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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringCarouge GePerreten & Milleret SA
Perreten & Milleret SA Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Perreten & Milleret SA is an engineering firm specializing in the fields of construction, environment and geotechnics. The core activities include: Consulting and planning in the field of construction, including structures (concrete, steel, wood), buildings, civil engineering and railway engineering; Environmental consulting and planning; Geotechnical consulting and planning; Conseil Maître d'Ouvrage (CMO) - assuming tasks as a client representative; Specialized services such as earthquake-resistant buildings, concrete carbonation, material recycling, detection of hazardous materials, comprehensive audits and demolitions. The company offers its services throughout the entire project cycle, from the initial request to project realization.

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Offering

Products & services

Industry:Technical Consulting & EngineeringCivil Engineering Firms
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Perreten & Milleret SA

✓ Offered9
Civil engineering, structures and rail
Engineering services for works, buildings, civil engineering and rail: preliminary studies, predesigns, detailed designs, tenders, construction supervision and expert assessments.
Client Advisory (CMO)
Advice and support to the client: project options, project definition, financial management, project organisation, schedules and quality control.
Geotechnics
Geotechnical studies for earthworks, foundations, retaining structures, waterproofing, drainage and management of groundwater, taking into account ground constraints and hydrogeology.
Environmental services related to construction
Asbestos/PCB/HAP/lead surveys, planning and monitoring of remediation, expertise for soil contamination, waste management, SER, energy audits and life-cycle assessment.
Earthquake-resistant construction
Seismic checks of existing buildings, calculation and dimensioning of structures, measures to secure secondary elements and construction details according to SIA standards.
Detection of hazardous materials
Identification of asbestos, PCB, HAP and lead: diagnostics, sampling, analyses, diagnostic reports and planning of decontamination works before construction.
Global audits
Global assessments for energy and building physics: pollutants, rehabilitation of structures, static compliance, thermal quality of the building envelope and life-cycle assessment of materials.
Demolition
Services for demolition works: expertise on hazardous materials, permit documentation, feasibility of recovery, waste management plan, site supervision and final report.
Recycled materials in construction
Installation of recycled materials: stabilised excavated materials, recycled aggregates, recycled mineral materials for lean concrete, load-bearing concrete and bituminous mixes.
Trust & reputation

ranQ Trust Score of Perreten & Milleret 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.

Perreten & Milleret 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.
x
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%
Perreten & Milleret 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%
Perreten & Milleret 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%
Perreten & Milleret SA scores 40.0 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 35.40.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Perreten & Milleret 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

Rue Jacques-Grosselin 21
1227 Carouge Ge
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-101.382.578
Founded
1978 · 48 years
Last commercial register change
April 28, 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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