SHORT ANSWER TO THE MAIN QUESTION

A sublease arises when a tenant allows another person to use the leased property, or part of it.

A person renting an apartment directly from the owner is therefore not a subtenant. They are a tenant, even if the document is titled “Sublease Agreement”.

Under the general Czech rules on lease, the tenant needs the landlord’s consent to allow a third party to use the leased property.

Residential leases, however, have special rules.

If the tenant permanently lives in the apartment, they may under certain conditions sublet part of it without the landlord’s consent.

If the tenant does not permanently live there, the landlord’s consent is required for a sublease of the whole apartment or part of it.

A sublease also depends on the main lease.

When the main lease ends, the sublease ends no later than at the same time – even if the tenant and subtenant agreed on a longer sublease term.

YOU MAY BE THINKING…

“Do I need the owner’s consent to sublet?”

“What if I sublet only one room and continue living in the apartment myself?”

“Can the landlord prohibit subletting entirely?”

“What if the landlord simply does not respond to my request?”

“Can the sublease last longer than my lease?”

“Does a subtenant have the same protection as a residential tenant?”

“Can the tenant terminate the sublease without giving a reason?”

“What if the main lease ends but I, as subtenant, do not even know about it?”

“Is Airbnb a sublease?”

“Do the same rules apply to offices or commercial premises?”

These are not all the same legal situation.

CLIENTS OFTEN ASK…

What is the difference between a lease and a sublease?

Under a lease, the right to use the property is granted by the landlord, typically the owner or another person entitled to lease it.

Under a sublease, the right to use the property is granted by the tenant.

The basic structure is:

owner / landlord → tenant → subtenant

The subtenant usually has no direct lease relationship with the owner.

That is why the subtenant’s position depends on the tenant’s own rights.

Do I need the landlord’s consent to sublet an apartment?

It depends on the circumstances.

The tenant permanently lives in the apartment

The tenant may sublet part of the apartment without the landlord’s consent.

A typical example is:

“I live in a three-room apartment and sublet one room to another person.”

The tenant does not permanently live in the apartment

The tenant needs the landlord’s consent to sublet the whole apartment or part of it.

The request and the consent must be in writing.

If the landlord does not respond to a written request within one month, Czech law may in certain circumstances treat the consent as granted.

That rule does not apply if the parties have agreed on a prohibition of subletting.

The main lease should therefore always be reviewed as well.

Can I sublet the whole apartment if I no longer live there?

Yes, but only with the landlord’s consent.

This is where a common mistake occurs:

The tenant moves out.

Hands the entire apartment over to another person.

And does not tell the landlord.

That is no longer a situation where the tenant continues living in the apartment and merely shares part of it.

A sublease in breach of the applicable rules may amount to a serious breach of the tenant’s obligations.

That can put both the tenant and the subtenant at risk.

Can the sublease last longer than the main lease?

No.

The tenant can only create a sublease right for as long as they themselves have the underlying lease right.

So if:

the main lease ends on 31 December,

the tenant cannot genuinely guarantee the subtenant possession until the following June.

The sublease ends no later than together with the lease.

Does a subtenant have the same protection as a residential tenant?

Not automatically.

The legal protection of a residential tenant and a subtenant is not identical.

Czech case law treats sublease as a separate but accessory relationship dependent on the main lease.

Special protective provisions created for residential tenants therefore do not automatically apply to subtenants in full.

That makes the actual wording of the Sublease Agreement especially important, particularly as regards duration and termination.

Can the subtenant sign directly with the owner?

If the owner themselves grants another person the right to use the apartment in return for payment, the relationship will usually be a lease, not a sublease.

The title of the document does not decide the legal classification.

A sublease assumes the existence of a main lease from which the subtenant’s right is derived.

WHAT THE LAW SAYS VS. WHAT HAPPENS IN PRACTICE

A sublease is a “second-level” right of use

Czech courts describe sublease as an accessory relationship – meaning that it depends on the main lease.

