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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesElectrical Planning & InstallationObfeldenBlum Elco
Blum Elco Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Blum Elco is the provision of services in the field of electrical installations, including telephony, network, household and security, as well as the planning and execution of new construction, renovation and refurbishment projects.

AI-generated
Offering

Products & services

Industry:Electrical Planning & Installation
✓ Offered9
Electrical installations
Electrical installations for new builds, conversions and renovations; consulting, installation, commissioning as well as maintenance and repairs of electrical systems.
Electrical planning
Electrical planning for construction projects; creation of plans, diagrams and project workflows for new builds, conversions and renovations, on request with coordination of the project partners.
Photovoltaic systems
Design and installation of photovoltaic systems for homes and commercial properties; from roof analysis through mounting to commissioning.
EV charging stations
Installation of EV charging stations in private households, multi-family homes and commercial properties, including power connection and load management.
Lighting concepts
Lighting design for indoor and outdoor spaces; LED solutions, smart lighting control and accent lighting for home or business.
Security solutions
Installation of alarm systems, video surveillance and access control systems for private and commercial properties.
Network infrastructure
Structured cabling as well as setup of switches and routers for reliable networks in homes or offices.
Household appliances
Sales, connection, installation and repair of household appliances such as cookers, dishwashers and washing machines.
Service and repair
Quick help with faults, repairs of devices and systems, as well as regular maintenance so that installations work again.
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3.9/5

Blum Elco

Trust & reputation

ranQ Trust Score of Blum Elco: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Blum Elco scores 56.8 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.73.124%
  • 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.35.310%
  • 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.35.08%
Blum Elco scores 78.5 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%
Blum Elco scores 83.3 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).83.322%
Blum Elco scores 11.7 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 35.11.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Blum Elco reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Kalchtarenstrasse 15
8912 Obfelden
Opening hours
Mon
07:15 - 17:00
Tue
07:15 - 17:00
Wed
07:15 - 17:00
Thu
07:15 - 17:00
Fri
07:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-110.258.552
Founded
2003 · 23 years
Last commercial register change
November 3, 2015
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.
67.0
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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