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Affordable housing: STRABAG launches TETRIQX – serial construction solutions starting from € 1,950/m²

14 August 2025

TETRIQX properties are equipped to a high standard with wood-aluminium windows and optional wood façades. The designs also include open spaces such as loggias.
The three building types feature optimised layouts ranging from approximately 44 m² to around 88 m².
The construction system functions like a building kit. The three building types can be added on top of existing residential buildings up to seven storeys high.

Construction costs from € 1,950/m²*
At least four months shorter construction time compared to conventional methods
Up to 50% reduction in CO₂ emissions versus traditional construction

STRABAG has unveiled a new, serially producible residential construction product that tackles several of Austria’s housing market challenges at once: rising construction costs, a shortage of affordable housing, lengthy build times and the need for sustainable building methods.

TETRIQX is a modular building system with a high degree of prefabrication. Functioning like a building kit, it offers three fully planned residential building types for different construction categories. All three can be added on top of existing residential buildings up to seven storeys high and feature optimised layouts ranging from approximately 44 m² to around 88 m².

New solutions to the housing crisis

At a time when conventional construction and funding models are reaching their limits, TETRIQX opens up new perspectives for urban housing development – high quality, efficient, sustainable and, above all, affordable. Thanks to its modular prefabrication, construction times are reduced by up to four months compared to traditional methods. In some cases, overall project timelines can even be cut in half. This not only makes investment in new housing more attractive again but also reduces disruption to neighbours from construction sites.

Affordable housing is possible – but not with yesterday’s solutions. We have to build faster, more sustainably and more standardised, without compromising on quality. With TETRIQX, we deliver a solution that enables prices from € 1,950 per square metre for high-quality homes. That’s a genuine remedy for the looming housing crisis.

Markus Engerth
Member of the Management Board of STRABAG AG Austria

Innovation for sustainable construction

TETRIQX also sets new benchmarks for sustainability. With concrete core activation, buildings can be heated efficiently in winter and kept pleasantly cool in summer – at no additional construction cost. This reduces heating and cooling energy requirements during operation by at least 22%. In addition, efficient serial production using sustainable materials cuts CO₂ emissions over the building’s entire life cycle by up to 50%.

The first projects are scheduled to start next year.

*Price as of 1 January 2025, excluding planning and parking garage.

TETRIQX properties are equipped to a high standard with wood-aluminum windows and optional wooden facades. Open spaces such as loggias are also already planned

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The three apartment types have optimized floor plans ranging from approx. 44m2 to approx. 88m2.

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The building system works like a construction kit. The three apartment types can be extended to create residential buildings of up to seven storeys.

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Interior of a TETRIQX apartment

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Isabella Nutz
Press spokeswoman, Austria

+43 1 22422 1617

pr@strabag.com

Marco Reiter
Head of Investor Relations

+43 1 22422 1089

marco.reiter@strabag.com

STRABAG SE is a European-based technology group for construction services, a leader in innovation and financial strength. Our activities span all areas of the construction industry and cover the entire construction value chain. We create added value for our clients by taking an end-to-end view of construction over the entire life cycle – from planning and design to construction, operation and facility management to redevelopment or demolition. In all of our work, we accept responsibility for people and the environment: We are shaping the future of construction and are making significant investments in our portfolio of more than 250 innovation and 400 sustainability projects. Through the hard work and dedication of our approximately 89,000 employees, we generate an annual output volume of around € 20 billion.
Our dense network of subsidiaries in various European countries and on other continents extends our area of operation far beyond the borders of Austria and Germany. Working together with strong partners, we are pursuing a clear goal: to design, build and operate construction projects in a way that protects the climate and conserves resources. More information is available at www.strabag.com.