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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesElectrical Planning & InstallationRegensdorfa3 Haustech AG
a3 Haustech AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of a3 Haustech AG is the planning, installation, maintenance and repair of building technology systems, including: electrical systems, heating systems, ventilation systems, and sanitary systems (water, gas and compressed air installations, house drainage and main pipes). The company offers these services 24/7 and has an emergency service. It positions itself as a full-service provider that accompanies customers from planning to completion.

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Offering

Products & services

Industry:Electrical Planning & Installation
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a3 Haustech AG

Plumbing & Building Services
Specialized Construction Installations
✓ Offered7
Planning
Building services consulting, energy concepts, project and execution planning, CAD design, cost estimates and project management for sanitary, heating, ventilation and electrical.
Electrical installations
Electrical installations for power and low-current systems, planning, implementation and maintenance, small installations, service and repair work, as well as telephony, internet and cabling solutions.
Plumbing installations
Consulting and planning, project design and execution for new builds, conversions and renovations, water, gas and compressed-air installations, building drainage, main pipes as well as maintenance and repair service.
Heating installations
Project design and execution for new builds, conversions and renovations, heating refurbishments, air/water heat pumps and ground-source boreholes, gas, pellet and oil heating systems, solar installations, repair and maintenance work.
Ventilation systems
Consulting and needs assessment for ventilation and air-conditioning systems, controlled residential ventilation, exhaust systems for residential construction, as well as project design, installation, commissioning and maintenance.
Periodic electrical inspection
Periodic inspection of electrical installations at home to verify the systems at regular intervals; contact via the form provided.
24/7 Service
Emergency service outside office hours with an emergency number, callback by email within 24 hours and contact form; including deployment arrangements for evenings, nights, Sundays and public holidays.
Trust & reputation

ranQ Trust Score of a3 Haustech AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

a3 Haustech AG scores 76.9 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.75.324%
  • 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.79.710%
  • 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%
a3 Haustech AG scores 79.8 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.86.512%
  • 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%
a3 Haustech AG 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%
a3 Haustech AG scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

a3 Haustech AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 22 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
4.6
of 5

Aggregated from 22 reviews across all connected sources

Sources
GGoogle4.622
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Affolternstrasse 40
8105 Regensdorf
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-184.759.982
Founded
2016 · 10 years
Last commercial register change
December 4, 2025
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.
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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