OTTO QUAST
OTTO QUAST is a German family-owned Mittelstand construction group offering turnkey construction, structural and civil engineering, specialist pile foundations, in-house precast concrete manufacturing, and concrete renovation for industrial, commercial, public-sector, and residential clients across Germany and Poland.
- Company typePrivate
- Founded1940
- HeadquartersSiegen, Germany
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What OTTO QUAST does
OTTO QUAST is a German family-owned Mittelstand construction group headquartered in Siegen, North Rhine-Westphalia, founded in 1940 and led by CEO Sebastian Quast. It operates through a vertically integrated network of wholly-owned subsidiaries covering turnkey construction (Schlüsselfertigbau), structural and civil engineering (Hoch- und Tiefbau), specialist deep foundations using proprietary QUAST-VVB and QUASTduktil pile systems, drinking water reservoir construction and renovation, concrete renovation (Betonsanierung), and architectural planning (Konzeption). The group runs in-house precast concrete production at two factories in Freudenberg (NRW) and Coswig (Saxony), supplying both internal projects and third parties, and markets a sustainability-positioned sub-brand called ECOELEMENT for green precast elements.
The company's technology base combines traditional German craftsmanship with digital construction planning, including 3D design using Nemetschek Allplan, and capital-intensive specialised equipment such as large crawler cranes (70m span), pile drilling rigs (Bohrgerät), and tilting tables (Kipptische) for precast production. Notable completed projects include the IKEA Wetzlar furniture store (18,000 m² with 50 km of underfloor heating), a TRUMPF production hall extension with high-specification visual concrete, the 460-metre Krombacher Welle noise barrier (2,200 tonnes of patterned concrete), the FC Bayern München training centre, and multiple schools, hospitals, and university lecture halls.
Commercially, OTTO QUAST pursues a direct B2B sales-led model, winning work through tenders, repeat clients, and referrals across industrial, commercial, public-sector, and residential segments in NRW and Saxony, with additional activity in Poland and Switzerland. Revenue is generated entirely from project-based contracts (one-time) plus precast hardware sales, with pricing determined per-tender and not publicly disclosed. The group employs over 600 people across four German sites (Siegen, Freudenberg, Radeburg, Coswig) and one Polish location, supported by an unusually active apprenticeship and dual-study pipeline that has produced multiple IHK chamber and state-level award winners.
OTTO QUAST firmographics
Firmographics- Name
- OTTO QUAST
- Legal name
- OTTO QUAST Bau AG
- Website
- https://quast.de
- Company type
- Private
- Founded year
- 1940
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- OTTO QUAST is a German family-owned Mittelstand construction group offering turnkey construction, structural and civil engineering, specialist pile foundations, in-house precast concrete manufacturing, and concrete renovation for industrial, commercial, public-sector, and residential clients across Germany and Poland.
- Ownership category
- akta.pro rank
OTTO QUAST industry classification
Industry- Product category
- General Contracting and Construction Services
- NAICS
- Commercial and Institutional Building Construction (236220), Cement and Concrete Product Manufacturing (3273), Poured Concrete Foundation and Structure Contractors (23811)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540), Concrete, Gypsum & Plaster Products (3270), Heavy Construction Other Than Bldg Const - Contractors (1600)
- akta.pro primary industry
- Concrete Masonry Units (CMU) & Segmental Concrete Products (IMADAAAC)
- akta.pro secondary industry
- Parking Structures & Garages Construction (IMAFACAK)
Keywords
Where OTTO QUAST is headquartered
LocationHeadquarters
- HQ city
- Siegen
- HQ country
- Germany
- HQ region
- Europe
Offices5 records
Markets served
OTTO QUAST business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- General Construction Services (Schlüsselfertigbau, Hochbau, Tiefbau): One-time project-based revenue from design-build (turnkey), high-rise, civil engineering, and road construction services for industrial, commercial, and public sector clients.
