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DirectoryConstruction & ArchitectureArchitecture FirmsBassersdorftumbai Architektur & Bauleitung AG
tumbai Architektur & Bauleitung AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Tumbai Architektur und Bauleitung AG is the provision of services in the field of architecture and construction management, particularly in the areas of consulting, planning, execution and cost control of construction projects. The company offers comprehensive services ranging from feasibility studies to project development and execution planning to construction management and handover.

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Products & services

Industry:Architecture Firms
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4.0/5

tumbai Architektur & Bauleitung AG

✓ Offered2
Architecture
Feasibility studies, preliminary clarifications, strategic planning for existing buildings, design, preliminary projects, building submissions and detailed execution planning for new builds and renovations.
Construction management
Scheduling, cost planning and cost control, tendering, on-site construction management as well as construction accounting and settlement for construction projects and individual SIA phases.
Trust & reputation

ranQ Trust Score of tumbai Architektur & Bauleitung AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

tumbai Architektur & Bauleitung AG scores 64.3 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.67.124%
  • 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%
tumbai Architektur & Bauleitung AG scores 81.1 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.89.612%
  • 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%
tumbai Architektur & Bauleitung 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%
tumbai Architektur & Bauleitung 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

tumbai Architektur & Bauleitung AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.4 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
4.4
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.47
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Sagiweg 6
8303 Bassersdorf

At a glance

Legal form
Corporation
UID
CHE-392.946.748
Founded
2015 · 11 years
Last commercial register change
March 16, 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.100.06%
  • 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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