CORTI Bau
CORTI Bau (CORTI AG) is a 155-year-old Swiss family-owned construction company in the Bauhauptgewerbe, headquartered in Winterthur. It delivers new construction, renovation, and stone/slab work for residential, commercial, and public-sector clients across the Zurichsee-to-Bodensee region.
- Company typePrivate
- Founded1869
- HeadquartersWinterthur, Switzerland
- Headcount11–50
- GTM typeB2B
- OfferingServices
What CORTI Bau does
CORTI AG, operating under the brand name CORTI Bau, is a Swiss construction company (Bauunternehmung) in the main construction trade (Bauhauptgewerbe), founded in 1869 and headquartered at Klosterstrasse 19 in Winterthur. The company is a privately held family business (Familienunternehmen) within the CORTI SPLEISS Gruppe conglomerate, managed by Geschäftsführer Simon Hasler. It offers three core service lines: Neubau (new construction for residential, commercial, and industrial buildings), Umbau (renovation and conversion of existing structures), and Steine und Platten (natural and artificial stone installation). The company executes projects ranging from exclusive single-family homes to industrial facilities and heritage-listed buildings, with documented references including the Kunst Museum Winterthur, multiple Schulhaus projects, indoor swimming pools, and commercial new-builds.
The business model is project-based and quote-driven: revenue is generated through one-time construction contracts (multi-year in duration) awarded via direct sales, project bidding, and referrals, with pricing determined per project scope. Customer segments split between private property owners/developers and the public sector (municipalities, schools, cultural institutions). The company employs between 250 and 999 people per the Best Employer 2025 award category and operates a regional footprint spanning the Zurichsee to Bodensee corridor. Recent project activity in 2025-2026 covers Winterthur, Zürich, Schaffhausen, Frauenfeld, Horgen, Turbenthal, Uster, Mönchaltorf, Dübendorf, and Pfyn, including specialized work in seismic retrofitting and facade renovation. Marketing is conducted through the company website, Instagram (@corti_spleiss), LinkedIn, YouTube, news/PR, and event sponsorships (Stefan Rogentin ski sponsorship, InfraPartner role at Winterthurer Musikfestwochen). No external funding, M&A activity, or disclosed revenue figures are present in the input data, consistent with a privately held, family-owned mid-sized regional contractor.
CORTI Bau firmographics
Firmographics- Name
- CORTI Bau
- Legal name
- CORTI AG
- Website
- https://cortibau.ch
- Company type
- Private
- Founded year
- 1869
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- CORTI Bau (CORTI AG) is a 155-year-old Swiss family-owned construction company in the Bauhauptgewerbe, headquartered in Winterthur. It delivers new construction, renovation, and stone/slab work for residential, commercial, and public-sector clients across the Zurichsee-to-Bodensee region.
- Ownership category
- akta.pro rank
CORTI Bau industry classification
Industry- Product category
- Construction Services
- NAICS
- Industrial Building Construction (23621)
- SIC
- General Bldg Contractors - Residential Bldgs (1520), General Bldg Contractors - Nonresidential Bldgs (1540)
- akta.pro primary industry
- Residential General Contracting (New Build) (IMAFAAAB)
Keywords
Where CORTI Bau is headquartered
LocationHeadquarters
- HQ city
- Winterthur
- HQ country
- Switzerland
- HQ region
- Europe
Offices1 record
Markets served
CORTI Bau business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales, Others
Revenue model
- Construction Project Services: CORTI AG generates revenue through one-time construction projects including new builds, renovations, and stone/plate work for residential, commercial, and public sector clients. Projects range from exclusive single-family homes to industrial and commercial buildings.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based pricing - quotes provided per project |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
CORTI Bau product offering
Product offeringCore offering
CORTI AG (operating as CORTI Bau) is a Swiss construction company in the Bauhauptgewerbe (main construction trade) providing new construction (Neubau), renovation and conversion (Umbau), and natural and artificial stone installation (Steine und Platten) for residential, commercial, industrial, and public-sector buildings. Projects range from exclusive single-family homes to large industrial and commercial facilities across the Lake Zurich to Lake Constance region.
Product overview
CORTI Bau is a construction company (Bauunternehmung) operating in the main construction trade (Bauhauptgewerbe). The company offers three core service offerings: (1) Neubau (New Construction) for residential and commercial buildings, (2) Umbau (Renovation/Conversion) for existing structures, and (3) Steine und Platten (Stones and Slabs) for natural and artificial stone work. Services span the region from Lake Zurich to Lake Constance, covering projects from exclusive single-family homes to industrial and commercial buildings. Founded in 1869, the company emphasizes quality, schedule reliability, and comprehensive construction expertise.
