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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryReal EstateReal estate agentDiepoldsauSI Sieber Immobilien AG
SI Sieber Immobilien AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

SI Sieber Immobilien AG plans and develops residential projects and rents out and manages its own residential and commercial properties. Its activities also include architectural services and project delivery from planning through property management.

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Service area

Offering

Products & services

Industry:Real estate agent
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SI Sieber Immobilien AG

Real estate brokerage
Letting of residential and commercial spaces, current rental properties, advice by phone or email, and brokerage of available apartments via the partner website Newhome.
Property management
Management of our own properties, ongoing renovations and personal service for residential and commercial spaces.
Architecture
Planning of timeless, well-considered living spaces, design of residential properties and architectural support for projects.
Construction of new buildings
Construction of new buildings from the first ground-breaking ceremony to handing over the keys, focusing on residential properties, commercial spaces and sustainable quality.
Trust & reputation

ranQ Trust Score of SI Sieber Immobilien AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of November 2026

SI Sieber Immobilien AG scores 51.9 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.37.724%
  • 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.65.210%
  • 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.78.08%
SI Sieber Immobilien 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%
SI Sieber Immobilien 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%
SI Sieber Immobilien AG scores 51.4 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 35.51.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

SI Sieber Immobilien AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 3.3 out of 5 stars from 12 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
3.3
of 5

Aggregated from 12 reviews across all connected sources

Sources
GGoogle3.312
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Werkstrasse 31
9444 Diepoldsau

At a glance

Legal form
Corporation
UID
CHE-366.920.565
Founded
2011 · 15 years
Last commercial register change
June 22, 2016
Employees
11 to 20

Active in 1 of 26 cantons

  • SGSt. Gallen
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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