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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryReal EstateReal Estate BrokerageAltendorfGrüninger Immo GmbH
Grüninger Immo GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Grüninger Immo GmbH is a real estate company focused on the sale and rental of residential and investment properties, as well as new-build projects, building land and holiday properties. It also provides property valuations and advisory services.

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Offering

Products & services

Industry:Real Estate Brokerage
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4.6/5

Grüninger Immo GmbH

9
Residential Property Sales
Sales of single-family homes and apartments with market valuation, marketing, photography, drone shots, 360° tours, and support through to completion.
Property Valuation
Market-based property valuation for single-family homes, condominiums, land, and multi-family houses, online or as an expert appraisal with report.
Residential Letting
Letting of single-family homes, apartments and first lettings with property analysis, rent valuation, documentation, viewings, credit checks and contract handling.
Buyer Advisory
Advice for property purchases with price review, condition assessment, location analysis, defect detection, yield and value-development checks, and negotiation support.
New-Build Project Marketing
Marketing of new-build and conversion projects with initial pricing, floor-plan and unit-mix analysis, sales documentation, websites and buyer support.
Investment Property Sales
Sale and valuation of multi-family houses, mixed-use properties and commercial buildings, plus sales documentation for investment properties.
Premium Property Sales
Discrete marketing of villas, lakeside homes and other exceptional properties in the premium segment with market-based pricing.
Land Sales
Sale of building land with market analysis, development and zoning studies, sales documentation, buyer search, negotiations and contract handling.
Holiday Property Sales
Sale of holiday properties in tourism and ski regions with valuation, targeted marketing, buyer database and regional partnerships.
Trust & reputation

ranQ Trust Score of Grüninger Immo GmbH: 4.6 out of 5.0

Trust Score4.6/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Grüninger Immo GmbH scores 96.8 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.96.124%
  • 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.100.010%
  • 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.95.08%
Grüninger Immo GmbH scores 83.0 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%
Grüninger Immo GmbH 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%
Grüninger Immo GmbH scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grüninger Immo GmbH reaches a ranQ Trust Score of 4.6 out of 5.0 — rated «Excellent». The rating draws, among other things, on 5.0 out of 5 stars from 80 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 80 reviews across all connected sources

Sources
GGoogle580
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Zürcherstrasse 44
8852 Altendorf
Opening hours
Mon
09:00 - 12:00, 13:30 - 17:00
Tue
09:00 - 12:00, 13:30 - 17:00
Wed
09:00 - 12:00, 13:30 - 17:00
Thu
09:00 - 12:00, 13:30 - 17:00
Fri
09:00 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-116.192.549
Founded
2010 · 16 years
Last commercial register change
April 8, 2021
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.
88.0
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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