Winterizing a Second Home on the Riviera: The Complete Checklist

Close a house tight in Monaco, Èze or Villefranche with the heating off and the VMC stopped, and you create the perfect box for condensation and mold. The fix is simple and consistent with official guidance: keep a frost‑protection setpoint, keep air moving, and remove standing water from the system. It’s the difference between a fresh spring re‑opening and a season of dehumidifiers and plaster repairs.

Heat on, air moving: the non‑negotiables

For extended absences, maintain a frost‑protection temperature. ADEME recommends at least 8°C in “hors‑gel” mode, and many practitioners in water‑based systems use a band around 8–12°C. This protects pipes and limits damp spots without heating the house as if occupied. You’ll find general guidance on heating and humidity from ADEME here: ademe.fr.

Keep your VMC running. Ventilation prevents humidity build‑up, condensation on cold bridges, and the stale smell that takes weeks to shift. Aim to keep indoor humidity in the 40–60% band. In borderline rooms (basements, north‑facing bathrooms), a small desiccant dehumidifier can help. Never block grilles or trickle vents.

Water and electricity: shut, drain, make safe

Shut the main water at the meter and drain down: open all taps until they run dry, flush WCs, and put the water heater in “absence” mode if available. Outside lines and taps should be insulated with foam or lagging. This is what saves you from a split pipe after a cold night in Roquebrune‑Cap‑Martin.

Unplug non‑essential appliances instead of leaving them on standby. It trims background draw and protects against storm surges. Empty refrigerators and freezers, clean the interiors, and leave doors slightly ajar to avoid mold and odors.

Pool winterization on the Côte d’Azur

Give the pool a thorough clean: skim, brush walls and steps, vacuum, and clean filters. Add the manufacturer‑recommended winterizing chemicals, then fit a proper cover to keep debris and light out. If your site is exposed to autumn easterlies, check the cover tension after the first blows. For technical treatment (lowering water level below skimmers, blowing lines), lean on your pool technician; mistakes here are costly.

A screenshot‑ready closing checklist

• Set heating to frost‑protection (hors‑gel), typically no lower than 8°C.
• Leave VMC running; confirm vents and grilles are unobstructed.
• Shut main water; open taps to drain; insulate exterior pipes/taps.
• Water heater: switch to absence/standby as per the manual.
• Fridge/freezer: empty, clean, dry, and leave doors ajar.
• Bathrooms: dry shower screens, squeegee tiles, leave cabinet doors slightly open.
• Soft furnishings: lift cushions, leave airflow around sofas and mattresses.
• Windows/doors: lock; leave internal doors ajar for circulation.
• Close shutters; secure awnings; store outdoor cushions and textiles.
• Pool: clean, dose winter product, check cover.
• Alarms/cameras: test and arm; verify UPS/battery health.
• Storm prep: clear gutters, balcony drains, and terrace scuppers.
• Mail: set forwarding or a collection plan; pause regular deliveries.
• Meters: note readings; photograph for records and winter monitoring.
• Leave a hygrometer visible in a problem room; note baseline.

Concierge winter visits: why they matter when you’re away

Closed houses need eyes and fresh air. A monthly or post‑storm visit catches leaks early, resets dehumidifiers, and keeps odours at bay. In practice, that means opening shutters, airing rooms for 5–10 minutes, checking humidity, running taps briefly to refresh traps, and scanning for ingress after heavy rain.

Maison Cinq Étoiles provides exactly this as part of its Conciergerie: key holding, scheduled winter visits, storm call‑outs, and vendor coordination (pool techs, gardeners, locksmiths). We keep a simple log with photos and readings (humidity, meter snapshots) so you see trends, not just a “tout va bien”. Pricing is scoped per property and frequency; there’s no lock‑in, just a clear plan for the season.

Property‑management lens: protect asset value and rental plans

Damp closets and blackened silicone are more than a nuisance; they drag on your asset’s condition and, if you rent, on reviews and yield. A steady frost‑protection setpoint and ventilation are low‑cost insurance compared with stripped paint and swollen parquet. For owners weighing short‑stay and medium‑stay models in Nice or Beausoleil, your winter regime also ties into compliance and operating cost.

On the French side, fiscal abatements for furnished tourist lets change in 2025, and in tense zones a DPE becomes mandatory for changing the use of a dwelling to furnished tourist rental on a timeline (F from 2025, E from 2028, D from 2034). For reliable detail, consult ANIL: anil.org. In Monaco, specific short‑term rental legislation remains limited and evolving; authorities have flagged intentions to clarify. If your plan straddles both markets, build with that uncertainty in mind.

Maison Cinq Étoiles handles this under Property Management: practical advice to balance winter running costs with long‑term condition, vendor quotes for upgrades that reduce damp risk (for example, quiet continuous‑flow ventilation in a windowless shower room), and a rental calendar that respects maintenance windows. We coordinate architects and trades where a targeted fix is worth it; if a task is outside our scope, we’ll say so plainly.

Cleaning: close down clean, open up fast in spring

Closing clean is about removing food sources for mold and smells, and leaving surfaces dry. Degrease the kitchen, run a hot empty wash with a cleaner through the dishwasher and washing machine, descale taps and shower heads, dry shower screens and tile joints, and launder linens before storing them with airflow. For stone, use products appropriate to the material (Carrara vs. travertine react differently), and never trap damp under covers on marble tables.

Come spring, a structured “grand ménage de printemps” brings the property back to guest‑ready fast: windows, shutters, terrace jet‑wash where appropriate, mattresses aired, and inventories checked. Maison Cinq Étoiles handles both as part of its Cleaning pillar, with products and methods suited to Riviera materials and salt air. If you prefer to DIY the basics, we’re happy to step in just for the technical parts.

FAQ

What temperature should I leave my empty house in France during winter?

Keep a frost‑protection setpoint. ADEME advises at least 8°C in “hors‑gel” mode, and many owners use 8–12°C depending on the system. The aim is to protect the building and avoid condensation without heating as if occupied.

How do I prevent mold and condensation in an unoccupied property?

Run the VMC, avoid blocking vents, maintain a steady frost‑protection temperature, and keep indoor humidity around 40–60%. Air rooms briefly during winter visits and leave fridges clean with doors ajar.

Should I drain the water system and turn off electricity?

Shut and drain the water circuit and set the water heater to absence. Unplug non‑essential appliances to avoid standby draw and protect against surges. Keep safety systems powered as designed.

What are the essentials for winterizing a pool in France?

Clean thoroughly, treat with the manufacturer’s winter product, and cover the pool. For technical steps like lowering water level and blowing lines, use your pool technician.

If you want one team to close your place properly and visit it through winter, our three pillars—Cleaning, Property Management, and Conciergerie—work together. See how we structure it here: /services.