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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber constructionKüssnacht Am RigiKost Holzbau AG
Kost Holzbau AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Kost Holzbau AG is a timber construction company that builds residential, commercial and public buildings using modern timber systems. Its services include extensions and additions, renovations and refurbishment—including work on historic buildings—as well as façades and timber terraces.

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Service area

Offering

Products & services

Industry:Timber construction
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4.3/5

Kost Holzbau AG

✓ Offered11
Timber construction
Timber construction using modern timber system building for single- and multi-family houses, commercial buildings and public buildings; including extensions, renovations, re-cladding and timber terrace flooring.
New construction
New construction of single- and multi-family houses, commercial buildings and public buildings using modern timber system building.
Storey extensions and additions
Storey extensions and additions to create more space in existing buildings.
Renovations and refurbishment
Renovations and refurbishments of historic and listed buildings using traditional craftsmanship and improved energy efficiency.
Façade construction
Façade construction with timber frame structures and timber façades for new builds and renovations; also in hybrid and mixed construction methods.
Timber terrace flooring
Timber terrace flooring for terraces, balconies, pool surrounds and wellness areas, including installation and periodic maintenance.
Advisory for clients and architects
Advice on design options, structural calculations, thermography, energy, fire and sound protection, material selections, interior fit-out and Minergie specialist planning.
Tendering / bill of quantities preparation
Preparation of bills of work and tender documents, as well as support with submissions, contract execution and final inspections.
Detailed design / construction documentation
Construction documentation based on architects' projects with structural calculations, 3D CAD, visualisations, coordination of specialist planning and digital exchange.
Realisation / execution
Realisation of timber system buildings with prefabricated element construction, precise execution, interior fit-out and partial project management for timber construction.
Service and repairs
Service and maintenance work, façade inspections, roof service and repair work, even after completion and handover of the keys.
Trust & reputation

ranQ Trust Score of Kost Holzbau AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 100% · As of November 2026

Kost Holzbau AG scores 75.8 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.74.024%
  • 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.70.510%
  • 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.88.08%
Kost Holzbau AG scores 94.3 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%
Kost Holzbau AG 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%
Kost Holzbau AG scores 42.9 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 35.85.74%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Kost Holzbau AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 15 customer reviews. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.615
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

May 28, 2024Media
Neues Firmenherzstück gezeigt
bote.ch
May 25, 2024Media
Tag der offenen Tür bei Kost
bote.ch
March 29, 2023Media
«Hier im Betrieb sagen wir uns alle du»
bote.ch
October 1, 2022Media
Kost Holzbau AG erhält Gütesiegel
bote.ch

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Location

Alte Zugerstrasse 5
6403 Küssnacht Am Rigi
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.898.197
Founded
1978 · 48 years
Last commercial register change
September 26, 2025
Employees
51 to 100

Active in 1 of 26 cantons

  • SZSchwyz
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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