That has several practical consequences.

The sublease depends on the lease:

• when it is created,
• in its scope,
• and in its duration.

The subtenant therefore needs to know more than just the terms of their own Sublease Agreement.

They also need to understand the main lease.

The subtenant should know when the main lease ends

Imagine:

The tenant has a lease until 31 December 2027.

In September 2027, they enter into a Sublease Agreement:

“for a fixed term of 24 months.”

To the subtenant, this may look like two years of secure occupancy.

It is not.

The sublease cannot continue after the main lease ends.

The subtenant should know whether the required consent exists

If the landlord’s consent is required but the tenant does not have it, this is not merely an internal problem between the landlord and tenant.

The breach may put the main lease at risk.

And therefore the sublease as well.

The subtenant may pay on time and comply fully with the Sublease Agreement, but still lose the premises because of a breach committed by the tenant.

The tenant remains responsible to the landlord

Under Czech law, if a tenant allows a third party to use the leased property, the tenant remains responsible to the landlord for that person’s conduct as if the tenant were using the property themselves.

So subletting does not mean:

“This is no longer my problem.”

Quite the opposite.

The tenant remains the key contractual party vis-à-vis the landlord.

Residential law treats part of an apartment differently from the whole apartment

This is one of the most important practical distinctions.

The tenant actually continues to live in the apartment

Czech law gives the tenant more flexibility to share part of the apartment with another person.

The tenant moves out and hands the apartment over to someone else

The landlord has significantly more control and their consent is required.

The decisive question is therefore not only:

“Am I subletting one room or the entire apartment?”

but also:

“Does the tenant genuinely continue to live there?”

BIGGEST RISKS AND COMMON MISTAKES

❌ Mistake: the Sublease Agreement says nothing about the main lease

Consequence

The subtenant does not know:

• how long the tenant’s lease lasts,
• whether it may be terminated easily,
• whether subletting is allowed.

Better approach

The Sublease Agreement should expressly reflect the existence of the main lease and its key parameters.

The subtenant does not necessarily need to receive every private provision of the main lease.

But they should know at least the matters that directly affect their own sublease.

❌ Mistake: “The Tenant confirms that the landlord has consented.”

But nobody has seen the consent.

Consequence

The subtenant relies on a statement that may be incorrect or insufficient.

Better approach

If consent is required, document its existence properly.

❌ Mistake: the sublease term is longer than the main lease

Consequence

The agreement creates an expectation that the tenant cannot fulfil.

Better approach

Tie the duration of the sublease to the main lease and clearly explain the dependency.

❌ Mistake: the Sublease Agreement simply copies a Lease Agreement

Consequence

The document may look professional but ignores the fundamental distinction:

the subtenant is not the owner’s tenant.

Some protective lease provisions cannot simply be copied across.

Better approach

Draft a genuine Sublease Agreement, not a lease with a different heading.

❌ Mistake: it is unclear what the subtenant may actually use

“Room in the apartment.”

Which room?

Can the subtenant use the living room?

The cellar?

Balcony?

Parking space?

Kitchen?

Does the washing machine belong to the tenant or the owner?

Better approach

For a partial sublease, define precisely:

• areas for exclusive use,
• areas for shared use,
• equipment and accessories.

❌ Mistake: one monthly payment with no explanation

The subtenant pays CZK 22,000.

Does that include:

• subrent,
• electricity,
• water,
• internet,
• building services,
• cleaning,
• furniture?

Consequence

When prices change, nobody knows which component may be adjusted.

Better approach

Separate the subrent from services, or at least define precisely what the lump-sum payment includes.

❌ Mistake: a security deposit with no rules

The subtenant pays two monthly payments as a “deposit”.

But the agreement does not say:

• what may be deducted,
• when it is returned,
• how damage is settled,
• how deductions must be documented.

