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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,888 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionAmmerzwil BeHolzbau Zimmermann GmbH
Holzbau Zimmermann GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company's core activity is timber construction, particularly the creation of high-quality timber structures, including roof renovations, interior finishing, small orders and the installation of roof windows, doors and other wood products.

AI-generated
Offering

Products & services

Industry:Interior ConstructionTimber Construction & Carpentry
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4.1/5

Holzbau Zimmermann GmbH

✓ Offered4
Roof renovations
Roof renovations, repairs, renewals and maintenance work to extend the service life of roofs and to fix damage.
Roof window installation
Construction and installation of roof windows for more light and air, including custom solutions and installation in individual or entire roofs.
Interior fit-out
Interior fit-out with wood paneling, Fermacell, floor covering, lightweight partition walls, and installation of interior doors, windows, wall cladding and room dividers.
Small jobs in timber construction and carpentry
Small jobs in timber construction and carpentry, such as installation or repair of front doors, windows, shelving boards, cloakrooms, shelves and furniture items.
Trust & reputation

ranQ Trust Score of Holzbau Zimmermann GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Holzbau Zimmermann GmbH scores 80.1 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.85.424%
  • 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.68.910%
  • 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%
Holzbau Zimmermann GmbH scores 65.0 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.58.012%
  • 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%
Holzbau Zimmermann GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Holzbau Zimmermann GmbH scores 6.3 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 35.6.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Holzbau Zimmermann GmbH 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 14 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 14 reviews across all connected sources

Sources
GGoogle514
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Unterdorf 1
3257 Ammerzwil Be
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 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-415.352.183
Founded
2022 · 4 years
Last commercial register change
August 12, 2022
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.
88.0
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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