What rhtb: gruppe does

rhtb: gruppe is an Austrian interior construction group founded in 1999, operating as a multi-trade general contractor (Innenausbau-Generalunternehmer) for large-scale commercial, institutional, and infrastructure projects. The group comprises four entities: rhtb: projekt gmbh (Austria flagship), rhtb: immobilien gmbh (residential and commercial real estate development), rhtb: bau service gmbh (small-to-medium interior fit-out), and rhtb: projekt de gmbh (Germany operations). Its core service scope covers floors (double and hollow-space floors including climate-integrated systems), walls (drywall, fire protection, glass, system partitions), ceilings (acoustic, metal, mineral fiber, integrated heating/cooling ceilings), and room climate systems, coordinated under a single-source general contractor mandate. The customer base spans government (Bundesimmobiliengesellschaft, Flughafen Wien AG, City of Vienna), large enterprises (BMW Munich, ERSTE Group, PORR, Sedlak), higher education (WU Wien, FH Campus Wien, mdw), and hospitality (Ritz Carlton, Motel One), with landmark projects ranging from 21,000 m² to 129,000 m².

The company's underlying technology is BIM (Building Information Modeling) combined with Lean Construction / Last Planner System methodologies, enabling detailed prefabrication planning (e.g., BIM-modeled border control booths at Vienna Airport) and just-in-time material delivery for projects with up to 100+ concurrent specialists on-site. rhtb: is a Gold Status Partner of MAARS Living Walls for system partition walls and maintains long-standing supply relationships with KNAUF (drywall systems), MERO-TSK (raised floors), and Rockfon (acoustic ceilings). The firm employs 50+ certified tradespeople (Facharbeiter) supported by a formal apprenticeship program that has produced WorldSkills and AustrianSkills participants. A standardized product line, the halo Pod acoustic workspace, complements the project services business.

Revenue is generated primarily through project-based contracts awarded via competitive tenders or Early Contractor Involvement with general contractors, property developers, and public agencies. Pricing is project-specific and not publicly disclosed. The group operates offices in Vienna (headquarters), Bad Vöslau, Pöllau, and Berlin, with revenue mechanics split across multi-trade interior fit-out (Austria and Germany), small-to-medium enterprise and private fit-out services, and real estate development sales. In May 2026, PORR acquired a 51% majority stake, providing strategic capital and a distribution channel while rhtb: retained its brand identity and independent operating structure.

Name

rhtb: gruppe

Legal name

rhtb: projekt gmbh

Website

https://rhtb.at

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

rhtb: gruppe is an Austrian interior construction general contractor delivering multi-trade fit-out (floors, walls, ceilings, climate systems, system partitions) using BIM and Lean Construction for large-scale commercial, institutional, and infrastructure projects across Austria and Germany, with a real estate development arm and 51% ownership by PORR.

Ownership category

akta.pro rank

Product category

Commercial Interior Construction Services

NAICS

Nonresidential Building Construction (2362), Construction (23), Building Equipment Contractors (2382)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Construction - Special Trade Contractors (1700), Operative Builders (1531)

akta.pro primary industry

Drywall, Partitions & Suspended Ceilings (IMAFANAG)

akta.pro secondary industries

Residential Interior Fit-Out (Multi-Family & High-End) (IMAFANAE), Education & Public Sector Interior Fit-Out (IMAFANAD)

Keywords

• Interior construction services
• Multi-trade fit-out
• Drywall construction
• Commercial interior fit-out
• Raised floor systems

Headquarters

HQ city

Wien

HQ country

Austria

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Multi-Trade Interior Fit-Out (General Contractor): rhtb: projekt gmbh serves as general contractor for large-scale multi-trade interior fit-out projects in Austria, managing trades across floors, walls, ceilings, glass system walls, climate systems, and floor finishes. Projects range from major landmarks (Wien Museum, FH Campus Wien) to commercial office buildings (Central Hub, PORR Haidequerstrasse). Revenue is project-based, typically awarded through competitive tender or early contractor involvement.
2. Small-to-Medium Interior Fit-Out Services: rhtb: bau service gmbh handles smaller and medium-sized interior fit-out projects including framework orders with ongoing work and flexible scheduling. Serves both private and commercial clients with access to full group resources.
3. Real Estate Development: rhtb: immobilien gmbh develops and constructs residential buildings (apartments, housing complexes) and commercial spaces, selling or renting units. Projects include Wohnpark Gleisdorf, Donauterrassen Kritzendorf, Wohnhaus Wien-Donaustadt, and Office Base Bad Vöslau.
4. Germany Multi-Trade Fit-Out: rhtb: projekt de gmbh operates as the specialist entity for multi-trade interior fit-out in Germany, serving as a general contractor for projects in the German market (e.g., BMW Munich, Cuvry-Höfe Berlin).

