Holz & Raum Gmbh & Co. Kg - Isowoodbau

What Holz & Raum Gmbh & Co. Kg - Isowoodbau does

Holz & Raum GmbH & Co. KG, operating commercially as ISOWOODbau, is a family-owned German general contractor (Generalunternehmer/GU) and total contractor (Totalunternehmer/TU) for sustainable timber and timber-hybrid construction, headquartered in Finnentrop-Rönkhausen, North Rhine-Westphalia. Founded in 1989 and led since 2003 by Managing Director Tim Kirchhoff, the company operates across roughly 200 employees group-wide, with ~90 staff at the headquarters and prefabrication handled by its 100% subsidiary ISOWOODsystems. The firm serves municipalities, housing companies, investors, and commercial/industrial clients in Germany, delivering turnkey buildings including multi-family residential blocks, kindergartens, schools, fire and rescue stations, office buildings, production halls, healthcare practices, and hospitality venues.

The company's core differentiator is the proprietary ISOWOOD-Bauweise: a diffusion-open wooden stud-frame construction using a patented ecological insulation material (ISOWOOD Dämmstoff) made in-house from wood planing chips, layered with wood-fibre insulation boards and ÖKO construction boards, and delivered to KfW-40 efficiency standard (with passive-house, EH-55, or plus-energy classes on request). Components are CNC-prefabricated at the ISOWOODsystems facility, enabling short on-site construction times (e.g., 3 months for a 179 sqm physiotherapy practice; 6 months for a 1,504 sqm office building). A related residential brand, ISOWOODHAUS, covers single-family B2C construction under the same parent.

Revenue is generated through fixed-price turnkey construction contracts, with each project individually quoted (Festpreisgarantie) and typical project volumes of EUR 3-7 million per Bau- und Projektleiter. Distribution is exclusively direct: an enterprise and government field-sales motion led by the Head of Turnkey Construction Sales (Stefan Schneider, M.Sc. Architekt, MBA), supplemented by inbound lead capture via the corporate website (Request Info / Schedule Consultation CTAs), social-media presence, an extensive wiki/educational content hub, and earned media exposure (ARD broadcast). The company does not disclose annual revenue, has no external institutional funding, and operates as an independent German Mittelstand business.

Name

Holz & Raum Gmbh & Co. Kg - Isowoodbau

Legal name

holz & raum GmbH & Co. KG

Website

https://isowoodbau.de

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

1–10 employees

Short description

ISOWOODbau (Holz & Raum GmbH & Co. KG) is a German general and total contractor for sustainable timber construction, serving municipalities, housing companies, investors, and commercial/industrial clients with turnkey KfW-40 buildings using its proprietary ISOWOOD diffusion-open wall system.

Ownership category

akta.pro rank

Product category

Sustainable Timber Construction Services

NAICS

Softwood Veneer and Plywood Manufacturing (321212)

SIC

Prefabricated Wood Bldgs & Components (2452), Millwood, Veneer, Plywood, & Structural Wood Members (2430)

akta.pro primary industry

Softwood Plywood Manufacturing (IMAMACAA)

Keywords

• Sustainable timber construction
• Prefabricated commercial buildings
• Turnkey construction services
• Ecological insulation materials
• Modular wooden buildings

Headquarters

HQ city

Finnentrop

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. General contractor / turnkey construction (Schlüsselfertigbau): ISOWOODbau generates revenue as a general contractor (GU) and total contractor (TU), providing integrated project development, planning, manufacturing, and turnkey delivery of buildings in timber and timber-hybrid construction. Revenue is derived from fixed-price contracts for complete building projects, from multi-family residential to commercial, municipal, and institutional buildings. The company offers a fixed price guarantee (Festpreisgarantie) with detailed breakdown of all trades.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

ISOWOODbau (a brand of holz & raum GmbH & Co. KG) develops and delivers sustainable, turnkey timber and timber-hybrid buildings as a general contractor (GU) and total contractor (TU). The company uses its proprietary ISOWOOD ecological insulation (made from wood planing chips) combined with a diffusion-open wooden frame construction and CNC-controlled in-house prefabrication of wall, ceiling, and roof elements. It serves commercial, industrial, residential, public-sector, healthcare, and hospitality clients primarily in Germany.

Product overview

ISOWOODbau is a brand of holz & raum GmbH & Co. KG specializing in sustainable turnkey construction for commercial, residential, and public buildings using wood and wood-hybrid construction methods. The company's core offering centers on the ISOWOOD-Bauweise (ISOWOOD construction method) combined with the proprietary ISOWOOD-Dämmstoff (patented ecological insulation material made from wood shavings). As a general contractor (GU) or total contractor (TU), they provide integrated services spanning project development, feasibility analysis, planning, industrial prefabrication of building elements (walls, ceilings, roofs) using CNC technology, and turnkey delivery. Their project portfolio includes multi-story residential buildings, commercial and office buildings, public facilities (kindergartens, schools, fire stations), and healthcare/social buildings. The company operates a wholly-owned subsidiary, ISOWOODsystems, for production of prefabricated building elements.

