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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceWinterthurZemp Umbau
Zemp Umbau Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Zemp Umbau is the provision of skilled craft services for private households and properties, particularly in the areas of: construction and renovation, civil engineering, landscaping, property maintenance, and minor repairs. The company thus offers a wide range of skilled craft services to meet the needs of its customers.

AI-generated
Offering

Products & services

Industry:Building Maintenance
✓ Offered4
Remodelling and Renovation Work
Remodelling, minor repairs and renovation work around the home, including work on buildings and properties indoors and outdoors.
Garden Maintenance and Landscaping
Garden work and help in the garden, including maintenance and surrounding-area work around the house and property.
Building Maintenance
Building maintenance for properties, with care and upkeep around the building and outdoor areas.
Core Drilling and Tiling Work
Core drilling and laying ceramic tiles, for example at the house entrance or forecourt.
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3.7/5

Zemp Umbau

Trust & reputation

ranQ Trust Score of Zemp Umbau: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 54% · As of October 2026

Zemp Umbau 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%
Zemp Umbau scores 52.6 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.39.612%
  • 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%
Zemp Umbau 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%
Zemp Umbau scores 4.0 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 35.4.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zemp Umbau reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». 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

Bettenstrasse 128
8400 Winterthur
Opening hours
Mon
07:30 - 18:00
Tue
07:30 - 18:00
Wed
07:30 - 18:00
Thu
07:30 - 18:00
Fri
07:30 - 18:00
Sat
08:00 - 16:00
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-304.740.853
Founded
2024 · 2 years
Last commercial register change
March 26, 2024
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.
67.0
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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