Stahli Haustechnik Ag

What Stahli Haustechnik Ag does

Stähli Haustechnik AG is a privately held Swiss building services contractor (Aktiengesellschaft) headquartered in Winterthur with a branch in Bachenbülach. Founded in 1991 when René Stähli took over the sanitary sole proprietorship R. Lengauer, the company now operates two locations serving the greater Winterthur and Zurich region. Since 2019, ownership has rested with Reto Stähli and Urs Baltensperger following the founder family's succession.

The company's core offering spans four integrated service lines: Sanitär (plumbing and bathroom/kitchen installations, water treatment, water damage management), Heizung (heating system installation and replacement, including heat pumps, solar thermal, photovoltaics, wood-fired systems, and conventional boilers), Lüftung (bathroom and kitchen ventilation), and a 24/7 Reparatur & Service function delivered through a piquet emergency line and recurring service subscriptions. Field project managers and service technicians execute work directly at customer sites, supported by customer-facing interactive planning tools (Badplaner and Heizungsrechner) hosted on the suissetec digital platform.

The business model combines project-based one-time revenue (new installations and renovations) with recurring service contract revenue (annual Service-Abo subscriptions) and emergency repair revenue, addressed to both residential homeowners and commercial/institutional clients such as large kitchens, breweries, bakeries, and industrial facilities. The company is a suissetec member, partners with external specialists for PV installations, and runs an active apprenticeship pipeline. There are no external investors, no funding rounds, and no patents or trademarks disclosed.

Name

Stahli Haustechnik Ag

Legal name

Stähli Haustechnik AG

Website

https://staehli-haustechnik.ch

Company type

Private

Founded year

1991

Operating status

Operating

Short description

Stähli Haustechnik AG is a Swiss building services contractor providing planning, installation, and maintenance of sanitary, heating, and ventilation systems for residential and commercial clients in the Winterthur and Bachenbülach region.

Ownership category

akta.pro rank

Product category

Building Services (Plumbing, Heating, and Ventilation Contracting)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Radiant Floor Heating Installation (HSAOAGAG), Structural Drying, Dehumidification & Moisture Control (HSAPAOAB), Humidifier & Dehumidifier Installation & Service (HSAOAIAJ)

Keywords

• Building services engineering
• Plumbing installation
• Heating systems
• Ventilation services
• HVAC maintenance

Headquarters

HQ city

Winterthur

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Project-Based Sanitary and Heating Installations: New installation projects for residential (apartment buildings, single-family homes) and commercial/institutional clients (large kitchens, breweries, butcher shops, bakeries, chocolate factories, car washes). Revenue is generated as one-time project fees from design through installation to commissioning. Services include consulting, project management, installation, and on-site instruction.
2. Repair and Maintenance Services: On-demand repair services for plumbing and heating systems (24/7 piquet service), plus recurring maintenance contracts (service agreements, service subscriptions) covering filter replacement, boiler descaling, heat generator maintenance, and heat distribution system maintenance. Revenue is generated through service call fees and recurring contract revenue.
3. Consulting and Planning Services: Technical consulting for heating system selection, energy subsidy clarification (federal, cantonal, municipal subsidies), bathroom and kitchen renovation planning. Advisory revenue generated as part of project engagements or as standalone consulting fees.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Stähli Haustechnik AG is a Swiss building services contractor that plans, installs, and maintains sanitary, heating, and ventilation systems for residential and commercial buildings. The company delivers end-to-end solutions spanning bathroom renovations, kitchen and commercial plumbing installations, heat pump and solar heating systems, ventilation installations, and 24/7 emergency repair and maintenance services across the Winterthur region.

Product overview

Stähli Haustechnik AG is a building services company offering an integrated portfolio of plumbing (Sanitär), heating (Heizung), ventilation (Lüftung), and repair/maintenance (Reparatur & Service) solutions. The company operates as a single unified service offering rather than a modular software platform. Core services include bathroom and kitchen installations, heating system installations (heat pumps, solar, wood-fired), bathroom and kitchen ventilation, plus 24/7 emergency repair services. The company also provides digital planning tools (Badplaner and Heizungsplaner) through a partnership with suissetec for customer self-service bathroom and heating planning. Founded in 1991, the company serves the Winterthur region with headquarters in Winterthur and a branch in Bachenbülach.

Differentiator

Problem solved

Functional benefit

Products and services

• Sanitär (Plumbing Services) Complete plumbing services including bathroom remodeling, kitchen installations, new construction water systems, water softening/decalcification, and commercial/gastronomy installations for businesses such as large kitchens, breweries, butcheries, and bakeries.
• Heizung (Heating Services) Comprehensive heating solutions including heat pump installation (air, ground, or groundwater sources), solar thermal and photovoltaic systems, wood-fired systems, district heating connections, boiler replacements, and full execution from consultation to commissioning.
• Lüftung (Ventilation Services) Ventilation solutions for residential buildings including bathroom exhaust systems and kitchen exhaust hoods to maintain fresh air quality and remove cooking odors and moisture.
• Reparatur & Service (Repair and Maintenance Services) 24/7 emergency repair services for plumbing and heating systems including filter replacement, boiler descaling, water damage response (preventive monitoring, structural drying, insurance coordination, restoration), heat generator maintenance, and heat distribution system servicing. Offers annual service subscription plans (Service-Abo).