Better approach

Regulate the security deposit separately and specifically.

❌ Mistake: nobody addresses the end of the main lease

Consequence

The tenant receives a notice of termination.

The subtenant is told only a few days before they need to move out.

Better approach

Require the tenant to inform the subtenant without undue delay of anything that may lead to termination of the main lease.

In residential sublease, Czech law also expressly requires the tenant to provide the subtenant with information relevant to the termination of the lease.

HOW TO APPROACH IT – REALITY, NOT THEORY

1. First determine whether it is actually a sublease

Ask a simple question:

Who is granting the right to use the premises, and what is the legal basis of their own right?

Owner → user

typically a lease.

Tenant → another user

a sublease.

This distinction matters more than the title of the document.

2. Review the main lease

Not only its term.

Also:

• whether subletting is allowed,
• whether consent is required,
• any prohibition,
• permitted use,
• number of occupants,
• restrictions on business activity,
• other relevant conditions.

A tenant cannot safely promise a subtenant something that the tenant themselves is not entitled to do.

3. Deal with the landlord’s consent

For residential property, the key questions are:

• whether the tenant permanently lives in the apartment,
• whether the whole apartment or only part of it is being sublet,
• what the main lease says.

For other leased property, the general lease rules and the main lease need to be reviewed.

4. Define the premises precisely

For the entire apartment, this is relatively simple.

For one room, it is not.

For example:

exclusive use of Room No. 2

plus

shared use of the kitchen, bathroom, hallway and balcony.

For offices, the same principle applies to:

• specific rooms,
• meeting rooms,
• reception,
• storage,
• parking,
• shared systems.

5. Structure the payments

Distinguish between:

• subrent,
• service advances,
• utilities,
• internet,
• other operating costs,
• security deposit.

Also define:

• payment dates,
• reconciliation,
• changes to advances,
• consequences of arrears.

6. Define responsibility for the premises

The Sublease Agreement should deal with:

• damage,
• routine maintenance,
• reporting defects,
• repairs,
• alterations,
• keys and access devices,
• responsibility for persons admitted by the subtenant.

7. Think carefully about termination

Do not stop at:

“The Agreement is entered into for an indefinite term.”

Also define:

• who may terminate,
• on what grounds,
• with what notice period,
• whether immediate termination grounds exist,
• what happens in case of breach,
• what happens in case of non-payment.

A residential sublease does not automatically follow the same termination regime as a protected residential lease.

8. Include a mechanism for termination of the main lease

This is specific to sublease.

The agreement should address:

• the tenant’s information duty,
• termination of the sublease,
• handover of the premises,
• settlement of payments,
• return of the security deposit.

PRACTICAL EXAMPLES

The following examples are illustrative.

👉 The tenant moves abroad for a year

The tenant has an indefinite residential lease.

They want to let someone else use the entire apartment for one year.

Because they will no longer permanently live there, the landlord’s consent is required.

It is not enough to say:

“But I am still the tenant.”

That is not disputed.

It is exactly why the rules on sublease apply.

👉 The tenant remains in the apartment and sublets one room to a student

The tenant genuinely continues to live there.

The sublease concerns only part of the apartment.

Czech law gives the tenant considerably more freedom in this situation.

It is still advisable to review the main lease, rules on additional occupants and practical rules for shared living.

👉 Three-year sublease, eight months left on the main lease

The subtenant invests in furnishing the premises.

Eight months later, the owner does not renew the main lease.

The subtenant says:

“But my agreement still has two years left.”

That does not preserve the sublease.

A sublease cannot survive the legal right from which it originated.

👉 A company sublets half of its office

Company A leases an entire floor.

It does not need all the space and sublets part of it to Company B.

The agreement needs to address more than the price.

For example:

• whether subletting is permitted under the main lease,
• which areas Company B may use,
• building access,
• reception,
• internet,
• parking,
• security,
• shared meeting rooms,
• utilities,
• registered office or business premises,
• termination of the sublease if the main lease ends.

