Sedlak Bau & Immobilien

What Sedlak Bau & Immobilien does

Sedlak Bau & Immobilien is a Vienna-based construction and real estate group founded in 1945. Its operating businesses cover construction, renovation, maintenance, integral planning, technical property services, real estate development, sales and rentals. The group serves individual residential buyers, renters, private and institutional investors, property administrators, and commercial and institutional clients.

Delivery is organized as an integrated chain from land acquisition and development through planning, construction and handover, with Sedlak Immobilien operating alongside the construction company. Its disclosed technical stack includes BIM-based integral planning, Lean Construction, digital building twins and building passports, the proprietary IMMOSCAN inspection system and the Greenline sustainability standard. The company also reports ISO 37001, ISO 37301 and ISO 14001 certifications, as well as project-level sustainability credentials.

Revenue is generated through project-based construction and planning contracts, development and sale of apartments, recurring rent from retained residential assets, and maintenance or inspection services. Real estate pricing is project-specific, construction work is quoted through consultation or tender processes, and selected projects offer a five-year rent-to-buy option with a 10% down payment. Go-to-market activity is predominantly direct through property websites, consultations, business development and tenders, primarily in Vienna and Lower Austria.

Name

Sedlak Bau & Immobilien

Legal name

Dipl. Ing. Wilhelm Sedlak Gesellschaft m.b.H.

Website

https://sedlak.co.at

Company type

Private

Founded year

1945

Operating status

Operating

Headcount range

11–50 employees

Short description

Sedlak is a Vienna-based construction and real estate group serving residential buyers, renters, investors, property administrators, and institutional clients with integrated development, contracting, planning, renovation, and property services in Austria.

Ownership category

akta.pro rank

Product category

Real Estate Development & Construction Services

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (54133)

SIC

General Bldg Contractors - Residential Bldgs (1520), General Bldg Contractors - Nonresidential Bldgs (1540), Land Subdividers & Developers (No Cemeteries) (6552)

akta.pro primary industry

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

akta.pro secondary industry

Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK)

Keywords

• General construction services
• Building renovation services
• Real estate development
• BIM planning services
• Technical facility management

Headquarters

HQ city

Wien

HQ country

Austria

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Real Estate Development & Sales: Development and sale of residential properties (freifinanzierte Eigentumswohnungen) through Sedlak Immobilien subsidiary. The company develops properties from land acquisition through to handover, selling apartments directly to end buyers. Also includes rent-to-buy (Miet-Kauf) models in selected projects.
2. Rental Income: Revenue from freifinanzierte Mietwohnungen (privately financed rental apartments) developed by Sedlak Immobilien and rented to tenants.
3. Construction Services: General contractor and total contractor services for residential, office, and special purpose buildings. Services range from technical house services (small repairs) to complete turnkey residential complexes. Also includes renovation and modernization projects.
4. Technical Property Services: Technical house services (technisches Hausservice) providing maintenance and minor construction services for property administrators, commercial and industrial clients, and institutional clients. Includes inspection services via IMMOSCAN.
5. Planning Services: Integral planning services as general or total contractor, covering the entire project lifecycle. Includes ESG-compliant building planning, BIM-based design, and building certification support.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Sedlak Bau & Immobilien is an Austrian construction and real estate group delivering an integrated value chain: general construction (Bauen), renovation and maintenance (Instandhaltung & Sanierung), BIM-based planning (Planung), and technical facility management (Technisches Hausservice) under its core Sedlak division, complemented by the Sedlak Immobilien subsidiary which develops, markets, and operates residential and commercial real estate projects, and by SCALE, which provides consulting for sustainable construction. Proprietary digital tools including BIM, a digital building twin, and the IMMOSCAN inspection software underpin planning, execution, and operations.

