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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringSchwyzOtmar Spescha Ingenieurbüro AG
Otmar Spescha Ingenieurbüro AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Otmar Spescha Ingenieurbüro AG is an engineering firm for energy‑efficient building that provides energy consultations, energy concepts and planning for Minergie and passive‑house standards. Services include thermal building‑envelope optimization, building services planning (heating, ventilation, sanitary systems) and energetic quality controls such as blower‑door tests and measurement campaigns.

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Products & services

Industry:Technical Consulting & Engineering
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3.7/5

Otmar Spescha Ingenieurbüro AG

✓ Offered5
Energy consulting and energy concepts
Energy consulting and energy concepts for energy-efficient construction, focusing on renewable energy and ecological and economically justifiable use of energy.
Energy-efficient building design
Designs to optimise the thermal building envelope, for Minergie and Passive House concepts, as well as for heating, ventilation and sanitary engineering.
Minergie, Passive House and zero-energy standards
Support and optimisation of construction projects to achieve Minergie, Passive House or zero-energy standards.
Quality assurance and specialist site supervision
Specialist site supervision, airtightness testing with a blower door, energy quality checks, and short- and long-term measurements for temperature and humidity.
Passive House design
Design of Passive Houses as a step in structural building and heat supply, including Passive House concepts and reference to Passive House technology.
Trust & reputation

ranQ Trust Score of Otmar Spescha Ingenieurbüro AG: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 100% · As of October 2026

Otmar Spescha Ingenieurbüro AG scores 49.8 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.68.224%
  • 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.17.610%
  • 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%
Otmar Spescha Ingenieurbüro AG scores 84.6 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.97.712%
  • 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%
Otmar Spescha Ingenieurbüro AG scores 86.7 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).86.722%
Otmar Spescha Ingenieurbüro AG scores 1.2 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 35.2.34%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Otmar Spescha Ingenieurbüro AG reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

October 29, 2022Media
«Damals wurden wir noch belächelt»
bote.ch

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Location

Untere Mangelegg 3
6430 Schwyz

At a glance

Legal form
Corporation
UID
CHE-295.303.374
Founded
2012 · 14 years
Last commercial register change
May 22, 2012
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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