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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesJoineryUnterterzenFenster Graf & Sohn AG
Fenster Graf & Sohn AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Fenster Graf & Sohn AG sells and advises on windows, front doors, lift-and-slide doors, patio doors, sun protection and insect screens. The company also offers services such as window, door and gate service, key service, and a showroom for product consultation.

AI-generated
Offering

Products & services

Industry:Joinery
✓ Offered8
Windows
Windows made to measure in various sizes, designs and finishes; PVC windows, PVC-alu windows, wood-alu windows, composite windows, as well as window accessories and large-format glazing.
Front doors
Front doors made to measure in aluminium and wood-aluminium; various models, side panels, fanlights, handles, colours, as well as burglary protection up to RC2 and door design.
Lift-and-slide doors
Lift-and-slide doors for large openings, matching windows and front doors; listed as a separate product in the main menu.
Window service
Repair, replacement and installation of windows, fittings and glass; brand-independent for all manufacturers, including insulated and safety glass as well as special solutions.
Door service
Service for doors with repair, replacement and installation; listed as a separate service area in the menu.
Gate service
Gate service as a separate service category; listed in the menu alongside window and door service.
Insect protection
Insect protection as a product for windows and doors; listed in the product section and among other products.
Sun protection
Sun protection listed as a complementary product in the Internorm product area.
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4.2/5

Fenster Graf & Sohn AG

Trust & reputation

ranQ Trust Score of Fenster Graf & Sohn AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Fenster Graf & Sohn AG scores 74.5 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.78.124%
  • 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.49.510%
  • 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.95.08%
Fenster Graf & Sohn 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%
Fenster Graf & Sohn 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%
Fenster Graf & Sohn AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fenster Graf & Sohn AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 6 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 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Fischenzenstrasse 4
8882 Unterterzen
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.939.421
Founded
2009 · 17 years
Last commercial register change
July 3, 2009
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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