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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionBaselALBRECHT + RITZMANN GmbH
ALBRECHT + RITZMANN GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Albrecht + Ritzmann is the planning and execution of renovation and new construction projects, the renovation of single-family and multi-family homes, interior design, the renovation of historic buildings, as well as the development of restoration concepts for historic buildings. The company thus offers comprehensive services in the field of architecture and construction, with a special focus on the renovation and restoration of historic buildings.

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Products & services

Industry:Building Construction
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3.7/5

ALBRECHT + RITZMANN GmbH

6
Planning and execution of conversions and new builds
Planning and execution of conversions and new builds, from planning to realization of construction projects in the building sector.
Renovation of single- and multi-family homes
Renovation of single- and multi-family homes, including adjustments and renewal work on existing residential buildings.
Interior fit-out
Interior fit-out for residential and existing buildings, with work on interior design and structural execution of interior rooms.
Renovation of historic building fabric
Renovation of historic building fabric, with professional handling of listed buildings and existing historic structures.
Inventorying historic buildings
Inventorying historic buildings as part of work on historic and listed building fabric.
Development of restoration concepts
Development of restoration concepts for historic buildings and valuable building fabric worthy of protection.
Trust & reputation

ranQ Trust Score of ALBRECHT + RITZMANN GmbH: 3.7 out of 5.0

Trust Score3.7/ 5.0

Solid

x

Data basis 96% · As of October 2026

ALBRECHT + RITZMANN GmbH scores 47.2 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.63.624%
  • 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.17.610%
  • 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.35.08%
ALBRECHT + RITZMANN GmbH scores 82.0 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.97.712%
  • 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%
ALBRECHT + RITZMANN GmbH 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%
ALBRECHT + RITZMANN GmbH scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ALBRECHT + RITZMANN GmbH reaches a ranQ Trust Score of 3.7 out of 5.0 — rated «Solid». The rating draws, among other things, on 4.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle41
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

St.Johanns-Vorstadt 23
4056 Basel

At a glance

Legal form
Limited Liability Company
UID
CHE-373.061.298
Founded
2012 · 14 years
Last commercial register change
July 17, 2020
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.
88.0
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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