Boverkets byggregler (BBR) – Swedish National Building Regulations
Boverkets byggregler, commonly referred to as BBR, is a set of mandatory provisions and general recommendations issued by Boverket (the Swedish National Board of Housing, Building and Planning). This consolidated version integrates the original BFS 2011:6 regulations with all subsequent amendments up to and including BFS 2020:4. These regulations derive their legal authority from the Planning and Building Act (Plan- och bygglagen, PBL) and the Planning and Building Ordinance (Plan- och byggförordningen, PBF).
The document governs technical requirements for the construction of new buildings and the alteration of existing structures. It covers critical regulatory domains including accessibility, housing design, fire protection, hygiene, health, and environment, safety in use, and energy conservation. The regulations are structured into nine main chapters, with significant technical sections detailing building classifications such as Building Classes Br0 to Br3, specific dimensions for wheelchair maneuverability, and energy performance metrics like the primary energy number (primärenergital).
The following sections provide structured data on the technical standards for structural safety, environmental health, and energy efficiency required within the Swedish construction sector.
Scope and Alterations
Section 1 defines the application of the regulations to the construction of new buildings, site works, and demolition. It also specifies requirements for the alteration of existing buildings, which includes renovations and additions.
- Section 1:21: Municipal building committees may grant minor deviations if there are special reasons and the project remains technically satisfactory.
- Section 1:22: Alterations must adhere to requirements for caution (varsamhet) and must not result in the distortion of culturally valuable buildings.
- Part 1:2242: A 'significant renewal' occurs when an alteration involves substantial economic investment or major changes to the floor plan and building frame.
Accessibility and Housing Design
Section 3 outlines the requirements for making buildings and plots accessible to persons with reduced mobility or orientation capacity.
- Maneuvering space: A turning circle of 1.50 meters is required for outdoor wheelchairs, while 1.30 meters is permitted within individual dwellings.
- Section 3:3111: The minimum ceiling height in dwellings must be 2.40 meters, though 2.30 meters is acceptable in basements or attic floors of small houses.
- Section 3:22: Dwellings must include defined spaces for hygiene, sleep, social interaction, cooking, and storage, with at least one room having direct access to daylight.
Fire Protection and Building Classes
Section 5 categorizes buildings into classes based on their fire protection needs and details evacuation requirements and structural fire resistance.
- Building Class Br0: Required for buildings with more than 16 floors or those with very high fire safety needs, requiring analytical design.
- Building Class Br1: Standard for buildings with three or more floors or high-risk occupancy like hospitals.
- Building Class Br2 and Br3: Applied to buildings with moderate to low fire protection needs.
- Section 5:331: Maximum walking distances to the nearest exit range from 15 to 60 meters depending on the occupancy class and presence of automatic sprinklers.
Hygiene, Health, and Environment
Section 6 focuses on indoor air quality, moisture control, and the prevention of hazardous substance accumulation.
- Section 6:23: The annual average concentration of radon in indoor air must not exceed 200 Bq/m³.
- Section 6:251: Residential ventilation must maintain a minimum outdoor air flow of 0.35 l/s per m² of floor area.
- Section 6:52: Moisture conditions must be controlled to prevent the growth of mold or bacteria, typically using a 75% relative humidity threshold for sensitive materials.
Energy Conservation
Section 9 regulates the energy performance of buildings, focusing on heat loss, cooling needs, and efficient electrical use.
- Section 9:2: Buildings must meet specific primary energy numbers (EPpet) determined by energy carrier weighting factors and geographic location.
- Table 9:92: Target U-values for alterations include 0.13 for roofs, 0.18 for walls, and 1.2 for windows.
- Section 9:7: Buildings must be equipped with measuring systems to continuously monitor energy consumption.
Frequently Asked Questions
What is the minimum ceiling height for a new apartment in Sweden?
According to Section 3:3111, the standard minimum ceiling height is 2.40 meters, though it can be reduced to 2.30 meters in certain attic or basement areas.
What is the maximum allowed radon level in Swedish buildings according to BBR?
Section 6:23 states that the annual average concentration of radon in indoor air must not exceed 200 Bq/m³.
How is a building's fire safety class determined?
Buildings are classified from Br0 to Br3 under Section 5:22 based on the number of floors, occupancy type, and the complexity of evacuation requirements.
What is the required ventilation flow rate for residential buildings?
Section 6:251 requires a minimum outdoor air flow of 0.35 l/s per square meter of floor area for dwellings.
Are there specific turning space requirements for wheelchairs in Swedish homes?
Yes, Section 3:113 specifies that a turning circle with a diameter of 1.30 meters is the design standard for wheelchairs inside individual dwellings.
What energy performance metric does BBR use?
BBR uses the primary energy number (primärenergital, EPpet), which accounts for the building's energy use corrected for geographic location and energy source weighting factors.
When is a lift mandatory in a residential building?
Section 3:144 indicates that lifts are required in residential buildings with more than two floors, and additional requirements apply for buildings with more than ten floors.
