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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryReal EstateProperty managementHerisauKeller + Marquart Immo AG
Keller + Marquart Immo AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Keller + Marquart Immo AG is a company that designs, manufactures in its own production and installs windows and entrance doors. Its services include consultation, repairs and window maintenance, and it offers sun and insect protection products and related accessories.

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Presence

Service area

Offering

Products & services

Industry:Property management
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4.4/5

Keller + Marquart Immo AG

✓ Offered6
Consulting
Advice for window and exterior door solutions, individual planning and personal support before installation.
Installation
Installation of windows and exterior doors, careful workmanship and fitting of the individually planned solutions.
Repairs
Repairs to windows and exterior doors, restoration of existing systems and professional remedy of damage.
Window service
Window service for maintenance, follow-up checks and care of windows in existing buildings.
Emergency lock opening & key service
Emergency lock openings and key service for doors and access points, including quick help when properties are locked.
Indoor climate
Indoor climate solutions in connection with windows and doors, to support comfort and living quality.
Trust & reputation

ranQ Trust Score of Keller + Marquart Immo AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of November 2026

Keller + Marquart Immo AG scores 83.7 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.79.624%
  • 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.84.710%
  • 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%
Keller + Marquart Immo 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%
Keller + Marquart Immo 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%
Keller + Marquart Immo AG scores 12.6 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 35.12.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Keller + Marquart Immo AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 27 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
4.7
of 5

Aggregated from 27 reviews across all connected sources

Sources
GGoogle4.727
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Alpsteinstrasse 16a
9100 Herisau
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.875.810
Founded
1976 · 50 years
Last commercial register change
December 27, 2023
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ARHerisau
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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