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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringOberaachST Gebäudetechnikplaner GmbH
ST Gebäudetechnikplaner GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

ST Gebäudetechnikplaner GmbH is a building services engineering firm that provides heating design, sanitary design, ventilation planning, energy performance reports, site supervision, coordination and consulting. The company prepares SIA‑compliant documentation and collaborates with architects, contractors and owners.

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Products & services

Industry:Technical Consulting & Engineering
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ST Gebäudetechnikplaner GmbH

✓ Offered7
Heating system design
Heating systems for single-family houses, multi-family houses as well as commercial and mixed-use buildings; heat pumps, underfloor heating, district heating connections and energy-efficient concepts.
Sanitary system design
Sanitary systems and bathroom concepts for single-family houses, multi-family houses as well as commercial and mixed-use buildings; hygienic, safe and long-lasting installations.
Ventilation system design
Comfort ventilation systems for residential houses, residential developments, public buildings, office and commercial areas; systems with heat recovery and energy savings.
Energy performance assessments
SIA 380/1 energy performance assessments, Minergie attestations and certifications, standard heating load calculations as well as overall energy studies and subsidy applications.
Coordination
Technical and spatial coordination of heating, ventilation, sanitary systems and structural elements; planning of shafts, technical rooms and routing of pipework.
Site supervision
Coordination of all trades on site, quality assurance for building-services installations, monitoring of schedule and budget, problem solving on site.
Consulting
Early project analysis, identification of risks, independent recommendations on systems and budgets as well as advice on sustainable and efficient building solutions.
Trust & reputation

ranQ Trust Score of ST Gebäudetechnikplaner GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

ST Gebäudetechnikplaner GmbH 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.
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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%
ST Gebäudetechnikplaner GmbH scores 78.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.89.612%
  • 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%
ST Gebäudetechnikplaner GmbH scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
ST Gebäudetechnikplaner GmbH scores 14.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.14.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ST Gebäudetechnikplaner GmbH 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.

Knowledge

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Location

Mostereistrasse 1
8587 Oberaach

At a glance

Legal form
Limited Liability Company
UID
CHE-364.051.438
Founded
2015 · 11 years
Last commercial register change
December 27, 2021
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.
88.0
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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