byggnummer

Byggnummer is a term used in several Nordic countries to denote a unique administrative identifier assigned to a construction project or building during planning and construction processes. It is not a street address, but a reference number used across documents, plans, and systems by developers, contractors, utilities, and authorities to track a project.

Usage and purpose: When a development application or building permit is filed with a municipality, a byggnummer is created to follow the project through approvals, drawings, inspections, and invoicing. The number helps coordinate planning reviews, permit decisions, and utility connections. It is often provisional and may be adjusted as the project evolves or as records are updated.

Relation to property identification: Upon completion, a project may receive a formal property designation (for example, a fastighetsbeteckning) and a street address. The byggnummer may be retained in historical records or discontinued depending on local practice. In multi-unit or phased developments, individual sections or units may also have their own byggnummer for internal tracking of construction stages.

Variations and scope: The exact format, authority responsible for issuance, and the lifecycle of a byggnummer vary by country and municipality. While common in Nordic planning and construction contexts, there is no universal standard, and the term’s use may differ outside these regions.