Treated surface
The surface we actually clean and treat, plus a margin around it. Not the floor area of the room and not the whole wall.
Mold treatment and cleaning from Sanremo to Antibes
Prices and how they are calculated
We remove mold and mould from walls, ceilings, bathrooms and cellars between Sanremo and Antibes, including Menton, Monaco and Nice. We charge for the surface actually treated, and the rate shown here is the same one that goes into your quotation. There are no hidden coefficients and no surcharges you find out about at the end.
€45-90/m²Of treated surface, not of room floor area.
Minimum €250Zone A. Zone B is €350. Travel included.
3-month guaranteeProvided the cause of the moisture has been dealt with.
Estimate from photosPrice and timing before the visit, no survey call-out.
What determines the price
Four things. All four are visible in a photo, which is why we can name a price before travelling out.
Access to the work area
A flat wall you can reach from the floor and a corner under the ceiling reached from a stepladder are different work at the same square metrage. Furniture, niches and narrow profiles add time.
Ventilation of the room
In a poorly ventilated room — bathroom, store cupboard, cellar — the product clears more slowly, the work is done in protective equipment and in intervals, and the outbreak is usually deeper.
Severity of the deposit
A fresh film comes off in one pass. An old outbreak that has grown into the substrate needs mechanical scraping and two or three passes with dwell time.
Mould treatment rates
Price per square metre of affected surface. Products, consumables and protective equipment are included.
Standard
€45-55/m²One pass. Flat wall or ceiling, free access from the floor, ventilated room. Also covers one pass with a single complication, such as working from a stepladder.
Typically: a patch after a leak, the ceiling of a dry store room, a corner behind a moved wardrobe.
Difficult
€55-75/m²Two passes in ordinary conditions, or one pass in hard ones: bathroom, cellar or store cupboard with poor ventilation, plus work from a stepladder.
Typically: shower joints, bathroom tiling, a corner on a cold bridge, a cellar wall.
Specific
€75-90/m²Two passes with several complications at once: height, closed room, cramped space, work under sanitary ware or behind an appliance.
Typically: boxing and niches, a surface behind fixed furniture, an old outbreak in a long-closed flat.
The three ranges above are not separate packages but three bands of one and the same calculation, grouped for quick orientation. The calculation itself is below, and any quotation of ours can be checked against it.
Preventive pass over visually clean surface: €15-30/m², once. It applies to the rest of the surface in a damp room, where no trace is visible but spores are present. It is calculated from a base of €15/m² with the same coefficients as the main rate. Why it is essential: explained below.
Ventilation and air-conditioning grilles, ducts and similar structures are quoted individually. They need mechanical scraping of the profile and edges, and the price can exceed €90/m².
Large areas from 20 m² are also quoted individually. At that volume the organisation of the work changes, and the rate per metre is revised in your favour.
The exact calculation: base rate and coefficients
This is how the price is set in a written quotation. Nothing here is kept back: take your quotation and check it line by line.
Base rate: €45/m²
Open flat surface, free access from the floor, ventilated room, one pass. Product, consumables and personal protective equipment are already included in the base.
- K1 — work from a stepladder, up to 3 m× 1.10-1.20
- K2 — work above 3 m, platform or scaffold× 1.25-1.40
- K3 — cramped space, no room to turn× 1.10-1.20
- K4 — obstructed area: under a bath, under a basin, behind an appliance, in a niche× 1.15-1.30
- K5 — closed room, poor ventilation× 1.15-1.25
- K6 — first pass1.00
- K6 — each further pass+ 0.40-0.60
Each coefficient is a range, not a fixed number. Where it sits in the range depends on how pronounced the condition is: a stepladder at 2.2 m and overhead work at 3 m are a different 1.10 and 1.20. A bathroom with an opening window and a blind cellar with no extraction are a different 1.15 and 1.25. The value we use goes into the quotation and is justified there, not picked afterwards.
K1 and K2 are mutually exclusive. The other coefficients multiply, but they almost never all apply at once: in an ordinary home one or two come into play.
The preventive pass follows the same scheme but starts from a base of €15/m² and always counts as one pass. Hence the range: from €15/m² on an open wall to €30/m² in a cramped, obstructed bathroom.
Where the €45-90 range comes from
Flat wall, from the floor, one pass
45 × 1.00 = €45/m² · lower bound
One pass from a stepladder
45 × 1.10...1.20 = €49.50...54/m²
Two passes, flat surface
45 × 1.40...1.60 = €63...72/m²
Two passes, unventilated bathroom
45 × 1.15...1.25 × 1.40...1.60
= €72.45...90/m² · upper bound
45 × 1.00 = €45/m² · lower bound
One pass from a stepladder
45 × 1.10...1.20 = €49.50...54/m²
Two passes, flat surface
45 × 1.40...1.60 = €63...72/m²
Two passes, unventilated bathroom
45 × 1.15...1.25 × 1.40...1.60
= €72.45...90/m² · upper bound
The lower bound of €45/m² is the base with not a single coefficient. The upper bound of €90/m² is the heaviest case that is still calculated by the formula.
If the calculation exceeds €90/m² — three passes, work above three metres, treatment under a bath in a cramped bathroom, ventilation grilles — the job moves to an individual quotation. We discuss it with you separately rather than issuing an invoice from a formula that has run past sensible limits.
How the surface is measured
This is the main thing people end up disagreeing about on a quotation. So we set out the rule in advance.
