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If you are creating a terrace, an administrative authorization may be required.

Terrace area

A terrace of less than 20m²

A preliminary declaration can be requested if you occupy an area of ​​less than 20m²

A terrace of more than 20m²

A building permit is requested if the surface of the terrace exceeds 20m²


Note:

Since October 2007, the installation height of the terrace is no longer taken into account.
Similarly, if you cover an existing terrace, these steps are useless.

Local planning and co-ownership regulations

Some local planning regulations may impose a maximum footprint, setbacks relative to the boundaries and even some materials. Check with the town hall before starting work.
Similarly, be sure to identify a possible subdivision or co-ownership by-law.

Calculation of the land use coefficient

The surface of a terrace is not included in the calculation of the land use factor (COS) because it is not a SHON (net floor area) but a SHOB (gross floor area) ).

Install a terrace: regulations

FAQ - 💬

❓ How to install a terrace garden in Your House?

👉 How to Install a Terrace Garden. 1 Step 1 - Know Your Building Codes and Surroundings. Contact your local authorities to find out if there are any utility wires nearby or hidden beneath ... 2 Step 2 - Measure and Plot Individual Terraces. 3 Step 3 - Dampen Soil. 4 Step 4 - Dig the Horizontal Base. 5 Step 5 - Place Your Walls. More items

❓ Can I install a roof terrace on a flat roof?

👉 As a rule of thumb, you can apply a load-bearing capacity starting at 250 kg per square metre. A roof that can bear a limited load is not immediately No-Go. You can install a roof terrace on virtually any flat roof.

❓ Do I need planning permission for a terrace with no railing?

👉 The terrace has been continued to be used as a roof terrace with no railing since. Because the roof has been used for 4 years, we understand that this can no longer be disputed for a lack of planning permission, however it has no building regulations.

❓ Are terrace walls covered by building codes?

👉 Many areas have building codes specifically pertaining to terraces and walls. If your terrace walls are considerably large, their construction must be reviewed by an expert to ensure the walls can stand up to water pressure in the soil, have proper drainage, and are safely incorporated with the rest of the hillside.


Video Instruction: Constructing a Suspended Floor to Building Regs