Product overview

Sedlak Bau & Immobilien operates as an integrated construction and real estate development company with two core divisions: the construction business (DI Wilhelm Sedlak GmbH) and the real estate developer (Sedlak Immobilien GmbH). The construction division offers four main service pillars: Bauen (construction for residential, commercial, and special projects), Instandhaltung & Sanierung (maintenance and renovation), Planung (integral planning with BIM), and Technisches Hausservice (technical house services). The real estate division develops and sells/rents residential properties under the Sedlak Immobilien brand, featuring its proprietary Greenline sustainability approach. Supporting services include Immoscan (property inspection software), SCALE (circular economy consulting as co-shareholder), and various branded residential projects across Vienna and Lower Austria including EDMUND, LIST83, KLEEGARTEN, and NOA 22. The company emphasizes integrated project delivery where the developer and builder work together from planning through handover.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• 80 years of successful business operations and 80th anniversary celebration
• +2 more outcomes

Named customers7 records

Segments4 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

Five partnerships are on record, tiered core and minor.

• SCALE GmbHcoreStrategic or Co-development Partner · 1 July 2023Sedlak is co-shareholder (since July 2023) of SCALE GmbH, a company providing consulting and innovative solutions for sustainable planning, construction, and renovation of buildings. SCALE supports circular economy projects and EU taxonomy compliance. SCALE advises on the VDN22 circular renovation pilot project.
• Smart Construction Austria (SCA)coreStrategic or Co-development Partner · 1 January 2019Alliance of 6 innovative Austrian construction companies founded in 2019 to advance digitalization and foster innovation in construction. Members: Hillebrand Bau GmbH (Salzburg), Handler Holding GmbH (Lower Austria), Tomaselli Gabriel Bau GmbH (Vorarlberg), Dipl.-Ing. Wilhelm Sedlak GmbH (Vienna), Wimberger Bau GesmbH (Upper Austria), RIEDERBAU GmbH (Tyrol).
• Digital Findet StadtcoreStrategic or Co-development PartnerFFG-funded innovation lab for digital transformation in construction, founded by IG Lebenszyklus Bau and Austrian Institute of Technology, with partners including Verband der Ziviltechniker, Smart Construction Austria, and Facility Management Austria. Sedlak participates in developing digital building passports and circular economy standards.
• Urban MatterminorStrategic or Co-development PartnerSalzburg-based startup for window glass reuse in construction. Urban Matter collects removed windows from renovation projects, processes them in Salzburg, and provides reclaimed glass for new window production.
• WieNeu+minorOthersVienna urban renewal initiative that funded the initial circular renovation concept study for the VDN22 project developed with Digital Findet Stadt.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Leyrer + Graf Baugesellschaft m.b.H. Lower Austrian family-owned general contractor of similar mid-market scale; comparable across residential construction, commercial projects, and regional Austrian execution model.
• Wimberger Bau GesmbH: Upper Austrian general contractor and SCA alliance co-founding member. Comparable mid-sized regional builder with similar service breadth across residential, commercial, and renovation work.
• Handler Holding GmbH: Lower Austrian general contractor and SCA alliance co-founder. Comparable regional builder operating in neighbouring geography to Sedlak with similar mid-market positioning.
• Tomaselli Gabriel Bau GmbH: Vorarlberg-based builder and SCA alliance co-founder. Comparable mid-sized Austrian contractor with similar residential and commercial project mix.
• Hillebrand Bau GmbH: Salzburg-based general contractor and Smart Construction Austria co-founding member. Closely comparable mid-sized Austrian builder with similar residential/commercial mix, BIM adoption, and sustainability positioning.
• RIEDERBAU GmbH: Tyrolean builder and SCA alliance co-founder. Comparable regional Austrian general contractor with integrated planning/construction offering and similar project scale.

Broad incumbents

• STRABAG SE: Largest Austrian-headquartered construction group with global operations across building, civil, and infrastructure. Overlaps Sedlak on Austrian building construction but at vastly larger scale, with publicly listed equity and international diversification.
• Habau Group: Larger Upper-Austrian construction group with residential, commercial, civil engineering, and infrastructure operations. Overlaps Sedlak in residential and commercial building but operates at significantly larger scale and broader geography.

Regional players

• CA Immobilien Anlagen AG: Vienna-listed real estate developer/investor focused on office and mixed-use properties in Austria, Germany, and CEE. Comparable Austrian real estate development activity but at much larger, publicly-listed scale.
• S IMMO AG: Vienna-listed real estate investment company active in Austrian and CEE office, retail, and hotel assets. Comparable Austrian real estate exposure but operates as investor/asset manager rather than builder-developer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sedlak-bau-immobilien

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries2 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 Sedlak Bau & Immobilien