In a commercial sublease, this operational layer may be more important than the subrent itself.

9️⃣ WHY YOU SHOULD BE CAREFUL WITH “I’LL DO IT MYSELF”

A generic template may say:

The Tenant hereby sublets the Apartment to the Subtenant for a monthly subrent of CZK 20,000.

Simple.

But it does not address:

• whether the tenant is allowed to sublet,
• whether consent is required,
• when the main lease ends,
• whether it may be terminated,
• whether the subtenant knows the duration of the main lease,
• what exactly is being used,
• which services are included,
• who deals with defects,
• how the security deposit works,
• how the sublease may be terminated,
• what happens when the main lease ends.

Sublease also makes it particularly easy to create a contract that looks like a lease but gives the subtenant a sense of legal certainty that the tenant cannot actually provide.

AI can generate a Sublease Agreement very quickly.

But without the main lease, it may not know whether the person offering the sublease is legally entitled to grant the promised right at all.

LAWYER’S RECOMMENDATION + CHECKLIST

For a Sublease Agreement, I would begin with one control question:

Can the tenant genuinely give the subtenant the exact right that the agreement promises?

Then I would check:

• It is clear who the owner/landlord is and who the tenant is.

• The relationship is genuinely a sublease, not a lease.

• The main lease is still in force.

• The end date of the main lease is known.

• The main lease has been reviewed.

• It is clear whether landlord consent is required.

• Any required consent exists in the proper form.

• The subleased premises are precisely identified.

• Shared areas are defined where only part of the apartment is sublet.

• The permitted use is defined.

• The subrent is defined.

• Services and utilities are regulated.

• Reconciliation is regulated.

• Any security deposit is properly structured.

• Rules for returning the deposit are defined.

• Responsibility for defects and repairs is defined.

• Liability for damage is addressed.

• Rules for use of the premises are defined.

• Termination rights are addressed.

• Non-payment is addressed.

• The tenant must inform the subtenant about threats to the main lease.

• Termination of the sublease upon termination of the main lease is expressly addressed.

• Handover at the end of the sublease is regulated.

• Final financial settlement is regulated.

FAQ

What is a Sublease Agreement?

Under a Sublease Agreement, the tenant allows another person – the subtenant – to use the leased property or part of it.

The subtenant’s right derives from the main lease.

What is the difference between a Lease Agreement and a Sublease Agreement?

Under a lease, the tenant receives the right to use the property from the landlord.

Under a sublease, the subtenant receives the right from the tenant.

The sublease therefore depends on the main lease.

Do I need the owner’s consent to sublet an apartment?

If the tenant does not permanently live in the apartment, the landlord’s consent is required to sublet the whole apartment or part of it.

If the tenant permanently lives there and sublets only part of it, Czech law provides a different regime.

The main lease should also always be reviewed.

What if the landlord does not respond to the request for consent?

Where consent is required under Section 2275 of the Czech Civil Code and the landlord does not respond to a proper written request within one month, the consent is deemed granted.

This does not apply if the parties agreed on a prohibition of subletting.

Can a sublease last longer than the main lease?

No.

The sublease ends no later than together with the main lease.

What happens to the subtenant if the tenant receives notice of termination?

Termination of the main lease ultimately leads to termination of the sublease as well.

For residential sublease, the tenant also has a statutory duty to inform the subtenant of facts relevant to the termination of the main lease.

Does a subtenant have the same rights as a residential tenant?

Not automatically.

A sublease is a legally distinct and dependent relationship, and residential tenant protections do not automatically transfer to the subtenant in full.

The Sublease Agreement itself is therefore especially important.

Can offices or other commercial premises be sublet?

Yes.

The sublease still depends on the main lease and cannot survive it.

For commercial premises, it is especially important to review the main lease and regulate the practical conditions of use in detail.