S2L Landschaftsarchitektur BSLA SIA

What S2L Landschaftsarchitektur BSLA SIA does

S2L Landschaftsarchitektur BSLA SIA (legally S2L GmbH) is a Zürich-headquartered Swiss landscape architecture and urban design firm founded in 2015 by Daia Stutz and Jan Stadelmann. Operating as a BSLA- and SIA-accredited professional services practice with roughly 17 team members (9 reported core staff, plus architects, urban designers, transport planners and apprentices), the firm specializes in climate-adaptive public-space design — applying sponge-city (Schwammstadt) stormwater management, urban heat mitigation through the proprietary "Klima-Kits" framework, biodiversity enhancement, and processual/participatory park development to Swiss municipal and cantonal mandates.

The firm's project portfolio spans urban open-space concepts, street redesigns (Brauerstrasse Zürich), residential estate masterplans for housing cooperatives (BBZ Brunnnenhof, BGZ Sül-Ost, Logis Suisse), school grounds (Kantonsschule Limmattal: 130 trees), regional open-space frameworks (Leitbild Limmatraum adopted by Zürich City Council January 2025; Freiraumnetz Davos), and large-scale infrastructure integration (A2 Luzern-Süd with ASTRA). Methodologically, S2L develops specialized climate-resilience frameworks — testing 84 permeable paving surface combinations at the Oerlikon sponge-city pilot with ZHAW monitoring, designing the 170-metre Gleispool natural swimming pool reusing former rail infrastructure at Dreispitz Basel, and iterating participatory park design at Josef-Areal. Project wins are sourced through Swiss public procurement competitions and selective study commissions, where the firm holds a track record of 30+ first and second prizes across 2014-2026.

S2L's revenue model is professional services consulting: project-based fees negotiated under Swiss public procurement rules or private development contracts, with no subscription, product, or recurring revenue streams. Go-to-market runs exclusively through competitive tenders, public study commissions, and interdisciplinary team partnerships with repeat collaborators including pool Architekten, Hosoya Schaefer Architects, and Studio Trachsler Hoffmann. Customers are concentrated in Swiss public sector (Stadt Zürich via TAZ and Grün Stadt Zürich; Kanton Zürich; ASTRA federal; cities of Basel, Winterthur, Baden, Davos) plus private foundations (Christoph Merian Stiftung for the Dreispitz portfolio) and housing cooperatives. The firm is founder-controlled, privately held, with no external investors, M&A activity, or subsidiaries disclosed.

Name

S2L Landschaftsarchitektur BSLA SIA

Legal name

S2L GmbH

Website

https://s2l.ch

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

S2L Landschaftsarchitektur is a Zürich-based Swiss landscape architecture and urban design firm serving municipalities, cantons, foundations, and housing cooperatives with climate-adaptive open-space, sponge-city, biodiversity, and participatory planning services across Switzerland.

Ownership category

akta.pro rank

Product category

Landscape Architecture Services

NAICS

Landscape Architectural Services (541320), Landscape Architectural Services (54132)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Landscape Architecture & Site Design (BPAHAKAC)

akta.pro secondary industry

Community Engagement & Participatory Planning (BPAHAKAO)

Keywords

• Landscape architecture services
• Urban design planning
• Public space design
• Climate adaptation planning
• Master planning services

Headquarters

HQ city

Zürich

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Landscape Architecture & Urban Design Consultancy: S2L generates revenue through fees for landscape architecture and urban design services on public and private development projects. Revenue is project-based, derived from awarded commissions, study mandates, competition prizes leading to contracts, and ongoing masterplan or monitoring mandates. No subscription or product-based revenue model applies — this is a professional services firm operating in the Swiss public procurement market.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

S2L is a Zürich-based landscape architecture and urban design firm providing planning, design, and consulting services for public open spaces, streets, parks, residential environments, and school grounds. Its work focuses on climate adaptation (heat mitigation, sponge-city stormwater management), biodiversity enhancement, and participatory urban design, delivered under Swiss public procurement tenders, study commissions, and direct private commissions. The firm partners with architecture practices, engineering consultancies, and academic institutions (notably ZHAW) to deliver interdisciplinary projects across Switzerland.

