What ZENKER does

Zenker (legal name Zenker Hartmut, also traded as Zenker Baugeschäft Rehau and ZENKER Hoch- und Tiefbau) is a sole-proprietorship German construction company founded on September 14, 2010 by Hartmut Zenker. The company is headquartered at Fohrenreuther Str. 19, 95111 Rehau, Bavaria, Germany, with a secondary operational yard at Wachtalweg established in 2020. It specializes in two core areas: civil engineering (Tiefbau) covering paving (Pflasterarbeiten), sewer/canal construction (Kanalbau), asphalt work (Asphaltarbeiten), and earthworks (Erdbau); and old building renovation (Altbausanierung) covering bathroom renovation, window/door installation, electrical work, staircase renovation, and damp-proofing/building exposure services.

The company serves three primary customer segments: private households (defective wastewater systems, damp basements, deteriorating driveways, outdated terraces), commercial buildings and businesses (damaged infrastructure, parking areas, access roads), and the public sector (communal road maintenance, canal renovation, asphalt rehabilitation). Named engagements include municipal work for Betriebsbauhof Selb and a hotel parking lot construction in Rehau. The technical approach relies on standard construction equipment — excavators, machinery, and fleet vehicles — with no proprietary technology, software products, or digital platforms disclosed.

Zenker operates with approximately 9 employees, is bootstrapped with no external investment, and confines its geographic reach to the Rehau region and surrounding area within Germany. Its go-to-market is direct customer contact via phone, mobile, email, and the company website (zenker-baut.de), with projects won through word-of-mouth referrals and municipal relationships rather than through formal marketing channels or intermediaries. Pricing is quote-based and not publicly disclosed, with project costs dependent on scope, materials, and requirements. Hartmut Zenker serves as sole Geschäftsführer (Managing Director) and remains active in field operations.

Name

ZENKER

Legal name

Zenker Hartmut

Website

https://zenker-baut.de

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

1–10 employees

Short description

Zenker is a sole-proprietorship German construction company founded in 2010 in Rehau, Bavaria, specializing in civil engineering (paving, canal, asphalt, earthworks) and old building renovation. With 9 employees, it serves private households, commercial clients, and the public sector exclusively in the Rehau region.

Ownership category

akta.pro rank

Product category

Construction Services

NAICS

Nonresidential Building Construction (2362), Other Heavy and Civil Engineering Construction (237990)

SIC

Construction - Special Trade Contractors (1700), General Bldg Contractors - Nonresidential Bldgs (1540), General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Landscape Construction Project Management & General Contracting (HSAIABAK)

akta.pro secondary industry

Grounds, Landscaping & Exterior Services (BPABAAAD)

Keywords

• Civil engineering services
• Building renovation services
• Sewer construction services
• Asphalt paving services
• Earthworks construction

Headquarters

HQ city

Rehau

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Distribution channels1 record

Marketing channels1 record

Core offering

Zenker is a construction company (Baugeschäft) offering a comprehensive range of civil engineering services (Tiefbau) including paving work (Pflasterarbeiten), sewer/canal construction (Kanalbau), asphalt work (Asphaltarbeiten), and earthworks (Erdbau), as well as old building renovation (Altbausanierung) covering house exposure for damp buildings, basement drying, bathroom renovation, window/door installation, electrical work, and staircase renovation. The company delivers complete project planning, design consultation, and material selection assistance for private households, commercial buildings, and public sector clients in the Rehau region.

Product overview

Zenker is a construction company (Baugeschäft) specializing in civil engineering (Tiefbau) and building renovation (Altbausanierung). The company offers a comprehensive range of construction services including paving work (Pflasterarbeiten) for terraces, paths, and driveways; sewer/canal construction (Kanalbau) for new builds and renovations; asphalt work (Asphaltarbeiten); earthworks (Erdbau); and full building renovation services including building exposure for damp proofing, bathroom renovations, window/door installation, electrical work, and tiling. The company serves private households, commercial buildings, and public sector clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Pflasterarbeiten (Paving/Flagstone Work) Paving and flagstone work for terraces, paths, and driveways, including planning, design, and selection of appropriate paving materials. Targeted at private households, commercial buildings, and public sector clients.
• Kanalbau (Sewer/Canal Construction) New construction and professional renovation of defective wastewater systems for private households, commercial buildings, and public contracts.
• Asphaltarbeiten (Asphalt Work) Asphalt paving for yards and garage entrances, as well as asphalt renovation and restoration services.
• Erdbau (Earthworks) Earthworks including large-scale earth movements, garden redesign, excavation, excavator work, and grading operations.
• Altbausanierung (Building Renovation) Building renovation including house exposure for old damp buildings, basement drying solutions, bathroom renovation, window and door installation, electrical work, and staircase renovation.
• Hausfreilegung/Trockenlegung (Building Exposure/Damp Proofing) Building exposure services for old damp buildings with necessary measures to achieve a dry basement.
• Kommunaler Straßenunterhalt (Municipal Road Maintenance) Municipal road maintenance services including deck rehabilitation and surface repairs, targeted at municipal government clients.

Named customers2 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

Scale indicators1 record

Recent moves4 records

Expansion highlights2 records

Broad incumbents

• PORR AG: Austrian-headquartered European construction company with significant German operations covering Tiefbau, building construction, and infrastructure. Comparable industry vertical but at enterprise scale well above Zenker.
• HOCHTIEF AG: One of Germany's largest construction companies, active in building construction, civil engineering, and infrastructure. Represents the broad incumbent end of the same industry Zenker operates in, providing large-scale competitive context.
• Zech Group: Established German construction group with operations across building construction, civil engineering, and infrastructure. Functions as a broad incumbent in the same space Zenker operates in, but at much larger scale and broader geographic footprint.

Direct peers

• Klebl GmbH: German family-owned construction company specializing in concrete, foundations, and civil engineering. Operates in adjacent specialty trade contractor categories to Zenker's foundation, paving, and earthworks services.
• Pichler Bau GmbH: German construction company focused on civil engineering and building trades including paving, asphalt, and earthworks. Directly comparable in core service offerings to Zenker's specialty trade portfolio.
• Leonhard Weiss: Major German construction company offering Tiefbau, road construction, and building renovation services. While much larger than Zenker, it operates in overlapping civil engineering and building trades across Germany, making it a comparable reference for service mix.
• Matthäi Bauunternehmen: German construction group with regional offices active in Tiefbau, road construction, asphalt, and civil engineering. Directly comparable in service offering mix to Zenker, with similar regional German operating model.
• Glöckle Holding: Mid-sized German construction company covering building construction, civil engineering, and renovation. Comparable in vertical integration across trades to Zenker, though at significantly larger scale.
• Köster GmbH: German construction company offering turnkey building and civil engineering services. Comparable in full-service project delivery approach and broad trade coverage to Zenker's Tiefbau and Altbausanierung model.
• Heberger Bau GmbH: German mid-sized construction company offering Tiefbau, road construction, and building services. Closely comparable in service mix and operating model to Zenker as a multi-trade German construction contractor.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/zenker

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 ZENKER