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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsGränichenBionova, Bohren & Greminger
Bionova, Bohren & Greminger Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of bionova is the environmentally friendly and sustainable planning and realization of construction projects, including architecture, interior design, color design, energy consulting and building biology. The company offers comprehensive services for new buildings and renovations, with the goal of creating healthy and natural environments for its customers.

AI-generated
Offering

Products & services

Industry:Architecture Firms
✓ Offered8
Architecture
Concepts for new builds and renovations, simple visualisations, variant checks, building-law clarifications, detailed cost estimates, scheduling, and colour and material concepts.
Colour and material concepts
Colour and material concepts using natural pigments, selecting suitable materials per project, developing coherent colour palettes, and producing individual sample boards.
Craftsmanship
Artisan execution using a range of techniques, experimenting with new materials, and implementing clients’ wishes in design concepts.
Tadelakt
Tadelakt surfaces with Moroccan lime plaster, elaborate application, unique tactile feel and an elegant appearance.
Clay plasters and clay paints
Clay plasters and clay paints for a pleasant indoor climate, a wide range of looks, and, on request, individual sample boards.
Decorative techniques
Decorative wall techniques with self-developed processes, including linen wall cladding and the optical blending of clay surfaces in different colours.
Energy consulting
Advice on sustainable insulation, reducing energy use, and the energy-efficient refurbishment of buildings.
Building biology
Advice on building biology and building ecology, focusing on naturally built environments, indoor climate, and low-emission building materials.
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3.8/5

Bionova, Bohren & Greminger

Trust & reputation

ranQ Trust Score of Bionova, Bohren & Greminger: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Bionova, Bohren & Greminger scores 49.0 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.62.524%
  • 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.27.910%
  • 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%
Bionova, Bohren & Greminger scores 81.0 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%
Bionova, Bohren & Greminger 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%
Bionova, Bohren & Greminger 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

Bionova, Bohren & Greminger reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 2 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
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle42
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Eizopfstrasse 1
5722 Gränichen

At a glance

Legal form
General Partnership
UID
CHE-107.480.386
Founded
1993 · 33 years
Last commercial register change
March 5, 2026
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.
79.0
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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