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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionMarthalenZimmerei Werner Keller GmbH
Zimmerei Werner Keller GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Werner Keller Zimmerei – Holzbau is the execution of traditional timber construction, element construction, as well as the maintenance and renovation of old half-timbered houses, particularly in the Zurich wine region.

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Offering

Products & services

Industry:Interior ConstructionTimber Construction & Carpentry
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3.7/5

Zimmerei Werner Keller GmbH

✓ Offered6
Timber construction work / wood structures
Timber construction work of all kinds, traditional timber construction, element construction, as well as maintenance work and renovations of old half-timber houses.
Renovations and consulting
Interior fit-out, planning for conversions and renovations, consulting for listed and historic buildings, support during discussions with municipal offices and authorities.
Staircase and railing construction
Design and fabrication of new staircases and railings for apartments and offices, including various railing variations.
Insulation and sealing
Façade insulation and other insulation using Holzflex, Isofloc, hemp, sheep’s wool as well as glass and mineral wool; for a better indoor climate and less heat loss.
Roofing works
Renewal of roof coverings including substructure for new builds, conversions and renovations.
Flooring and wood panelling work
Installation of wooden floorboards and other floor coverings, as well as ceiling and wall linings made of wood, Täfer, boarding, plasterboard, Fermacell and acoustic panels.
Trust & reputation

ranQ Trust Score of Zimmerei Werner Keller GmbH: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

Zimmerei Werner Keller GmbH scores 51.1 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.60.724%
  • 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.40.910%
  • 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.35.08%
Zimmerei Werner Keller GmbH scores 70.2 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.70.212%
  • 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%
Zimmerei Werner Keller GmbH scores 83.3 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).83.322%
Zimmerei Werner Keller GmbH scores 8.6 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 35.8.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zimmerei Werner Keller GmbH reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 4.0 out of 5 stars from 4 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
4
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle44
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Mötscheweg 1
8460 Marthalen
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:30
Tue
07:00 - 12:00, 13:00 - 17:30
Wed
07:00 - 12:00, 13:00 - 17:30
Thu
07:00 - 12:00, 13:00 - 17:30
Fri
07:00 - 12:00, 13:00 - 17:30
Sat
08:00 - 12:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-305.995.686
Founded
2020 · 6 years
Last commercial register change
September 30, 2020
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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