Villeneuve-Loubet: Clay Soil, Subsidence and Cracks – Official Data

The official clay shrink-swell exposure rating

The GéoRisques platform (BRGM) classifies Villeneuve-Loubet as high exposure to clay shrink-swell (RGA – retrait-gonflement des argiles), with some sectors at medium exposure. This is the reference level used by insurers and notaires to assess the risk on a plot.

This zoning completes the decree record above: the hazard level tells you what can happen, the decrees tell you what has already happened. A house in a “high exposure” area that has been through one or more dry summers carries a risk of damage that is all the better documented.

What the official clay mapping says

The GéoRisques platform (BRGM) classifies Villeneuve-Loubet as high exposure to clay shrink-swell, with some sectors at medium exposure. This is the reference level used by insurers and notaires to assess the risk on a plot.

This zoning completes the decree record above: the hazard level tells you what can happen, the decrees tell you what has already happened. A house in a “high exposure” area that has been through one or more dry summers carries a risk of damage that is all the better documented.

Villeneuve-Loubet facing clay shrink-swell: what to do if your house is cracking?

Villeneuve-Loubet combines a clearly identified clay zone with a substantial Cat Nat record: the GASPAR database lists 3 drought decrees (full list below) and 21 flood decrees, i.e. 24 natural disaster (Cat Nat) decrees. The rainfall records tell the same story: four years below average in a row (2020 to 2023), then a sharp return to 1,239 mm in 2024 (+50%) – exactly the scenario that puts foundations to work in the fortified village and along the coast. If your house shows cracks and you live in the commune, the first two reflexes are: check whether the damage dates from one of these dry periods, and fit a tell-tale over the crack to see whether it evolves.

Cassini Expertise, an independent building expert, handles cracks and drought-related damage in Villeneuve-Loubet and throughout the department. This page brings together the official data for the commune, with no commercial angle, to help you know where you stand.

Does my cracked house in Villeneuve-Loubet match a drought decree?

The GASPAR database (decrees published in the Journal officiel since 1982) attributes 24 natural disaster decrees to the commune:

• 3 drought decrees (differential ground movement caused by clay shrink-swell)
  • event of 01/07/2003 (decree of 27/05/2005)
  • event of 01/07/2007 (decree of 07/08/2008)
  • event of 01/04/2022 (decree of 03/04/2023)
• 21 decrees relating to floods and storms

First thing to do: place the appearance of your cracks against these three dates. If it matches, two avenues open up – Cat Nat compensation (provided you declared within 30 days), or failing that a claim against the seller for hidden defect (vice caché) or fraudulent concealment (dol). If your cracks are recent and match no decree, keep the file anyway: a new decree can be issued after the fact for a dry episode not yet recognised.

Is my plot classified at risk by the BRGM?

The GéoRisques platform (BRGM) classifies Villeneuve-Loubet as high exposure to clay shrink-swell, with some sectors at medium exposure. This is the level your insurer and your notaire already consult to assess the risk on your plot – you can check it yourself on georisques.gouv.fr by entering your address.

This zoning completes the decree record above: the hazard level tells you what can happen, the decrees tell you what has already happened. If your house is in a high exposure area and has been through one or more dry summers, take cracks seriously as soon as they go beyond a simple hairline.

Why is my house cracking when 2024 was rainy?

Annual rainfall measured on the Villeneuve-Loubet weather grid (Open-Meteo data):

• 2019: 1,167 mm · 2020: 679 mm · 2021: 639 mm · 2022: 600 mm · 2023: 635 mm · 2024: 1,239 mm
• Average over the period: 826 mm/year, low point in 2022 with 600 mm
• Four consecutive years below average (2020-2023): 679, 639, 600 then 635 mm
• Spectacular rebound in 2024 to 1,239 mm, i.e. +50%

It is precisely this return of rain that explains your cracks today. The phenomenon plays out in two acts. First the drought dries the clay at depth: the ground shrinks, the first cracks appear. Then the rain returns and rehydrates the ground at once: swelling, differential movement. If you live in a 1970s-2000 villa on shallow foundations, yours takes the hit first – often 12 to 24 months after the dry episode. In practical terms: a crack appearing in 2024 or 2025 may well be linked to the 2022-2023 drought.

Weekly drought update (as at 04/10/2026)

In the commune: not a drop of rain for over a month. Rainfall over the last 30 days: 2 mm, against roughly 57 mm expected at this time of year – a 96% deficit.

A sustained deficit over this window, especially during the growing season, often precedes by a few weeks the drop in the water table visible above: it is the first signal owners can track themselves, before any cracks appear.

