1. The building register is the starting point
A project starts with a check rather than an application, and the reason is sequence rather than caution. The content of the application depends on the register's position, and correcting register data takes time that is not available in parallel with building.
The register states what is officially known, not what is technically true. The national building register consolidates data on all buildings and is accessible through a public view, which means third parties rely on it too.
| What the register holds | Who relies on it |
|---|---|
| Data on existing buildings, intended use and volumes | the local authority in a procedure |
| Permits issued and notices submitted | the designer when describing the existing situation |
| Documents submitted for buildings | the buyer and the bank when preparing a transaction |
Three discrepancies occur even on plots managed in good faith: the building is absent from the register entirely, the volume data do not match reality, or works carried out are not reflected because they were done without a procedure. The most common is the volume discrepancy, since the calculation methodology has changed over time; the most serious is the third, because such works are unauthorised.
2. Three levels of formality
The question is not whether a permit is needed but which level of formality applies. The levels differ in procedure, cost and requirements, and for the client the most tangible difference is financial.
| Level | State fee | Building design | Procedure |
|---|---|---|---|
| Building permit | yes | always | more thorough, stricter requirements |
| Building notice | no | in some cases | shorter |
| Neither is required | no | no | free construction |
The applicable level does not follow from a single feature but from the intersection of four variables, which is why the same building may require a permit for one piece of work and nothing at all for another. They must be checked together rather than in sequence.
| Variable | Example |
|---|---|
| Type of structure | residential or non-residential, the requirements differ |
| Built-up area | the bands are narrow |
| Height of the structure | a couple of metres changes the outcome |
| Type of activity | erection, reconstruction, extension, demolition |
With an extension a fifth factor is added, its extent relative to the existing volume, which ties the question directly to the register data: if the volume recorded there is wrong, so is the extension percentage and hence the applicable procedure. It can change the level of procedure.
Free construction does not mean building without rules, and this is the most expensive misconception in the whole branch. The exemption concerns the procedure, not the requirements: fire safety requirements must still be met, location restrictions continue to apply, and the authorities retain the right of construction supervision in these cases too.
3. Why the table must be read rather than memorised
The answer on the applicable level sits in the table in Annex 1 to the Building Code, which crosses types of activity with the size and type of the structure and states what is required for each combination. This guide does not reproduce that table, for two reasons, of which the second is the more practical.
The first is that the table has changed: the Building Code amendments entered into force on 1 August 2026 and affected, among other things, which level applies in which cases. The second is that working from memory is dangerous here, because the bands are narrow and a couple of metres of height or a couple of square metres of area change the outcome.
The practical rule follows directly: open the Annex 1 in force afresh for every project, even where a similar case was handled recently. Applications and notices, together with the accompanying documents, are as a rule submitted digitally through the building register, which requires logging in beforehand with an ID card or through the state portal.
4. Taking into use
A finished building is not yet a usable building, because the procedure checks conformity rather than completion. For houses with one or two dwellings the occupancy permit was replaced by an occupancy notice, which shortens the procedure roughly threefold.
A shorter procedure does not reduce the requirements, however, it reduces the margin. Where what is built differs from the design, the occupancy procedure does not repair the documentation, so changes must be documented during construction rather than at its end.
5. Existing buildings
Legalisation requirements depend not on the building but on its age, and the construction date divides into periods carrying different requirements. Buildings erected before 22 July 1995 are deemed lawful, which simplifies their treatment considerably.
Lawful is not the same as entered in the register, however, and that distinction is the key to the whole branch. The consequences for sale and lending follow from the register, not from lawfulness: the bank looks at what is recorded, not at what is lawful.
6. The 2026 changes
The amendments simplified procedures, but not all of them: for more complex buildings the permit requirement widened, and this is rarely mentioned in commentary. Three changes deserve separate attention, because their effect in time and money is uneven.
| Change | Effect |
|---|---|
| The detailed plan obligation can in certain cases be replaced by design conditions | up to 3 years versus 1 to 2 months |
| The €500 state fee for entering an unauthorised building in the register is gone | resolving old cases became cheaper |
| The burden of proof for buildings erected before 1995 is reduced | legalisation became clearer |
The first row is the change with the greatest effect on schedules in the whole reform. The other two coincide and make the second half of 2026 unusual: resolving old cases has never been cheaper, and the recommendation in professional sources is to review the documents before a dispute rather than after.
7. Five rules that follow from the above
Check the register before signing the design contract, because the content of the application depends on the register's position and correcting data does not run in parallel with building. The wrong starting point forces redesign.
Open the Annex 1 in force afresh for every project, because the table changed on 1 August 2026 and working from memory is now particularly risky.
Document changes during construction, because the occupancy procedure checks conformity and does not repair documentation after the fact.
Check whether design conditions suffice instead of a detailed plan where a project is on hold; the difference is up to three years versus one to two months. The difference in time is considerable.
Distinguish lawfulness from a register entry, because the consequences for sale and lending follow from the register, not from whether the building was lawful at the time. One does not substitute for the other.
What this guide does not cover
Construction cost is covered in a separate guide, as are energy efficiency, public procurement, budgeting and renovation. This guide is confined to procedure and the register and does not address the substantive questions of construction contracts or construction supervision.
Summary
In Estonia every construction procedure begins and ends in the building register, and the register's position determines both the content of the application and the consequences for sale and lending. The three levels of formality, building permit, building notice and free construction, differ in state fee, design requirement and length of procedure, and the applicable level follows from the intersection of four variables in Annex 1 to the Building Code.
The amendments in force since 1 August 2026 simplified most procedures but widened the permit requirement for more complex buildings. The greatest effect on schedules comes from the possibility of replacing a detailed plan with design conditions, which cuts the wait from up to three years to one or two months, and the €500 state fee for entering unauthorised buildings in the register is gone.
This guide offers professional orientation as at the date of verification. It replaces neither the legislation in force nor the assessment of the local authority.