercial register change
May 12, 2023
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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