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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPainting & PlasteringNenzlingenGebr. Oser AG
Gebr. Oser AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Gebrüder Oser AG is the provision of plastering services, rendering services, drywall construction, facade and renovation services, including project planning, technical planning, scheduling, estimating and sampling. The company also offers specialized services such as crack repair, stucco work, decorative plastering, fire protection, acoustic cladding, soundproofing, protection against water damage, building protection, mold remediation, basement waterproofing, basement renovation and basement ceiling insulation.

AI-generated
Offering

Products & services

Industry:Painting & Plastering
✓ Offered7
Plastering work
Plastering work of all kinds, rendering from clay to smooth plaster, stucco work, decorative renders and crack repair for indoor and outdoor areas.
Drywall construction
Drywall walls and ceilings, partition walls, linings, drywall systems as well as acoustic linings, sound insulation and fire protection measures.
Facade restoration
Facade restoration and facade renovation, thermal insulation, crack repair, rendering work and facade construction for new builds and refurbishment.
Building protection
Water damage remediation and drying, mould remediation, basement waterproofing, basement restoration, basement ceiling insulation and other preventive protective work.
Conversion work
Conversion, refurbishment and renovation, interior conversions, renovation of older buildings as well as redesigns of indoor spaces with masonry and plastering work.
Project planning
Technical planning, scheduling, tendering and material selection to coordinate plastering, facade, conversion and refurbishment projects.
Client masonry work
Redesigning walls and ceilings, wall demolition and new walls, patching, openings and repairs to masonry, plaster and facade.
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4.4/5

Gebr. Oser AG

Trust & reputation

ranQ Trust Score of Gebr. Oser AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

Gebr. Oser AG scores 85.3 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.80.924%
  • 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.93.810%
  • 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%
Gebr. Oser AG scores 85.5 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%
Gebr. Oser AG scores 83.3 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).83.322%
Gebr. Oser AG scores 45.7 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 35.45.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gebr. Oser AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 39 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
4.7
of 5

Aggregated from 39 reviews across all connected sources

Sources
GGoogle4.739
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Baselstrasse 6
4224 Nenzlingen
Opening hours
Mon
07:00 - 17:30
Tue
07:00 - 17:30
Wed
07:00 - 17:30
Thu
07:00 - 17:30
Fri
07:00 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.960.066
Founded
1982 · 44 years
Last commercial register change
November 27, 2025
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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