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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceWallisellenBlumbau AG
Blumbau AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Blumbau AG is the provision of services in the construction sector, particularly in the areas of: construction consulting, planning and construction management, plastering, painting, masonry, facade renovation, tile laying, asbestos and hazardous substance removal, fire protection and quality assurance (QSS). The company thus offers a comprehensive range of construction-related services, from planning and consulting to the execution of construction projects.

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Products & services

Industry:Building Maintenance
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Blumbau AG

✓ Offered6
Advisory & Planning
Advisory on feasibility, costs and dates before the renovation; planning of implementation and coordination of the work until a clean handover.
Builder's Works
Builder's works for conversions, wall openings and home renovations; structurally precise work with careful handling of the existing building fabric.
Plastering and Drywall
Plastering work with new rendering, partition walls and ceiling works; drywall construction for flexible modification of floor plans and clean interior finishing.
Tiling Works
Laying ceramic, natural stone and modern floor coverings in bathrooms, kitchens and outdoor areas; including advice on waterproofing, slip resistance, easy maintenance and frost resistance.
Painting Works
New coats, renovations and colour designs for residential and commercial buildings; coordinated execution as part of the overall project.
Facade Renovation
Repairs of cracks, energy insulation, mesh reinforcement and weatherproof exterior render; for maintaining value and reducing heating costs.
Trust & reputation

ranQ Trust Score of Blumbau AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Blumbau 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.
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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%
Blumbau AG scores 89.3 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.100.012%
  • 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%
Blumbau 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%
Blumbau AG scores 65.7 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.65.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Blumbau 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

Gewerbehallenstrasse 1
8304 Wallisellen

At a glance

Legal form
Corporation
UID
CHE-114.368.659
Founded
2008 · 18 years
Last commercial register change
June 9, 2022
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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