Attefall house 30 sqm – the maximum size inside a detailed plan
Inside a detailed plan a permit-free supplementary dwelling may be at most 30.0 m² with a ridge height of at most 4.0 metres. It must also be smaller than the house it complements. Our finished 18 m² house is well below the limit.
Updated
House 6 × 3 m, 18 m², kitchen and toilet. Foundation and connections not included.
When is 30 m² not allowed?
If the main building is smaller than 30 m², the supplementary house may not be as large, because it must be smaller than the building it complements. That is common on older holiday plots with small cottages.
A 30 m² house also takes two thirds of the 45 m² allowance inside a detailed plan. That leaves 15 m² for all other permit-free outbuildings.
Comparison
| 30 m² house | Our 18 m² house | |
|---|---|---|
| Share of the allowance inside a detailed plan | 67% | 40% |
| Main building must be larger than | 30 m² | 18 m² |
| Delivered in one piece by crane | Rarely | Yes |
Outside a detailed plan
In the countryside without a detailed plan the limits are 50.0 m², a 4.5 m ridge height and an allowance of 65 m². The 4.5-metre boundary distance and the neighbour-consent requirement still apply.
Think about whether you need floor area or a house on site quickly. Read about the turnkey cabin.
Sources (in Swedish): Boverket – komplementbostadshus