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

rhtb: gruppe is a one-stop-shop interior construction general contractor (Mehrgewerke Ausbau) that coordinates floor, wall, ceiling, climate system, and system partition wall trades for large-scale commercial, public, educational, and residential projects in Austria and Germany. Through four subsidiaries, the group delivers object-related multi-trade interior fit-out as general contractor, smaller/medium-sized fit-out services, real estate development, and a standalone sound-isolating workspace pod (halo Pod).

Product overview

rhtb: gruppe is a construction group offering a portfolio of four subsidiary companies for object-related multi-trade interior finishing. The core offering consists of rhtb: projekt gmbh (large-scale interior construction general contractor in Austria), rhtb: immobilien gmbh (real estate development), rhtb: bau service gmbh (smaller/mid-size projects), and rhtb: projekt de gmbh (Germany operations). Services span interior construction general contracting, floors (double floors, hollow space floors), walls (drywall, fire protection, glass walls), ceilings (gypsum, metal, acoustic), climate ceilings (heating/cooling), and system partition walls. The company operates a 'just-in-time' delivery concept and uses BIM and Lean Construction management methods. A notable product is the halo Pod, a sound-isolating workspace pod developed with partner MAARS.

Differentiator

Problem solved

Functional benefit

Brands

• rhtb: projekt: Multi-trade interior finishing general contractor for large-scale projects in Austria.
• rhtb: immobilien
• rhtb: bau service
• rhtb: projekt de
• halo Pod

Products and services

• rhtb: projekt gmbh — Multi-Trade Interior Fit-Out General Contracting (Austria) General contractor service for object-related multi-trade interior construction in Austria, coordinating all trades and product groups (floors, walls, ceilings, climate, system partitions) and delivering projects from pre-planning through handover.
• rhtb: immobilien gmbh — Real Estate Development Development and construction of high-quality residential buildings (apartments, housing complexes) and commercial spaces, sold or rented to end-users and investors.
• rhtb: bau service gmbh — Small and Medium-Sized Interior Fit-Out Construction services for smaller and medium-sized interior fit-out projects with flexible scheduling and short lead times. Serves both private and commercial clients with access to full group resources.
• rhtb: projekt de gmbh — Multi-Trade Interior Fit-Out (Germany) General contractor service for multi-trade interior construction in Germany, offering general contractor services for interior construction projects (e.g., BMW Munich, Cuvry-Höfe Berlin).
• halo Pod Compact pod solution made from MAARS system partition walls that isolates sound, featuring integrated LED lighting, power outlets, and ventilation. Available in Class A (1200x1200x2360mm) and Class B (1200x1200x2300mm) variants.

Quantifiable outcome

• BMW Munich project completed 5 months ahead of schedule (16 months total) despite no contractual end date or penalties in work contracts
• +4 more outcomes

Named customers16 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

14 partnerships are on record, tiered core and minor.

