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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialist foundation engineeringStachenHistorfen AG
Historfen AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Historfen AG advises on renovation solutions for historic windows. Its services include building surveys, condition assessments and evaluation of implementation options, as well as project coordination for window restoration, upgrading or replacement.

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Service area

Offering

Products & services

Industry:Specialist foundation engineering
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4.1/5

Historfen AG

✓ Offered7
Advice for windows in historic buildings
Advice with client, site management and heritage preservation; surveys, condition analysis, assessment of renovation and replacement options, cost estimates and neutral tender documents.
Window restoration
Restoration of historic windows while preserving original fabric; repairing or replacing defective wooden parts, re-gluing loose joints, and preserving fittings and historic glass.
Conversion of single-glazed windows to insulating glazing
Retrofitting insulating or vacuum glass into single-glazed windows worth preserving, including doublings, sealing elements and preservation of the interior view as far as possible.
Conversion of double-glazed windows to insulating glazing
Subsequent improvement of double-glazed windows by installing insulating glass or vacuum glass; variants with replacement of the inner, outer or both single panes.
Insulating-glass wooden windows as faithful replica
New insulating-glass wooden windows as a faithful replica with slim proportions, authentic profiling, historic fittings and possible integration of leaded glass.
Secondary windows, single or insulating glazing
Interior or exterior secondary windows as single or insulating glazing; protection for existing windows, improved thermal and acoustic insulation, replacement of defective secondary windows.
Restore and reuse leaded glass
Restoration of leaded glass and reuse in combination with insulating glass; cleaning, size adjustments, replacement of damaged panes and securing of the lead network.
Trust & reputation

ranQ Trust Score of Historfen AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of November 2026

Historfen AG scores 64.3 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.72.124%
  • 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.40.910%
  • 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.70.08%
Historfen 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%
Historfen AG 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%
Historfen AG scores 14.3 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 35.14.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Historfen AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.8 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle4.84
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Haselweg 6
9320 Stachen
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 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.707.158
Founded
2009 · 17 years
Last commercial register change
January 16, 2024
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • TGArbon
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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