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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSchlierenGrünstein GmbH
Grünstein GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Grünstein GmbH is a construction company offering project management, building and civil engineering, renovations and general planning services. The firm undertakes residential, commercial and industrial buildings as well as public, healthcare, infrastructure and office projects.

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Offering

Products & services

Industry:Building Construction
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3.9/5

Grünstein GmbH

Civil Engineering
General Contractors
✓ Offered4
Building construction and civil engineering
Building construction for residential, commercial, industrial and public buildings; civil engineering including earthworks, foundation construction, infrastructure projects, exterior areas as well as road and water construction.
Conversion & renovation
Conversion and renovation work for buildings and rooms; interior renovations, painting and wallpapering, floor coverings, ceiling linings as well as façade and exterior renovations.
General planning
General planning for private and commercial construction projects; coordination from concept phase through completion, including architecture, technical infrastructure and liaison with authorities.
Project management
Project management for construction projects including cost control, schedule and milestone planning, coordination of all parties up to handover of the keys, as well as quality control and risk management.
Trust & reputation

ranQ Trust Score of Grünstein GmbH: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 54% · As of October 2026

Grünstein GmbH 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%
Grünstein GmbH scores 67.8 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.64.612%
  • 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%
Grünstein 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%
Grünstein GmbH scores 7.1 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 35.7.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grünstein GmbH reaches a ranQ Trust Score of 3.9 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

Grabenstrasse 1
8952 Schlieren

At a glance

Legal form
Limited Liability Company
UID
CHE-369.674.256
Founded
2021 · 5 years
Last commercial register change
May 4, 2026
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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