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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceBaselAjra Bau+Renovationen GmbH
Ajra Bau+Renovationen GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company is a construction company that offers a wide range of services in the field of construction, including: renovation and refurbishment of buildings; new construction and renovation of facades, windows, roofs, interior finishing, electrical and sanitary installations, heating systems and alarm systems; painting, plastering, stucco and wallpapering; roofing, carpentry and joinery; construction management, excavation and earthworks; and planning and coordination of construction projects. The company thus offers a comprehensive range of services for the construction and renovation of buildings and positions itself as a full-service provider in the construction industry.

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Offering

Products & services

Industry:Building Maintenance
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4.5/5

Ajra Bau+Renovationen GmbH

✓ Offered7
Construction management / project management
Construction management, construction trustee services, project management, building permits, planning, site management and construction execution for conversion and renovation projects.
Painting work
Painting work on ceilings, walls, windows and doors; lettering and markings, wallpapering, puttying, glazing techniques and further finishing work.
Plastering / stucco work
Plastering work with wet plaster, renovation plaster systems, Stucco Veneziano, lightweight partition walls, ceiling claddings, acoustic ceilings, insulation, crack repairs, facade rendering and basement renovations.
Floor / wall coverings
Laying, sanding and renovating parquet, laminate, carpet, PVC and Novilon, as well as tile work, mosaic work, natural stone work and bathroom renovations.
Roofing
Roofing work with tiles, natural slate, Biberschwanz tile coverings, underroofing, roof structures, screed insulation, Velux windows, dormers, sheet-metal work, flat roofs, liquid plastic and bituminous systems.
Timber construction / carpentry
General carpentry work, screed build-outs, custom dormers, beam restoration, doors and made-to-measure items for kitchens, cupboards and other woodwork.
Civil engineering works
Excavation and trenching work, excavator deployment and core drilling for construction and conversion projects.
Trust & reputation

ranQ Trust Score of Ajra Bau+Renovationen GmbH: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Ajra Bau+Renovationen GmbH scores 98.2 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.96.824%
  • 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.100.010%
  • 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.100.08%
Ajra Bau+Renovationen GmbH scores 75.7 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.83.012%
  • 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%
Ajra Bau+Renovationen 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%
Ajra Bau+Renovationen GmbH scores 2.3 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 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ajra Bau+Renovationen GmbH reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 5.0 out of 5 stars from 99 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
5
of 5

Aggregated from 99 reviews across all connected sources

Sources
GGoogle599
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Vogesenstr. 31
4056 Basel
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-387.524.560
Founded
2017 · 9 years
Last commercial register change
July 10, 2017
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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