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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionLausannezéro2 constructions SA
zéro2 constructions SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

zéro2 constructions SA is an architecture firm providing design and project-management services from concept development through construction completion. Services include feasibility studies, planning and permit submissions, construction supervision, renovations and interior design for residential, multi-unit and commercial projects.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered10
Architecture
Preliminary project, feasibility study, public submission, execution and site supervision for construction, renovation and fit-out projects.
Interior architecture
Interior design and layout of interior spaces, integrated into construction, conversion and renovation projects.
Transformations and rehabilitation
Renovation and conversion of existing buildings, with functional adaptation, preservation of character and integration of contemporary uses.
Villas and single-family homes
Tailor-made design of villas and single-family homes, adapted to the site, the surroundings, and the indoor and outdoor layout.
Multi-family housing
Design of multi-family housing buildings adapted to urban densification, residents’ comfort and constraints of the context.
Schools and UAPE facilities
Design of spaces for children, taking into account safety rules, ergonomics and local standards.
Public spaces
Design of public buildings and facilities that promote conviviality, well-being, social interaction and compliance with local standards.
Retail sales areas
Design of sales areas for brands, with attention to the customer experience, footfall flows, brand identity and budget constraints.
Administrative areas
Design of attractive and functional offices and administrative spaces, with optimisation of space, natural light and employees’ well-being.
Architecture competitions
Preparation of projects for architecture competitions, with creative proposals, compliance with instructions and consideration of environmental and regulatory aspects.
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4.1/5

zéro2 constructions SA

Trust & reputation

ranQ Trust Score of zéro2 constructions SA: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

zéro2 constructions SA scores 65.4 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.54.424%
  • 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.81.910%
  • 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.78.08%
zéro2 constructions 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%
zéro2 constructions SA 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%
zéro2 constructions SA scores 25.7 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 35.25.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

zéro2 constructions SA reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 24 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
4
of 5

Aggregated from 24 reviews across all connected sources

Sources
GGoogle424
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Avenue du Théâtre 14
1005 Lausanne
Opening hours
Mon
08:30 - 12:00, 13:30 - 17:30
Tue
08:30 - 12:00, 13:30 - 17:30
Wed
08:30 - 12:00, 13:30 - 17:30
Thu
08:30 - 12:00, 13:30 - 17:30
Fri
08:30 - 12:00, 13:30 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-112.536.638
Founded
2005 · 21 years
Last commercial register change
June 25, 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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