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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior fit-outArneggKoster AG Holzwelten
Koster AG Holzwelten Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Koster AG Holzwelten is a carpentry business serving private and commercial projects. It plans and produces interior fit-outs, fire protection solutions and partition systems, and carries out carpentry and furniture-making work.

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Service area

Offering

Products & services

Industry:Interior fit-out
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4.1/5

Koster AG Holzwelten

✓ Offered
5
Fire protection & safety
Certified fire doors EI30–EI90, flood protection, fire-protection curtains, glazing, sliding doors and upgrades for listed buildings; consulting, fabrication and installation from a single source.
feco partition wall systems
Repositionable partition wall systems made of glass, wood or metal for flexible room division; including sound and fire protection, system warranty and solutions for office and commercial premises.
Interior fit-out & conversion
Interior fit-outs and conversions for private homes, commercial areas and public buildings; consulting, planning, fabrication and installation of kitchens, bathrooms, built-in wardrobes and renovations.
Solid wood furniture from crooked wood (bogengut®)
Solid wood furniture made from crooked wood as individual pieces; tables, benches and objects with precision cuts, drying, gluing and handcrafted finishing.
Marble wood (Myrai)
Marble wood made from Swiss timber with unique lines and patterns; development and production in Switzerland, without chemical additives, as a material and design offering.
Trust & reputation

ranQ Trust Score of Koster AG Holzwelten: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of November 2026

Koster AG Holzwelten scores 62.0 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.78.08%
Koster AG Holzwelten scores 95.9 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%
Koster AG Holzwelten scores 88.3 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).88.322%
Koster AG Holzwelten scores 33.6 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 35.37.14%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.30.04%
Qualifications+0.00

Koster AG Holzwelten reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. 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.

Press

Media

February 12, 2026Media
Marmorholz aus dem Labor: Pilzveredeltes Holz «Myrai» kommt auf den Markt
baublatt.ch
October 14, 2021Media
«Man muss gehen, wenn es wehtut»: Chef der Koster AG Holzwelten übergibt den Betrieb seinem Sohn
tagblatt.ch

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Location

Bächigenstrasse 12
9212 Arnegg
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:00
Tue
07:30 - 12:00, 13:15 - 17:00
Wed
07:30 - 12:00, 13:15 - 17:00
Thu
07:30 - 12:00, 13:15 - 17:00
Fri
07:30 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-101.073.456
Founded
1997 · 29 years
Last commercial register change
January 21, 2026
Employees
51 to 100

Active in 1 of 26 cantons

  • SGSt. Gallen
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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