Product overview

S2L Landschaftsarchitektur BSLA SIA is a landscape architecture and urban design firm based in Zürich, Switzerland. The company offers a comprehensive portfolio of landscape architecture services centered around public space design, urban development, and climate adaptation. Their core offering includes landscape architecture and urban design services, supported by specialized service modules such as open space concepts (Freiraumkonzepte), master planning, sponge city solutions (Schwammstadt), pilot projects for heat mitigation, and process-based park development. The company focuses on climate adaptation, biodiversity enhancement, and sustainable urban development, working interdisciplinarily with various stakeholders to create resilient public spaces.

Differentiator

Problem solved

Functional benefit

Products and services

• Landscape Architecture & Urban Design Services Comprehensive landscape architecture and urban design services for Swiss municipal, cantonal, federal, and private clients, covering public squares, parks, residential environments, school grounds, and schoolyards with emphasis on climate adaptation and biodiversity.
• Freiraumkonzepte (Open Space Concepts) Development of comprehensive open-space concepts for urban areas, including analysis, design principles, and implementation strategies for public green spaces (e.g., Freiraumkonzept Dreispitz, Freiraumkonzept Davos).
• Masterplanung (Master Planning) Strategic master planning services for large-scale urban development projects, coordinating multiple stakeholders and long-term development visions (e.g., Wissensquartier Winterthur, Leitbild Limmatraum).
• Schwammstadt-Lösungen (Sponge City Solutions) Climate adaptation solutions implementing the sponge-city principle for on-site rainwater infiltration, evaporation, and retention to reduce urban heat and improve climate resilience (e.g., Brauerstrasse Zürich, Dreispitz Basel).
• Pilotprojekt Hitzeminderung (Heat Mitigation Pilot Projects) Testing of permeable surfaces, substrates, and configurations for parking lots and sidewalks, conducted in collaboration with ZHAW, with monitoring of water permeability, temperature, functionality, design, and ecology.
• Prozessuale Parkentwicklung (Process-Based Park Development) Collaborative and participatory park development approaches involving local populations in planning and testing temporary uses before permanent implementation (e.g., Josef-Areal 'Josefina macht Stadtklima').

Quantifiable outcome

• Gleispool Dreispitz: planned to serve up to 50,000 users per season as a natural swimming pool with biological filtration, planned to open Summer 2027.
• +3 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eleven partnerships are on record, tiered core and regular.

