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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryCrafts & TradesElectricianHörhausenIlg & Köstli AG
Ilg & Köstli AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ilg & Köstli AG is an electrical contractor providing electrical installation and planning services. Its activities include building automation, smart-home systems, photovoltaic solutions, electric-vehicle charging stations, network construction and lighting.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Electrician
✓ Offered9
Electricity
Electrical installations for buildings and facilities, power distribution, protection against high-voltage, as well as grid construction, metering and street lighting for local electricity utility operators.
Planning
Planning of electrical installations for construction projects, with a free initial consultation; mainly for single- and multi-family homes as well as smaller businesses in the Untersee and Rhein, Seerücken and Thurtal regions.
PV and battery storage
Photovoltaic systems and battery storage from planning through installation to maintenance; plus calculations of costs, profitability and potential savings with the PV calculator.
Smart home
Smart home solutions for controlling shading, ventilation, heating, lighting and power consumption; integrable with photovoltaic systems and EV charging stations, with systems such as Loxone, KNX and Wiser.
E-mobility
Advisory, planning and commissioning of charging stations for electric cars in private households, in commercial settings and in residential developments, including charging management and AC or DC solutions.
Building automation
Building informatics and networking with network cabling, telephone systems, WLAN, fibre-optic networks and DSL connections for municipalities, companies, schools and private households.
Communication
Communication installations and advisory for internet, TV, telephone, DSL, satellite, radio, infrared, multimedia, broadband as well as telephone systems for schools and SMEs.
Lighting
Lighting consultation and planning for the garden, home office, living room and Christmas lighting; including support with the selection of luminaires and lighting solutions.
24-hour emergency service
24/7 emergency service for electrical installations in the event of power failure, failing lighting, solar systems or heating problems outside business hours.
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4.3/5

Ilg & Köstli AG

Trust & reputation

ranQ Trust Score of Ilg & Köstli AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of November 2026

Ilg & Köstli AG scores 83.7 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.88.324%
  • 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.77.410%
  • 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%
Ilg & Köstli AG scores 80.4 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%
Ilg & Köstli AG scores 86.7 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).86.722%
Ilg & Köstli AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ilg & Köstli AG 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 20 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 20 reviews across all connected sources

Sources
GGoogle520
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Hauptstrasse 42
8507 Hörhausen
Opening hours
Mon
07:00 - 12:00, 13:15 - 17:00
Tue
07:00 - 12:00, 13:15 - 17:00
Wed
07:00 - 12:00, 13:15 - 17:00
Thu
07:00 - 12:00, 13:15 - 17:00
Fri
07:00 - 12:00, 13:15 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-192.599.226
Founded
2009 · 17 years
Last commercial register change
July 3, 2014
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • TGHomburg
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.
76.0
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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