- Specialized Construction Services (Pfahlgründung, Trinkwasserbehälter, Betonsanierung): Specialist niche services including pile foundations, drinking water tank construction and renovation, and concrete repair/installation works. May be billed as discrete projects or retained as ongoing service contracts.
- Precast Concrete Elements (Betonfertigteile): In-house manufacturing and supply of precast concrete elements (walls, columns, slabs, sandwich facades) to construction projects. Elements are produced at dedicated factory sites and supplied to both internal projects and external customers.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
OTTO QUAST product offering
Product offeringCore offering
OTTO QUAST fundamentally delivers general contracting and specialist construction services for industrial, commercial, and public sector clients across North Rhine-Westphalia, Saxony, and Poland. Its core offerings cover turnkey construction (Schlüsselfertigbau), structural and civil engineering (Hoch- und Tiefbau), and in-house manufactured precast concrete elements (walls, columns, slabs, sandwich facades). Specialised disciplines include proprietary deep pile foundations (QUAST-VVB, QUASTduktil), drinking water reservoir construction and renovation, and concrete repair, supported by architectural planning and 3D design capabilities.
Product overview
OTTO QUAST is a medium-sized construction company offering a comprehensive portfolio of construction services and products. The core offering centers on turnkey construction (Schlüsselfertigbau), structural and civil engineering (Hoch- und Tiefbau), and specialized services including pile foundations (Pfahlgründung) using proprietary QUAST-VVB and QUASTduktil systems, drinking water tank construction, and concrete renovation. The company operates prefabricated concrete element production facilities producing custom components including walls, columns, beams, floor slabs, and sandwich facades, with the ECOELEMENT sub-brand representing eco-friendly concrete products. Planning services include 3D architectural design using Nemetschek Allplan software. With over 600 employees across four German locations (NRW and Saxony) and one in Poland, the company serves industrial, commercial, and residential construction projects of various scales.
Differentiator
Problem solved
Functional benefit
Products and services
- Schlüsselfertigbau (Turnkey Construction) Complete turnkey construction services for industrial, commercial, and residential projects, handling all phases from planning to handover for clients such as enterprises, public sector institutions, and developers.
- Hoch- und Tiefbau (Structural and Civil Engineering) Structural engineering and civil construction services covering building construction (Hochbau), road construction, and infrastructure projects for industrial, commercial, and public sector clients.
- Pfahlgründung (Pile Foundation) Specialized deep foundation services using proprietary QUAST-VVB (Vollverdrängerbohrpfahl) and QUASTduktil systems for projects with challenging ground conditions, including partial-displacement bored piles and full displacement systems.
- Trinkwasserbehälter (Drinking Water Tanks) Construction and renovation of drinking water storage facilities, including reservoirs and elevated tanks, for water utilities and public sector clients with strict hygiene requirements.
- Betonfertigteile (Prefabricated Concrete Elements) Industrial production of custom prefabricated concrete components, including walls, columns, beams, floor slabs, and sandwich facades, manufactured at in-house plants and supplied to construction projects and external customers.
- Betonsanierung (Concrete Renovation) Repair and restoration services for concrete structures, including coating, injection work, sandblasting, and surface treatment for industrial, infrastructure, and building clients.
- Konzeption (Planning and Design) Project development and architectural planning services, including 3D design and technical planning using Nemetschek Allplan, delivered through BauPlus GmbH and project teams.
- Bauen im Bestand (Construction in Existing Buildings) Renovation and expansion services for existing structures, including demolition, structural modifications, and integration with new construction for building owners and public clients.
- ECOELEMENT (Green Precast Concrete) Green prefabricated concrete elements marketed as eco-friendly building components for sustainable construction projects, produced by the in-house precast facilities.
Companies that use OTTO QUAST
Customer profileNamed customers10 records
Segments4 records
Ideal customer profiles3 records
OTTO QUAST technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
OTTO QUAST partnerships and signals
Strategic signalScale indicators6 records
Recent moves5 records
Expansion highlights4 records
OTTO QUAST competitors and assessment
Company assessmentDirect peers
- KLEBL GmbH: German precast concrete manufacturer and construction services provider with multiple factory locations. Direct comparable in the precast concrete segment.
