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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint742,807 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionArneggKoster AG Holzwelten
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Koster AG Holzwelten

Summary

About the company

The core activity of Koster AG Holzwelten is the creation of carpentry work, particularly the manufacture and installation of security solutions, partition systems, interior fittings, furniture and renovation and restoration work using wood construction.

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Offering

Products & services

Industry:Interior Construction
✓ Offered5
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.
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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

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