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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureGeneral ContractorsGossau SgBlumer-Lehmann AG
Blumer-Lehmann AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Blumer-Lehmann AG is a wood-industry and timber-construction company providing consulting, architecture and planning services as well as production and on-site assembly. The company manufactures wood products such as sawn timber, facades, glued timber and timber modules and supplies silo and plant systems, conveying and control technology and residual-wood products (pellets, wood chips).

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Products & services

Industry:General Contractors
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4.5/5

Blumer-Lehmann AG

Timber Construction & Carpentry
✓ Offered8
General contractor services
General and joint general contractor services for timber construction projects, including client advice, project development, cost planning, execution planning, project management and handover.
Timber construction
Timber construction for buildings, including free-form structures, modular timber construction, prefabricated timber construction and load-bearing structures, wood-clay construction, conversions, extensions and additional storeys.
Timber construction planning and engineering
Timber construction planning and timber construction engineering, architecture and project development, parametric planning and scripting, digital fabrication and programming, BIM processes and winter service concepts.
Silo and facilities construction
Planning and construction of timber silos and facilities, including silo and facilities construction projects and related service and maintenance.
Laminated timber products
Glulam-standard, duo framing timber, CLT-curved, CLT-clever, CLT-solid and PLT-solid for structural beams and larger-dimension timber construction.
Solid wood products
Sawn timber, slats, wooden facades, planed products, terraces, custom products, timber grades and structured wood surfaces.
Residual timber products
Pellets made of Swiss wood, wood chips, sawdust, bark and bark mulch, and litter for small animals.
Technology
Brine technology, conveyor technology, control technology, measurement and weighing technology for silo and timber-based systems.
Trust & reputation

ranQ Trust Score of Blumer-Lehmann AG: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 92% · As of October 2026

Blumer-Lehmann AG scores 78.6 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.80.724%
  • 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.73.510%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Blumer-Lehmann AG scores 95.8 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.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.96.07%
Blumer-Lehmann AG 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%
Blumer-Lehmann AG scores 75.0 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 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.50.04%
Qualifications+0.00

Blumer-Lehmann AG reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.8 out of 5 stars from 17 customer reviews. The data basis is 92%, 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
4.8
of 5

Aggregated from 17 reviews across all connected sources

Sources
GGoogle4.817
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

June 2, 2026Media
Neuer Hauptsitz von Blumer Lehmann Griesser AG
swiss-architects.com
May 26, 2026Media
Stammhaus Blumer Lehmann K&L Architekten
swiss-architects.com
March 26, 2026Media
Blumer Lehmann holt «Award Bildung Holz»
leaderdigital.ch
March 26, 2026Media
AWARD BILDUNG HOLZ für die Blumer Lehmann Academy
gossau24.ch
January 29, 2026Media
Nach der erfolgreichen Integration: Günter Ebner verabschiedet sich von Blumer Lehmann
badenertagblatt.ch
January 27, 2026Media
Meier wird Blumer-Lehmann-Standortleiter Neuenhof
leaderdigital.ch
September 8, 2025Media
150 Jahre Blumer Lehmann: Gossauer Holzbaufirma lädt zum Fest
tagblatt.ch
August 18, 2025Media
Frutiger übernimmt Holzbaufirma Blumer Lehmann
baublatt.ch

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Location

Hier entsteht die Karte
Erlenhof
9200 Gossau Sg
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:00
Tue
07:30 - 12:00, 13:15 - 17:00
Wed
07:30 - 12:00, 13:15 - 17:00
Thu
07:30 - 12:00, 13:15 - 17:00
Fri
07:30 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.596.005
Founded
1999 · 27 years
Last commercial register change
June 15, 2026
Employees
101 to 500
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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