Drought right now (as at 05/10/2026)

In the commune: not a drop of rain for over a month. Rainfall over the last 30 days: 2 mm, against roughly 59 mm expected at this time of year – a 97% deficit.

A sustained deficit over this window, especially during the growing season, often precedes by a few weeks the drop in the water table visible above: it is the first signal owners can track themselves, before any cracks appear.

Weekly drought update (as at 12/10/2026)

In the commune: recent rain (5 days ago). Rainfall over the last 30 days: 20 mm, against roughly 69 mm expected at this time of year – a 71% deficit.

A sustained deficit over this window, especially during the growing season, often precedes by a few weeks the drop in the water table visible above: it is the first signal owners can track themselves, before any cracks appear.

Drought right now (as at 19/10/2026)

In the commune: no significant rain for 12 days. Rainfall over the last 30 days: 20 mm, against roughly 80 mm expected at this time of year – a 75% deficit.

A sustained deficit over this window, especially during the growing season, often precedes by a few weeks the drop in the water table visible above: it is the first signal owners can track themselves, before any cracks appear.

When was the water table last this low?

The reference piezometric station for the area (002FFSZ) has been monitoring the water table since 1997 – 30 years of records. As at 26/09/2026, the average level over the last thirty days is 70.81 m NGF (NGF, the French ordnance datum). Across the entire record, the water table has spent only 24.0% of its time below this level: a low level, in the lower quartile of known values.

• Last comparable episode: 30/10/2023 – 2.9 years ago
• Frequency: 19 similar episodes recorded since 1997, i.e. a return period of once every 2 years on average – in hydrologists’ terms, an intermediate episode
• Historical minimum: 65.58 m NGF, reached on 24/10/2022

This long memory changes how the risk should be read: a low level is not just a passing weather episode, it is an event whose frequency is known. For a house on clay, it is this frequency that tells you the probability of further settlement – and therefore how urgent the precautions are.

The geological and climate context of Villeneuve-Loubet

We know Villeneuve-Loubet well: it is a commune of scattered geography, between the concrete seafront of Marina Baie des Anges, the Loup plain and the hills rising towards Vaugrenier and La Bastide. This diversity of relief translates into a diversity of housing – and therefore of behaviour in the face of clay: the 1970s-80s Provençal villas built on the first foothills, often with lightly reinforced shallow foundations to the standards of the time, are particularly exposed when the clay ground starts working. We are regularly called there to houses built on a slight slope, where differential settlement reads clearly on the façade, on the south-facing side, where the sun dries the ground fastest. The more recent estates, developed on the hillsides during the building waves of the 1990s-2000s, do not escape the problem: clearing the original Mediterranean vegetation – pines and holm oaks whose roots naturally regulated soil moisture – often destabilised ground that previously held water better. After every prolonged drought, as we see more and more often in this area, we record the appearance or worsening of diagonal cracks at the corners of openings, the typical signature of clay shrink-swell. The rolling relief of Villeneuve-Loubet, combined with this history of construction in several waves, makes it an area where we systematically recommend a soil survey before any extension or new build.

Drought in the rear-view mirror: 35 years of measured rainfall

Weather archives for the area cover 35 complete years (1991-2025). The driest ever recorded: 2017, with 475 mm of rain over the year, against a local average of 908 mm. 2022 ranks as the 3rd driest year out of 35 (600 mm vs a 908 mm average); 2023 follows in 4th place (635 mm).

This ranking gives the true measure of the recent sequence: when the years 2020-2023 all sit near the top of the dry-years table, the clay has had no time to rehydrate between episodes – the textbook scenario for delayed cracking. The reverse is just as telling: a very wet year following an exceptional drought triggers abrupt swelling of the ground.

Damp, water ingress and rising damp in Villeneuve-Loubet

Damp in a wall can have four causes – rising damp, water ingress, condensation or a leak – and the treatments are completely different depending on the origin.

An owner from Villeneuve-Loubet wrote to us about a damp mark at the base of a wall. He had read on the internet that he needed resin injections or a dual-flow ventilation system. Our message: not so fast. Before signing anything, the real cause has to be identified.

The 4 causes and how to recognise them

• Rising damp: ground water climbs into the masonry by capillary action. A mark starting at the base of the wall, often stopping around 1 metre, with crumbling render and efflorescence (saltpetre).
• Water ingress: rainwater gets in through a façade, a roof or a defective joint. A weather-related mark, often high up or near an opening, worse after a storm.
• Condensation: ambient moisture settles on a cold surface, for lack of ventilation. Black mould in corners, bathrooms, behind furniture against an outside wall.
• Leak: a leaking pipe, gutter or terrace. A localised mark, sometimes below an identifiable water point, that can appear suddenly.

