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

About the company

The core activity of Jost Bau AG is the construction and execution of construction projects in various areas, including: residential construction, renovation and refurbishment, civil engineering, public buildings, industrial and commercial construction, and agricultural buildings. The company offers services such as planning, execution and acceptance of construction projects and positions itself as a reliable partner for builders.

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Offering

Products & services

Industry:Building ConstructionBuilding Maintenance
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Jost Bau AG

Civil Engineering
✓ Offered7
Residential construction
Single-family houses, condominiums and rental apartments, garages, carports and parking halls; sound workmanship for durable buildings.
Conversion and renovation
Roof extensions, add-ons and structures on existing buildings, extensions of existing building stock, material selection and exposed masonry; collaboration with authorities and heritage conservation.
Civil engineering
Utility lines for electricity, water and communications, cable and pipe trenches; building construction and civil engineering from one source.
Agricultural buildings
Stables, farmhouses and wagon sheds; stable and functional buildings for agricultural requirements.
Public buildings
Sports halls, multi-purpose facilities, school buildings, kindergartens, retirement and care homes, and swimming pools.
Industrial and commercial construction
New builds as well as adaptations and expansions for industry and commercial use, tailored to load-bearing capacity, access routes and room heights.
Masonry contractor
Demolition work, bases for washing machines, crack repairs and plastering; on-site by the hour, day or week.
Trust & reputation

ranQ Trust Score of Jost Bau AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 54% · As of October 2026

Jost Bau 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.
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%
Jost Bau AG scores 71.3 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.58.012%
  • 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.70.07%
Jost Bau AG 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%
Jost Bau AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Jost Bau AG reaches a ranQ Trust Score of 4.0 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

Riedtwilstrasse 18
3472 Wynigen

At a glance

Legal form
Corporation
UID
CHE-495.985.900
Founded
2022 · 4 years
Last commercial register change
November 18, 2024
Employees
11 to 20
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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