Home extensions can take many forms and can be used for any purpose depending on your needs, from a simple porch extension or conservatory to a complex multi-storey extension used for a garage, utility, kitchen, living and dining room.
Porches are typically small extensions to the front of a house although they can be much larger and can be built to the side or to the rear of a house. They are generally simple structures of only brick dwarf walls and columns, windows and a door. They can be plastered or left as bare brick and generally have a light and possibly an electric socket.Most porches do not require planning permission due to their size. Typical costs for a porch build start at around €2,000.
Fairly simple conservatory structures are usually made of uPVC, although they can be timber or aluminium. Some conservatories require planning permission depending on the height and surface area. The costs of a conservatory installation starts at around €3,000.
Single storey extension
Single storey extensions are simply an extension built onto a part of the house whereby one side (or more) of the extension adjoins the property and there is only the ground floor plus any basement built to it.
The main considerations here is the size of the extension and its impact upon neighbours holding. It is important to consider how the roof design will work with the existing building and specifically whether the same type of roof covering of the existing property can be used on the extension. Positions of flues, drains and excavations must all be considered. In some instances planning permission will not be required for single storey extensions. Typical build costs start around €5,000 for a basic project .
Two storey or multi-storey extension
A multi-storey extension can like a single storey extension be built to any part of the existing building. Most projects of this type will require planning permission. Typical costings start at €20,000.
In most attic conversions planning permission is not required once there is no alteration of the roof line and the velux windows are on the back of the house. These types of attics are most common and are classed on paper as a storage area, although most likely they are used as spare bedroom or study. Putting a dormer in the attic space allows for more head room (where the roof is coming down to the eves) and planning permission is required as it involves an alteration to the existing roofline. Typical costings for an attic conversion start at €10,000 but average around €25,000 for a good specification build.