BR18 Guidance on Building Rights and Holistic Assessment – Danish Building Regulations Chapters 8, 20, and 23
This guidance is the official interpretative document for the settlement-regulating provisions of the Danish Building Regulations 2018 (BR18). It was issued by the Danish Transport, Construction and Housing Authority (Trafik-, Bygge- og Boligstyrelsen) in July 2020, with this first revision released in February 2021. The document provides the administrative framework for municipal caseworkers, consultants, and building owners following the 2018 regulatory shift, where municipalities ceased evaluating technical solutions while retaining the mandate to assess settlement-regulating provisions under Chapters 8, 20, and 23.
The scope of the document encompasses three primary regulatory domains. Chapter 8 defines the legal entitlement to build (Byggeret) and the conditions for a holistic assessment (Helhedsvurdering). Chapter 20 governs unbuilt areas surrounding buildings, including waste storage and parking. Chapter 23 establishes the standardized calculation rules (Beregningsregler) for floor area and plot sizes. The guidance applies to various residential categories, including detached single-family houses, two-family houses with horizontal apartment divisions, semi-detached houses, and summer houses. It explicitly details the application of Bebyggelsesprocent (floor area ratio), Højdegrænseplan (height limit planes), and Skelbræmme (boundary strips).
The text provides specific legal interpretations of individual paragraphs within BR18, clarifying the hierarchy between municipal local plans (lokalplaner) and national building codes. It details the technical standards required for obtaining a building permit when a project falls outside the standard building right framework. The following sections outline the specific rules for distances, heights, and area calculations as defined in the February 2021 revision.
Building Right and Local Plan Hierarchy
The relationship between BR18 and local planning documents is governed by § 166 and § 167. Where a local plan (lokalplan), town planning by-law (byplanvedtægt), or regulation plan (reguleringsplan) sets specific provisions for heights, distances, or floor area ratios, these local rules supersede the general provisions of the building regulations.
- Calculation Methods: Local plans cannot alter the calculation rules established in Kapitel 23; the national standards for calculating site area and floor area must always be applied.
- Temporal Rules: The calculation rules in force at the time of the local plan's adoption serve as the basis for assessment.
- Holistic Assessment: If a project exceeds the building right regarding distances or heights not regulated by a local plan, the municipality must perform a Helhedsvurdering (holistic assessment) according to § 187.
Height Limit Planes and Boundary Distances
The building right for detached houses and summer houses is defined by specific height planes and distance requirements to ensure light, privacy, and fire safety.
- Horizontal Height Plane (§ 176): Buildings within the building right must not exceed a height of 8.5 m.
- Sloping Height Plane (§ 177): For detached houses, the building height must not exceed 1.4 times the distance to the boundary (skel) toward neighbors or paths.
- Boundary Distance (§ 179): The minimum distance to the boundary for detached and semi-detached houses is 2.5 m. For summer houses, the minimum distance is 5.0 m.
- Road Distance: As of January 1, 2021, the building right no longer includes a specific distance requirement to roads for single-family houses; such placements now require a holistic assessment under § 187.
Calculation of Floor Area and Site Size
Chapter 23 (§ 453 – 458) details how to calculate the metrics that determine the Bebyggelsesprocent (floor area ratio). This calculation involves the relationship between the Etageareal (total floor area) and the Grundens areal (site area).
- Site Area (§ 454): This includes the total area of the cadastral plots. For calculations of floor area ratio, road areas and corner truncations are included, whereas they are excluded when determining minimum lot size for building rights under § 173.
- Floor Area (§ 455): Total floor area is calculated by summing the gross area of all floors. Specific deductions apply for garages, carports, and outbuildings depending on the building category.
- Insulation Exception: External post-insulation of up to 25 cm on facades and roofs for detached houses and summer houses does not count toward the floor area or affect boundary distance calculations under § 5, stk. 1, nr. 3.
Holistic Assessment Criteria
A Helhedsvurdering is required under § 187 when a project does not fully comply with the building right provisions. The assessment is based on the general criteria outlined in § 188.
- Appropriateness: The municipality assesses if the building's volume and placement are appropriate for its intended use and the character of the surrounding area.
- Light and Privacy: Assessments must ensure satisfactory light conditions and prevent significant overlooking issues for neighboring properties.
- Technical Chapters: Although technical chapters (2-22) are not part of municipal building permit reviews, the owner must document that these requirements, such as fire access, are met to support the holistic assessment.
Frequently Asked Questions
What is the maximum building height for a house within the building right?
According to § 176, the maximum height for a building within the building right is 8.5 meters measured against the horizontal height plane.
What is the minimum distance a house must be from the neighbor's boundary?
For detached single-family houses and semi-detached houses, the minimum distance to the boundary (skel) toward neighbors and paths is 2.5 meters.
How far must a summer house be placed from the property boundary?
Pursuant to § 179, the minimum distance to the boundary for summer houses is 5.0 meters.
Does external insulation count toward the building's floor area?
External post-insulation of up to 25 cm on facades and roofs of detached houses, semi-detached houses, and summer houses is not included in the floor area calculation.
Are open balconies included in the floor area calculation?
According to § 455, open balconies are generally excluded from the floor area calculation unless they are enclosed on more than three sides or are part of a specific structural configuration.
What happens if a project exceeds the building right height or distance limits?
If a building exceeds the standard building right limits, the municipality must perform a holistic assessment (helhedsvurdering) under § 187 to decide if a building permit can be granted.
Are road areas included when calculating a plot's floor area ratio?
Yes, road areas are included in the site area (grundens areal) when calculating the bebyggelsesprocent under § 454, unlike the calculation for minimum lot size.
Can a local plan change how the floor area ratio is calculated?
No, a local plan (lokalplan) can set a different floor area ratio percentage, but it cannot change the calculation rules (beregningsregler) defined in BR18 Chapter 23.
