Can I renovate my own flat in Finland?
Surfaces yes — structures only with notice. As a shareholder you may freely redo your flat's surfaces: paint, wallpaper, swap the cabinets. The Housing Companies Act requires a written alteration notice before the work starts whenever it can affect company-maintained structures, plumbing and electrical systems or neighbouring flats — wet rooms, pipes, wiring, load-bearing walls, even a floor-material change for sound insulation. The common misreading is treating the notice as a permit application: the company cannot ban a proper alteration without grounds, but it may set conditions and supervise — and the shareholder pays the supervision costs.
📋 The rules
- Surface renovations (painting, wallpaper, furniture, floating floors) need no notice — telling the manager about bigger jobs is still good practice.
- An alteration notice to the company is required for work that can affect structures, insulation, plumbing/electrical systems or neighbouring flats — before starting.
- The company may set conditions and supervise (supervision costs on the shareholder) — but can't ban a proper alteration without grounds.
- Fixed electrical installations may only be done by qualified electricians — DIY wiring is illegal and dangerous.
- Wet-room waterproofing and plumbing need professionals; tenants may not renovate at all without the landlord's permission.
🔓 Exceptions
- Tenants: everything with the landlord's permission — even painting. Unauthorised changes can be restored at your cost.
- Emergency work (a leaking pipe) may and must be stopped immediately — notify the company right after.
- The company cannot ban a proper alteration without grounds — it can only set conditions and supervise the work at the shareholder's expense.
⚠️ Penalties
An unnotified alteration can be ordered opened and restored at your own expense — you pay for the demolition and then for the renovation twice over. The real risk is electrical and plumbing work done without qualifications: it can void insurance cover, leaving you personally liable for water damage through the neighbouring flats and the whole building. An unauthorised alteration does not disappear either — it surfaces at the latest when you sell or when the next pipe renovation arrives. Supervision costs are billed to the shareholder even when the work is faultless.
📎 Sources
- Finlex · Housing Companies Act 1599/2009 (alteration work) →
- Tukes · Which electrical work may I do myself →
- Kuntaliitto · The building permit system →
❓ Frequently asked questions
Does a kitchen renovation need a notice?
Swapping cabinets and counters does not — but moving water points, wiring or the extractor hood's duct connection does. That line gets crossed far more often than the renovator expects, so check before you start.
Can I demolish a partition wall myself?
A light partition can go with an alteration notice. Touching a load-bearing wall always needs the notice, a structural engineer's calculations and often a building permit — it is not a weekend project.
Can I install a light fixture?
Swapping a fixture onto an existing ceiling connector or plug is fine, and needs no notice. Every fixed connection belongs to a qualified electrician — DIY wiring is illegal and genuinely dangerous.
Who pays for the company's supervisor?
The shareholder — the company may supervise an alteration at reasonable cost and the bill goes to the renovator. You cannot refuse the supervision, even if a qualified professional does the work and the notice was filed on time.
Can a tenant renovate the flat?
Not without the landlord's permission — not even painting is a given. An unauthorised change can be ordered restored at the tenant's cost, and the bill lands at the latest when you move out.
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