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Building your house: mistakes to avoid

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Building your house: mistakes to avoid

Getty Images / Leroy Merlin

From the development of the project to its implementation, build his house is a course full of pitfalls. Spot the main mistakes and browse our tips for building your home.

Building your home is often the adventure of a lifetime. Choice of land, materials or craftsmen, the project is the result of a long-term reflection and represents a long-term project. Before starting to build your house, Côté Maison reviews with two professionals to give you the most classic mistakes and gives you the keys to avoid them. With Prisca Pellerin *, architect in Ivry-sur-Seine, and Alain Mercier, construction expert at Leroy Merlin, discover the key facts to build his house.

Mistake # 1: Underestimate the budget for building his house

Main element, the budget defines the project according to the savings of the owners and their borrowing capacity. "The budget for building a house is the result of several parameters: the purchase of land, the study of the project (architect fees, soil study, study of (s) office (s) technical (s) ) for the structure, the thermal conformity ...) and its realization (site and interior architecture) ", decrypts Prisca Pellerin, architect in Ivry-sur-Seine.

If the envelope is the result of a successful reflection, the construction of a house is often full of surprises with additional costs. To avoid being caught off guard, it is better to determine an additional margin of maneuver, even if borrowing a larger sum in case of credit. Even if you face unforeseen events, you will be ready to face them. "Each project and each customer is different but to get an idea, the average budget to build his house is 2000 euros per square meter, says Prisca Pellerin.It is an indicator that can vary from single to double according to the requirements In self-construction, the budget can be less than 1000 euros per square meter.For a more luxurious house, it can reach 4000 euros per square meter and beyond! "

Read also> Building a house: good ideas

Error # 2: hastily choosing the land of your future home

First step before the construction of the house, choosing the land with care is essential for the rest of the project. A good financial opportunity, even attractive, does not necessarily meet your criteria. If the choice of terrain is often difficult, do not rush. Write down your wishes and start your research based on these expectations. "First, the land must be a favorite, to match your needs and desires, confirms Prisca Pellerin flat or steep terrain, with views, urban or natural, sunny, with or without neighbors, well located by compared to transport and shops or otherwise lost in the countryside ... The criteria are above all yours! "

Once the ground is found, it is important to gather all the necessary information on the latter to confirm his choice or not. "We must learn about the risks involved in the field: seismic zone, old quarries, caves, noise (near the road / railroads, noisy shops or requiring early morning deliveries ...), nuclear power plants / wind turbines etc, risk of flooding (source in the field, river and maritime area ...), land located near a forest, trees not to be cut, a historic building and / or a protected area ", details Prisca Pellerin.

Mistake # 3: Ignoring the soil study for the land of his future home

After the environment of the ground, it is the nature of its soil that requires attention. Depending on its composition, the foundations will not be the same. The cost either. "Start by going to the town hall to get a soil map that explains the nature of the soil: clay, stony, wet, etc. to find out what types of foundations to make," suggests Alain Mercier, construction expert at Leroy Merlin. It is also in town hall that you will find all the information concerning the building capacities of your land. Appointment at the urban planning department, to consult the POS (plan of land use) or PLU (local urban plan), specific to each municipality. A little more research is also recommended in order to have a real vision of the nature of the soil that will host your future home. "You have to do a soil study (2 or 3 holes) with an appropriate design office," advises Prisca Pellerin, "clay soil will require more expensive foundations, for example." For this - essential! envelope from 2000 to 3000 euros depending on the number of coring carried out. " In order to have all the elements in hand, a last tip, a little more friendly ... "Ask the neighborhood to know their experience," suggests Alain Mercier. They are best placed to share their experience in this environment.

Mistake # 4: Calling Craftsmen Without Inquiring

The construction team is carefully designed to build a house. Self-builder or not, the craftsmen who work in your home must be skilled and you must have echoed their accomplishments. At the risk of having bad surprises on the rendering and disappointments on the schedule. "Finding the right craftsmen is mostly the result of word of mouth," says Alain Mercier, "Some RGE qualifications (Recognized guarantor of the environment) attest that craftsmen have undergone training and are competent according to the new regulations favoring energy. renewable sources (RT 2012), not to mention that they are sometimes necessary to obtain a loan. "

Read also> RT 2012, thermal regulations 2012: all the information

After collecting this information, an appointment with the professional will allow you to establish a first contact. "To surround yourself with qualified professionals, do not hesitate to call to know a little more and make a first appointment, confirms Prisca Pellerin.Project a house with a professional requires a relationship of trust. An appointment will be an opportunity to get to know each other, to ask questions to reassure oneself and to see if you have the same way of thinking about things in order to achieve true collaboration. "

Once the project is studied and agreements in principle, transfer all the key information on paper. "A contract must be put in place, that each party signs knowingly (fees, deadlines, global budget ...), supports Prisca Pellerin.But before, check that the professional is well insured (ask for a copy of his certificate d It should be noted that if you use an architect, a master builder or a builder, you will be covered by his insurance for the company that carries out the work. "

Mistake # 5: Build your own house and underestimate your work

"Building your house is not always a good story," warns Alain Mercier. Lulled by the dream of creating one's own home, one can quickly abstract the efforts and concessions demanded by the project. "Self-building requires a lot of energy and courage," said Alain Mercier, "you have to be good in your head with real strength of mind, will and solid shoulders." Building a house is a real undertaking and a demand for to evaluate work, fatigue and time well. "

The other solution is to delegate a little and limit yourself to a few jobs. "The owner will have to keep abreast of the progress of the project through each report of the architect's site, advises Prisca Pellerin.The architect is a conductor through whom everything happens to have a centralized site management For example, paying the company directly without going through the architect is a risk because the amount charged will not be covered by the architect's insurance. work done without incident, it is above all a relationship of trust and excellent communication. "

* More about Prisca Pellerin Architecture

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