SUPPLEMENTARY AGREEMENT TO THE LEASE AGREEMENT ✅ REAL ESTATE ✅ SERVICES

A lawyer collects information about the changes that need to be made (e.g., new lease amount, extension of term, change of parties).
Requests a scan or copy of the current lease agreement.
Analyzes the form and content of the agreement; restrictions that may affect the possibility of changes; the presence of conditions requiring the consent of a third party (e.g., sublease or lease through an agent); the need for notarization.

A lawyer drafts the text of the annex in accordance with Polish law and the Civil Code (Kodeks cywilny).
Includes in the document: the correct title (Aneks nr … do umowy najmu z dnia …), identification of the parties, reference to the original agreement, precise wording of the changes, clause on entry into force and on the continued validity of the remaining terms.
Agrees on the content with the client.
If necessary, prepares a bilingual version (PL/UA or PL/EN).

A lawyer checks whether notarization is required (for example, for an okazjonalnego lease agreement).
If necessary, arranges a notary appointment or provides recommendations regarding a notary.
Prepares instructions for the parties: how and where to sign the document, how many copies, how to transfer it to the other party.
At the client's request, represents their interests during signing (by power of attorney).

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Supplementary agreement to a lease agreement: when and why it is needed

A supplementary agreement (annex) to a lease agreement is a written document that amends or supplements the provisions of the existing lease agreement. Such an instrument is necessary in the following cases:

Change in the amount of rent.
Extension or reduction of the lease term.
Changes in the composition of the parties to the agreement (for example, replacement of the lessee).
Introduction of new provisions agreed upon by the parties after the signing of the main agreement.

Consulting a lawyer in such situations helps to avoid legal errors that could lead to the supplementary agreement being declared invalid or appealed.

Features of registration: form, notarization, and legal risks

The form of the supplementary agreement must correspond to the form established for the main agreement. Failure to comply with this requirement may result in the changes being invalid. We provide legal formalities taking into account the following aspects:

If the main agreement is concluded in writing, the annex must also be in writing.
If the contract is notarized (for example, in the case of a lease with special conditions), the supplementary agreement must also be notarized.
We check the annex for compliance with the provisions of the Polish Civil Code, in particular the provisions on the form of legal transactions, term of validity, liability of the parties, etc.

Our lawyers also provide assistance in cases where:

one of the parties refuses to sign the amendments;
there is a need for an annex to the agreement, the term of which has expired;
there are amendments to the agreement registered with the National Court Register (KRS) or submitted to a bank/institution.

Why should you turn to the Consultant legal marketplace?

We work with lawyers who specialize in Polish contract law.

We guarantee the legally correct form of document preparation — for both individuals and companies.

We provide an individual approach: from providing a template to full legal support.

We offer clear rates, transparent communication, and fast document preparation times.

We help you avoid risks in cases of disputes or inspections by regulatory authorities.

Conclusion

Need an additional agreement to your lease? Leave a request for consultation, and we will prepare a document that will legally protect your interests — quickly, competently, and in accordance with all the formalities of Polish law.