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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsCarouge GeBLSA architectes SA
BLSA architectes SA Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of BLSA (BLS Architects) is the provision of architectural and planning services for construction projects.

AI-generated
Offering

Products & services

Industry:Architecture Firms
✓ Offered8
Architecture
Architecture for residential buildings, cultural buildings, schools, medical centres, conversions and competitions; renovation, extension, new construction and external works projects.
Conversion and renovation
Conversion and renovation of existing buildings, in particular villas, farmhouses and other properties; extensions, alterations and reprogramming of uses.
Housing design
Design of housing, residential buildings, detached villas and semi-detached villas; projects for private and collective housing.
School and education architecture
Architecture for primary schools, middle schools, orientation cycles and school facilities; teaching building projects and related fit-outs.
Cultural architecture
Architecture for museums, libraries, theatres and other cultural facilities; exhibition projects, halls and cultural spaces.
Medical and healthcare architecture
Architecture for medical centres, physiotherapy practices, dialysis centres and other healthcare premises; fit-out projects for care and consultation.
Industrial and commercial architecture
Architecture for industrial buildings, retail and business premises; projects for mixed-use buildings and professional sites.
Architecture competitions
Participation in architecture competitions for footbridges, schools, housing, public facilities and other programmes.
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4.1/5

BLSA architectes SA

Trust & reputation

ranQ Trust Score of BLSA architectes SA: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

BLSA architectes SA has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
BLSA architectes SA 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%
BLSA architectes SA scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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).83.322%
BLSA architectes SA scores 62.9 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 35.62.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

BLSA architectes SA reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Clos de la Fonderie 3
1227 Carouge Ge

At a glance

Legal form
Corporation
UID
CHE-109.506.571
Founded
2002 · 24 years
Last commercial register change
January 13, 2026
Employees
11 to 20
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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