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Terrace Design and Cost Estimation: Key Things to Know Before You Start

Designing a terrace is often one of the key steps in creating a garden. Whether it is a wooden, natural stone, klinker, or concrete terrace, it is essential to understand the basics of composition and estimation to accurately anticipate costs and successfully complete your project. Here is a practical guide to help you gain clarity.

Plan the major steps

First and foremost, you need to define the location, size, and use of your terrace: dining area, relaxation zone, technical space… This reflection will allow you to choose the appropriate materials, plan for the passage of necessary cables or pipes, and correctly size the structure.

Evaluate the materials

The choice of material directly impacts the budget, maintenance, and lifespan of the terrace.

  • Natural stone (sandstone, blue stone, granite): aesthetic and durable, but often more expensive.
  • Bricks or concrete pavers: robust, versatile, with an interesting quality/price ratio.
  • Wood or composite: warm, suitable for modern settings, but requiring specific maintenance depending on the type.
  • Smooth or exposed aggregate concrete: very contemporary, sturdy and easy to maintain.

Comparing these materials allows you to customise the terrace to your desires and budget.

Take into account the foundation layers

A terrace is not limited to its visible surface. Beneath the surface, it is essential to plan for:

  • a foundation layer (gravel, crushed) to stabilise the structure,
  • a bedding layer (sand, stabilised or mortar depending on the material),
  • and a drainage system to prevent issues with damp or heaving due to frost.

These elements represent a significant part of the overall budget, but they ensure the stability and longevity of the terrace.

Calculate the quantities

Accurately estimating the volumes of sand, gravel, or the number of paving stones is essential to avoid costly surpluses or, conversely, shortages during the project. A precise calculation is based on the total area and the thickness of the different layers. In case of doubt, it is better to allow for a small additional margin.

Plan and order materials

Once the choices have been made, it is advisable to plan the site and order the materials in advance. Some natural stones or specific slabs may have significant delivery times. Similarly, organising the delivery according to the installation schedule avoids unnecessary storage costs.

Integrate the workforce and the unforeseen

The estimate should include not only the cost of materials but also the labour. Installing a terrace requires precise skills: levelling, joints, cutting... It is recommended to hire a professional to ensure an aesthetic and durable result. Finally, allow for a budget margin for unforeseen circumstances (site conditions, technical adjustments).

In summary, the price of a terrace

The composition and estimation of a terrace rely on several key elements: choice of materials, preparation of the foundations, calculation of quantities, and organisation of the site. Well prepared, this step will help you avoid unpleasant surprises and allow you to enjoy a solid, aesthetic, and durable terrace.

👉 If you would like personalised support for the design and construction of your terrace, our team will advise you and provide a clear and detailed estimate, tailored to your needs and budget.

Terrasse & extérieur : votre oasis face au réchauffement climatique