If you want to plan and carry out an extension, you should use ArCADia BIM 3D Architect. With this software, you can create a complete 2D floor plan even without prior knowledge, in accordance with German building standards. In addition, you can use the software to create a walk-in 3D model of your entire property, with ancillary buildings, extensions, terrace and garden.

There are many reasons why the space in your property is no longer sufficient: You may be expecting offspring for whom you would like to set up a baby room. You may need more storage space for the things you cannot part with. Maybe you want to finally set up a study or maybe you just need more space to unfold. But that doesn’t mean you have to look for another house right away. An extension is a sensible alternative to moving.

There are many varieties of cultivation. Its shape and size depend on its purpose and your wishes. Independent planning makes sense so that you can design your extension the way you imagine it. There are a few things to consider. Here you can find out which basic considerations the cultivation can ultimately be carried out on.

The base

Like all other buildings, extensions are subject to precisely defined building standards. In order to get started, certain preliminary planning must be carried out, regardless of how complex and on what scale your cultivation is to be. The theory is one thing. In practice, it often appears that an extension changes the original building structure more than is initially assumed.

The point is to plan an extension as precisely and in as much detail as possible. It is therefore necessary to have the floor plan of the building or property affected by the extension. It is the basis for planning the renovation. The entire preliminary planning is based on it.

On the basis of the floor plan, different concepts can be tried out and different variants of the extension can not only be sketched, but also visualized. If you do not have a floor plan of the original building, you should definitely create a floor plan. You can do this by hand or much more precisely and conveniently on the PC with a CAD program. Based on this floor plan, you can then make all the decisions necessary for the extension.

First of all, three basic questions need to be answered:

  • which after the place for cultivation,
  • which according to its orientation
  • and according to its size

Where exactly should the extension be located? The right place on the property can be found quickly using the floor plan. Just as quickly it can be clarified how the cultivation should be oriented. Should it be oriented sideways to the main building or should it face the garden? Would you like to add another storey to the house and make the extension a new floor? It is also possible to convert a basement room or a garage in depth. The floor plan can also be used to clarify the size of the extension and whether the desired floor area can be implemented.

The planning

When the important preliminary planning has been completed, further planning steps can now follow for the extension. There are four points that must be processed:

  • Point 1: First of all, the building permit must be checked. In Germany there is a building permit requirement. The legal building regulations must be complied with for a building project. That will be checked by the office. However, there is not a building permit requirement for every extension or conversion. It depends on the size of the building project, but also on the respective federal state and the municipality to which the property to be converted belongs. If a permit is required, it should be obtained before construction begins. Because if there should be legal problems for the realization of the construction project, these must be solved before you invest further time in a project that may not be feasible. There is the possibility of submitting a preliminary building inquiry to the responsible building supervisory authority or to the municipality. You submit all documents of your previous cultivation planning together with the preliminary inquiry to the authorities. If you get a negative decision, you can either change your building project according to the objections and submit a new, then modified building request, or you can cancel your building project altogether. If the test is positive, you can continue with your planning.
  • Point 2: The exterior and interior architecture must be planned. An extension usually changes the external shape of a building. This automatically results in a new internal structure. You need to consider what building materials to use for your cultivation. Should it correspond to the building material of the main building or possibly be completely different? Maybe it should be made of glass because the extension is a winter garden? As for the interior, you should consider which rooms will be affected by the construction work. You may need to assign new functions to these rooms. A bedroom may then become a living room with access to the winter garden. All the consequences of a major structural change must be considered.
  • Point 3: There are important decisions to be made in relation to the doors and walls of the extension. Depending on the type of extension, one or more new rooms are created that need external walls and partitions. The desired room layout must be planned precisely. Can part of the original outer wall possibly remain and be used as a new partition? If you just want to enlarge an existing room, the former outer wall must be torn down. If this is the case, it would be good to seek professional advice from a structural engineer or architect. It would be fatal if you were to remove a load-bearing wall out of ignorance. The stability of the main building must not be endangered under any circumstances. Furthermore, it should be considered whether the extension needs its own entrance or whether access should be via the main building. If you want to draw in partition walls, doors must be included in the planning.
  • Point 4: Rooms may have to be converted. The extension gives you more space. Either a room is enlarged or one or more new rooms are created. As a result, you may want to move your living room to the new winter garden, thereby freeing up the space in the former living room. What do you want to do with this space gained? Should it be converted into a children’s room or possibly a study? When you have decided how you want your new space, the preliminary planning of your construction project can be completed.

The implementation

After completing the preliminary planning, which you as the client can carry out yourself, you need a qualified architect and a construction company who can implement your specifications to carry out the project. However, you should first obtain a cost estimate from the architect, because you should not have any construction work carried out without a previous cost calculation. If you want, the architect can submit your building application to the building authorities or the municipality on your behalf. But keep in mind that every service you use has to be paid for.

If the costs of the planned cultivation exceed your financial means, you can now reconsider the various planning steps and make changes that are more cost-effective. However, if you have come to the conclusion that your budget is sufficient, nothing stands in the way of the start of construction for the extension you have planned yourself.