• Christoph Merian Stiftung, BaselcoreStrategic or Co-development PartnerOngoing strategic partnership on Dreispitz area transformation — S2L leads open-space concept for the 50-hectare industrial area in Basel/Münchenstein, commissioned by CMS. Also collaborated on Gleispool natural swimming pool and Merian Gärten development concept.
• pool Architekten, ZürichcoreStrategic or Co-development PartnerFrequent collaboration partner in interdisciplinary teams. Shared project mandates include Sonnenhof Bülach, Stammsiedlung BBZ, Walder Areal Wangen-Brüttisellen, A2 Luzern-Süd test planning, and others.
• Hosoya Schaefer Architects, ZürichcoreStrategic or Co-development PartnerRegular collaboration partner on urban studies. Joint projects include Bahnhof Herrliberg-Feldmeilen (1st prize), Seeufer Wollishofen masterplan, Entwicklungskonzept Würzenbach, and St.-Karli-Brückenköpfe study.
• ZHAW — Zürcher Hochschule für angewandte Wissenschaften, Institut Umwelt und Natürliche RessourcencoreStrategic or Co-development PartnerResearch partnership on Schwammstadt pilot project in Oerlikon — ZHAW conducts monitoring of 84 permeable surface combinations for water permeability, temperature, and ecological performance, providing data for city-wide standards.
• Suter von Känel Wild (SVKW)regularStrategic or Co-development PartnerEcological and water engineering partner on multiple projects including Leitbild Limmatraum (ecology, water, transport) and Freiraumnetz Agglo Biel/Lyss.
• Oekoskop (Ökologie, Biodiversität)regularTechnology or IntegrationEcology and biodiversity specialist providing ecological impact assessment and biodiversity enhancement planning. Partner on Dreispitz Freiraumkonzept, Gleishof Mailandstrasse, and Josefina macht Stadtklima.
• Transsolar (Stadtklima & Energie)regularTechnology or IntegrationClimate and energy engineering firm collaborating on the Dreispitz Freiraumkonzept to integrate urban climate analysis.
• Denkstatt sàrl (Sozialraum)regularStrategic or Co-development PartnerSociology and social-space consultancy. Partner on Josefina macht Stadtklima (participatory process) and Seeufer Wollishofen.
• Studio Trachsler Hoffmann, ZürichregularStrategic or Co-development PartnerArchitecture partner on residential projects including BG Süd-Ost Tulpenweg (1st prize) and Wohnsiedlung Im Gut (2nd prize).
• TAZ Tiefbauamt Stadt ZürichcoreStrategic or Co-development PartnerPrimary public client for multiple flagship projects: Brauerstrasse redesign, Gesamtkonzept Strassenräume Altstetten West, Pilot project heat mitigation Oerlikon, Guideline Quickwins Hitzeminderung. S2L has an ongoing advisory relationship with TAZ.
• Grün Stadt ZürichcoreStrategic or Co-development PartnerClient for Leitbild Limmatraum (with TAZ, AfS, AWEL), Josef-Areal participatory park development, and Seeufer Wollishofen.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Hager Partner AG Landschaftsarchitektur: Bern/Zürich-based landscape architecture firm with comparable portfolio in urban open-space concepts, school grounds, and residential environments. Active in BSLA and SIA competitions alongside S2L on the same Swiss public-sector tender market.
• Studio Bürgi Köppel Landschaftsarchitekten: Zürich-based landscape architecture practice with comparable portfolio in Swiss urban open-space, public realm, and residential landscape projects. Active in the same competition pool as S2L.
• Vetschpartner Landschaftsarchitekten AG: Long-established Swiss landscape architecture firm headquartered in Zürich, offering comparable urban open-space, masterplanning, and public-sector landscape services. Direct competitor for the same Swiss municipal and cantonal competition mandates S2L targets.
• Topotek 1 Gesellschaft von Landschaftsarchitekten mbH: Berlin/Hamburg-based landscape architecture firm with strong portfolio in urban open-space, public-space redesign, and landscape masterplans. Comparable in scale, interdisciplinary approach, and competition-based BD, with international reach S2L lacks.
• Atelier Loidl Landschaftsarchitekten: Berlin-based landscape architecture firm comparable in scope (urban open space, masterplans, climate-adaptive design) and competition-driven project acquisition. International peer reference for S2L's methodology at a similar studio scale.
• Klötzli + Co. Landschaftsarchitekten AG: Swiss landscape architecture firm with comparable municipal, residential, and infrastructure open-space work, frequently participating alongside S2L in selective study commissions and competition mandates.
• Vogt Landschaftsarchitekten (Günther Vogt): Zürich-based landscape architecture firm led by Günther Vogt (ETH professor), a direct precedent mentor to S2L co-founder Daia Stutz. Operates in the same premium Swiss public and institutional competition space as S2L, including urban open-space and masterplan mandates.

Others

• Studio Vulkan Landschaftsarchitektur:

Emerging players

• Bureau B+B urbanism and landscape architecture: Dutch firm with strong focus on urban landscape, public space, and climate-adaptive design. Comparable in design philosophy and competition-driven BD model; provides a relevant peer reference for S2L's participatory and climate-resilient methodology at a similar scale.

Broad incumbents

• West 8 Urban Design & Landscape Architecture: Larger, internationally established Dutch landscape and urban design firm operating broadly in the same public-space, climate-adaptation, and masterplanning domain. Overlaps with S2L's offering as a broader incumbent serving large European municipal clients.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/s2l-landschaftsarchitekten-bsla-sia

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about S2L Landschaftsarchitektur BSLA SIA