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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsSt. GallenHänni Gartenbau - Landschaftsarchitektur AG
Hänni Gartenbau - Landschaftsarchitektur AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Hänni Gartenbau-Landschaftsarchitektur AG encompasses the planning, design, construction and maintenance of gardens, landscapes and outdoor facilities for private and public clients. This includes the creation of landscape architecture plans, the execution of garden and landscape construction work, the maintenance and upkeep of existing facilities, as well as the realization of special projects such as pool installations, green roofs and renaturalizations.

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Products & services

Industry:Architecture Firms
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4.1/5

Hänni Gartenbau - Landschaftsarchitektur AG

✓ Offered7
Landscaping
New installations, garden redesigns, pool facilities, flat roof greenings, as well as maintenance work for private gardens, properties, residential estates, company and public sites.
Landscape architecture
Planning of outdoor spaces and landscapes for private and public clients, from site surveys and documentation through building permit submissions and tenders to detailed design and construction management.
Outdoor design
Design of private gardens, park facilities and outdoor spaces using plant-based and structural elements such as paths, seating areas, natural stone, metal, wood, glass, fountains and ponds.
Renaturation and enhancements
Renaturation and landscape enhancements for public projects as well as for the surroundings of private construction projects, taking into account local and regional conditions.
Water and waterworks in the garden
Creation and integration of ponds and other water features in the garden, including embankment and bank design as well as water-engineering projects.
Green roof landscaping
Flat roof greenings as part of garden and site works for private and commercial sites.
Planting and garden maintenance
Careful planting with trees, shrubs, hedges, flowers and grasses, as well as ongoing maintenance work for well-kept facilities and year-round attractive grounds.
Trust & reputation

ranQ Trust Score of Hänni Gartenbau - Landschaftsarchitektur AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 58% · As of October 2026

Without public customer reviews the score stays capped.

Hänni Gartenbau - Landschaftsarchitektur AG 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%
Hänni Gartenbau - Landschaftsarchitektur AG scores 92.3 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.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.82.07%
Hänni Gartenbau - Landschaftsarchitektur AG 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%
Hänni Gartenbau - Landschaftsarchitektur AG scores 25.0 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 35.40.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

Hänni Gartenbau - Landschaftsarchitektur AG reaches a ranQ Trust Score of 4.1 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 58%, 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.

Press

Media

September 5, 2023Media
Neuer St.Galler Klostergarten: Unternehmer Christian Hänni will Insekten fördern
tagblatt.ch

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Location

Altwinkelnstrasse 23
9015 St. Gallen

At a glance

Legal form
Corporation
UID
CHE-114.645.126
Founded
2008 · 18 years
Last commercial register change
March 11, 2026
Employees
21 to 50
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.100.06%
  • 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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