A balcony with a person on it collapsed in Copenhagen on July 3, exposing a structural safety problem that municipal data show is far more widespread than most residents realize: a 2023 city inspection campaign in selected streets found serious defects in about 37% of the older balconies it examined.
The incident underscores long-standing risks in Copenhagen’s classic apartment buildings, where many internationals live precisely because these older properties dominate the private rental market in central districts like Nørrebro, Vesterbro and Østerbro. According to Statistics Denmark, about 64% of Copenhagen dwellings are in multi-storey apartment buildings, far above the national average of 38%, meaning Copenhagen residents are more likely to live in multi-storey buildings where balconies are common.
The hidden scale of the balcony safety problem
Copenhagen’s own technical committee minutes from late 2023 reveal that inspectors examined 193 older balconies in one targeted district campaign. They found significant corrosion damage in 71 cases. Nineteen balconies were judged so critical they had to be closed immediately.
Those figures mean roughly one in ten balconies inspected was ordered shut, yet this enforcement data appears only in obscure municipal documents, not in public safety campaigns. According to SBi, balconies and external galleries feature prominently among recorded partial structural failures in older residential buildings, despite these being a minor share of total structural volume.
Older steel-cantilever balconies are a high-risk category because rust inside the wall can progress invisibly for years before sudden failure. Previous Danish accident investigations have singled out this building type as especially vulnerable, and Copenhagen’s coastal climate accelerates the corrosion process.
Who lives in the danger zone
According to Statistics Denmark, apartments in buildings from before 1940 still house about 40% of Copenhagen residents, compared with about 19 to 20% nationally. Foreign citizens make up roughly 24 to 26% of residents in central Copenhagen districts, more than double the national average of 10%, according to Statistics Denmark population data.
There is no publicly consolidated official statistic breaking down balcony accidents by nationality. Many foreign citizens live in privately rented apartments in older buildings, making them part of the population most directly exposed to these structural risks.
New densification, old structures
Copenhagen has recently launched several initiatives to expand housing capacity and streamline building approvals, including in older districts where balconies are often extended or added as part of densification projects. According to Copenhagen Municipality’s 2025 budget carry-over, several million kroner have been allocated to reduce the backlog for new local plans, directly affecting how quickly renovation and rebuilding projects get planning approval.
Additional funding is earmarked for strengthening user feedback in building-case handling, aimed at reducing administrative delays that can hold up safety work on existing structures. But these faster approvals may add extra loads to balconies that were never designed for today’s commonly expected standards.
The regulatory gap
Current building regulation BR18, based on Eurocodes, generally uses design live loads of around 3 to 4 kN per square metre for residential balconies, higher than the roughly 2 to 3 kN per square metre used in older Danish norms. Many legacy balconies were not designed for today’s loads. According to Bolig- og Planstyrelsen’s 2021 technical guidance on existing balconies, residents must never use balconies where there is doubt about load-bearing capacity, and in case of doubt they must immediately be cordoned off until an expert has assessed the structure.
Sweden’s Boverket has documented fatal and injury-causing balcony accidents and introduced structured inspection obligations as a result. There is no publicly consolidated national tally of equivalent incidents in Denmark, underlining weaker visibility of the problem.
What tenants can do
Residents can trigger formal safety checks if they suspect balcony problems. Under the Danish Building Act, building owners including landlords and housing associations are responsible for ensuring balconies are safe. Tenants have a right to complain if they believe this is not the case.
In Copenhagen, residents can submit a written complaint to the municipal building authority if owners fail to act. The authority can then order an expert assessment and, if needed, close the balcony. For internationals in private rentals, a first step is to notify the landlord or property manager in writing, preferably with dated photos of rust, cracks or tilting.
If there is acute danger such as visible deformation, broken fixings, or after an incident like a partial fall, residents should immediately stop using the balcony, keep others off it, and call the police at 114 or emergency services at 112 for cordoning and emergency inspection. Many larger rental companies provide English-language customer support, and Copenhagen Municipality’s main citizen-service pages offer some English guidance on housing and building cases.
