Cassens

What Cassens does

Cassens (legal entity Cassens Cassens GmbH, DBA Cassens Bau) is a privately held, family-owned German construction company headquartered in Hollenstedt, Lower Saxony, that was founded in 1974 by Cassen Cassens and has been led since 1995 by Rainer Cassens in its second generation of family ownership. The firm operates as a regional turnkey construction provider (schlüsselfertiges Bauen) serving both private individuals and commercial/industrial clients within the Hollenstedt area and the broader Lower Saxony region of Germany, with no global footprint and no resellers or distribution partners.

The company's core product set is divided into three lines: (1) Private Hausbau, encompassing single-family homes (Einfamilienhaus), semi-detached houses (Doppelhaus), and multi-family buildings (Mehrfamilienhaus); (2) Gewerblicher Bau, covering industrial halls (Hallenbau), office buildings, and residential complexes (Wohnanlagen); and (3) Sanierung & Renovierungen, including energy-efficient modernization, basement waterproofing, facade and window renovation, tile work, and historic restoration, with the latter supported by KfW low-interest financing. Underlying technology is traditional construction — masonry, reinforced concrete, and finishing trades — delivered through an in-house team of over 20 staff covering bricklayers, reinforced concrete workers, tilers, building technicians, and one architect, with no proprietary technology, software products, or AI/ML capabilities disclosed.

The business model is project-based professional services, with each engagement individually scoped and quote-priced, multi-year contracts, and no standardized pricing tiers. Go-to-market is sales-led and relationship-driven, relying on direct personal consultation from first meeting through key handover, a company website, and word-of-mouth / referral, with no paid acquisition, no channel partners, and no public revenue disclosure. Customer segments are hybrid, split between individual residential buyers (for whom home construction is typically a once-in-a-lifetime investment) and commercial/industrial clients requiring flexible, resilient, and economical turnkey construction.

Name

Cassens

Legal name

Cassens Cassens GmbH

Website

https://cassensbau.de

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

11–50 employees

Short description

Cassens is a family-owned German turnkey construction company based in Hollenstedt, Lower Saxony, serving private residential and commercial/industrial clients in the region. It delivers single-family and multi-family homes, commercial halls and offices, and renovation projects through an in-house team of 20+ tradespeople.

Ownership category

akta.pro rank

Product category

Construction Services

NAICS

New Single-Family Housing Construction (except For-Sale Builders) (236115), Residential Building Construction (2361)

SIC

Operative Builders (1531)

akta.pro primary industry

Single-Family Home Construction (Detached Homes) (IMAFABAA)

akta.pro secondary industries

Multi-Family Residential Construction (Apartments, Condos, Townhomes) (IMAFABAB), Sustainable/Green Building & LEED Consulting (BPAHAKAG)

Keywords

• Residential construction services
• Commercial building construction
• Turnkey construction services
• Building renovation services
• Energy-efficient modernization

Headquarters

HQ city

Hollenstedt

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Construction Services: Project-based revenue from construction services including residential buildings (single-family, duplex, multi-family), commercial buildings (halls, office buildings, residential complexes), renovation and modernization work, and turnkey construction. All services are one-time/project-based with professional planning and execution services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Cassens is a family-owned construction company in Hollenstedt, Germany, providing turnkey building solutions from earthworks and demolition through structural construction, building technology, and exterior paving. The company builds single-family homes, duplex and multi-family houses for private clients, and constructs commercial halls, office buildings, and residential complexes for business clients, alongside renovation, restoration, and energy-efficient modernization services supported by an in-house team of masons, reinforced concrete workers, tilers, building technicians, and an architect.

Product overview

Cassens is a traditional construction company offering turnkey building solutions (schlüsselfertiges Bauen) primarily in the residential and commercial construction sectors. The portfolio consists of three core offerings: Private Hausbau (single-family, semi-detached, and multi-family homes), Gewerblicher Bau (commercial construction including industrial halls, office buildings, and residential complexes), and Sanierung & Renovierungen (renovation, restoration, and energy-efficient modernization services). All services are delivered as a single-source turnkey solution, with the company handling everything from earthworks and demolition through structural construction, building technology installation, and exterior paving. The company employs over 20 staff including masons, reinforced concrete workers, tilers, building technicians, and an architect.

Differentiator

Problem solved

Functional benefit

Products and services

• Private Residential Construction (Privater Hausbau) Construction of single-family homes (Einfamilienhaus), semi-detached houses (Doppelhaus), and multi-family buildings (Mehrfamilienhaus) customized to customer specifications, covering the full scope from planning and construction management through interior finishing, including extensions and conversions of existing homes.
• Commercial Construction (Gewerblicher Bau) Full-service commercial construction of industrial halls (Hallenbau), office buildings (Bürogebäude), and residential complexes (Wohnanlagen) in steel, wood, or concrete, delivered as turnkey solutions from initial planning through construction and exterior paving (Pflasterarbeiten) of outdoor facilities.
• Renovation & Restoration (Sanierung & Renovierungen)
• Turnkey Construction (Schlüsselfertiges Bauen) Comprehensive single-source turnkey construction covering all phases from earthworks, demolition, and site clearing through structural construction including building technology (Haustechnik), interior finishing, tiling, and exterior paving, with one personal contact person assigned to the customer from initial consultation through key handover.

Quantifiable outcome

• Energy savings through energetic renovation measures including cellar excavation with waterproofing and perimeter insulation, exterior wall cladding with core insulation, window replacement, and alternative interior wall insulation

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators3 records

Recent moves5 records

Expansion highlights2 records

Broad incumbents

• Town & Country Haus: Germany's largest franchise homebuilder network offering turnkey single-family homes nationwide. Comparable customer segment and turnkey value proposition, though delivered through a decentralized partner/franchise model rather than in-house crews.
• Helma Eigenheimbau AG: German listed homebuilder specializing in turnkey single-family, multi-family and vacation homes. Overlaps with Cassens on residential turnkey delivery and energy-efficient construction but at materially larger scale.
• Fingerhaus: German prefab homebuilder producing turnkey single-family homes. Comparable customer value proposition (customized turnkey homes) but industrialized prefab construction rather than traditional masonry methods used by Cassens.
• Bien-Zenker: Long-established German prefab homebuilder offering turnkey single-family houses. Comparable in customer profile (private individuals seeking turnkey homes) but with prefabricated construction methods and national reach.
• SchwörerHaus: Established German prefab and turnkey homebuilder with a national footprint. Comparable in core offering (single-family turnkey construction) but operates at significantly larger scale and with industrialized methods.
• DFH Haus: German prefab homebuilder group (Deutsche Fertighaus) offering turnkey residential homes through multiple regional brands. Comparable in customer targeting and turnkey delivery model; competes for the same private Hausbau customer.
• Heinz von Heiden GmbH Massivhäuser: One of Germany's largest mass-construction homebuilders, focused on turnkey single-family and multi-family homes. Comparable product offering to Cassens but operates nationally and at much greater scale.
• Streif Haus: German turnkey residential homebuilder with both prefab and traditional construction capabilities. Overlaps with Cassens in single-family and multi-family turnkey delivery, though at greater scale and broader geographic reach.

Regional players

• Viebrockhaus: Northern German family-owned homebuilder (Lower Saxony) offering turnkey single-family and multi-family homes. Same regional geography and customer profile as Cassens, with a similar full-service turnkey model and family stewardship.

Direct peers

• Otto Wulff Bauunternehmung: Northern German general contractor offering turnkey construction across residential, commercial, and renovation segments. Strongest direct overlap with Cassens on combined residential/commercial/renovation turnkey delivery in Northern Germany.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/cassens-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Cassens