DIN 277:2021-08

Standardized determination of floor areas and volumes in building construction

DIN 277 specifies terms, definitions and rules for the determination of floor areas and volumes in building construction. It provides a standardized basis for determining areas and volumes during the planning, construction and use of buildings and supports the comparability of structures, plots of land, and cost and area indicators.

What is DIN 277 about?

The standard defines the system for the determination of floor areas, volumes and plot areas in building construction. It focuses on the terms gross floor area (GFA), net room area (NRA), construction floor area (CFA), gross volume (GV) and net volume (NV), as well as their classification and calculation. In addition, the standard describes rules for different uses, storeys, types of enclosure and plot areas.

Topics covered

• Floor areas and volumes in building construction
• Gross floor area (GFA), net room area (NRA) and construction floor area (CFA)
• Gross volume (GV), net volume (NV) and construction volume (CV)
• Usable, technical service and circulation areas
• Types of use and area classifications
• Determination of plot areas and built-up and unbuilt areas
• Determination of areas by storey and type of enclosure
• Basis for cost and use calculations in accordance with DIN 276 and DIN 18960

Practical relevance

DIN 277 is one of the most important standards in building construction. It enables the standardized and transparent determination of areas and provides the basis for cost calculations, area comparisons, economic assessments and building documentation.

The clear definitions of GFA, NRA, CFA, GV and NV are particularly relevant, as these indicators are regularly used in planning, tendering, project management, real estate and facility management. The standard ensures that areas and volumes are determined consistently and presented in a comparable manner.

Changes compared with DIN 277-1:2016-01

The 2021 edition was revised and restructured as a standalone standard for building construction. The most important changes include:

• Restriction of the scope to building construction
• Revision and expansion of terms and definitions
• Clarification of the allocation of floor areas within structures
• Inclusion of provisions for rooms whose intended use has not yet been defined
• Expansion and clarification of the rules for determining floor areas and volumes
• Editorial revision of the document

Target audience

• Architects
• Civil engineers
• Specialist planners
• Project managers
• Real estate and facility management professionals
• Experts and assessors
• Building owners and public-sector clients
• Cost planning and area management professionals

Conclusion

DIN 277 provides the central basis for the determination of floor areas and volumes in building construction. With its clear definitions and classification rules, it supports standardized area calculation and provides the basis for planning, cost management, building valuation and the real estate industry.

This document replaces DIN 277-1:2016-01 .