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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceElsauChristian O. Kurz - Umbau und Bauleitung
Christian O. Kurz - Umbau und Bauleitung Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of COKBAU is the construction management and renovation of houses, apartments and terraces, including renovation, rehabilitation and modernization. The company offers services such as evaluation and planning, construction management, renovation and refurbishment, with a focus on quality work, efficient working methods and satisfied customers.

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Products & services

Industry:Building MaintenanceTimber Construction & Carpentry
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Christian O. Kurz - Umbau und Bauleitung

Masonry Work
✓ Offered8
Construction management
Construction management for renovation and modernization projects in the house, the apartment or on the terrace; schedule-based coordination, involving specialist trades when needed.
Planning
Planning of renovation projects with a personal meeting, site visit and presentation of ideas as a basis for collaboration.
Renovation and modernization
Renovation and modernization of the house, apartment and terrace; inside and outside, from cellar insulation to roof conversion, kitchen and bathroom.
Timber construction
Timber construction work as part of renovation projects, inside and outside, including work with wood and related fit-outs.
Lightweight construction
Lightweight construction work as part of renovations and fit-outs in the living area, together with other interior finishing works.
Terrace works
Renovation and modernization work on terraces; also, on the scope of services side, with a note about involving external tradespeople.
Parquet
Parquet works related to renovation and interior fit-out, as part of furnishing and flooring works.
Building submission
Building submissions in connection with renovation projects, as part of the planning and administrative preparation of the project.
Trust & reputation

ranQ Trust Score of Christian O. Kurz - Umbau und Bauleitung

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

Christian O. Kurz - Umbau und Bauleitung 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.
x
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%
Christian O. Kurz - Umbau und Bauleitung scores 77.5 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.97.712%
  • 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%
Christian O. Kurz - Umbau und Bauleitung scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Christian O. Kurz - Umbau und Bauleitung 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%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

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

Knowledge

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Location

Schluck 1
8352 Elsau

At a glance

Legal form
Sole proprietorship
UID
CHE-105.268.817
Founded
2012 · 14 years
Last commercial register change
December 12, 2012
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.67.06%
  • 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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