About us · Mont-Blanc valley
The team behind 250+ managed properties in the Mont-Blanc valley
Care Concierge & Properties is an independent, family-run group founded in the valley in 2021. We manage short-term and long-term rentals, we sell property, and we run seasonal chalets — from three offices between Les Houches and Megève.
Founded in 2021
250+ properties managed
Two offices in the valley
Independent and local
Reply within 24 h · Local team · Les Houches and Sallanches
250+
properties under management
Short-term and long-term, right across the valley.
Founded here in 2021, and still independent.
From Argentière down to Praz-sur-Arly.
Les Houches and Sallanches, plus a base in Megève.
The group
One group, three businesses
Care Concierge & Properties is the parent company. Underneath it sit three brands, each doing one thing properly rather than everything at once.
Short & long-term rentals
Care Concierge
Our original business, and still the largest. Full-service Airbnb and long-term rental management for owners across the valley, on a single commission of 19% including VAT.
Buying & selling
Swixim Immo
We are franchise owners within the Swixim International estate agency network, with an office in Sallanches. Valuations, sales and purchases throughout the valley and the Sallanches area.
Seasonal rentals in Megève
Ascent Megève
Recently acquired. Ascent specialises in longer seasonal stays in Megève — typically two to three months at a time, in chalets and apartments for a winter or a summer.
Owning all three means an owner can go from a valuation, to a rental strategy, to a sale without ever leaving the group — and without being handed over to a stranger halfway through.
Why owners choose us
Three things we do differently
Real data, not promises
Estimates built on our own portfolio
Every revenue estimate we give you comes from actual performance data across the properties we manage — location, property type, seasonality and real running costs. Not a generic online calculator.
Transparency
One commission, and we say no when we should
19% of the gross booking, VAT included, with nothing hidden underneath. We look after studios, family apartments and chalets alike — but where short-term rental is not the right answer for a property, we say so rather than take it on.
Responsible selection
We are not trying to manage everything
The goal is not a bigger portfolio. It is long-term partnerships with owners who want serious, high-performing management and no unpleasant surprises. Every property is looked after as if it were our own.
Our story
From three partners in a pandemic to more than 250 properties
Care Concierge was founded in February 2021 by three partners — Matthew Flammia, Sébastien Blasco and Sacha Cousin — in the middle of the pandemic, and largely out of necessity.
What the three brought to it was not new. Between them: years of combined experience in hotels, housekeeping, cleaning and front-line customer service, alongside backgrounds in marketing and technology. The gap they saw was not a lack of properties in the valley — it was that nobody was running them with the rigour of a hotel and the transparency an owner deserves.
That mix is still what the company runs on. Since then we have opened three offices, acquired an estate agency franchise, taken over the portfolios of smaller property managers and cleaning companies across the valley, grown the team and the vehicle fleet — and kept the same focus throughout: a better experience for guests, and a better one for owners.
The road so far
Five years, one valley
February 2021
Care Concierge is founded by three partners — Matthew Flammia, Sébastien Blasco and Sacha Cousin. The timing is not chosen: it is the middle of the pandemic, and the decision is taken largely out of necessity. The ambition is straightforward — build the best property management company in Chamonix.
December 2021
Twelve properties under management inside the first year, and the foundations of the business in place.
March 2022
We open our first office in Les Houches, to anchor a genuinely local presence and give the operations a proper base.
December 2022
Close to 100 properties under management, and a team of six.
April 2023
We move into real estate, acquiring the Swixim franchise so we can support owners buying and selling, not only renting.
January 2024
Two more locations open, in Sallanches and Megève.
July 2025
More than 200 properties, and a team of eighteen dedicated to operational excellence.
April 2026
We join forces with Ascent Megève, strengthening our position in seasonal rentals and becoming a reference for short-term rental in Megève.
Along the way we have taken on the portfolios of several smaller property managers and cleaning companies in the valley who wanted to sell up. Every one of those moves was about the same thing: more control over the service, and fewer people between the owner and the person actually doing the work.
The team
Our local team, by your side
You are never just another file here. Every new owner is looked after personally by Sébastien and Laila, from the first contact through the property visit and the revenue estimate. They are your direct points of contact — responsible for assessing the project, the level of service and the costs, openly.