- Leonhard Weiss: Family-owned German construction group offering turnkey construction, civil engineering, and specialised services. Closely comparable family-Mittelstand model and multi-service structure.
- Max Bögl: Major German construction group with significant in-house precast concrete production, civil engineering, and turnkey capabilities. Comparable scale and vertical integration approach.
- GOLDBECK GmbH: German turnkey construction company with in-house precast concrete element production serving industrial and commercial clients. Closely comparable vertically integrated business model and Mittelstand positioning.
- Ed. Züblin AG: Large German construction company (part of Strabag) offering turnkey construction, civil engineering, and precast concrete. Directly comparable services but at significantly larger scale.
- Wolff & Müller: Family-owned German construction company with turnkey, civil engineering, and concrete repair capabilities. Comparable private family-owned Mittelstand positioning.
- Köster GmbH: German turnkey construction company specialising in commercial, industrial, and public buildings. Similar Mittelstand positioning and project-based service portfolio.
Broad incumbents
- Zech Group: Broader German construction and real estate group with overlapping capabilities in turnkey construction, but operating at significantly larger scale with a wider portfolio.
- Hochtief AG: One of the largest German construction companies with major international presence. Competes for the largest national and international tenders that OTTO QUAST cannot bid on.
- Bilfinger: Major German engineering and industrial construction services provider with overlapping capabilities but broader industrial focus and significantly larger scale.
Market position
Strengths1 record
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
OTTO QUAST social profiles
Digital presenceOTTO QUAST financial estimates
Financial estimateRevenue estimate
Valuation estimate
OTTO QUAST leadership team
Management profileNumber of profiles
Profiles1 record
OTTO QUAST subsidiaries and ownership
Company hierarchySubsidiaries6 records
OTTO QUAST funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
OTTO QUAST 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 OTTO QUAST
What does OTTO QUAST do?
OTTO QUAST fundamentally delivers general contracting and specialist construction services for industrial, commercial, and public sector clients across North Rhine-Westphalia, Saxony, and Poland. Its core offerings cover turnkey construction (Schlüsselfertigbau), structural and civil engineering (Hoch- und Tiefbau), and in-house manufactured precast concrete elements (walls, columns, slabs, sandwich facades). Specialised disciplines include proprietary deep pile foundations (QUAST-VVB, QUASTduktil), drinking water reservoir construction and renovation, and concrete repair, supported by architectural planning and 3D design capabilities.
Is OTTO QUAST a public or private company?
OTTO QUAST is a private company. It is classified as family owned and is currently operating.
When was OTTO QUAST founded?
OTTO QUAST was founded in 1940. It employs 501 to 1,000 people.
Where is OTTO QUAST based?
OTTO QUAST is headquartered in Siegen, Germany, in the Europe region.
How does OTTO QUAST make money?
Three revenue lines are on record. General Construction Services (Schlüsselfertigbau, Hochbau, Tiefbau) is the primary driver. The others are specialized Construction Services (Pfahlgründung, Trinkwasserbehälter, Betonsanierung) and precast Concrete Elements (Betonfertigteile).
Who are OTTO QUAST's main competitors?
Direct peers on record are KLEBL GmbH, Leonhard Weiss, Max Bögl, GOLDBECK GmbH, Ed. Züblin AG, Wolff & Müller and Köster GmbH. Broad incumbents are Zech Group, Hochtief AG and Bilfinger.
Does OTTO QUAST have an API?
No public API is recorded for OTTO QUAST.
What industry is OTTO QUAST in?
OTTO QUAST's product category is General Contracting and Construction Services. Its primary akta.pro industry code is IMADAAAC, Concrete Masonry Units (CMU) & Segmental Concrete Products, with a secondary code of IMAFACAK, Parking Structures & Garages Construction. Its NAICS code is 236220 and its SIC code is 1540.