ᐅ Construction costs for a roughly 90 m² extension with a balcony to a farmhouse (shell structure)
Created on: 8 Dec 2017 12:23
J
Jannik12345J
Jannik123458 Dec 2017 12:23Good day,
We are planning to purchase an old farmhouse. Extension work (bricklaying) has already started, meaning the entrance and one room have been built. We are considering adding another floor with a bedroom, bathroom, and balcony. We would carry out the interior finishing ourselves, such as painting and flooring. The roof is already in place since it used to be a barn and is still in good condition. Gas lines still need to be installed, but they are already present in the main house. What would the rough construction costs be for approximately 90 square meters (970 square feet) including the balcony? Thanks in advance for your answers. Best regards
We are planning to purchase an old farmhouse. Extension work (bricklaying) has already started, meaning the entrance and one room have been built. We are considering adding another floor with a bedroom, bathroom, and balcony. We would carry out the interior finishing ourselves, such as painting and flooring. The roof is already in place since it used to be a barn and is still in good condition. Gas lines still need to be installed, but they are already present in the main house. What would the rough construction costs be for approximately 90 square meters (970 square feet) including the balcony? Thanks in advance for your answers. Best regards
Jannik12345 schrieb:
Extension work (bricklaying) has already started there, meaning the entrance and one room have already been built. We are planning to add another floor with a bedroom, bathroom, and balcony. You should first review the plans submitted for the building permit/planning permission to understand the intended design. The plans should also show how the heating of this extension is planned. Adding 90 m² (970 sq ft) of additional living space is unlikely to be supported by an existing heating system that was previously oversized.
How building codes for existing structures apply versus those for new builds will likely depend on the relative size of the extension compared to the original building. This largely determines the technical requirements and, ultimately, the level of effort and cost involved. Simply relying on enthusiasm and help from friends is no longer sufficient under current regulations.
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You should immediately engage the consulting and planning services of an architect, whom you will need anyway for the preliminary building inquiry and the building permit application. It is essential to clarify first whether and to what extent you are legally allowed to extend or build according to building and planning regulations.
Even if you plan to convert a barn/stable, the attic, or other outbuildings into residential use, this constitutes a change of use that requires a building permit and must generally be checked for approval.
I would not overvalue the existing shell construction. The likelihood that it was built without a building permit is relatively high. Even if it has a building permit, this does not necessarily mean that a structural engineering assessment exists. Such an assessment could reveal, for example, that the foundation of the shell was not designed for an additional storey. As a rule, these unfinished projects are better demolished. This saves you from the complicated process of dealing with a building structure that may have been started with a completely different design approach, which does not fit your own plans at all.
Even if you plan to convert a barn/stable, the attic, or other outbuildings into residential use, this constitutes a change of use that requires a building permit and must generally be checked for approval.
I would not overvalue the existing shell construction. The likelihood that it was built without a building permit is relatively high. Even if it has a building permit, this does not necessarily mean that a structural engineering assessment exists. Such an assessment could reveal, for example, that the foundation of the shell was not designed for an additional storey. As a rule, these unfinished projects are better demolished. This saves you from the complicated process of dealing with a building structure that may have been started with a completely different design approach, which does not fit your own plans at all.