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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsZurichBaumgartner + Partner AG
Baumgartner + Partner AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Baumgartner + Partner AG is the provision of architectural services, particularly in the field of sustainable architecture, conversions and renovations of existing buildings. The company supports customers in evaluating and developing ideas for their properties, checks potential and creates feasibility studies.

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Offering

Products & services

Industry:Architecture Firms
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4.1/5

Baumgartner + Partner AG

✓ Offered
6
Interventions in Existing Buildings
Maintenance, adaptation and further development of existing buildings through renewal, refurbishment, extension and addition; with careful design work, 3D planning and precise condition assessment.
Renovation and Refurbishment of Multi-Family Houses
Renovation, refurbishment and strengthening of existing multi-family houses; including careful floor-plan adjustments, riser refurbishments, roof fit-out and clarification of fire protection, legacy contamination and earthquake safety.
Sustainable Architecture
Sustainable design and renovation using resource-conserving, health-safe building materials; energy refurbishment, fossil-free primary energy, GEAK Plus, Minergie and ecobau-oriented product selection.
Feasibility Studies
Feasibility studies for conversions, extensions, above-building construction or replacement new-build; comparison of costs, potentials, CO₂ balance and economic feasibility for existing properties.
Site Management and Project Coordination
Support of projects from the first study through to completion; coordination of specialist planners and specialists, management of the construction site, as well as construction journal and construction accounting.
Client Representation
Representation of the client in projects including the construction project, execution planning and coordination of implementation; support in planning, tendering and project control.
Trust & reputation

ranQ Trust Score of Baumgartner + Partner AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Baumgartner + Partner AG scores 71.3 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.79.424%
  • 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.52.910%
  • 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.70.08%
Baumgartner + Partner AG scores 79.8 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.86.512%
  • 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%
Baumgartner + Partner AG scores 85.0 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).85.022%
Baumgartner + Partner AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Baumgartner + Partner AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 7 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 7 reviews across all connected sources

Sources
GGoogle57
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Bühlstrasse 45c
8055 Zurich
Opening hours
Mon
08:00 - 17:30
Tue
08:00 - 17:30
Wed
08:00 - 17:30
Thu
08:00 - 17:30
Fri
08:00 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-390.063.648
Founded
2016 · 10 years
Last commercial register change
July 17, 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.
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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