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surface de plancher · SDP

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n. f. · floor area (planning) · gross floor area (GFA, approx.)

Definition

FR
Surface de référence en urbanisme depuis 2012 : somme des surfaces de plancher closes et couvertes de chaque niveau, mesurées à l'intérieur des façades (au nu intérieur). On en déduit notamment les trémies, les surfaces sous une hauteur de plafond inférieure à 1,80 m et certaines surfaces techniques, comme le stationnement.
EN
The reference area in planning since 2012: the sum of the enclosed and covered floor areas of each level, measured inside the façades (at the nu intérieur). Deductions include openings in floors, areas under a ceiling height of less than 1.80 m, and some technical areas such as parking.

Diagram

surface de plancherfloor area (planning)trémieexcludedmesurée au nu intérieur des façadesmeasured at the inside face of the façades1,80 mnon comptéeexcludedcomptéecountedCOUPE · SECTIONPLAN
Plan of a level: the floor area is measured at the inside face of the façades; floor openings are excluded.

Example sentences

Written (email, official document)

FRLe projet crée 320 m² de surface de plancher, répartis sur quatre niveaux.

ENThe project creates 320 m² of floor area, spread over four levels.

Spoken (standard)

FRRetire la trémie du calcul, elle ne compte pas dans la surface de plancher.

ENTake the opening out of the calculation, it doesn't count in the floor area.

Spoken (informal)

FREn SDP on est bon, mais le promoteur voudrait déjà un étage de plus.

ENOn floor area we're fine, but the developer already wants one more floor.

Nuances and pitfalls

Surface de plancher (n. f.), emprise au sol, surface habitable. The surface de plancher is used for planning rules; the emprise au sol (n. f.) is the projection of the building on the plot; the surface habitable (n. f.) is used for renting and selling a dwelling. The three values differ.

SHON and SHOB. Before 2012, the surface hors œuvre nette (SHON) and surface hors œuvre brute (SHOB) were used. They still appear in older documents.

Related terms

permis de construiregabaritnu

Regulatory and standard references

France
US
UK
Code de l'urbanisme, art. R111-22 (surface de plancher)? Not verified

Legislation in force may differ from what is shown here.

Validation

Reviewed by Raphaël B. · 8 Oct 2026

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