Behind them, eighteen housekeeping staff and two area managers cover the valley from Argentière to Praz-sur-Arly, all employed by Care Concierge and trained in-house.
Proof, not adjectives
What owners and guests actually say
Every quote below is a real, unedited Google review of Care Concierge. Owners judge us on returns and peace of mind. Guests judge us on the state of the property and how fast we answer. Both are public, and both are on the same profile.
4.7
★★★★★
281 Google reviews
Care Concierge & Properties, Les Houches — the profile covering the whole Chamonix to Megève valley.
★★★★★
They have been managing my apartment since 2023 and I couldn’t be more pleased.
Kay Rush
Property owner
★★★★★
All communication with Care Concierge was quick and easy. We received very clear instructions on how to access the apartment and how to locate the key box. The apartment was exceptionally clean and we had a very comfortable stay.
Una Seavers
Guest · Chamonix centre
★★★★★
The concierge service were easy to reach via WhatsApp, all check-in and check-out instructions are online with videos to find the key box and car park space. We booked a late check-out via the online tool. All went smoothly.
Mathieu Lavedrine
Guest · Chalet Sia, Chamonix
★★★★★
Lovely one bedroom apartment great location for lifts to ski and ski hire straight across the road. … The apartment has stunning views from its balcony. Would definitely stay here again.
Kate Penrice
Guest · Chamonix
★★★★★
The property was beautiful, very comfortable, and perfectly suited for our large group. The house was well equipped and spacious… Overall a fantastic stay.
Mahsa Hojjat
Guest · Saint-Gervais-les-Bains
★★★★★
Un grand merci également à Care Concierge pour leur assistance irréprochable : toujours disponibles, très réactifs et vraiment à l’écoute. Leur accompagnement a rendu le séjour encore plus agréable.
“A big thank you to Care Concierge for their faultless support — always available, very responsive and genuinely attentive. It made the stay even better.”
Émilie Picard
Guest · Megève
What Google says reviewers mention most
Responsiveness
Cleanliness
The team
WhatsApp support
Rental management
Chalets
Location
Mont Blanc
We reply to every review, including the critical ones. If something went wrong in a property we manage, it is on that profile alongside what we did about it. We would rather an owner read the whole picture than a selection we chose ourselves.
Where we are
Two offices, a base in Megève, and a van that is already moving
We are not a call centre with a valley postcode. Our staff live here, our linen is stored here and our keys are held here. This is what each location actually is — described honestly, because turning up to a door that turns out to be a mailbox is a bad first impression.
Open daily, 9am–5pm
Les Houches — head office
275 avenue des Alpages
74310 Les Houches
Our registered office and the base for the Chamonix valley — Les Houches, Chamonix, Argentière and Servoz. Owner meetings, the operations desk and management happen here. Walk in during opening hours or call ahead.
Open daily, 9am–5pm
Sallanches — office
33 quai de Warens
74700 Sallanches
Our second staffed office, covering Sallanches, Passy, Combloux and the lower valley. This is also where Swixim Immo sits, so a conversation that starts about renting a property and turns into a conversation about selling it does not have to move buildings.
Staffed, by arrangement
Megève — operational base
336 route du Palais des Sports
74120 Megève
A shared space rather than a shopfront: our Megève linen stock and the key collection point for properties in the area, with someone on site. It is where the Megève portfolio is serviced from. Arrange a time before coming rather than dropping in.
We come to you
Saint-Gervais-les-Bains — by appointment
No public counter
Saint-Gervais & Le Fayet
We manage a substantial number of properties in Saint-Gervais and Le Fayet, but there is no office to visit. Meetings happen at your property or at Les Houches, whichever suits you. Call and we will come to you.
All four locations answer on the same WhatsApp number during the day, and an on-call phone runs outside office hours for guests already staying in a property we manage.
Regulated, insured, accountable
The paperwork behind the promise
Managing a property on someone else’s behalf in France is a regulated profession. It requires a licence, a financial guarantee and professional indemnity cover. Here is ours, in full, so you can check it.
Licence
Carte professionnelle CPI 7401 2021 000 000 012
Issued by the CCI Haute-Savoie under the loi Hoguet of 2 January 1970, covering both property management and transactions on property and businesses. This licence is what legally permits us to manage a property, collect rent and hold funds on an owner’s behalf. It is a requirement, not a badge — and it is worth asking any company you speak to for their number.