Differentiator
Problem solved
Functional benefit
Products and services
- Neubau (New Construction)
- Umbau (Renovation and Conversion)
- Steine und Platten (Stones and Slabs)
Companies that use CORTI Bau
Customer profileNamed customers9 records
Segments2 records
Ideal customer profiles3 records
CORTI Bau technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
CORTI Bau partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Winterthurer MusikfestwochenminorCORTI AG serves as InfraPartner (infrastructure partner) for the Winterthurer Musikfestwochen, an annual music festival in Winterthur. This sponsorship provides brand visibility and community engagement.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
CORTI Bau competitors and assessment
Company assessmentDirect peers
- Anliker AG: Swiss general contractor headquartered in Lucerne, providing building construction, renovation, and civil engineering services. Comparable mid-sized regional general contractor with similar service breadth and public sector reference base.
- Marti AG: Swiss family-owned construction group active in Hochbau, Tiefbau, and Spezialtiefbau across Switzerland. Highly comparable to CORTI AG given similar family-ownership heritage, regional Swiss footprint, and broad building construction service offering.
- Frutiger AG: Swiss construction group active in building construction, infrastructure, and construction materials supply. Comparable as a mid-sized Swiss family-influenced general contractor serving both private and public clients in German-speaking regions.
- Zschokke Generalunternehmung AG: Swiss general contractor and total services provider (Totalunternehmer) active in building construction, renovation, and development across German-speaking Switzerland. Comparable in service model and Swiss regional footprint, though operating with a broader turnkey project focus.
- Walo Bertschinger AG: Long-established Swiss general contractor (founded 1917) active in building construction, civil engineering, and road construction across German-speaking Switzerland. Comparable regional general contractor with similar heritage positioning and public-sector exposure.
- Eberhard Bau AG: Swiss family-owned construction group (founded 1897) covering building construction, civil engineering, and demolition. Highly comparable to CORTI AG in family heritage, regional Swiss focus, and combined Neubau/Umbau service model.
Broad incumbents
- Implenia AG: Switzerland's largest publicly listed construction and real-estate services company, offering building construction, civil engineering, and real estate development. Overlaps with CORTI AG's Neubau/Umbau activities but at significantly larger national scale and broader portfolio.
- Hochtief AG: Major European construction group (controlled by ACS Group) with significant presence in Switzerland and German-speaking markets. Overlaps with CORTI AG on building construction but competes from a much larger balance sheet and broader project scope.
- BAM Group: Major Dutch-headquartered European construction group with building construction and civil engineering operations across Switzerland and German-speaking Europe. Comparable on building construction activity but at significantly larger international scale.
- STRABAG SE: One of Europe's largest construction groups with significant operations in Switzerland. Operates broadly across building and civil construction; comparable as a competitor for large-scale Swiss building contracts but with much larger geographic and service scope.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
CORTI Bau social profiles
Digital presenceCORTI Bau financial estimates
Financial estimateRevenue estimate
Valuation estimate
CORTI Bau leadership team
Management profileNumber of profiles
Profiles1 record
CORTI Bau funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CORTI Bau M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CORTI Bau
What does CORTI Bau do?
CORTI AG (operating as CORTI Bau) is a Swiss construction company in the Bauhauptgewerbe (main construction trade) providing new construction (Neubau), renovation and conversion (Umbau), and natural and artificial stone installation (Steine und Platten) for residential, commercial, industrial, and public-sector buildings. Projects range from exclusive single-family homes to large industrial and commercial facilities across the Lake Zurich to Lake Constance region.
Is CORTI Bau a public or private company?
CORTI Bau is a private company. It is classified as family owned and is currently operating.
When was CORTI Bau founded?
CORTI Bau was founded in 1869. It employs 11 to 50 people.
Where is CORTI Bau based?
CORTI Bau is headquartered in Winterthur, Switzerland, in the Europe region.
How does CORTI Bau make money?
One revenue line is on record: construction Project Services.
Who are CORTI Bau's main competitors?
Direct peers on record are Anliker AG, Marti AG, Frutiger AG, Zschokke Generalunternehmung AG, Walo Bertschinger AG and Eberhard Bau AG. Broad incumbents are Implenia AG, Hochtief AG, BAM Group and STRABAG SE.
Does CORTI Bau have an API?
No public API is recorded for CORTI Bau.
What industry is CORTI Bau in?
CORTI Bau's product category is Construction Services. Its primary akta.pro industry code is IMAFAAAB, Residential General Contracting (New Build). Its NAICS code is 23621 and its SIC code is 1520.