Extension of buildings

The extension of buildings in general follows the same phases as a new building.

Previous study
It constitutes the preliminary phase in which the ideas that develop the assignment are expressed in an elementary and schematic way, by means of sketches or drawings, at scale or without it. It includes the collection and systematization of the precise information, the approach of the technical program of needs, and an indicative estimate of the economic cost (estimation based on modules) that allow the client to adopt an initial decision.
The previous study differs from the preliminary project, in that its contents are elementary and appreciative, developing the needs program and analyzing the previous information, which, like the program, must be facilitated by the promoter.
The cost estimate can be global, based on experiences of similar jobs.

Draft project
It is the phase of the work in which the fundamental aspects of the general characteristics of the work are exposed: functional, formal, constructive and economic, in order to provide a first global image. It must be understood that this concept is different, and much less detailed than that which corresponds to a Basic Project and is limited to establishing a budget advance with an estimate based on modules, by application of global surfaces. It differs from the previous phase in the availability of surfaces closer to reality, although still imprecise, by having a measurement based on a graphic documentation at scale, but without delimiting.

Basic project
It is the phase of work in which the general characteristics of the work are defined precisely by adopting and justifying concrete solutions. Its content is sufficient to request the municipal license or other administrative authorizations, but insufficient to carry out the construction.

Execution project
It is the phase of the work that develops the basic project, with the complete determination of details and specifications of all the materials, elements, constructive systems and equipment, and can be carried out in its entirety, before the beginning of the work, or partially, before and during the execution of it. Its regulatory content is sufficient to obtain the necessary collegiate visa to start the works.
It does not include other partial or complementary projects that may be required, but not of the competence of the architect, such as Telecommunications projects, and Elevators, or other works, which, although they are the responsibility of the architect, are not part of the projects. building projects, such as safety and health studies or basic studies of safety and health, decoration, design or choice of furniture, gardening, and in general any work that has the status of complementary and independent of the project of the building.
The execution project can be made up of partial projects carried out by other professionals and coordinated by the architect, according to point 2 of the Statement of Motives, article 4.2 and article 10.1 of the LOE.

Construction management
In accordance with the provisions of article 12 of the Law 38/1999 on the Regulation of Building, the construction manager is the agent who, as part of the facultative direction, directs the development of the work in the technical, aesthetic, urbanistic aspects and environmental, in accordance with the project that defines it, the building license and other mandatory authorizations and / or the conditions of the contract, to ensure its adequacy to the proposed purpose.
Other technicians, legally competent, may direct the works of the partial projects, under the coordination of the architect director of the work, in accordance with article 17.7 of the LOE.

Settlement of the work
In this phase the determination of the final economic state of the work is carried out by applying the prices that govern it according to the real state of measurements of the items that comprise it, provided by the director of the execution of the work.
The Director of the work is responsible for the partial certifications and final liquidation of the work units executed with the required visas.

Other considerations

Depending on the type of work the basic project and the executive project are merged into one, writing a single document called basic and executive project.

In the work phase, the intervention of the director of the execution of the work will also be necessary, the exclusive competence of a rigger, technical architect or construction engineer, according to the LOE.

In addition, other documents, such as the basic safety study or safety study and the intervention of a safety and health coordinator, will be necessary. Depending on the type of work, other technicians may be required.