If you are registering or amending an Estonian company, one of the most common points of confusion is the address format. The Estonian Business Register does not accept free-text addresses. It uses the national Address Data System (ADS), and the address you submit must match the structured format in that system exactly.
This guide explains the required format, what each component means, and how to avoid the most common mistakes.
The Address Is Not Free Text
When you enter an address in the e-Business Register portal, you are not typing a mailing address. The system presents an autocomplete field connected to the official ADS database. You must select the correct address object from the suggestions, not type it manually.
The ADS (Aadressiandmete susteem) is Estonia’s national address register, maintained by the Land Board (Maa-amet). Every building in Estonia has a structured address object in this system, and the Business Register uses these objects directly.
Required Components
A correctly formatted Estonian business address in the register consists of the following components:
- County (maakond) — e.g. Harju maakond
- City or municipality (linn / vald) — e.g. Tallinn
- District (linnaosa), where one exists — e.g. Kesklinna linnaosa
- Street and house number (tanav ja maja number) — e.g. Parda tn 8
- Postal code (postiindeks) — e.g. 10151
If the address includes an apartment or office number, that must also be included. A full example as it appears in the register:
Harju maakond, Tallinn, Kesklinna linnaosa, Parda tn 8, 10151
Is “Harju maakond, Kesklinna linnaosa” Required?
Yes. These are not optional decorative elements. They are part of the official ADS-normalized address structure.
In register practice, the full ADS-normalized address includes county, and district is included where the ADS address object contains one. For Tallinn addresses, this means Kesklinna linnaosa, Pohja-Tallinna linnaosa, Kristiine linnaosa, and so on are all required components. The technical regulation specifies that the district name is included where it exists in the ADS object.
The official ADS address handbook gives the normalization example: “Aia 16, Tallinn” becomes “Harju maakond, Tallinn, Kesklinna linnaosa, Aia tn 16” in the register. If you are in Kesklinn, the district name is not optional.
Asukoht vs Aadress: Two Different Things
Estonian register law separates two concepts that are often confused:
- Asukoht — the registered seat of the company, recorded at municipality level only (e.g. “Tallinn”). This appears in the articles of association.
- Aadress — the full street-level ADS address shown on the register card (e.g. “Harju maakond, Tallinn, Kesklinna linnaosa, Parda tn 8, 10151”).
Both appear on the registry entry, but they serve different purposes and follow different rules when changes are made.
Legal Address vs Business Address
The legal address (juriidiline aadress) is the company’s registered address shown on the Business Register card. Every company must have one. The business address (tegevuskoha aadress) is the actual place where the business activity is carried out. It appears in sector-specific activity notices, licences, or other operational registrations. Many companies have a registered legal address without a separate tegevuskoha address, particularly companies that operate entirely online or remotely.
The Role of the Registrikood
The registrikood (registry code) is the unique identifier assigned to a company when it is entered in the Business Register. It does not change, even if the company transforms its legal form. When filing an amendment, including an address change, you identify the company by its registrikood. In the portal, you can search for the entity by name or registry code to start any change filing.
How to Change Your Company Address
Address changes are filed in the “Kontaktid” (Contacts) section of the e-Business Register amendment form. The process depends on whether the new address stays within the same municipality.
Same city or municipality (e.g. moving within Tallinn): File the address update in the portal. No amendment to the articles of association is needed. No state fee applies. The application is digitally signed by at least one board member.
Different city or municipality (e.g. Tallinn to Tartu): The articles must be amended to reflect the new asukoht at municipality level. The filing must include the competent body’s decision on the articles amendment, the minutes or voting record, and the updated articles text. For an OU, the competent body is generally the shareholders under the Commercial Code, so in practice this means a shareholder decision (osanike otsus). The amendment application must be signed by a board member. State fee applies.
Common Mistakes to Avoid
- Free-typing the address instead of selecting the ADS address object from the autocomplete. The register will not accept a manually typed address that does not match an ADS entry.
- Dropping components — leaving out the county, postal code, or district when the ADS object includes them.
- Confusing asukoht with aadress — amending the articles when only the street changed within the same municipality, or forgetting to amend them when the municipality changed.
- Not knowing when articles amendment is needed — a cross-municipality move means the articles must be amended with a competent body decision. A move within the same municipality does not.
- Inconsistent formatting — using your own word order or abbreviations instead of the exact ADS version.
The Simple Rule
In Estonia, the safest approach is not “format the address nicely” — it is “use the exact ADS address the register recognises.” Select the address from the portal autocomplete field, confirm the postal code, and submit. The system handles the formatting.
Need a Registered Address in Estonia?
If you need a compliant Estonian business address for your company, Capture Capital provides registered address services in Tallinn, accepted by the Business Register and fully ADS-compliant.
Full cost breakdown for Estonian company formation
How to change your company address