• HABAU Hoch- und Tiefbaugesellschaft m.b.H.coreStrategic or Co-development PartnerHABAU served as the general contractor commissioning rhtb: for the Central Hub project (Vienna Siemensstraße, 21,000 m², September 2023 – February 2025). rhtb: executed all fit-out works under this engagement. HABAU also commissioned rhtb: for the HABAU Auersthal project (2023).
• Bacon Gebäudetechnik GmbHminorChannel Partner/ Reseller/ DistributorBacon Gebäudetechnik GmbH commissioned rhtb: for the metal heating and cooling ceiling installation (19,000 m²) at the Central Hub project as a specialist sub-contract within the overall HABAU mandate.
• HNP Architects ZT GmbH (DI Sascha Meis)minorStrategic or Co-development PartnerArchitecture firm responsible for the Central Hub design. DI Sascha Meis of HNP Architects ZT GmbH served as architect on the project.
• maars (MAARS Living Walls)coreTechnology or IntegrationMAARS is the world's largest system partition wall manufacturer. rhtb: is the Gold Status Partner (Goldstatuspartner) of MAARS in Austria. rhtb: uses MAARS system partitions (CORE, Horizon, LaLinea, String2) across its projects including Vienna Airport border control booths, GESIBA offices, and the halo Pod product. The partnership enables rhtb: to offer premium system wall solutions.
• KNAUFcoreTechnology or IntegrationKNAUF is a key system provider for rhtb:, supplying wall systems (e.g., 1,000 m² at PORR Haidequerstrasse), drywall systems, and acoustic ceiling solutions used across major projects. Long-standing preferred system partner.
• MERÖ-TSK (MERO)coreTechnology or IntegrationMERO-TSK is a key partner for raised floor systems (Doppelböden). rhtb: has installed tens of thousands of square meters of MERO floors across projects (e.g., Central Hub: 21,000 m², BMW Munich: 30,500 m², ERSTE Campus: 74,000 m²). Long-standing system partner.
• Rockfon (part of ROCKWOOL Group)coreTechnology or IntegrationRockfon supplies acoustic ceiling solutions used by rhtb: on education projects. rhtb: installers received specialized training in Germany for Rockfon Acoustic ceiling installation at the Christine Nöstlinger Education Campus (14,000 m² of acoustic ceilings).
• Elektro FerstlminorImplementation/ SI/ Consulting PartnerElectrical contractor partner on the Vienna Airport border control booth project, responsible for electrical installations integrated into MAARS CORE system booths.
• Möbel GasteigerminorImplementation/ SI/ Consulting PartnerFurniture partner on the Vienna Airport border control booth project.
• Schlosserei Metall + GlasminorImplementation/ SI/ Consulting PartnerMetal and glass locksmith partner on the Vienna Airport border control booth project.
• ATELIER 23 ARCHITEKTEN ZT GMBHminorImplementation/ SI/ Consulting PartnerArchitecture firm responsible for the University of Music and Performing Arts Vienna (mdw) roof extension project, commissioned by Bundesimmobiliengesellschaft.
• Certov / Winkler + Ruck ArchitektenminorImplementation/ SI/ Consulting PartnerArchitecture firms responsible for the Wien Museum expansion and renovation design.
• Dipl. Ing. Wilhelm Sedlak Ges.m.b.H.coreStrategic or Co-development PartnerLong-standing partnership with Sedlak as general contractor on multiple projects including Austria Center Vienna modernization (Sanierungs-Los 2) and SVA Wien complete renovation. Multiple project engagements demonstrate a trusted relationship.
• Raiffeisenbank (Finanzierungspartner)minorStrategic or Co-development PartnerLong-term financing partner for rhtb: immobilien gmbh residential development projects, offering attractive credit options to buyers.

Scale indicators11 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• GOLDBECK: Large German design-build contractor specializing in commercial buildings, office fit-out, and system construction. Overlapping with rhtb: on office fit-out GC mandates in Germany and Austria; serves similar enterprise and developer customers.
• HABAU Hoch- und Tiefbaugesellschaft: Austrian general contractor that has commissioned rhtb: as fit-out subcontractor (Central Hub, Auersthal). Overlaps with rhtb: as both a potential client and competitor for large Austrian interior fit-out mandates.
• KAEFER: Global interior services, insulation, and surface solutions contractor with strong DACH presence. Comparable in multi-trade interior fit-out delivery for industrial, commercial, and energy clients; competes for similar large-project GC mandates.
• Lindner Group: German-headquartered interior fit-out and building services specialist with floors, walls, ceilings, and climate systems. Directly comparable product scope and target customer base (large-scale commercial and institutional fit-out) to rhtb: projekt gmbh, and a benchmark for what a scaled DACH interior fit-out GC looks like.
• Rhomberg Bau: Austrian construction group with building construction, interior fit-out, and real estate development divisions. Closely mirrors rhtb:'s four-entity structure (project / real estate / service) and competes for similar Austrian multi-trade interior fit-out mandates.

Broad incumbents

• Strabag: One of Europe's largest construction groups with extensive Austrian building and interior fit-out operations. Significantly larger than rhtb: but competes for the same large institutional and commercial fit-out projects in the DACH region.
• PORR: Major European construction group and rhtb:'s 51% majority owner. Overlaps as a competitor in large-scale GC work while also being a parent and pipeline source; relevant as the dominant benchmark for Austrian construction scale and margin profile.
• Swietelsky: Major Austrian construction group with national reach across building construction, infrastructure, and interior fit-out. Broader portfolio than rhtb: but competes for similar mid-to-large interior fit-out scopes in Austria.

Others

• Saint-Gobain: Global building materials group and owner of KNAUF-adjacent product portfolios. rhtb: depends on KNAUF and Rockfon (a ROCKWOOL subsidiary) as core system partners; Saint-Gobain is a critical upstream supplier and ecosystem participant, not a direct competitor.
• Drees & Sommer: German construction and real estate consultancy with strong interior fit-out project management practice. Sits adjacent to rhtb: as a planning/PM partner on complex mandates rather than as a direct GC competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries4 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 rhtb: gruppe