Lease agreement extension: template and procedure
Our lawyers have prepared 8 basic types of lease agreement addenda, updated for 2026 (Word and PDF).
An addendum to a lease agreement can address virtually any change to terms subsequently agreed by both parties. The most common are adjustments to rent, changes to the lease term or clarification of rules for using the property. Would you like to be sure that your agreement and any changes are set up correctly from the outset? Find out how hassle-free property rental works.
An agreed change to the rent can be recorded in an addendum. State the new amount and effective date, and distinguish it from utilities advances. The procedure for a unilateral increase differs from an agreement between both parties and must comply with the agreement and the law; a fixed term alone does not mean that rent can only be changed through a new agreement.
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If the tenant has incurred a high energy bill underpayment, it is worth increasing the advance payments. The landlord is entitled to take this step at any time during the year, but it depends on how the advances are paid. If they are agreed as a flat-rate payment together with rent and other payments, you must deal with the increase in advance payments by means of an addendum. If you prepare an annual statement of utilities, it is sufficient to notify the tenant unilaterally in writing of the change in the amount of the advances. You may request payment at the new rate from the first day of the month following delivery of the written notice.
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Use a new provision when the wording of one of the clauses in the original lease agreement needs to be changed.
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As the name suggests, a general addendum to a lease agreement is used for any change to the lease agreement agreed by both parties.
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If both contracting parties agree to extend a fixed-term lease agreement, an addendum must be drawn up in which both parties express their consent. In addition to identification details, it is necessary to state which lease agreement it concerns and until when the lease is extended.
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If you decide to increase the security deposit, you must proceed in accordance with the legal requirements. Remember to identify the contracting parties and the lease agreement, and state the new security deposit amount.
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If the tenant's contact details have changed, these changes must be recorded in the agreement. An addendum can be used to record the change of details.
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If the owner's contact details have changed, these changes must be recorded in the agreement. An addendum can be used to record the change of details.
Get templateAn addendum to a lease agreement must always state:
It must also include the validity of the addendum (for a fixed or indefinite term) and the signatures of both parties.
Addendum No. 1
to the lease agreement dated …………………
Concluded between the parties
Name:
tel.:
date of birth:
permanent address:
(hereinafter referred to as the "landlord")
a
Name:
tel.:
date of birth:
permanent address:
(hereinafter referred to as the "tenant")
Subject of the addendum
Final provisions
In…….on……….
…………………………… ………………………………
Tenant landlord
Read the answers to the most frequently asked ones.
Would you like to continue a fixed-term tenancy? The addendum package includes a separate lease agreement extension template in DOCX (Word) and PDF formats. You can obtain the file via the existing form; download the ZIP file from the subsequent thank-you page. In the archive, find the “Lease Agreement Extension” folder.
The template is a basis for adaptation, not an individual legal review. Amending an already ended tenancy, automatic renewal or a disputed termination may require a different approach.
Get the Word and PDF addendum package · I need a new lease agreement instead of an addendum
The most reliable way to agree an increase in rent or service charge advances is through an addendum with the tenant. The law permits unilateral changes only under specific conditions.
The parties agree the amount of the advances. The landlord, as the service provider, may change them unilaterally during the year, but only to the extent corresponding to a change in the price of the service or for another legitimate reason, for example where the scope of the service changes. The new advance may be required no earlier than from the first day of the month following delivery of written notice, and the change must be properly justified in the notice; otherwise, the increase will not take effect (§ 4 odst. 4 zákona č. 67/2013 Sb.).
Include the following in the addendum or notice:
Rent may be increased by agreement in an addendum or under a provision in the agreement, such as an inflation clause. Without such an agreement, the landlord may propose an increase under § 2249 of the Civil Code: the proposal must be in writing, 12 months must have passed since the last change, and rent must not increase by more than 20 % over three years or exceed comparable local rent. The indicative limit can be calculated using the rent increase calculator.
State rent and advances separately in the addendum: advances are reconciled after the end of the billing period, whereas rent is not.
An addendum changes specific provisions of the original agreement. To extend the tenancy, state the date of the original agreement, the flat, both parties and the new end date of the tenancy. When changing the rent, distinguish rent from service charge advances and state when the change takes effect. Keep all other provisions that you are not changing in force.
Before signing, compare the addendum with the original agreement: it must not contain a different description of the flat, conflicting dates or an unclear amount. Each party retains a signed copy. Adapt the template to the specific situation; downloading the document does not replace individual legal advice.
Are you dealing with a new prospective tenant, rather than simply extending an existing tenancy? See the tenant screening procedure. If you would like to delegate the search, agreements and subsequent management, compare a real estate agency, property manager and guaranteed rent.