Mandatory Parking Space Requirements: PLU Calculation in Nice

Calculating required parking spaces under the Nice PLU

Filing a building permit in Nice requires compliance with the parking obligations set out in the local urban plan (PLU). Article 12 of each zone’s regulations (UA, UB, UC, UD, etc.) sets the minimum number of spaces required depending on the project’s use (housing, retail, offices) and floor area. A project that falls short of these ratios exposes the applicant to a permit refusal or, if construction has already taken place, to a later challenge from the authorities or third parties.

This article sets out the calculation method that applies to construction projects or renovations involving a change of use, the dimensional standards that must be met, and the remedies available in the event of a refusal based on non-compliance with parking requirements.

Applicable ratios under the Nice PLU

The Nice PLU regulations, available on the city’s website or at the town hall, specify the parking ratios for each zone. The provisions vary by sector, but the general principles are organised around the following categories:

Housing

• New buildings must comply with a minimum ratio. In many zones of the Nice PLU, this ratio is one space per dwelling under 60 m² of floor area, 1.5 spaces per dwelling between 60 and 100 m², and 2 spaces above 100 m². Where the result is a decimal figure, it is rounded up to the next whole number, unless the zone’s regulations state otherwise.
• Visitor spaces, often overlooked in initial calculations, are generally required at a rate of one space per five dwellings. These spaces are added on top of private spaces.

Offices

The standard ratio is one space per 50 m² of office floor area. Certain central sectors located less than 500 metres from a major public transport stop (tramway, train station) may qualify for a 20 to 30% reduction if the permit application justifies it explicitly.

Retail

For sales floor area, the applicable ratio is generally one space per 30 m². Sectors with high commercial density, particularly in zone UA (city centre), may have specific rules or regulated exemptions.

It is essential to consult Article 12 of the regulations applicable to the plot in question, available on the City of Nice website (Local Urban Plans section) or at the town hall: the ratios above correspond to the most commonly encountered provisions, but each zone has its own rules, and Article 12 always takes precedence over any general indication.

Dimensional standards: the NF P 91-120 standard

Complying with the required number of spaces is not enough: each space must also meet the minimum dimensions set by the NF P 91-120 standard, the technical reference for sizing parking spaces, whether in a structure or on the surface.

• Standard space: 5.00 m long × 2.50 m wide.
• Space for people with reduced mobility (PRM): 3.30 m wide, with a 0.80 m transfer strip kept clear of any obstacle.
• Clearance and circulation: driving lanes must allow vehicles to enter and exit without encroaching on neighbouring spaces.

A space drawn at 2.30 m wide, even if the total number is correct, makes the project non-compliant. Planning authorities check these dimensions on the site plan; any discrepancy exposes the application to an unfavourable opinion from the municipality or, if the permit is granted despite the error, to a third-party challenge.

Calculation method: a worked example

Take the example of a project in zone UB comprising five dwellings, with respective floor areas of 55 m², 70 m², 85 m², 95 m² and 110 m².

Step 1: calculating private spaces

• Dwelling 1 (55 m²): 1 space (under 60 m²).
• Dwelling 2 (70 m²): 1.5 spaces (between 60 and 100 m²).
• Dwelling 3 (85 m²): 1.5 spaces (between 60 and 100 m²).
• Dwelling 4 (95 m²): 1.5 spaces (between 60 and 100 m²).
• Dwelling 5 (110 m²): 2 spaces (over 100 m²).

Subtotal: 1 + 1.5 + 1.5 + 1.5 + 2 = 7.5 spaces. Rounded up: 8 spaces.

Step 2: adding visitor spaces

Five dwellings require one visitor space (ratio of one space per five dwellings). Overall total: 9 spaces.

A site plan providing only eight spaces is insufficient. The permit can be refused on this ground alone, regardless of the architectural compliance or other PLU requirements.

Possible reductions and exemptions

The Nice PLU allows, in certain sectors, for the number of required spaces to be reduced:

• Proximity to major public transport: if the project is located less than 500 metres from a tramway stop or a train station, a reduction of 20 to 30% may be granted. A location plan justifying this distance must be included in the permit application, and the request for a reduction must be explicitly stated in the project’s supporting notice.
• Requesting an exemption under Article L. 152-6 of the Town Planning Code: the mayor may, exceptionally, grant a minor exemption from the PLU rules where local circumstances justify it. This option is interpreted strictly and rarely applied to parking, a sensitive issue in terms of road safety and neighbourhood nuisance.

In the absence of a formally provided or granted reduction, full compliance with the ratios remains the rule.

Remedies in the event of a permit refusal

A refusal based on an insufficient number of parking spaces opens up two avenues of appeal.

Informal administrative appeal

Within two months of notification of the refusal, the applicant may submit an informal appeal to the mayor. This appeal sets out the factual or legal arguments demonstrating the project’s compliance, or requests a justified exemption. The municipality has two months to respond; no response amounts to an implicit rejection.

Judicial appeal

If the informal appeal is unsuccessful, a judicial appeal may be brought before the Nice Administrative Court within two months of notification of the final refusal (or of the implicit rejection of the informal appeal). This appeal should be prepared with the assistance of a lawyer specialising in urban planning law. The court reviews the legality of the decision in light of the PLU and the case file.

In both cases, an urban planning assessment carried out before the initial permit application is filed helps avoid such disputes by securing the calculation and presentation of the project.

Points to check before filing the permit application

• Download the Nice PLU regulations from the city’s website and identify the zone in which the plot is located (UA, UB, UC, UD, etc.).
• Read the full text of Article 12 for that zone, which sets the applicable ratios and any possible reductions.
• Carry out the full calculation, dwelling by dwelling, including visitor spaces.
• Check on the site plan that each space meets the NF P 91-120 standard dimensions (5.00 m × 2.50 m minimum) and that the driving lanes allow proper manoeuvring.
• If the project is near major public transport, include an annotated location plan and state the reduction request in the supporting notice.
• If necessary, seek the advice of an urban planning expert or an architect familiar with Nice’s procedures before final submission.

An incorrect or incomplete calculation frequently leads to a permit refusal or, in the case of an implicit permit, to a third-party appeal within the two-month period following the posting of the notice. Reworking the file after the fact generates costs and delays considerably higher than those of an initial review.

The role of the regulatory urban planning expert

The regulatory urban planning expert does not intervene in the architectural design of the project, but in its compliance with PLU requirements. Their role consists of:

• Analysing Article 12 of the regulations applicable to the plot.
• Checking the calculation of the number of spaces against the declared floor areas.
• Checking the dimensions shown on the site plan.
• Identifying any possible reductions or exemptions.
• Drafting, if necessary, a technical note to be attached to the permit application, justifying the project’s compliance or setting out the grounds for the exemption request.

This preliminary review secures the application and reduces the risk of a later refusal or dispute.

Cassini Expertise, an independent building expert, operates in Nice and throughout the Alpes-Maritimes for the regulatory review of construction projects and assistance in the event of a permit refusal. Contact: 04 22 46 06 04 — 22 rue Vauban, 06600 Antibes.

📅 Mis à jour le 26/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).