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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryCrafts & TradesPlastererBaselGrassi & Co. AG
Grassi & Co. AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Operation of a plastering and painting business as well as ceiling installations and services in the field of dry construction. In connection with its main purpose, the company can conduct all commercial, industrial and financial transactions and participate in similar or related companies, as well as acquire or establish similar or related companies. It is also authorized to acquire and sell real estate.

Commercial register, canton of BS·As of December 28, 2020View on Zefix
Presence

Service area

Offering

Products & services

Industry:Plasterer
✓ Offered4
Plastering work
Interior and exterior plastering work, base coats and white coats, decorative finishing trowel techniques, render finishes, stucco work, building with clay and drywall construction.
Facade works
Facade insulation and facade rendering, compact facades, mineral insulation and renovation of facades with weather-resistant renders.
Ceiling work
Suspended ceilings, plaster ceilings, metal ceilings, mineral fibre ceilings and acoustic ceilings for sound, heat and visual protection as well as concealed installations.
Painting work
Interior and exterior coatings, facade, wall, ceiling, floor, door and window coatings, as well as decorative techniques and wallpapering work.
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4.4/5

Grassi & Co. AG

Trust & reputation

ranQ Trust Score of Grassi & Co. AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of November 2026

Grassi & Co. AG scores 81.9 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.81.724%
  • 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.77.410%
  • 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%
Grassi & Co. 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%
Grassi & Co. AG 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%
Grassi & Co. AG scores 17.1 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 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grassi & Co. AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 20 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.8
of 5

Aggregated from 20 reviews across all connected sources

Sources
GGoogle4.820
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Auf dem Wolf 23
4052 Basel
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.978.801
Founded
1986 · 40 years
Last commercial register change
December 28, 2020
Employees
11 to 20

Active in 1 of 26 cantons

  • BSBasel-City
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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