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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceLausanneSiac - société immobilière, achats et constructions S.A.
Siac - société immobilière, achats et constructions S.A. Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Siac - société immobilière, achats et constructions S.A. provides cleaning services for businesses, commercial premises and property managers, including routine maintenance cleaning, end-of-lease and post-construction cleaning, floor and window care, and surface disinfection.

AI-generated
Offering

Products & services

Industry:Building Maintenance
✓ Offered3
Maintenance cleaning
Maintenance cleaning for offices, shops, schools, day nurseries and sports halls; dusting, floor care, window cleaning, disinfection of surfaces, cleaning of kitchens, bathrooms and WC, sorting waste.
End-of-lease and end-of-site cleaning
Cleaning of service apartments, end-of-lease cleanings, end-of-site cleanings, clearing out and cleaning after inheritances for owners and property management agencies.
Periodic cleaning of furnished apartments
Cleaning of furnished apartments on a daily, weekly or twice-monthly basis, with the provision of a welcome kit for new tenants.
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4.3/5

Siac - société immobilière, achats et constructions S.A.

Trust & reputation

ranQ Trust Score of Siac - société immobilière, achats et constructions S.A.: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Siac - société immobilière, achats et constructions S.A. scores 83.3 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.85.424%
  • 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.68.910%
  • 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.95.08%
Siac - société immobilière, achats et constructions S.A. 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%
Siac - société immobilière, achats et constructions S.A. 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%
Siac - société immobilière, achats et constructions S.A. scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Siac - société immobilière, achats et constructions S.A. reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 14 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 14 reviews across all connected sources

Sources
GGoogle514
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

Siac - société immobilière, achats et constructions S.A. in comparison

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Location

Place de la Palud 22
1003 Lausanne
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:30
Tue
08:00 - 12:00, 13:30 - 17:30
Wed
08:00 - 12:00, 13:30 - 17:30
Thu
08:00 - 12:00, 13:30 - 17:30
Fri
08:00 - 12:00, 13:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-102.081.659
Founded
1989 · 37 years
Last commercial register change
January 23, 2019
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.100.06%
  • 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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