Building permit is now the construction permit – application process and requirements 2026

The building permit – now officially the construction permit (rakentamislupa) – is granted by the municipal building control authority, and construction may not begin without it. Finland's Building Act (rakentamislaki, 751/2023), in force from 2025, merged the old permit types: the building permit, the action permit and the notification procedure all disappeared. What remains is a single construction permit, plus the option of first applying for a separate siting permit.

When is a construction permit required?

Under section 42 of the Building Act, a permit is required at least for:

• Any residential building, regardless of size – including a small holiday home
• Any other building of at least 30 m² or 120 m³
• A free-standing canopy of at least 50 m²
• A public structure that at least 5 people can use at the same time
• Any energy well, and any mast or chimney at least 30 m high

A municipal building ordinance can extend the permit requirement to projects with more than minor impact, but it cannot demand a permit for a building the law has declared permit-exempt.

How does the application process work?

The application is filed electronically, in most municipalities through Lupapiste.fi, and needs a named principal designer. The process typically runs: a preliminary meeting with building control, preparation of the plans, consultation of the neighbours, filing with attachments, processing and decision. The decision is announced by public notice, the appeal period is 30 days, and the permit becomes final about 37 days after the decision. Processing times vary: a couple of weeks in small municipalities, up to six months in growth centres.

Two-stage application is new: you can first apply for a siting permit, which settles whether the building can be located as intended – on a planning-need area, for example – and only then the implementation stage. The separate planning-need decision no longer exists. The two-stage route suits situations where you want certainty about the building site before paying for expensive design work.

New for 2026: the three-month processing-time guarantee

From 2026, the municipality must decide the permit within three months of a complete application; exceptionally large and clean-transition projects get six months. If delay is not attributable to the applicant, 20% of the permit fee is refunded for each commencing month. Note the wording: the clock starts only once the application is complete, and missing attachments are the commonest reason processing drags on.

Which attachments does the application need?

• Main drawings: a site plan at 1:200 or 1:500, plus floor plans, sections and elevations at 1:100
• Proof of possession of the building site – the deed of sale or lease agreement
• An energy report and a moisture management report
• A ground investigation and foundation recommendation report
• Neighbour consultations, plus designer and site manager notifications

From the start of 2026, plans are submitted as a building information model or in another machine-readable format. The climate report and carbon footprint limit values came into force at the same time, but detached and other single-family houses are excluded from the climate report obligation.

What does a construction permit cost?

Permit fees are municipal: in Ikaalinen a construction permit costs €300 plus €2/m². For a detached house the fee is typically a few hundred euros – small next to design costs, but the delay compensation is calculated on it.

What happens after the permit?

The permit is not the end but the beginning. Municipal inspections on a small-house site: a kick-off meeting before work starts, attended by the builder, the principal designer, the responsible site manager and building control; a frame-stage inspection; a commissioning inspection, after which you may move in; and a final inspection once the project is complete. Work-stage inspections have shifted to the responsible site manager, who remains compulsory in a small-house project.

Practical tips for a smooth permit process

• Book a preliminary meeting with building control before design work begins
• File the application complete in one go – the processing guarantee does not protect a deficient application
• Handle the neighbour consultations yourself in advance; it speeds up processing
• A house-package supplier, such as a log-house factory, usually provides the permit drawings – confirm who handles the other attachments
• Do not start work before the permit is final

A realistic allowance for design and the permit is one to six months before the first scoop of the excavator.

The permit process is not a mere formality. It forces you to plan the project through to the end before work starts – and careful planning is the cheapest way to avoid mistakes on site.

• The building permit and action permit disappeared on 1 January 2025 – there is now one permit, the construction permit.
• A permit is always required for a residential building, for other buildings of at least 30 m² or 120 m³, and for 50 m² canopies.
• From the start of 2026, permits must be decided within 3 months – delays refund 20% of the permit fee per month.
• Applications are filed electronically, and from 2026 plans are submitted in machine-readable format.
• The appeal period is 30 days; the permit becomes final about 37 days after the decision.
• The permit fee is municipal, for example €300 + €2/m² – typically a few hundred euros for a detached house.