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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,194 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsSt. GallenHänni Gartenbau - Landschaftsarchitektur AG
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Hänni Gartenbau - Landschaftsarchitektur AG

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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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.
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

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