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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,888 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionUrtenen-SchönbühlKeller AG Bauen & Erhalten
Keller AG Bauen & Erhalten Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Keller AG is the provision of construction services, particularly in the areas of new buildings, extensions, maintenance work, conversions, renovations and environmental work.

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Offering

Products & services

Industry:Building Construction
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Keller AG Bauen & Erhalten

7
Building construction
New builds, extensions, conversions and storey additions for single-family houses, garages, conservatories and new room layouts.
Renovation and maintenance
Maintenance and renovations of facades, concrete, garden walls, pipes and shafts, terraces and balconies, as well as exposed masonry and surfacing damage.
Conversions and extensions
Conversions and extensions of farmhouses, cellar rooms, garages, kitchens and bathrooms, conservatories, as well as installation of steel beams and storey additions.
New builds and external works
New builds for single-family houses as well as external works with natural stone walls, concrete walls, composite stone paved areas, noise barrier walls and infiltration systems for roof water.
Construction consulting
Damage analyses, purchase consulting and conversion consulting for construction projects and existing buildings.
Construction management
Building surveys, preparing estimates, minor structural calculations, planning work and building permit applications for smaller conversions.
Customer wishes
Vault and arch walls, exposed masonry, natural stone walls, pizza ovens and fireplaces, as well as a wild bee hotel in a gabion wall.
Trust & reputation

ranQ Trust Score of Keller AG Bauen & Erhalten: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Keller AG Bauen & Erhalten has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Keller AG Bauen & Erhalten scores 76.6 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.79.212%
  • 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 AG Bauen & Erhalten 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%
Keller AG Bauen & Erhalten scores 8.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.8.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller AG Bauen & Erhalten reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Hohrainstrasse 25a
3322 Urtenen-Schönbühl

At a glance

Legal form
Corporation
UID
CHE-223.457.707
Founded
2018 · 8 years
Last commercial register change
August 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.
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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