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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsBaselBaufamilie A. Kost
Baufamilie A. Kost Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Baufamilie A. Kost is the individual planning, accompaniment and realization of renovation processes for existing buildings, including property consulting, building checks, renovation planning, cost estimation and the organization of the construction site with regional specialized craftsmen.

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Products & services

Industry:Architecture FirmsConstruction & Project Management
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Baufamilie A. Kost

✓ Offered6
Real estate advisory
Advice for owner groups on the future direction of the property, clarifying maintenance, annual budget, mortgage obligations and possible renovation options.
Building assessment
On-site assessment to evaluate sensible renovation measures, costs, cost-effectiveness and the feasibility of individual wishes, including permit clarification.
Renovation planning
Planning for home renovations, taking use, material selection, energy concepts, building automation and individual renovation concepts into account.
Cost estimate
Cost calculation for renovation projects based on quotations, cost breakdown plan, material and product recommendations, and the current condition of the building.
Execution coordination
Coordination of regional specialist trade contractors as well as planning, cost calculation, decision and execution phase, warranty work and amortisation planning.
Construction work in the renovation sector
Deconstruction, alterations, minor renovations, maintenance and renovation, soft renovation, revitalisation, modernisation, Art-Sanierung and comprehensive renovation.
Trust & reputation

ranQ Trust Score of Baufamilie A. Kost: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

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Data basis 54% · As of October 2026

Baufamilie A. Kost 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%
Baufamilie A. Kost scores 72.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.86.512%
  • 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%
Baufamilie A. Kost scores 83.3 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).83.322%
Baufamilie A. Kost scores 2.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Baufamilie A. Kost reaches a ranQ Trust Score of 4.0 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

Schlossgasse 9
4057 Basel

At a glance

Legal form
Sole proprietorship
UID
CHE-115.321.672
Founded
2016 · 10 years
Last commercial register change
January 30, 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.
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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