Why flat renovation budgets usually run over

What turns up once the walls are opened

Old panel flats and pre-war wooden houses both have a habit of hiding their real condition behind plaster and wallpaper. Once a wall is opened you might find old wiring that no longer meets current practice, damp patches from a long-forgotten leak, or crumbling mortar behind a socket. None of this shows up in a walkthrough before the job starts.

In Kalamaja and Nõmme wooden houses, the surprises are more often structural: soft floorboards, insulation that has settled or rotted, or a beam that needs attention. In Soviet-era panel blocks, it is more commonly old pipework hidden in a wall chase, or a floor that is far from level once the covering comes up.

These finds usually add hours rather than change the whole job, but they can add a meaningful amount to a bathroom or kitchen renovation in particular, since both involve opening up walls and floors around plumbing. A fixed quote covers what was visible or described at the time; anything found afterwards is agreed and billed separately, normally at the same hourly rate.

How the scope grows as the job goes on

It is common to decide partway through that as long as the wall is open anyway, it makes sense to also move a socket, add a light point, or replace a radiator while the floor is up. Each of these is reasonable on its own, and each adds hours and sometimes materials to a job that was quoted for a narrower scope.

This is not a mistake on anyone's part, it is simply how renovation decisions tend to go once a room is stripped back and you can see what is possible. The practical answer is to agree any addition as a separate item before it starts, so the invoice at the end still matches what was actually decided, rather than arriving as a surprise.

Small additions of this kind are exactly what odd jobs from 39 € an hour are for, whether that is done as part of the same visit or booked separately once the main renovation is finished and you have had time to live with the result.

Material prices move during the job

A renovation that runs over several weeks can see its material costs shift, particularly for tiles, flooring and sanitaryware bought against a specific budget line. A fixed quote is valid for 30 days and is based on the materials agreed at the time; if you change your mind about a tile or a taps and change to a more expensive range, that difference is yours to cover.

Buying materials yourself avoids the 10 % handling fee that applies when we source them for you, but it does put the timing risk on you: if a product goes out of stock partway through, a substitute may cost more or need reordering, which can hold up the schedule.

Where possible, buy or at least price the main materials before the job starts, and keep a small margin in that part of the budget rather than assuming the first quote you saw online will still be available six weeks later.

What is normally included in the price, and what is extra

A flat renovation quote from 180 € per job normally covers the labour for the agreed scope: demolition and preparation, the trades involved, and finishing to the standard discussed beforehand. It assumes reasonably normal access, meaning lift or ground floor, and a flat that is empty or clear enough to work in.

What is usually extra: materials, unless specifically agreed to be included; disposal of large volumes of construction waste; work found once walls or floors are opened; and anything that needs an electrician for wiring, which is priced and carried out separately as qualified electrical work. We do not do gas work and do not touch load-bearing walls; if a job reaches either, we will say so and point you to the right specialist.

Difficult access matters too: a fifth floor with no lift, a narrow stairwell, or a flat still full of furniture all add time that a straightforward job would not need. It is worth mentioning this upfront so it is reflected in the quote rather than discovered on the day.

• Included: labour for the agreed scope, standard preparation and clean-up
• Included: a written invoice itemising hours and work
• Extra: materials, unless agreed otherwise (10 % handling fee if we buy them)
• Extra: waste removal beyond normal volumes
• Extra: work uncovered once walls or floors are opened
• Extra: electrical work, priced and done separately by a qualified electrician
• Extra: difficult access — no lift, narrow stairwell, a flat still full of furniture

How much buffer to build in from the start

For a flat that has not been opened up before, whether that is a first renovation or one where the previous work is decades old, it is sensible to plan for the final cost to land above the initial estimate rather than at it. Older housing stock, in particular, tends to have more surprises than a newer development with underfloor heating and recent wiring.

As a rough planning figure, treating the first estimate as the minimum and keeping a reserve on top of it for hidden issues, added scope and material changes is more realistic than treating that estimate as a ceiling. The exact size of that reserve depends on the age and condition of the building and how much of it will actually be opened up.

The other half of the buffer is time, not just money: a job that finds a damp wall or old wiring behind it will take longer to finish, and having some flexibility on the schedule matters as much as having it in the account.