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Resource context
This resource is a TED talk titled “Why Are We Demolishing Homes During a Housing Crisis?” published by TED and presented at TEDxBerlin by architect Olaf Grawert (listed as author/speaker). It focuses on European housing demolition and its social and environmental consequences, and argues for renovation and transformation of existing buildings as an alternative.
Demolition during a housing crisis
Grawert states that “every minute, somewhere in Europe, a house is demolished” by human action. The talk frames demolition as a driver of lost homes and disrupted communities at a time when “millions are struggling to find an affordable home,” young people cannot move out, working people struggle to keep housing, and homelessness is rising in many countries.
Profit and the real-estate value system
The talk attributes much demolition to profit incentives. Grawert says real estate is “the most valuable asset in the world,” and that in the prevailing market logic “the old can never beat the new,” pushing a cycle of demolition and new construction. He describes how speculators calculate returns through land, location, market potential, demolition (“clear the land”), rebuilding, and extracting profit per square meter—an approach he characterises as a “spreadsheet that only counts money” and does not account for who lives in the building.
Social costs that are not priced in
Grawert distinguishes “value” from “price,” arguing that budgets typically exclude non-financial costs. He lists examples of what demolition can erase: memories and stories connected to homes, family and neighbourhood relationships, and a broader “sense of belonging.” These impacts are presented as “hidden costs” that are rarely reflected in financial decision-making.
Environmental and waste impacts
The talk links demolition and construction to climate and resource pressures. It states that the building sector is the largest CO₂ emitter globally, accounting for 38% of emissions, and that Europe’s construction industry is the biggest waste producer, responsible for 36% of all waste (compared with 8% from private households). The argument is that energy and emissions from both demolition and rebuilding are “unleashed” because social and ecological values are not counted in the current system.
Renovation as a scalable alternative
As an alternative, the talk highlights renovation and transformation approaches, citing French architects Lacaton & Vassal. A detailed example is the Grand Parc social housing project in Bordeaux (530 apartments), carried out with Druot and Hutin Architects. Residents stayed in place during works; prefabricated elements were craned in and stacked onto the existing façade, old windows were replaced with large sliding doors, and winter gardens were added to increase light and space. Reported timings include half a day to place prefabricated elements, two days to open the façade, two days to connect the new façade, and one week for interior renovation—around two weeks total to improve living conditions.
Costs and policy change
Grawert reports a cost comparison: around €55,000 to renovate one apartment versus €165,000 for a standard new apartment (about one third of the cost). The talk concludes that renovation requires shifting legal and financial frameworks that currently favour new construction (subsidies, building codes, risk and credit systems). It also introduces a European Citizens’ Initiative with the slogan “Renovate, don’t speculate,” aiming to gather one million supporters across the EU to push for laws that make renovation the norm.