Open BIM Cost Estimator
Automatic cost estimates

Aim of the program

INDEX

• Aim of the program
• Details
• More information
  
  

Aim of the program

The aim of the program is to automatically estimate the execution cost of a construction project during its preliminary phases, in a simple and practical way, using a fast, efficient and precise design model, by taking into account the built surface, height of the building, and typological, construction, geographic and socioeconomic factors.

The specifications of the GSA (General Services Administration) of the USA and AIA (American Institute of Architects), indicate, depending on the phase of the project, the allowable variance in the project cost, as shown in the table below:

 

Project phase	Variance (%) according to GSA	Variance (%) according to AIA
Preliminary analysis	10	10 - 15
Draft project	7 - 10	7,5 - 12,5
Design project	5 - 7,5	5 - 10

 

Depending on how defined and developed the project is - preliminary analysis, draft project and design project -, the calculation of the execution cost of the project is more precise, and therefore, its accuracy is increased. In the case of the program, the tolerances of the deviation of the initial cost with respect to the final cost of the project, provided that the initial parameters of the project remain unchanged regarding surfaces, heights or construction properties, are summarized in the following table:

 

Project phase	Variance (%) Open BIM Cost Estimator
Preliminary analysis	≤ 12
Draft project	≤ 10
Design project	≤ 7

 

Details

• Program download, available languages...
  
  
• User license
  The permits that must be included in the user license to be able to use Open BIM Cost Estimator depend on the value of the execution cost that is calculated by the program:
  
  
  • Up to 1,000,000 €
    Users can use the program for free.
  • Up to 5,000,000 €
    The user license must include the Open BIM Cost Estimator Pro permit.
  • More that 5,000,000 €
    The user license must include the Open BIM Cost Estimator Expert permit.

 

More information

More information on Open BIM Cost Estimator can be found by clicking on the following links:

• General information


• Aim of the program


• Scope of application


• User interface


• Method used to calculate the cost of the building


• Factors contemplated during price applications (geographic, socioeconomic, typological, construction, climatic and seismic)


• Integration in the Open BIM workflow


• Results, checks and generated support documents