What Is Home Extension? Things To Know

Expanding your home with an extension to accommodate a bedroom, living room or bathroom is the solution to bring added value to your home in case of resale, but also save you the throes of a move. To envisage this work requires a good reflection upstream as well financial as architectural. Without forgetting to submit to the necessary administrative procedures and other constraints of town planning. Here are all our tips to enlarge the house by type of room.

Too small. This is obviously how everything starts. It’s all the essence of an extension project. Whether you’re already a homeowner or a potential buyer, you need at least one more room or more volume, whether you live in town or in the country, an extension project always responds to the same objective: increase the surface to live.

In which case opt for a house extension?

“We could change houses,” some say. But when it is ideally located, perfectly oriented, that it corresponds to the house of our dreams and that only its surface is a problem? Worse still, when one is attached to the premises and a move would be a tear? Not to mention the hassle inherent in the case: cartons, the sale of his property, bridge loans to the bank, appointments at the notary…

In short, if it’s just a story of place, we must remember that a house is rarely permanently fixed and that in most configurations, there will be solutions to increase the surface to live.

Some are easier to implement than others and this will play in particular on the cost of the operation. From the simple development of attic to the elevation, the addition of surface to live will not have the same price per m2.

In addition, if you are looking for Stevenage builders it should be known that the construction of an extension responds to a complicated financial equation: the smaller the extension, the more it is expensive per m2, but the less m2 is built and the lower the total bill. You follow? Basically, building 10m2 still costs less than having 30, but not m2, because construction involves fixed costs, regardless of the size of the operation.

However, in an uncertain real estate market, this solution more and more acclaimed by the owners. Rather than jeopardize their heritage, it’s an immediate way to value it.

What is a home extension?

By definition, an extension is a construction added to another, the outgrowth of an already existing building. The context is therefore particularly important because it involves implementing the project in an even more marked environment than for a new construction. From an architectural point of view, we can take the party to respect or break with the existing style, according to his tastes and urban and technical possibilities. But for locals, it is imperative that an extension is consistent with the rest of the housing. It is about living this new space as the logical extension of the rest of the housing. This implies certain layout precautions (such as the continuity of paints and floor coverings) to ensure a certain homogeneity inside.

Good news, since 1st January 2012, the area subject to planning permission for extensions has increased from 20 to 40m2. An extension project of 39m2 is, therefore, today the subject of a simple declaration of work in the town hall. It is therefore quite simple to implement it, as long as it respects the local rules of urban planning (materials, colors, the height of construction).

On the other hand, regardless of its size, since the extension brings the total surface (SHOB) of your house to more than 170m2, not only the building permit is obligatory and recourse to an architect is obligatory.

The contiguous extension is the most frequently used constructive solution, as long as we have sufficient ground to implement it. It allows to extend the house quite easily and can be envisaged on one level or with a stage to be wedged on existing heights.

It usually involves creating or modifying the openings to ensure the inner connection between the new and the old volume. According to the margin of freedom left by the Local Plan of Urbanism (PLU), one will be able to choose to stick to the existing architectural framework or to stand out from it.

An example of a side house extension

The intervention consisted of bringing together two terraced houses in one dwelling. The extension at the back of the two houses serves as a link between the two buildings. Styled like a large living room, the ground floor opens onto the back garden and now consists of a kitchen center around which revolve a lounge and a dining room.

After the work, the living space of the house went from 250 to 280m2. The cost of the intervention is 350 000 $, but it includes both the construction of the extension and the total renovation of the two terraced houses.

This radical solution is, however, more and more often implemented in cities, where urban density requires turning to the sky to gain living space. The elevation is to add one or more levels to an existing build.

Obviously quite expensive because it assumes access difficulties, either by its height or simply by the storage constraints of materials such as work equipment. It also implies certain precautions of implementation, in particular, to make sure that the existing construction is strong enough to support an elevation, and if necessary to provide a reinforcement of foundations. In any case, it is also important to ensure the lightness of the new structure, which is why most of the elevations are made of wood framing.

An example of a home extension by elevation

In this project the architect has completely deconstructed the sloped roof of this old artisan workshop, to build a real extra floor. A cube of 50m2 covered with zinc in which is arranged a parental suite. Slightly removed from the first two levels, the project has resulted in a pleasant balcony along the new structure. Realized in a few months, the works also included the complete renovation of this house finally invested by the owners in the summer of 2012. If the whole site was 370 000 $, the work of elevation is 150 000 S.

Rarer, this technique of digging into the foundations of a house to gain volume is aimed at very specific configurations. It is not a question of going to build whole galleries in the belly of the ground, but more often, to gain some tens of cm in height to make habitable a basement hitherto too narrow. For a cost-effective home construction, you can hire services of this construction company in Stevenage  https://www.buildersinstevenage.co.uk/  However, the transformation of a cellar or a technical room into a living room involves providing a source of natural light, which is why this solution is particularly relevant for semi-buried basements.

It is not so complicated to implement, as long as it does not weaken the foundations and may even be an opportunity to strengthen them.

An example of a home extension by excavation

In this project, a 294m2 house has not only been completely renovated but also a surface enlargement of 40m2. If the works provided for a small extension on the garden, they also consisted of an excavation of the semi-buried underground to make it habitable. A guest room and its independent bathroom are now converted in place of the old cellar. Completed in just six months, all of this renovation and expansion cost $ 182,000.