Projects / House Haerdtl and house Plischke

Restoration of the Werkbundsiedlung - Vienna Urban Renewal Prize 2013

As the result of a European call for tenders, P.GOOD Architects have been commissioned for the general planning to restore and renovate 48 residential buildings in the historic Viennese “Werkbundsiedlung” housing estate. The entire restoration project was divided into four phases, which was carried out over a period of five years. 

Restoration Objectives

The goal of the project is to preserve the diverse qualities of the original structures while at the same time bring the buildings up to contemporary and damage-free standards. Particular attention was paid to the position of the Werkbundsiedlung as a historically significant ensemble of modern architecture in Austria. Therefore, as much of the existing structure has been preserved and protected for the future. In many places, the original building materials had to be uncovered from years of over-plastering or layers of covering. The visible surfaces were restored with the same materials and techniques as during the original construction in 1932.

Restoration Measures

The restoration measures include: Refurbishing and partially exposing the original plaster surfaces; retrofitting windows and doors; renovating floors, walls and ceilings; remodeling bathrooms; reinstalling plumbing and electrical systems; repairing banisters and handrails; as well repairing outdoor areas including fences and gates. In the houses designed by Gerrit Rietveld, variations of the ground floor layout were implemented based on his original designs – as documented in sketches and letters by Rietveld – but which had not been originally carried out in 1932.

Thermal Retrofit

Such sensitive building projects must carefully take into consideration the issue of improving thermal efficiency. The planning team developed a set of combined measures which reduce heating costs by approximately 50% without the need for insulating facades and simultaneously ensuring no condensation build-up in the apartments. In particular, these measures included: insulating roofs and terraces with tapered insulation; insulating below-ground walls; retrofitting the existing windows with high quality thermal K-glass and silicone seals and installing a heat recovery ventilation system, high-efficiency gas condensing boilers and drainage measures.


Energy efficiency:

Hoffmann House:  160.59 Kwh / m2y (from 292.07 to 131.49 Kwh / m2pa)

Rietveld House:   95.43 kWh / m2y (from 197.54 to 102.11 Kwh / m2pa)

Restoration of Further Houses

The work on the first four houses was accompanied by an in-depth survey of the remaining 44 houses as well as by meetings with the tenants. P.GOOD Architects are supported by a team of professional consultants for metal, wood and plaster restoration and specialists in building physics, electrical engineering and building services. The special challenge of working with occupied residential properties is to bridge the interests of heritage conservation with the needs of residents. Therefore, individual solutions of coordinated measures will be tailored for each house.

Overall, the four-stage restoration project will take approximately five years. The Viennese conservation society Wiener Substanzerhaltungsgesellschaft & Co KG (WISEG), which invited the tenders for the project planning, was founded by the city specifically for the repair work. At the end of the restoration, the 48 houses will remain in the possession of the City of Vienna.

Project Partners

Restoration of architectural facades: Plan B - Konzepte für die Restaurierung
Restoration of timber structures: Mag. Peter Kopp – Restauratoren GmbH
Restoration of metal components: ARGE Objektrestaurierung
Restoration of linoleum: Klampfl Gmbh & CoKG
Building physics: Architekt Markus Gutmann
Electrical engineering: Ingenieurbüro Klement
Building services: Glaninger
Statics: Werkraum Wien
Masonry inspection: DI Dr Karl-Heinz Steininger


Further information:

Client WISEG Wiener Substanzerhaltungsg.m.b.H. & Co KG
Address Veitingergasse 117, Veitingergasse 109, Vienna, 1130
Units 2 Residential buildings
Project Status completed 2020
Project Team P.GOOD Architects Team: Arch DI Susanne Grad
Örtliche Bauaufsicht: Arch. DI Alexander Williams