HU-Holzunion GmbH

What HU-Holzunion GmbH does

HU-Holzunion GmbH is a privately held German timber and timber-hybrid construction company organized as a consortium of five established medium-sized Holzbau firms (Taglieber Holzbau, Cordes, Hoffmeister, Kaiser, and Adams Holzbau-Fertigbau), founded at the end of 2013 with operations beginning in March 2014 from its headquarters in Rotenburg (Wümme). The firm coordinates multi-story timber construction (Holzrahmenbau), cross-laminated timber (Brettsperrholz/CLT) and timber-hybrid construction for housing companies, cooperatives, municipal developers, and government clients across Germany, delivered through three regional offices and a network of production facilities.

The company operates through four core service lines: Holzunion System Q (a proprietary serial modular construction concept for multi-story residential buildings using a fixed stairwell core and variable apartment matrix), multi-story timber and timber-hybrid engineering construction (up to 12 stories including the Woodscraper Wolfsburg reference project), turnkey construction (Schlüsselfertiger Objektbau) from planning to handover, and serial renovation/upward extension (Serielles Sanieren/Aufstocken) aligned with the Energiesprong initiative. Core technology centers on industrial prefabrication of timber frame walls, facades, and structural elements in the consortium's own production halls, enabling millimeter-precise, weather-independent factory output and claimed project delivery 118% faster than conventional construction.

The revenue model is project-based general contracting with individually negotiated contract values ranging from approximately €0.2M for facade projects to €9.0M for turnkey residential builds (Corellistraße Düsseldorf €8.0M, Jakob-Kneip-Straße €6.3M, Lynarstraße Berlin). Go-to-market combines enterprise field sales with strong channel partnerships: repeat engagements with housing developers (B&O Bau und Projekte, Rheinwohnungsbau, Fischbach Group, Wohnungsbaugenossenschaft Am Ostseeplatz), public-sector work (Senatsverwaltung Berlin kindergartens, Niedersächsische Landesforsten office building), and supplier partnerships with Stora Enso, Kneer-Süd Fenster, Hasslacher, Warema, Knauf, and SIGA. The group's annual turnover is reported as €150M across the five shareholder companies; HU-Holzunion GmbH itself is owned by six shareholders, three of whom (Heiko Seen, Ulf Cordes, Erwin Taglieber) serve as Managing Partners, with no PE or VC involvement disclosed.

Name

HU-Holzunion GmbH

Legal name

HU-Holzunion GmbH

Website

https://holzunion.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

1–10 employees

Short description

HU-Holzunion GmbH is a German consortium of five mid-sized timber construction companies delivering multi-story timber and timber-hybrid construction, turnkey building, and serial renovation for housing companies, cooperatives, and public-sector clients across Germany, anchored by its proprietary System Q modular system.

Ownership category

akta.pro rank

Product category

Timber and Hybrid Construction Services

NAICS

New Multifamily Housing Construction (except For-Sale Builders) (236116), New Single-Family Housing Construction (except For-Sale Builders) (236115)

SIC

Prefabricated Wood Bldgs & Components (2452), Construction - Special Trade Contractors (1700), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

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

akta.pro secondary industry

Mass Timber & Structural Engineered Wood (CLT, Glulam, NLT/DLT) (IMADADAC)

Keywords

• Timber construction
• Modular building systems
• Serial renovation
• Prefab construction
• Multi-story timber

Headquarters

HQ city

Rotenburg (Wümme)

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. General contractor services (GU-Leistung): Full general contractor services including planning, fabrication, and turnkey delivery for construction projects.
2. Closed building envelope (Geschlossene Gebäudehülle): Supply and installation of complete building envelopes including timber frame walls, facades, and structural elements.
3. Serial renovation/upgrading (Serielles Sanieren): Energy-efficient renovation of existing buildings using prefabricated facade and roof elements, reducing energy consumption significantly.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

HU-Holzunion GmbH is a consortium of five timber construction companies providing full-service timber and timber-hybrid construction across Germany. The company delivers four core services: (1) the proprietary Holzunion System Q serial modular construction for multi-story residential buildings, (2) multi-story timber and timber-hybrid engineering and construction, (3) turnkey construction (Schlüsselfertiger Objektbau) from planning through handover, and (4) serial renovation and upward extension (Serielles Sanieren/Aufstocken) of existing buildings. Operations span industrial prefabrication of timber frame elements, facades, and building envelopes through complete project delivery for housing companies, cooperatives, and government clients.

Product overview

HU-Holzunion GmbH is a full-service provider in timber and timber-hybrid construction, operating as a consortium of five established timber construction companies. The company offers a unified portfolio consisting of four core service lines: Holzunion System Q (a modular, serial construction system for multi-story residential buildings with fixed stairwell cores), Mehrgeschossiger Holz- und Holzhybridbau (multi-story timber engineering and hybrid construction), Schlüsselfertiger Objektbau (turnkey construction from planning to handover), and Serielles Sanieren/Aufstocken (serial renovation and building upward extension). Together these services cover the full lifecycle from urban densification and new construction through renovation and modernization, delivered through centralized coordination with regional production facilities across Germany.