The trap of the diagnosis sold by the treatment contractor

Many companies focused on damp treatment offer a “free quote”. The problem: they then sell their own solution, and this diagnosis almost always concludes rising damp, which justifies their injection service – often costly and sometimes useless. If the real cause is water ingress or condensation, the treatment will solve nothing and the damp will return, with money wasted on top.

In Villeneuve-Loubet as elsewhere, an independent diagnosis, with no commercial interest in selling a particular treatment, is the only way to be certain of the cause before committing to works. Do not hesitate to contact us for an objective opinion. To go further, read our damp guide for the 06, 83 and 13, which details the diagnostic methods and the treatments suited to each cause.

Which signs on my crack should alert me?

• A stair-step crack, passing through the wall, wider than 2 mm
• A crack that evolves: fit a plaster tell-tale or a dated marker and monitor it over several months
• Other signs to check inside the house: doors and windows that stick, floor tiles splitting diagonally, render that bulges
• Other signs to check around the house: clay ground, a tree close to the foundations, drainage that no longer does its job

With 3 drought decrees on the commune’s record, combining several of these signs alone justifies a survey before any repair – and before any buying or selling decision.

Buying or selling a cracked house in Villeneuve-Loubet: what are your options?

Between the recent drought decrees and the volume of transactions under way, plenty of properties change hands with damage passed over in silence. If you are the buyer and discover cracks after the sale, two levers are open to you:

• Hidden defect (vice caché, Article 1641 of the French Civil Code): serious cracks, not detectable at the viewing, predating the sale → price reduction or cancellation of the sale, action possible within 2 years of discovery
• Fraudulent concealment (dol, Article 1137): the seller knew and concealed the damage → cancellation of the sale and damages, 5-year time limit; the commune’s GASPAR decree record then supports the file

In both cases, have the damage dated by a survey before engaging a French property lawyer: it is this report that will make the difference before the judge.

What does a drought/clay survey in Villeneuve-Loubet look like?

• On-site visit: crack mapping and classification, width measurements, associated functional disorders
• Context: the clayey nature of the ground, the commune’s Cat Nat history (3 drought decrees), local dry episodes
• Costing of feasible works: underpinning, injections, drains – with several scenarios to suit your budget
• A written report, directly usable by your insurer or your lawyer

For an on-site visit: building expert in Villeneuve-Loubet.

Independent expert, no ties to any repair company. Request a visit in Villeneuve-Loubet – also read our complete RGA and Cat Nat guide for the 06, 83 and 13.

Soil surveys on clay ground: what the regulations say

The requirement for a preliminary geotechnical survey has applied since 1 October 2020 (ELAN law, art. 68); the new exposure map of 1 July 2026 widens its scope. This requirement, introduced by the ELAN law no. 2018-1021, article 68 (decree no. 2019-495 of 22 May 2019), applies particularly to Villeneuve-Loubet (high exposure under the BRGM classification).

• What it changes for building: a soil survey is no longer optional – the ELAN law makes it compulsory in exposed zones for any sale of unbuilt land and any construction contract. Adapted foundations, ground treatment, drainage arrangements: the specifications flow directly from the survey.
• What it changes when buying a recent property: ask whether the survey was carried out and which specifications were applied. A house built without following the geotechnical recommendations on clay ground is a medium-term cracking risk.
• What it changes for sellers: the absence of a survey on a property built before the requirement is not a defect in itself – but if damage appears, a seller who knew about it and concealed it exposes themselves to a claim for fraudulent concealment (dol).
• The link with the data above: Villeneuve-Loubet combines high exposure with a documented record of drought decrees. Building or buying here without checking the nature of the ground means building on a known and measured risk.

Cassini Expertise handles these files: compliance checks between geotechnical specifications and what was actually built, damage surveys on clay ground, second-opinion expert assessments. Request a consultation.

Soil surveys on clay ground: what the regulations say

The requirement for a preliminary geotechnical survey has applied since 1 October 2020 (ELAN law, art. 68); the new exposure map of 1 July 2026 widens its scope. This requirement, introduced by the ELAN law no. 2018-1021, article 68 (decree no. 2019-495 of 22 May 2019), applies particularly to Villeneuve-Loubet (high exposure under the BRGM classification).

