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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesMasonry WorkWinterthurZUKA UMBAU & RENOVATION GmbH
ZUKA UMBAU & RENOVATION GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of ZUKA Kundenmaurer GmbH is the execution of renovation and conversion work, particularly in the area of single-family homes and multi-family homes, with a focus on masonry work, bathroom and kitchen renovations, concrete repairs and other customer-specific masonry work, often under the condition that the work is carried out dust-free and in an inhabited state.

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Products & services

Industry:Masonry Work
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4.3/5

ZUKA UMBAU & RENOVATION GmbH

✓ Offered6
Conversion and Renovation
Conversion, renovation and masonry work for single-family homes, multi-family houses and commercial buildings; including site set-up, demolition, chipping and plastering work, core drilling and interior fit-out.
Bathroom Renovation
Bathroom renovation with demolition and chipping work, disposal, uncovering and re-masonry of pipes, as well as pre-walls and underpinning of bathtubs or showers.
Kitchen Renovation
Kitchen renovation with dismantling and disposal of kitchen fittings, chipping off wall and floor tiles, uncovering and re-masonry of pipes.
Concrete Restoration
Concrete restoration of staircases, balconies, supporting columns, buildings and infrastructure structures; including condition assessment, surface reinstatement, partial or full restoration and concrete cosmetic work.
Wall Opening
Wall openings and cut-throughs with wall cutting, chipping work, propping of the ceiling, installation of steel beams, as well as demolition of non-load-bearing walls and disposal of rubble.
Renovation in Occupied Condition
Renovation of occupied rooms with low-dust protective measures, air cleaning, underpressure/overpressure systems and reduced dust exposure in affected and adjacent rooms.
Trust & reputation

ranQ Trust Score of ZUKA UMBAU & RENOVATION GmbH: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

ZUKA UMBAU & RENOVATION GmbH scores 81.2 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.84.824%
  • 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.67.110%
  • 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.88.08%
ZUKA UMBAU & RENOVATION GmbH scores 83.0 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.55.07%
ZUKA UMBAU & RENOVATION GmbH 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%
ZUKA UMBAU & RENOVATION GmbH scores 6.6 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 35.6.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ZUKA UMBAU & RENOVATION GmbH reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 13 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 13 reviews across all connected sources

Sources
GGoogle513
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Schwerzenbachstrasse 8
8405 Winterthur
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-116.133.297
Founded
2010 · 16 years
Last commercial register change
February 10, 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.
88.0
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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