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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesMetal ConstructionLohn-AmmannseggFortmann AG
Fortmann AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Fortmann AG is the planning, implementation and renovation of conservatories, living space extensions, patio roofs, minimal windows and shading systems. The company also offers services such as maintenance, service, project management and construction coordination.

AI-generated
Offering

Products & services

Industry:Metal Construction
✓ Offered7
Conservatories
Conservatories in heated, partially insulated or summer garden versions, for additional light and sunlight, extending the living and garden season.
Glazing
Glazing for conservatories, balconies, folding walls, sliding partitions and special glazing to extend living space and provide protection from wind and weather.
Shading systems
Shading systems such as Sonnenstoren, Wintergartenbeschattung, Sonnen-Regenpergola, Lamellendach and Pergolino for shade, as well as protection from sun and rain.
Terrace covers
Terrace covers as all-weather protection for seating areas, garden parties and terraces in sun, rain and snow.
Maintenance & service
Maintenance, service and care for existing properties so that products and installations retain their function and value for years.
Project management
Project management for conservatories, glazing, glazed balconies and the replacement of Hebeschiebetüren (lift-and-slide doors), including expert support throughout the project.
Construction coordination
Construction coordination for conservatories and glazing, so that everything around implementation is coordinated and supported.
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4.3/5

Fortmann AG

Trust & reputation

ranQ Trust Score of Fortmann AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Fortmann AG scores 74.1 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.75.024%
  • 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.61.010%
  • 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%
Fortmann 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%
Fortmann 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%
Fortmann AG scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fortmann AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 10 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 10 reviews across all connected sources

Sources
GGoogle4.710
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Wassergasse 14
4573 Lohn-Ammannsegg
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 16:30
Sat
24h
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.731.301
Founded
2001 · 25 years
Last commercial register change
June 27, 2025
Employees
11 to 20
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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