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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber Construction & CarpentryFlawilIsler Guido
Isler Guido Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Isler Guido is a carpentry and joinery business carrying out timber-construction and joinery work. Services include wooden facades (including traditional joinery facades), wooden and wood/metal windows and roof windows, interior fittings, parquet/laminate and terrace flooring, doors and stairs, as well as new-build, renovation and repair works with project planning and coordination of building trades.

AI-generated
Offering

Products & services

Industry:Timber Construction & Carpentry
✓ Offered9
Carpentry work / building construction
Carpentry work and building construction for new builds and conversions, renovations and repair work; also construction planning, site supervision and various construction work.
Joinery work
Joinery work, individual solutions to your requirements, expert advice, planning and execution; also furniture and adjustments for existing fixtures and fittings.
Wooden façades
Wooden façades and timber façades with fitted boards for new builds, conversions and repairs; adaptations to existing buildings are possible.
Windows and roof windows in wood and wood/metal
Windows and roof windows in wood as well as wood/metal; advice, planning and installation according to individual requirements.
Insulation
Insulation in connection with timber construction, conversions and interior fit-out work.
Interior fit-out / timber panelling
Interior fit-out and timber panelling work, including individual adjustments and installation for different interior design styles.
Parquet, laminate and terrace flooring
Installation of parquet, laminate and terrace flooring as part of interior fit-out and timber work.
Doors and staircases
Wooden doors and staircases, including advice, planning and installation to measure.
Conversions under a general contractor model
Conversions under a general contractor model, with organisation of all trades and coordination of the work.
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3.8/5

Isler Guido

Trust & reputation

ranQ Trust Score of Isler Guido: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Isler Guido scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
Isler Guido scores 78.5 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%
Isler Guido 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%
Isler Guido scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Isler Guido 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 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Burgau 3469
9230 Flawil
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, 13:00 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-105.561.878
Founded
2000 · 26 years
Last commercial register change
July 6, 2021
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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