Differentiator

Problem solved

Functional benefit

Brands

• ISOWOODbau: Brand focused on commercial, public, and multi-story residential construction in wood and wood-hybrid construction for B2B, B2G customers including municipalities, housing companies, investors, and commercial clients.
• ISOWOODHAUS

Products and services

• Schlüsselfertiger Objektbau (Turnkey Object Construction) Turnkey construction service delivered as general contractor (GU) or total contractor (TU) for commercial, residential, municipal, and industrial buildings in timber and timber-hybrid construction. Includes full project development, planning, prefabrication, and delivery under a fixed price guarantee.
• ISOWOOD-Dämmstoff (ISOWOOD Insulation Material) Patented ecological insulation material produced in-house from wood planing chips (Hobelspänen). Each batch is tested in the company's own laboratory and offers thermal storage capacity, summer heat protection through effective phase shift, and sound insulation without chemical additives.
• Mehrgeschossiger Wohnungsbau (Multi-Story Residential Construction)
• Gewerbe- und Bürogebäude (Commercial and Office Buildings) Construction service for commercial and office buildings including production halls combined with office spaces. Reference projects include Alfha Finnentrop (~1,000 sqm, completed 2008), Tecnorm (828 sqm, completed 2022), Prentler Immobilien (401 sqm, completed 2024), and Altrad Plettac Assco (1,504 sqm, completed 2020).
• Öffentliche Gebäude (Public Buildings) Construction service for public-sector buildings including kindergartens, schools, fire stations, and rescue stations. Reference projects include Kindergarten Wupper Radevormwald (1,020 sqm), Kindergarten Sprockhövel (354 sqm), GGS Olpe – Am Hohenstein (173 sqm, under construction 2025), Feuerwache Radevormwald, and Rettungswache Lembeck.
• Gesundheits- und Sozialeinrichtungen (Healthcare and Social Facilities) Construction service for healthcare and social facilities including hotels, physiotherapy practices, and medical centers. Reference projects include Naturhotel Wildewiese (~1,400 sqm with 21 hotel rooms, wellness area, and seminar rooms) and Physiotherapie-Praxis Bestwig (179 sqm, 3-month construction time, completed 2012).
• Projektentwicklung und Machbarkeitsanalysen (Project Development and Feasibility Analysis) Project development and feasibility analysis services provided as part of the integrated building process, from initial concept and project development through planning to turnkey delivery, serving as the early-stage consulting offering.
• Industrielle Vorfertigung von Bauelementen (Industrial Prefabrication of Building Elements) Industrial prefabrication service for wall, ceiling, and roof elements using modern CNC-controlled machinery in the company's own production facility, operated through subsidiary ISOWOODsystems. Enables short construction times, factory-level quality assurance, and high prefabrication degrees.

Quantifiable outcome

• Buildings maintain 22–23°C indoor temperature even at 30°C+ outdoor temperatures without air conditioning (Naturhotel Wildewiese testimonial)
• +4 more outcomes

Named customers11 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• ISOWOODsystems (100% subsidiary)coreTechnology or IntegrationISOWOODsystems is a 100% subsidiary of holz & raum GmbH & Co. KG responsible for the production of wall, ceiling, and roof elements. With a Europe-wide networked production facility, ISOWOODsystems ensures highest efficiency, quality, and precision using state-of-the-art CNC technology, manufacturing components to German quality standards. This subsidiary is the core manufacturing arm of the ISOWOODbau brand.

Scale indicators6 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Haas Fertigbau: German prefabricated timber construction company producing wall, ceiling, and roof elements in-house with CNC technology and offering turnkey delivery. Comparable to ISOWOODbau in industrial prefabrication approach and German mid-market building segments.
• SchwörerHaus: Family-owned German timber construction group with in-house prefabrication of building elements and turnkey delivery of residential and commercial projects. Comparable in size, family-ownership profile, and vertically integrated wood-element production approach.
• Ed. Züblin AG — ZÜBLIN Timber: Timber construction division of major German contractor Ed. Züblin AG (Strabag group). Delivers commercial, residential, and public timber buildings using engineered wood systems, competing head-to-head with ISOWOODbau in German turnkey timber construction tenders.
• Lignotrend: German manufacturer of engineered timber building elements (wall, ceiling, and roof components) using cross-laminated wood systems. Highly comparable to ISOWOODbau's ISOWOODsystems subsidiary in product and end-use application, though Lignotrend focuses on element supply rather than full turnkey delivery.
• Baufritz GmbH: Family-owned German sustainable timber construction company with full in-house prefabrication and turnkey delivery, focused on healthy indoor climate and natural materials. Closely comparable business model to ISOWOODbau, though Baufritz is more weighted to residential than commercial/public.

Broad incumbents

• Stora Enso — Building Solutions: Major Finnish-Swedish forest products company with a Building Solutions division producing CLT, LVL, and prefabricated building components for commercial and residential timber construction. Operates at significantly larger scale than ISOWOODbau, with broad European reach.
• Binderholz: Austrian-headquartered timber industry leader producing sawn timber, CLT (BBS), glulam, and solid wood panels for construction. A much larger upstream supplier of engineered wood systems used by German timber builders; competitive overlap with ISOWOODbau in CLT-based multi-story construction.
• Mayr-Melnhof Holz: Austrian timber processing group operating sawmills and engineered wood (CLT/HBS) production. Supplies timber construction inputs and competes in commercial/public timber building segments across the DACH region, with substantially larger scale than ISOWOODbau.

Emerging players

• Cadolto: German modular building manufacturer producing prefabricated steel and timber modules for hospitals, hotels, schools, and residential projects. Adjacent rather than direct overlap, but competes for similar public/commercial prefab tenders in Germany.
• KLEUSBERG: German modular construction company specializing in prefabricated building systems (including timber-hybrid) for schools, offices, administrative buildings, and healthcare. Overlaps with ISOWOODbau in German public-sector and commercial turnkey construction.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ISOWOODbau
• LinkedInlinkedin.com/company/isowoodhaus
• Instagraminstagram.com/isowoodbau

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 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 Holz & Raum Gmbh & Co. Kg - Isowoodbau