Architekturbüro Reinberg ZT GmbH

What Architekturbüro Reinberg ZT GmbH does

Architekturbüro Reinberg ZT GmbH is a Vienna-headquartered, founder-owned architectural practice established in 1982 (civil engineering GmbH since 2006) that delivers solar and ecological architecture, Passivhaus design, plus-energy building design, and energy-efficient renovation services. The firm operates as a six-person team—five of whom hold university degrees—led by architects Georg W. Reinberg and Martha Enríquez-Reinberg, with a cumulative track record of approximately 350 designs and more than 100 realized projects, all built to high ecological standards. Service lines span residential (single-family and social housing), commercial, public/educational, and tourism typologies, with projects delivered across at least nine countries including Germany, Romania, Estonia, China, Morocco, Iran, Cyprus, and the Czech Republic.

The practice's underlying technology centers on passive solar utilization (orientation, thermal mass, conservatories and winter gardens), active renewable integration (photovoltaics, solar thermal, heat pumps), Passivhaus thermal envelopes with central heat-recovery ventilation, and renewable/clay-based construction materials. Documented performance includes up to 60% heating-energy reduction in renovation cases (e.g., Gablitz) and plus-energy output in active-solar houses (Kraig). The firm's distribution is sales-led, securing work through Austrian public architectural competitions, invited tenders, and direct private commissions; project delivery is supported by a standing specialist partner ecosystem covering structural engineering (GG Ingenieure ZT, DI Kurt Pock), HVAC (OBKIRCHER PLUS), building physics (IPJ Jung, IBO), landscape (D/D Landschaftsplanung), and lighting (Jakob Uhl).

Revenue is generated through professional services fees negotiated per project, including competition prizes and multi-year construction supervision engagements. Customers include public-sector clients (Gemeinde Wien, Landesregierung Burgenland, ÖBB, Inner Mongolia government entities), social housing developers (Österr. Siedlungswerk, Baugruppen), and private developers/individuals (Rodler & Company Immobilienholding, single-family clients). The firm is profitable on a project basis but operates at boutique scale; revenue figures are not publicly disclosed. Marketing is conducted primarily through a project-portfolio website, international teaching and lecturing, and memberships in ZV Architekt_innen, Network Passivhaus, IBO, OeGFA, and Eurosolar Austria.

Name

Architekturbüro Reinberg ZT GmbH

Legal name

Architekturbüro Reinberg ZT GmbH

Website

https://reinberg.net

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

1–10 employees

Short description

Austrian founder-owned architecture firm specializing in solar and Passivhaus design plus ecological renovation, serving public-sector, social-housing, and private clients across Austria and at least nine international markets.

Ownership category

akta.pro rank

Product category

Sustainable Architectural Services

NAICS

Architectural Services (541310), Residential Remodelers (236118)

SIC

General Bldg Contractors - Residential Bldgs (1520), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industry

Community Engagement & Participatory Planning (BPAHAKAO)

Keywords

• Solar architecture design
• Ecological building design
• Passive house design
• Sustainable building renovation
• Construction management services

Headquarters

HQ city

Hietzing

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Architectural Planning and Design Services: Professional architecture services including urban concepts, architectural design, planning, and execution management. Revenue is generated through project-based fees for design commissions, competition prizes, and ongoing construction supervision and management services.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

The firm provides professional architectural services including urban concepts, architectural design, planning, construction supervision, and construction management. It specializes in solar architecture, passive house (Passivhaus) design, ecological building design, and energy-efficient renovation/retrofitting for residential, commercial, and public buildings. Projects are delivered for public and private clients across Austria and internationally.

Product overview

Architekturbüro Reinberg ZT GmbH is an Austrian architecture firm offering comprehensive architectural services rather than a traditional product-based company. The firm operates as a unified service practice providing architectural design, construction management, and ecological building consulting across multiple specializations. The core offerings include Solar Architecture and Passive House Design as key service specializations, complemented by general Architectural Design Services and Renovation and Retrofitting. The firm, led by architects Georg W. Reinberg and Martha Enríquez-Reinberg, has completed approximately 100 projects since 1982, all meeting high ecological standards.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Design Services

Quantifiable outcome

• Up to 60% reduction in heating energy consumption (e.g., Gablitz renovation: from 12 cords of wood to 5 cords annually)
• +2 more outcomes

Named customers7 records

Segments4 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

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Snøhetta: International architecture and design firm with a strong public portfolio and explicit sustainability agenda across cultural, civic, and landscape projects. Relevant as a larger, broader incumbent that overlaps on ecological design philosophy but operates at significantly greater scale.
• Coop Himmelb(l)au: Vienna-headquartered architecture firm known internationally for deconstructivist public and cultural buildings. Comparable as an Austrian design practice with global reach and award-winning public-commission work, though broader in typology and scale than Reinberg.

Emerging players

• Studio Gang: US-based architecture practice with an explicit focus on ecology-driven design across cultural, civic, and residential typologies. Comparable on the integration of sustainability into core design philosophy and a research/teaching-driven studio culture.

Direct peers

• Werner Sobek Group: Germany-based engineering and architecture firm globally recognized for sustainable, zero-energy, and resource-efficient building design. Closely comparable on its integration of structural engineering, Passivhaus-grade performance, and emphasis on recyclable building systems.
• Sauerbruch Hutton: Berlin-based architecture firm recognized for sustainability-driven design and material research on public and cultural buildings. Comparable on European scale, public-project emphasis, and a design philosophy rooted in ecological and material-conscious architecture.
• Dietrich | Untertrifaller: Austrian architecture firm with offices in Austria, Switzerland, and Germany producing award-winning sustainable residential, public, and commercial buildings. Directly comparable on geography, building typologies, and commitment to low-energy/environmental design.
• Marte.Marte Architekten: Austrian architecture practice with a strong portfolio in public, cultural, and residential buildings across the Alpine region. Comparable as a similarly-sized Austrian firm that wins public-sector commissions and emphasizes material-honest, sustainable design.
• Baumschlager Eberle Architekten: Austrian-headquartered architecture firm with offices across the DACH region focused on sustainable, energy-efficient building design. Highly comparable as a similarly-sized DACH-based practice with deep specialization in ecological architecture and a track record of cross-border projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Architekturbüro Reinberg ZT GmbH