Cost estimate

from Wikipedia, the free encyclopedia

In the cost estimate ( english cost estimate ) according to DIN 276 - Costs in construction - the "cost based on the will preplanning " determined. The cost estimate thus provides a basis for the decision on whether to continue the preliminary planning for the draft planning (see service phases according to HOAI ).

It is based in particular on the graphic representations and other planning documents of the preliminary planning. From this, “quantities to be built” can be determined. The gross volume [m³ BRI] is of particular importance . Using cost key figures [€ / m³ BRI] from comparable projects, the costs for the new project can then be estimated. In the case of the key cost figures, specific features (e.g. location, development, quality standard) must be taken into account.

According to DIN 276: 2018-12, the cost estimate must be divided into at least 7 cost groups up to the 2nd level of the cost breakdown. In the previous version (DIN 276-1: 2008-12) only a depth up to the first level was required.

Extract from ÖNORM B 1801-1 , which concerns the cost target cost estimate:

  • Phase: preliminary design phase
  • Objective: Specification of costs for cost calculation and as cost control
  • Basics: Preliminary draft planning with information on types of use and areas of use with information on quantities (e.g. number of rooms, areas, room contents)
  • Structure: planning-oriented - rough element and execution-oriented - cost area