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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsZumikonbau construct services ag
bau construct services ag Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of bau construct services ag is the holistic management of real estate through the 5E principle, which covers the phases of development, creation, experience, maintenance and renewal in the life cycle of a property. This includes strategic planning, project development, construction, marketing, management and renewal of real estate. The company thus offers services in the areas of construction management, general contracting and total contracting.

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Offering

Products & services

Industry:General Contractors
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4.0/5

bau construct services ag

Owner's Representative
Real Estate Project Development
✓ Offered7
Client representation
Client representation for real estate projects, with responsibility for smooth project execution, proper implementation, compliance with quality requirements and ongoing information on project progress.
General contractor / total contractor
General contractor and total contractor for construction projects, taking over cost and schedule risk, acting as the sole contracting party and point of contact, and implementing according to specifications.
Construction management / project management
Construction management and project management with administrative and operational leadership, close contact with all stakeholders, and ongoing monitoring and management of planning, construction and execution processes.
General design
General design services for new builds and renovations, with overall responsibility for quality assurance of the design, in particular for design, functionality, building services and detailed fit-out.
Construction cost planning
Construction cost planning with budget control, assessment of services, success factors and risks across all phases, as well as active options and improvement proposals.
Fire protection quality assurance
Fire protection quality assurance for construction projects, including conception, design, execution and quality assurance during commissioning, as well as compliant implementation of fire protection requirements.
Real estate services
Real estate services in the early stage of construction, providing the basis for establishing condominium/unit ownership, preparation and execution of the sale of units, and supporting documentation.
Trust & reputation

ranQ Trust Score of bau construct services ag: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

bau construct services ag scores 67.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.75.024%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.40.910%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.78.08%
bau construct services ag scores 76.5 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.70.212%
  • 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%
bau construct services ag scores 85.0 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).85.022%
bau construct services ag scores 12.0 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 35.12.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

bau construct services ag reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Küsnachterstrasse 38
8126 Zumikon
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-367.725.635
Founded
2020 · 6 years
Last commercial register change
June 23, 2025
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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