Financial guarantee
€1,000,000 held with SO.CA.F
Guest payments and your rental income pass through our account before they reach you. The guarantee exists so that money is protected even if the company were to fail. Attestation n° 33 000, SO.CA.F, 26 avenue de Suffren, 75015 Paris, valid to 31 December 2026 and renewed annually.
Insurance
Professional indemnity cover
Professional civil liability insurance through SO.CA.F under the same policy number, covering the whole of French territory. It answers for professional error — a missed declaration, a mishandled mandate — separately from the buildings insurance you hold on the property itself.
The company
Care Properties Management & Advisory, SAS
Registered 5 February 2021. Share capital €5,000. RCS Annecy B 893 974 501. SIREN 893 974 501. VAT FR03 893 974 501. Registered office 275 avenue des Alpages, 74310 Les Houches. President: Sacha Cousin. No capital or legal ties to any bank or financial institution.
A second SO.CA.F guarantee of €110,000 covers our transaction activity on a non-fund-holding basis — the estate agency side, handled under the Swixim Immo brand. Both attestations are dated 8 June 2026 and run to the end of the year. Ask us for a copy at any time; we will send them.
Join us
We are hiring, all year round
We recruit housekeeping staff every single season without a break, and we are always looking for maintenance people — and for anyone with a background in AI, SEO or online marketing.
For housekeeping roles, accommodation and a work vehicle are provided. Our teams work in French, English, Spanish and Arabic, and a large part of the team comes from Argentina.
Common questions
About Care Concierge
Who is behind Care Concierge?
Care Concierge was founded in February 2021 by three partners — Matthew Flammia, Sébastien Blasco and Sacha Cousin — and is run as an independent business in the Mont-Blanc valley.
Day to day the team is led by Sébastien Blasco (owner relations), Laila D’ham (operations, housekeeping and logistics), Sacha Cousin (administration and finance) and Lorie Chanel (communications and guest coordination).
How many properties do you manage?
More than 250, across short-term and long-term rental, in Chamonix, Argentière, Les Houches, Saint-Gervais-les-Bains, Megève, Combloux and Sallanches.
Where are your offices?
Two offices open seven days a week, 9am to 5pm: Les Houches (275 avenue des Alpages, our registered office) and Sallanches (33 quai de Warens). We also have an operational base in Megève (336 route du Palais des Sports) — linen stock and key collection, by arrangement — and we travel to Saint-Gervais and Le Fayet. Being in the valley rather than in a call centre somewhere else is the whole point of the company.
Is Care Concierge part of a larger group?
Yes. Care Concierge & Properties is the parent company. It owns three brands: Care Concierge for short and long-term rental management, Swixim Immo for buying and selling (we are franchise owners in the Swixim International network, with an office in Sallanches), and Ascent Megève for longer seasonal stays in Megève.
How long have you been operating?
Since February 2021, when the three partners started the company during the pandemic. We began with a handful of properties and have grown every season since — opening three offices, acquiring the Swixim estate agency franchise in 2023, and taking on the portfolios of several smaller property managers and cleaning companies in the valley.
Do you also sell property?
Yes, through Swixim Immo, our estate agency in Sallanches. It means an owner can get a valuation, run the property as a rental, and eventually sell it without ever leaving the group.
How do I leave, and what does it cost?
The mandate runs for twelve months and renews. Either side can end it with thirty days’ written notice, and you have fourteen days to withdraw after signing.
What matters is what leaving actually costs, so here it is plainly. If your calendar is empty, nothing. If guests are already booked when you give notice, cancelling or rehousing them costs money — that money goes to the platforms and to those guests, not to us, and on a last-minute cancellation it can reach 70% of the booking. We charge €40 an hour for the work of unwinding it.
Which is why our advice to any owner thinking about leaving is the same one we would give a friend: give notice between seasons, in April or October, when nothing is on the books. Then it costs you nothing and it costs your guests nothing.
We have never held on to an owner who wanted to go, and we do not intend to start.
Let’s talk about your property
Entrust your property to a team that actually lives here
We look at your property, its commune and its seasonality, then send you a costed estimate of what it could earn. No commitment, within 24 hours.
19% of the gross booking, VAT included · Cleaning paid by the guest · Two offices in the valley
