Office-to-Residential Conversion: A New Value Proposition for the German Market

Overview of the Resource

The article, published by global design firm Gensler and authored by Lukasz Platkowski, Managing Director of Gensler Germany, examines the pressing housing shortage in Germany and proposes office‑to‑residential conversions as a sustainable solution. It draws on recent demographic data, research from JLL and Destatis, and Gensler’s own conversion analysis tool, Conversions+, to illustrate both the scale of the challenge and the potential impact of adaptive reuse.

Demographic Pressure and Housing Gap

Germany’s population has risen to 84.3 million, the largest increase since reunification, driven by net migration of 1.5 million in 2022 and an ongoing annual growth of about 1.1 million. This surge creates a shortfall of roughly 17,000 housing units per year across the seven major cities, according to JLL Research 2023 and Destatis. Economic constraints—high borrowing costs, rising material prices, limited labor, and reduced new construction—exacerbate the deficit.

The Conversions+ Tool and Its Efficiency

Gensler’s Conversions+ tool evaluates existing office buildings for residential suitability based on site context, building form, floor plate, envelope, and services. The tool compresses feasibility assessment from weeks to minutes, unlocking interest from developers previously hesitant to explore conversion projects. 🇩🇪 Current Adoption in German Cities Among Germany’s “Big 7” cities, only Frankfurt currently hosts office‑to‑residential projects, representing 16 % of its 2024–2025 residential pipeline. The analysis suggests a broader opportunity, estimating that more than 25 % of office stock in other major cities such as Berlin and Munich could be feasibly converted.

Environmental Impact of Conversions

Gensler has evaluated over 1,300 potential conversions worldwide, finding that 32 % are viable. Full conversion of these sites could avoid 3.3 billion kilograms of carbon emissions. Approximately 40 % of embodied carbon resides in building structures and façades, highlighting the climate benefits of repurposing existing envelopes rather than new construction.

Economic and Cost‑Saving Advantages

Adaptive reuse can lower construction costs by leveraging existing structural elements and reducing material demand. The approach also aligns with decarbonisation goals, offering developers a financially attractive, low‑carbon pathway to meet housing demand.

Policy Landscape and Public‑Private Collaboration

Successful scaling will require adjustments to local building codes, change‑of‑use regulations, and supportive incentives. Gensler advocates for public‑private partnerships and government subsidies to accelerate conversion projects, mirroring initiatives already active in the United States where Gensler contributed to President Biden’s advisory committee and secured a federal grant.

Global Perspective and Transferability

The article positions the German market within a broader international context, noting that Gensler’s conversion methodology has been applied in over 130 cities across multiple continents. The experience gained abroad provides a proven framework that can be adapted to German regulatory and market conditions.

Outlook for Sustainable Housing in Europe

Office‑to‑residential conversions present a viable, carbon‑efficient strategy to address Europe’s urban housing shortages. By repurposing stranded office assets, cities can quickly increase residential supply while mitigating climate impact, supporting resilient, sustainable urban growth for the continent.