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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureTimber constructionLauperswilGrunder Holzbau
Grunder Holzbau Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Grunder Holzbau is a carpentry and timber construction business that plans and carries out wood-building projects. Its services include conversions, window and door work, interior finishing, wooden staircases and thermal insulation.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Timber construction
✓ Offered6
Carpentry work
Planning, procurement of materials and implementation of small to medium-sized timber construction projects.
Renovations
Conversions of farmhouses, barns and other buildings, tailored to the respective needs.
Window renovations
Planning and installation of windows as complete solutions for window renovation.
Interior fit-out
Interior fit-out with timber, often in collaboration with regional partners.
Staircase construction
Timber staircases for residential buildings, barns, warehouses and industrial facilities.
Isofloc thermal insulation
Thermal insulation with Isofloc to reduce energy costs.
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3.7/5

Grunder Holzbau

Trust & reputation

ranQ Trust Score of Grunder Holzbau: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of November 2026

Grunder Holzbau 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%
Grunder Holzbau scores 75.3 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.92.512%
  • 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%
Grunder Holzbau 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%
Grunder Holzbau scores 1.1 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 35.1.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grunder Holzbau 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. 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Wittenbach 597
3438 Lauperswil

At a glance

Legal form
Sole proprietorship
UID
CHE-115.578.308
Founded
2014 · 12 years
Last commercial register change
March 13, 2014
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BELauperswil
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.
67.0
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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