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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSeengenGrundmann Bau AG, Zweigniederlassung Seengen
Grundmann Bau AG, Zweigniederlassung Seengen Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Grundmann Bau AG, Zweigniederlassung Seengen is a construction branch providing services in structural building, civil engineering, renovations, hazardous-material remediation and logistics, and it also develops, sells and rents real estate. The branch acts as a total or general contractor and holds ISO 9001 and ISO 14001 certifications.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered9
Building construction
Building construction for residential, commercial and industrial buildings as well as public buildings; single-family houses, semi-detached and terraced houses, multi-family houses, large-scale developments, office buildings, production facilities, industrial halls and conversions.
Civil engineering
Civil engineering including utility lines, sewer systems, excavation pits, edge finishes and forecourts; plus paving works, service connections and concrete works.
Conversions and renovations
Conversions, extensions and renovations; repairs, refurbishments, maintenance, masonry service, energy-efficiency upgrades as well as plastering and drywall work.
Hazardous substance remediation
Remediation of hazardous substances such as asbestos, PCB, PCP and PAHs; support from analysis through remediation to a contamination-free building.
Logistics
Transport services with flexible 5-axle trucks; crane work, skip-bin service, silo deliveries and tarp-sided truck transports.
Real estate development
Development of real estate projects based on needs analyses and strategic development of plots and properties for residential and working spaces.
Real estate realization
Realization of owner-occupied and rental apartments, single-family houses and commercial buildings as a total or general contractor, with construction management, cost certainty and schedule reliability.
Real estate sales
Sale of owner-occupied apartments, single-family houses, office and commercial spaces as well as larger properties from our own development and realization.
Real estate rentals
Rental of apartments for rent as well as commercial and office spaces.
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4.1/5

Grundmann Bau AG, Zweigniederlassung Seengen

Trust & reputation

ranQ Trust Score of Grundmann Bau AG, Zweigniederlassung Seengen: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Grundmann Bau AG, Zweigniederlassung Seengen 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%
Grundmann Bau AG, Zweigniederlassung Seengen scores 87.1 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.82.07%
Grundmann Bau AG, Zweigniederlassung Seengen scores 85.0 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).85.022%
Grundmann Bau AG, Zweigniederlassung Seengen scores 82.9 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 35.82.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grundmann Bau AG, Zweigniederlassung Seengen 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.

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Location

Poststrasse 10
5707 Seengen
Opening hours
Mon
08:00 - 12:00, 13:30 - 18:00
Tue
08:00 - 12:00, 13:30 - 18:00
Wed
08:00 - 12:00, 13:30 - 18:00
Thu
08:00 - 12:00, 13:30 - 18:00
Fri
08:00 - 12:00, 13:30 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-411.882.588
Founded
2005 · 21 years
Last commercial register change
June 7, 2012
Employees
21 to 50
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.76.06%
  • 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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