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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionZurichT & T Bischoff Bau - Service, Inhaber Dediu
T & T Bischoff Bau - Service, Inhaber Dediu Logo
Verified· 2 sourcesTrust Score
Summary

About the company

T & T Bischoff Bau - Service, Inhaber Dediu is a construction and trades company focused on renovation, remodeling and refurbishment. Its services include tiling, painting, plastering, demolition, bathroom renovation, rendering and core drilling.

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Offering

Products & services

Industry:Interior ConstructionFlooring & TilingPainting & Plastering
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T & T Bischoff Bau - Service, Inhaber Dediu

✓ Offered8
Renovation & Remodeling
Renovation and remodeling of apartments, houses and individual rooms; including coordination of tiling, painting, plastering and demolition work, plus other trades as needed.
Bathroom Renovation
Bathroom renovation and remodeling; with demolition, waterproofing, tiling, plastering and drywall work, painting, and coordinated plumbing and electrical work if needed.
Tiling & Floor/Layering Work
Installation of wall and floor tiles, natural stone and mosaic for indoor and outdoor areas; including grouting, waterproofing and substrate preparation.
Painting Services
Interior and exterior painting, facade finishing, wallpapering, as well as varnishing and wood painting; also touch-ups and move-in or move-out painting.
Plastering & Drywall
Drywall construction, suspended ceilings, plastering, stucco and wall finishing; including filling, smoothing and surface work for new build and remodeling projects.
Demolition & Dismantling
Controlled demolition, strip-out and dismantling of interior spaces and building parts; including sorted disposal, dust protection and preparation for rebuilding.
Rendering & Plaster Finishing
Interior and exterior plastering, facade render and decorative textured finish; for smooth walls, durable surfaces and protection of the building fabric.
Core Drilling & Openings
Core drilling in concrete, reinforced concrete and masonry, plus wall and masonry openings for pipes, doors and open-plan layouts.
Trust & reputation

ranQ Trust Score of T & T Bischoff Bau - Service, Inhaber Dediu: 3.5 out of 5.0

Trust Score3.5/ 5.0

Solid

x

Data basis 54% · As of October 2026

T & T Bischoff Bau - Service, Inhaber Dediu 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%
T & T Bischoff Bau - Service, Inhaber Dediu scores 46.3 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.25.012%
  • 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.55.07%
T & T Bischoff Bau - Service, Inhaber Dediu 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%
T & T Bischoff Bau - Service, Inhaber Dediu scores 0.6 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 35.0.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

T & T Bischoff Bau - Service, Inhaber Dediu reaches a ranQ Trust Score of 3.5 out of 5.0 — rated «Solid». 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

Siewerdtstrasse 75
8050 Zurich

At a glance

Legal form
Sole proprietorship
UID
CHE-409.477.161
Founded
2025 · 1 year
Last commercial register change
September 3, 2025
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.67.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
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