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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionKreuzlingenKeller Construction GmbH
Keller Construction GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Keller Construction GmbH provides construction planning, project development, site management and execution services with a focus on timber construction, including interior fit-out, drywall, pitched roofs, facades and scaffolding.

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Offering

Products & services

Industry:Building ConstructionGeneral Contractors
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3.9/5

Keller Construction GmbH

✓ Offered7
Building planning
Building planning, building permit submission, project development, execution planning, site management, cost control as well as client advisory and support for renovation, extension and new-build projects.
Timber construction
Timber construction for renovation, extension and new-build projects, from execution through to assisted realisation within the scope of building planning.
Interior finishing
Interior finishing for building projects, in addition to the work in the area of timber construction, renovation, extension and new-build.
Drywall construction
Drywall construction as an execution service for renovation, extension and new-build projects.
Pitched roof
Pitched roof works as part of the execution of building projects.
Facades
Facade works as an execution service within the scope of renovation, extension and new-build projects.
Scaffolding
Scaffolding as an accompanying execution service for building, renovation and new-build projects.
Trust & reputation

ranQ Trust Score of Keller Construction GmbH: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Keller Construction GmbH scores 63.5 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.73.124%
  • 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.35.310%
  • 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.70.08%
Keller Construction 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%
Keller Construction 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%
Keller Construction GmbH scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller Construction GmbH reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Wiesenstrasse 3
8280 Kreuzlingen

At a glance

Legal form
Limited Liability Company
UID
CHE-158.750.656
Founded
2020 · 6 years
Last commercial register change
January 22, 2025
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%
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