• What it changes for building: a soil survey is no longer optional – the ELAN law makes it compulsory in exposed zones for any sale of unbuilt land and any construction contract. Adapted foundations, ground treatment, drainage arrangements: the specifications flow directly from the survey.
• What it changes when buying a recent property: ask whether the survey was carried out and which specifications were applied. A house built without following the geotechnical recommendations on clay ground is a medium-term cracking risk.
• What it changes for sellers: the absence of a survey on a property built before the requirement is not a defect in itself – but if damage appears, a seller who knew about it and concealed it exposes themselves to a claim for fraudulent concealment (dol).
• The link with the data above: Villeneuve-Loubet combines high exposure with a documented record of drought decrees. Building or buying here without checking the nature of the ground means building on a known and measured risk.

The soil survey requirement: what has changed since July 2026

Since 1 July 2026, any construction or extension on ground exposed to clay shrink-swell requires a preliminary geotechnical survey. This requirement, introduced by the Climate and Resilience law (article 88), applies particularly to Villeneuve-Loubet (high exposure under the BRGM classification).

• What it changes for building: a soil survey is no longer optional – it conditions the planning permission. Adapted foundations, ground treatment, drainage arrangements: the specifications flow directly from the survey.
• What it changes when buying a recent property: ask whether the survey was carried out and which specifications were applied. A house built without following the geotechnical recommendations on clay ground is a medium-term cracking risk.
• What it changes for sellers: the absence of a survey on a property built before the requirement is not a defect in itself – but if damage appears, a seller who knew about it and concealed it exposes themselves to a claim for fraudulent concealment (dol).
• The link with the data above: Villeneuve-Loubet combines high exposure with a documented record of drought decrees. Building or buying here without checking the nature of the ground means building on a known and measured risk.

Frequently asked questions

Is Villeneuve-Loubet in a clay risk zone?

The Alpes-Maritimes is overwhelmingly covered by the clay shrink-swell hazard (BRGM mapping, consultable on georisques.gouv.fr). For Villeneuve-Loubet, the 3 drought decrees in the GASPAR database confirm that the risk is anything but theoretical: check your address on the site to find out your exact exposure level.

Can a cracked house in Villeneuve-Loubet be compensated under natural disaster provisions?

Only if your damage falls within a period covered by a decree (the last recognised: 2005, 2008, 2023) and if you filed your declaration within 30 days of the decree. Failing that, the route of a claim against the seller remains – and there, precisely dating the damage by survey becomes the decisive element of your file.

Can the figures quoted on this page be verified?

Yes: the decrees come from the GASPAR database (Journal officiel, open data sets, updated 2025), and the rainfall figures from the Open-Meteo weather archives for the Villeneuve-Loubet grid. Cassini Expertise simply reports them, without altering them – you can cross-check every figure yourself before making a decision.

Villeneuve-Loubet: 24 Cat Nat decrees since 1982, in chronological order

Each line = an event recognised by a prefectoral decree published in the Journal officiel (GASPAR database):

• 🔴 07/2003 → 09/2003 – Drought (RGA – clay shrink-swell) (decree of 27/05/2005)
• 🔴 07/2007 → 09/2007 – Drought (RGA – clay shrink-swell) (decree of 07/08/2008)
• 🔴 04/2022 → 09/2022 – Drought (RGA – clay shrink-swell) (decree of 03/04/2023)

How an expert reads this: 3 droughts and 21 floods. Clusters (several decrees close together) mark crisis periods – the summer sequence of 2022-2023 is the best recent example. An owner whose damage dates from a covered period has a solid Cat Nat file; outside a covered period, the route is a claim against the seller.

Villeneuve-Loubet: 24 Cat Nat decrees since 1982, in chronological order

Each line = an event recognised by a prefectoral decree published in the Journal officiel (GASPAR database):

