Replacing windows in a condo: permission, consistency and pitfalls

An owner replaced their windows over the summer without asking. Here is how the board can stop it happening again.

This is one of the most common and least understood topics in condo life. An owner wants new windows: better insulation, less noise, less upkeep. The project looks strictly private — the windows are inside their flat, after all. It is far less private than it looks.

The difficulty is that a window sits on the boundary: its use is private, but its external appearance belongs to the façade, which is common. Exactly the situation set out in private works and common areas.

Why approval is usually required

As soon as the replacement changes the building’s external appearance — material, colour, pane layout, glazing bars, opening type — it touches the façade and requires the meeting’s approval. A perfectly identical swap raises the question less; in practice "strictly identical" is rare.

• Switching from timber to another material: a visible change from the street.
• A change of colour, however slight: white is not one single colour.
• Changing the number or shape of the panes, dropping the glazing bars.
• Replacing shutters or blinds at the same time.
• Adding a projecting roller-shutter box.

Separately from the association, planning rules may apply, particularly in protected areas: a prior declaration to the town hall may be needed. The two approvals do not replace one another.

Best practice: a framework resolution

Handling requests one at a time, year after year, exhausts meetings and produces incoherent façades. Many buildings adopt a framework resolution setting the acceptable characteristics once and for all.

• Reference material and shade, with a precise colour chart rather than plain "white".
• Pane layout and whether glazing bars are required.
• Type and colour of shutters and boxes.
• A duty to inform the manager before works and supply the joiner’s specification.

Every owner then knows what they can do without another meeting, and the board simply checks compliance. That is the preparation role described in a well-built agenda.

And when the work is already done?

A common situation: the windows are in, they do not match the building, and nobody asked. The board has no sanctioning power, but it can alert the manager, who alone can act on behalf of the association.

In practice the meeting may have to rule after the fact. Regularisation is possible but never automatic — and a refusal exposes the owner to restoring the original state. Hence the value of informing owners upfront: see how to communicate usefully.

Who pays for what

Replacing the windows of one unit is in principle at that owner’s expense, even though the external appearance is controlled by the association. It changes when the meeting decides a building-wide replacement: the cost then becomes collective and is shared under the applicable rules.

A global replacement is often best value inside a wider project: see the steps of an energy renovation and what the collective energy assessment reveals.

A consistent façade is not decreed after the fact: it comes from a framework resolution voted before the first request.

Track requests with CoproHarmony

CoproHarmony lets the board record every works request, keep specifications and photographs, and see instantly what was approved, for whom and on what conditions. Create your free space.