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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSchlierenJ.F. Jost Bau AG
J.F. Jost Bau AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

J.F. Jost Bau AG is a construction and real estate company that supports the full life cycle of residential and commercial properties, from development and realization to ongoing property management. Services include renovations and conversions, façade and concrete repairs, waterproofing/coatings, construction management, and rental and sales of properties.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered8
Property management and administration
Property management and administration of commercial and residential properties in the Greater Zurich area, from development through implementation to management.
Property sale and purchase
Advisory and service for the acquisition or sale of real estate of all types, including project development, implementation and support throughout the entire property life cycle.
Renting residential and commercial space
Residential and commercial spaces for rent, with advice in finding suitable rental properties and support when choosing the property.
Renovations and conversion work
Planning and carrying out major and minor renovations and conversions of residential and commercial properties, including preliminary assessments and on-time implementation.
Facade refurbishments
Refurbishment of building facades on properties and buildings, including repair of weather- and dirt-related damage to the facade surface.
Site supervision
Full handling of construction projects, coordination of implementation, advisory support for the client, and supervision regarding costs, schedules and execution.
Concrete repairs and restoration
Repair and restoration of damaged concrete structural elements, including exposing, cleaning and reprofiling defective areas and corroded reinforcement steel.
Waterproofing and coatings
Waterproofing of structures and exterior areas against moisture and water, using liquid plastic systems for balconies, roof terraces and walkways.
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4.2/5

J.F. Jost Bau AG

Trust & reputation

ranQ Trust Score of J.F. Jost Bau AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

J.F. Jost Bau AG scores 66.4 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.53.824%
  • 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.87.310%
  • 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.78.08%
J.F. Jost Bau AG scores 89.3 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.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.70.07%
J.F. Jost Bau AG 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%
J.F. Jost Bau AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

J.F. Jost Bau AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.0 out of 5 stars from 30 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 30 reviews across all connected sources

Sources
GGoogle430
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Steinwiesenstrasse 3
8952 Schlieren
Opening hours
Mon
07:30 - 12:00, 13:15 - 17:15
Tue
07:30 - 12:00, 13:15 - 17:15
Wed
07:30 - 12:00, 13:15 - 17:15
Thu
07:30 - 12:00, 13:15 - 17:15
Fri
07:30 - 12:00, 13:15 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.983.121
Founded
1975 · 51 years
Last commercial register change
December 4, 2025
Employees
11 to 20
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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