Subletting in Finland: tenant consent & mistakes

Rent & increases (index, fair rent) 2 min read · published September 11, 2025

A tenant considering subletting needs practical information about when landlord consent is required, what limits apply to agreements and which common mistakes lead to disputes or termination. This guide explains the basics of subletting in Finland, emphasizes the importance of written documentation and deadlines, and gives step-by-step advice on requesting consent and resolving disputes. It also offers tips on collecting evidence and what to do if informal discussion does not solve the problem.[1]

What subletting means

Subletting means that a tenant lets another person use part or all of the rented dwelling. The basic rule in Finland is that the lease agreement and legislation set out whether consent is required and under what conditions.[1]

Common subletting mistakes

  • Subletting without the landlord's written consent
  • Vague or incomplete written sublease agreement
  • Unclear rent payment responsibilities between subtenant and primary tenant
  • Neglecting maintenance and repair responsibilities
  • Lack of evidence: messages, receipts and photos missing in disputes
Good documentation and clear written agreements reduce the risk of disputes.

Consequences of mistakes

Common consequences include demands to terminate the lease, landlord claims for compensation, or damages. If subletting is prohibited in the lease and consent is not given, the landlord may consider this a breach of contract.

How to request landlord consent

Always start by requesting consent in writing. Describe the scope of the subletting, subtenant details, time period and terms. Attach copies of IDs and the proposed sublease if needed.

  • Write a clear request and attach the proposed sublease agreement
  • Set a reasonable response time and state when the subletting would begin
  • Save all messages and receipts for later reference
Always ask for a written response from the landlord even if consent was given verbally.

FAQ

Do I always need the landlord's consent to sublet?
In most cases yes; the lease or legislation may require consent. Check the lease terms and the Act on Residential Leases.[1]
How quickly must the landlord respond to a consent request?
The law does not always set a single response time, but a reasonable processing time is recommended and it is good to state it in the request.
Can the landlord forbid subletting?
The landlord can forbid subletting if the lease contains a prohibition or there are substantial reasons; disputes can be taken to court if necessary.[3]

How-To

  1. Check the lease terms and any prohibitions
  2. Draft a written consent request and attach a proposed sublease
  3. Set a response deadline and send the request in a way that creates a record
  4. Collect evidence: messages, receipts and photos of any issues
  5. If the issue is not resolved, seek official advice or bring the matter to court

Help and support


  1. [1] Finlex: Act on Residential Leases (481/1995)
  2. [2] KKV: Consumer and Competition Authority
  3. [3] Oikeus.fi – court services
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Finland

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.