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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesMetal ConstructionDorénazJean Biollay Serrurerie Fine
Jean Biollay Serrurerie Fine Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Jean Biollay Serrurerie Fine is the manufacture and processing of metal products, particularly in the fields of locksmithing, polishing and patination. This includes the production of metal structures, the manufacture of doors, windows, staircases, fireplaces and other metalwork, as well as surface treatment by polishing and patination. The company also offers services in the field of interior design, such as the design of kitchens, villas and other rooms.

AI-generated
Offering

Products & services

Industry:Metal Construction
✓ Offered8
Fine locksmithing and metal fittings
Fine locksmithing elements for fit-out and artistic work, with custom-made parts made in steel, stainless steel, brass, aluminium and bronze.
Metal constructions
Metal constructions for a wide range of projects, including the fabrication of metal components and tailored solutions for demanding building sites.
Polishing and patinas
Finishing workshop for polishing and the execution of various patinas on different materials, with manual finishing work.
Custom metal installations
Metal installations for kitchens, interiors, glazing and various fittings, produced to measure according to the projects.
Glazing and wine cellar
Glazing for wine cellars and related works, presented as a specific category of projects.
Metal staircases
Fabrication and installation of metal staircases, illustrated by several reference projects.
Chimneys and metal linings
Works for chimneys and linings, with custom fabrication as part of specific projects.
Trade stands, museums and receptions
Manufacture of metal elements for trade stands, museums and receptions, according to projects presented as references.
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3.8/5

Jean Biollay Serrurerie Fine

Trust & reputation

ranQ Trust Score of Jean Biollay Serrurerie Fine: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 100% · As of October 2026

Jean Biollay Serrurerie Fine scores 62.0 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.70.824%
  • 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.27.910%
  • 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.78.08%
Jean Biollay Serrurerie Fine scores 65.7 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.70.212%
  • 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%
Jean Biollay Serrurerie Fine scores 86.7 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).86.722%
Jean Biollay Serrurerie Fine scores 20.0 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 35.20.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.20.04%
Qualifications+0.00

Jean Biollay Serrurerie Fine reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

December 29, 2022Media
Que sont-ils devenus? Jean Biollay, le patron heureux et ses deux apprentis
lenouvelliste.ch
March 16, 2022Media
Une offre d’emploi un peu spéciale à Dorénaz: «Je veux engager un apprenti qui a le smile»
lenouvelliste.ch

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Location

Rue des Bossons 30
1905 Dorénaz
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:30
Tue
07:00 - 12:00, 13:00 - 17:30
Wed
07:00 - 12:00, 13:00 - 17:30
Thu
07:00 - 12:00, 13:00 - 17:30
Fri
07:00 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-222.963.876
Founded
2020 · 6 years
Last commercial register change
March 6, 2020
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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