• 🔵 11/1982 → 11/1982 – Cyclones / Storms (decree of 15/12/1982)
• 🔵 11/1982 → 11/1982 – Floods (decree of 04/02/1983)
• 🔵 10/1987 → 10/1987 – Floods (decree of 02/12/1987)
• 🔵 09/1993 → 09/1993 – Floods (decree of 19/10/1993)
• 🔵 10/1993 → 10/1993 – Floods (decree of 29/11/1993)
• 🔵 01/1994 → 01/1994 – Floods (decree of 12/04/1994)
• 🔵 11/1994 → 11/1994 – Floods (decree of 21/11/1994)
• 🔵 10/1999 → 10/1999 – Floods (decree of 03/03/2000)
• 🔵 10/2000 – Floods (decree of 19/12/2000)
• 🔵 11/2000 → 11/2000 – Floods (decree of 19/12/2000)
• 🔵 11/2000 → 11/2000 – Floods (decree of 03/12/2001)
• 🔴 07/2003 → 09/2003 – Drought (RGA – clay shrink-swell) (decree of 27/05/2005)
• 🔵 09/2005 → 09/2005 – Floods (decree of 16/12/2005)
• 🔵 12/2005 → 12/2005 – Floods (decree of 05/05/2006)
• 🔴 07/2007 → 09/2007 – Drought (RGA – clay shrink-swell) (decree of 07/08/2008)
• 🔵 10/2010 → 11/2010 – Floods (decree of 30/03/2011)
• 🔵 11/2011 → 11/2011 – Floods (decree of 18/11/2011)
• 🔵 11/2014 → 11/2014 – Floods (decree of 03/03/2015)
• 🔵 10/2015 – Floods (decree of 07/10/2015)
• 🔵 11/2019 → 11/2019 – Floods (decree of 28/11/2019)
• 🔵 12/2019 → 12/2019 – Floods (decree of 13/01/2020)
• 🔴 04/2022 → 09/2022 – Drought (RGA – clay shrink-swell) (decree of 03/04/2023)
• 🔵 01/2025 → 01/2025 – Floods (decree of 21/04/2025)

How an expert reads this: 3 droughts and 21 floods. Clusters (several decrees close together) mark crisis periods – the summer sequence of 2022-2023 is the best recent example. An owner whose damage dates from a covered period has a solid Cat Nat file; outside a covered period, the route is a claim against the seller.

Forty years of decrees: the complete timeline of Villeneuve-Loubet

Each line = an event recognised by a prefectoral decree published in the Journal officiel (GASPAR database):

• 🔵 11/1982 → 11/1982 – Cyclones / Storms (decree of 15/12/1982)
• 🔵 11/1982 → 11/1982 – Floods (decree of 04/02/1983)
• 🔵 10/1987 → 10/1987 – Floods (decree of 02/12/1987)
• 🔵 10/1987 → 10/1987 – Floods (decree of 02/12/1987)
• 🔵 09/1993 → 09/1993 – Floods (decree of 19/10/1993)
• 🔵 10/1993 → 10/1993 – Floods (decree of 29/11/1993)
• 🔵 01/1994 → 01/1994 – Floods (decree of 12/04/1994)
• 🔵 11/1994 → 11/1994 – Floods (decree of 21/11/1994)
• 🔵 10/1999 → 10/1999 – Floods (decree of 03/03/2000)
• 🔵 10/2000 – Floods (decree of 19/12/2000)
• 🔵 10/2000 → 10/2000 – Floods (decree of 19/12/2000)
• 🔵 11/2000 → 11/2000 – Floods (decree of 19/12/2000)
• 🔵 11/2000 → 11/2000 – Floods (decree of 03/12/2001)
• 🔴 07/2003 → 09/2003 – Drought (RGA – clay shrink-swell) (decree of 27/05/2005)
• 🔵 09/2005 → 09/2005 – Floods (decree of 16/12/2005)
• 🔵 12/2005 → 12/2005 – Floods (decree of 05/05/2006)
• 🔴 07/2007 → 09/2007 – Drought (RGA – clay shrink-swell) (decree of 07/08/2008)
• 🔵 10/2010 → 11/2010 – Floods (decree of 30/03/2011)
• 🔵 11/2011 → 11/2011 – Floods (decree of 18/11/2011)
• 🔵 11/2014 → 11/2014 – Floods (decree of 03/03/2015)
• 🔵 10/2015 – Floods (decree of 07/10/2015)
• 🔵 11/2019 → 11/2019 – Floods (decree of 28/11/2019)
• 🔵 12/2019 → 12/2019 – Floods (decree of 13/01/2020)
• 🔴 04/2022 → 09/2022 – Drought (RGA – clay shrink-swell) (decree of 03/04/2023)
• 🔵 01/2025 → 01/2025 – Floods (decree of 21/04/2025)

How an expert reads this: 3 droughts and 21 floods. Clusters (several decrees close together) mark crisis periods – the summer sequence of 2022-2023 is the best recent example. An owner whose damage dates from a covered period has a solid Cat Nat file; outside a covered period, the route is a claim against the seller.

Find out more: Article 1641 of the Civil Code and the hidden defects warranty (garantie des vices cachés), explained.

Survey carried out by Frédéric Faucouneau, independent building expert – Antibes, Alpes-Maritimes (06), Var (83), Bouches-du-Rhône (13). Find out more

📅 Last updated 06/11/2026 - Cassini Expertise, independent building expert – departments 06, 83 and 13.