Quantifiable outcome

• Solar thermal can reduce hot water energy needs by 20–30%
• +4 more outcomes

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• suissetec (Schweizerisch-Liechtensteinischer Gebäutechnikverband)coreChannel Partner/ Reseller/ Distributorsuissetec is the Swiss-Liechtenstein building technology industry association. The company's website is built on suissetec's web platform (Weblösung von suissetec). The company is a member of suissetec and its interactive planning tools (Badplaner, Heizungsrechner) are powered by suissetec's digital infrastructure. suissetec membership provides industry credibility, training standards, and digital tools for Stähli's customer-facing services.
• Driving-Park AGminorOthersDriving-Park AG (Winterthur) provides driving safety training and team-building event logistics for Stähli Haustechnik. They organized the 33-year anniversary trip logistics (car transportation to Fiss, Austria) and conducted safety training sessions including driving training with company vehicles (Ford Transits) and load securing.
• Churrasco do Elias GmbHminorOthersCatering company from Kollbrunn engaged for summer and bonus events, providing grill buffet services for company celebrations.
• Solar/Photovoltaik Installation PartnersminorStrategic or Co-development PartnerFor photovoltaic (solar electricity) installations, Stähli Haustechnik partners with external specialists to provide complete installation services. Stähli manages the customer relationship and coordinates with partners for PV system installation.

Scale indicators3 records

Recent moves12 records

Expansion highlights5 records

Direct peers

• Meier + Partner Haustechnik AG: Meier + Partner Haustechnik is a Swiss regional plumbing and heating contractor with comparable offerings (Sanitär, Heizung, Service) for residential and commercial clients. It is a direct peer to Stähli in size, scope, and go-to-market as a regional full-service Haustechnik firm.
• Suter Haustechnik AG: Suter Haustechnik AG is a Swiss Haustechnik contractor offering plumbing, heating, and ventilation services for residential and commercial clients. It is directly comparable to Stähli as a similarly sized regional full-service Haustechnik provider competing in the same Swiss trades market.
• Hälg & Co. AG: Hälg & Co. AG is a Swiss building services (Gebäudetechnik) provider offering heating, ventilation, air-conditioning, and refrigeration across multiple Swiss locations. It is comparable to Stähli in core Haustechnik services but operates as a larger, multi-site regional/national contractor.
• Karrer + Co AG Haustechnik: Karrer + Co AG Haustechnik is a Swiss regional Sanitär, Heizung, and Lüftung contractor serving homeowners and commercial clients. It is a direct peer to Stähli given similar regional full-service Haustechnik positioning and customer segment mix.
• Wisler Haustechnik AG: Wisler Haustechnik AG is a Swiss regional Sanitär/Heizung/Lüftung contractor serving private and commercial customers with planning, installation, and service. It is directly comparable to Stähli as a same-size regional Swiss Haustechnik full-service provider with a comparable customer mix.

Broad incumbents

• swisspro Group: swisspro is a national Swiss MEP and ICT services group covering Sanitär, Heizung, Lüftung, Elektro, and Sicherheit. It is comparable to Stähli in offering integrated building technology services across Switzerland, but at much greater scale and with a broader portfolio of trades.
• Implenia AG: Implenia is Switzerland's largest construction and real estate services group, covering building construction, civil engineering, and real estate. While much broader than Stähli, Implenia engages MEP/Haustechnik subcontractors on its projects and competes for the same institutional and commercial clients in the Zurich region.
• EQUANS Switzerland: EQUANS Schweiz (formerly ENGIE Solutions / Inelec) is a major Swiss facilities and technical building services provider. It is comparable to Stähli as a Swiss MEP/Haustechnik services provider but operates nationally and internationally with a much wider service portfolio, including large-scale facility management.
• Bouygues Energies & Services Schweiz: Bouygues E&S InTec Schweiz is a national Swiss MEP and building services contractor offering Sanitär, Heizung, Lüftung, Elektro, and building automation. It is comparable to Stähli in delivering integrated Haustechnik services but operates across Switzerland and internationally with significantly larger resources.
• Burkhalter Group: Burkhalter Group is the largest Swiss electrical and building-services contractor (MEP), listed on SIX Swiss Exchange. It is comparable to Stähli as a Switzerland-based MEP services provider but operates at vastly larger scale and broader geographic reach, with electrical services as a core line.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Customer concentration

• Facebookfacebook.com/staehli1991

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Stahli Haustechnik Ag