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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureOwner's RepresentativeWindischBau+Kon AG
Bau+Kon AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Bau+Kon AG is the construction management and direction of complex projects in the field of public buildings, residential buildings, commercial and industrial buildings. This includes the planning, coordination and supervision of construction projects, including communication with clients, architects and other stakeholders.

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Products & services

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Bau+Kon AG

Site supervision & construction management
Construction management and site supervision for complex building projects, including site inspections, monitoring of the works, schedule and cost control, and representation of the client.
Construction cost planning & construction accounting
Construction cost planning and construction accounting from the preliminary project through to final settlement, including ongoing cost control, review of contractor invoices, offers for additional costs, and final accounts.
Tenders
Preparation of bill of quantities and tenders for architecture and construction management offices as well as for clients and architects, individually or as a complete package for a building project.
Client representation on site
Close exchange with the client, reliable representation on the construction site, and coordination of execution in the ongoing building project.
Delivery of complex construction projects
Delivery of complex projects in public, residential, commercial and industrial construction, including new builds, renovations, conversions and extensions.
Trust & reputation

ranQ Trust Score of Bau+Kon AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Bau+Kon 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%
Bau+Kon AG scores 74.8 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.75.012%
  • 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.55.07%
Bau+Kon 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%
Bau+Kon AG scores 8.6 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 35.8.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Bau+Kon 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 October 2026.

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

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Location

Alte Spinnerei 9
5210 Windisch
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 15:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-192.842.183
Founded
2019 · 7 years
Last commercial register change
November 4, 2021
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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