Differentiator

Problem solved

Functional benefit

Brands

• Holzunion SYSTEM Q: Serial modular timber construction concept for multi-story residential buildings using a standardized point house building cubature with stairwell core, fixed shaft system and apartment matrix.

Products and services

• Holzunion System Q A serial, modular timber construction system for multi-story residential buildings using a fixed stairwell core, shaft system, and apartment matrix for flexible building concepts. Delivers 100% cost and schedule certainty combined with high energy efficiency standards in an ecologically sustainable timber building system, with projects realized over 118% faster than conventional construction.
• Mehrgeschossiger Holz- und Holzhybridbau (Multi-Story Timber and Timber-Hybrid Construction) Multi-story engineering timber and timber-hybrid construction services combining architectural freedom with high prefabrication rates for efficient processes, precise execution, and maximum design flexibility using engineered timber structures, including cross-laminated timber (CLT) and timber-hybrid construction with concrete cores for buildings up to 12 stories.
• Schlüsselfertiger Objektbau (Turnkey Construction) Turnkey construction services delivering all services from a single source including planning, fabrication, and handover. Offers holistic project management integrating architecture, construction, materials, and processes from the earliest stages, including general contractor (GU) services for housing companies, government entities, and commercial clients.
• Serielles Sanieren / Aufstocken (Serial Renovation and Upward Extension) Serial renovation and upward extension services transforming existing buildings into climate-neutral showcase projects using industrially prefabricated facade and roof elements, integrated building services modules, and digital planning processes for fast, economical, and precise renovation work. Achieves Efficiency House 55 standard through Energiesprong-compatible processes.

Quantifiable outcome

• Construction time reduced by over 118% compared to conventional multi-story residential construction
• +2 more outcomes

Named customers6 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

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Stora EnsocoreTechnology or IntegrationStora Enso is a key supplier of timber construction materials and a strategic partner for the Woodscraper Wolfsburg project and other major constructions. They are referenced as a reliable partner ensuring smooth construction processes.
• Kneer-Süd FenstercoreTechnology or IntegrationWindow manufacturer supplying high-quality timber windows for facade construction in HOLZUNION projects, featured as a key partner in the Woodscraper Wolfsburg project.
• HasslachercoreTechnology or IntegrationTimber construction partner referenced in the Woodscraper Wolfsburg project, supplying timber elements for the modular construction.
• Energiesprong DEcoreStrategic or Co-development PartnerDutch-origin initiative for serial renovation that HOLZUNION participates in. Partnership enables CO2-neutral renovation of existing buildings through prefabricated facade elements. HOLZUNION showcased projects at Energiesprong Convention 2025 in Berlin.
• GLS BankminorStrategic or Co-development PartnerSustainable banking partner involved in financing the Woodscraper Wolfsburg project, aligned with the ecological construction approach.

Scale indicators5 records

Recent moves9 records

Expansion highlights6 records

Regional players

• HUF Haus GmbH & Co. KG: German prefab timber/modular home builder with strong brand presence. While primarily focused on single-family and luxury prefab homes, it shares industrial prefabrication DNA with HOLZUNION's timber factory model.

Broad incumbents

• KLEUSBERG GmbH & Co. KG: Larger German modular construction firm offering serial timber and steel-hybrid building systems. Wider portfolio than HOLZUNION but competes in modular multi-story and public-sector construction.
• Binderholz GmbH: Austrian integrated timber group producing CLT, glulam, and BBS, with own construction division. Comparable on engineered timber supply and turnkey timber project execution across the DACH region.

Direct peers

• WIEHAG GmbH: Austrian engineering timber specialist delivering multi-story timber structures (including record-holders like the Brock Commons Tallwood House type). Comparable on engineered timber and large-format prefabrication.
• Haas Fertigbau: German prefabricated timber builder producing multi-story residential and commercial timber structures. Comparable in prefabrication approach, German market focus, and turnkey delivery model.
• Regnauer Fertigbau GmbH & Co. KG: Bavarian timber construction company building multi-story residential and commercial timber projects with own factory. Regional competitor with comparable modular timber approach.
• Rubner Holzbau: South Tyrolean timber construction specialist operating across the DACH region in multi-story timber and engineered wood projects. Direct comparable on industrial prefabrication and structural timber engineering.
• CREE Buildings (Rhomberg Gruppe): Austrian timber-hybrid modular construction firm offering a serial system for multi-story residential buildings — directly comparable to HOLZUNION's System Q concept in technology and target customer base.
• ZÜBLIN Timber (Ed. Züblin AG, Timber Division): German general contractor with a dedicated timber construction division delivering multi-story timber and timber-hybrid buildings. Competes directly with HOLZUNION in the German urban multi-family and public-building timber market.
• Müller-Blau: German timber construction company specializing in multi-story timber and timber-hybrid projects with own prefabrication. Direct comparable on engineering timber capabilities and German regional delivery.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@hu-holzunion
• Facebookfacebook.com/61584285303769
• LinkedInlinkedin.com/company/hu-holzunion-gmbh
• Instagraminstagram.com/holzunion

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries5 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 HU-Holzunion GmbH