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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding contractorSchaffhausenGlatthaar Keller AG
Glatthaar Keller AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Glatthaar Keller AG builds prefabricated cellars and foundation slabs for detached, terraced and multi-family homes. Its services also include cellar extensions, underground garages, foundations and precast concrete stairs.

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Offering

Products & services

Industry:Building contractorBuilding materials manufacturer
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Glatthaar Keller AG

✓ Offered8
Basement construction
Basements and floor slabs for single-family, terraced and multi-family houses, including cellar extensions, underground garages, foundations, staircases and a waterproofing concept.
Floor slabs
Floor slabs for residential buildings, garages and carports, with drainage lines as well as backflow prevention or lifting systems under the floor slab.
Underground garage construction
Underground garages with stair or lift towers, as part of construction projects in residential and commercial building.
Basement extensions
Basement extensions to existing buildings, coordinated with the existing building structure and the specific construction project.
Concrete staircases
Straight, spiral or staircases with landings made of concrete, suitable for basement, residential and underground garage projects.
Building on a slope
Multi-storey construction for building projects on a slope, with structural, engineering and waterproofing solutions matched to site conditions.
Waterproofing systems (Aqua-Safe)
Patented Aqua-Safe waterproofing concept, matched to construction projects and site conditions.
Insulation work to Minergie standard
Insulation work to the Minergie standard for basement and floor-slab projects, using prefabricated concrete components that can be installed quickly.
Trust & reputation

ranQ Trust Score of Glatthaar Keller AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Glatthaar Keller AG 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%
Glatthaar Keller AG scores 95.8 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.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.96.07%
Glatthaar Keller AG 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%
Glatthaar Keller AG scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Glatthaar Keller AG 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 November 2026.

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

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Location

Mühlentalsträsschen 9
8200 Schaffhausen

At a glance

Legal form
Corporation
UID
CHE-100.747.192
Founded
2000 · 26 years
Last commercial register change
November 21, 2024
Employees
101 to 500
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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