The calculation covers the treated surface
Not the floor area of the room, not the floor itself, not the whole wall. Only the surface we mechanically scrape and treat with the product.
That surface always includes a margin of 5 to 10 cm around the visible patch. The mycelium runs beyond what the eye can see. Treat exactly to the edge of the patch and the mould returns along the border of the treated area — which looks as though the work was pointless.
Wall patch 40 × 60 cm
plus a 5 cm margin on each side
→ counted as 50 × 70 cm = 0.35 m²
Joints, seams and grilles are counted
in linear metres × width of the treated strip:
grille 6.00 m × 0.25 m = 1.50 m²
(0.15 m slot plus 0.05 m of ceiling and wall on each side)
plus a 5 cm margin on each side
→ counted as 50 × 70 cm = 0.35 m²
Joints, seams and grilles are counted
in linear metres × width of the treated strip:
grille 6.00 m × 0.25 m = 1.50 m²
(0.15 m slot plus 0.05 m of ceiling and wall on each side)
We have no minimum metrage. If the affected area is genuinely small, it is counted as it is — we do not round it up to a metre to inflate the quotation. It is simply the total that will run into the minimum call-out for the zone: travel, preparation and cleaning afterwards cost the same whatever the size of the patch.
Why the whole room is treated, not just the patch
The most common misunderstanding. Better cleared up before you see the figure on the quotation.
The visible patch is not all of the mould
Where an outbreak has already appeared on the surface, spores are spread throughout the room. They settle on walls, the ceiling, behind furniture and in the places you simply never look.
This applies particularly to bathrooms, small cellars and store cupboards — rooms with high humidity and poor ventilation. Their whole surface is contaminated, including where nothing is visible. Treating one corner does not solve the problem: the cleaned area is recolonised from spores left half a metre away.
What is done in such a room:
affected areas → full treatment
mechanical scraping and as many passes as needed, €45-90/m²
the whole remaining surface → preventive pass
once, to kill spores on clean walls, €15-30/m²
affected areas → full treatment
mechanical scraping and as many passes as needed, €45-90/m²
the whole remaining surface → preventive pass
once, to kill spores on clean walls, €15-30/m²
A real example. In a bathroom the owner sees mould in the corner above the shower — because that is where they wash and where they look. The actual outbreak is under the bath or behind the basin pedestal, where nobody looks for months. Treat the corner and you will see it again a month later and conclude that the treatment does not work.
That is why in damp rooms we treat this as a whole-room treatment and not a spot clean. In a dry, ventilated room with a localised leak the rule is different: there we treat the area with its margin, and there is no need to go over the whole room.
Mould treatment and painting are two different things
They get confused constantly, and that is how people end up paying twice.
What our treatment does
The product does not damage plaster or paint and does not require opening up the finish. But it does not work only on the surface: it penetrates the substrate and kills the mycelium and the spores, rather than merely removing the black deposit.
The difference matters. Mechanical cleaning removes what can be seen. If the mycelium stays in the substrate, it will grow back through the same surface.
Where the boundary runs
- We do not replace a decoratorIf staining, watermarks or flaking paint remain after the mould is removed, that is restoring the finish. A decorator does that; we do not.
- Painting does not replace treatmentPainting over mould, including with anti-mould paint, seals live mycelium under the coat. Within weeks or months it comes back through, and the wall has to be repainted.
The right order: deal with the source of moisture first, then treat, and only then redecorate. In the reverse order the money spent on paint is lost.
Minimum call-out and travel zones
Travel, preparation of the work area and cleaning after the treatment are all included in the minimum. We do not charge separately for the journey.
Zone A
minimum €250- Ventimiglia
- Bordighera
- Sanremo
- Menton
- Roquebrune-Cap-Martin
- Monaco
- Beausoleil
- Cap-d'Ail
Zone B
minimum €350- Nice
- Villefranche-sur-Mer
- Beaulieu-sur-Mer
- Saint-Laurent-du-Var
- Cagnes-sur-Mer
- Antibes
If the area calculation comes to less than the minimum, the zone minimum is what you pay. If it comes to more, you pay the calculation and the minimum no longer applies.
In individual quotations for jobs of a day or more, travel costs appear as a separate line so that you can see what you are paying for.
Call-out surcharges. These do not depend on the area, so they are charged as a fixed amount rather than as a coefficient per metre:
No vehicle access to the building, equipment and water carried by hand — from €40. No water on site — from €25. Both surcharges are named in advance, from the address and your description of the access, not discovered on arrival.
What the price includes
The full cycle, from sheeting the furniture to washing the floor afterwards.
Preparation
Inspection and photographs before treatment. Moving furniture, sheeting whatever cannot be taken out. Removing or covering curtains and textiles, covering the floor under the work area. Mixing the solution, setting up the stepladder, protective equipment.
Treatment
Mechanical removal of deposit and loose material. Application of the product to the surface and the adjacent area with a margin. Dwell time as specified, removal of residues. Further passes until the visible outbreak is fully gone.
Finishing
Removing the sheeting, putting furniture and curtains back. Airing the room, washing the floor in the work area. Removing sheeting and consumables. Final inspection, photographs after treatment and recommendations.
Covering the furniture is compulsory. All furniture, textiles and appliances in the work area are covered with polythene sheeting. We work with chemical products and, when treating walls and ceilings, splashes are unavoidable — without covering, belongings would be ruined. The sheeting and the work of covering are included in the price; we do not charge extra for them.
Whatever can be taken out of the room is better taken out: it is faster and safer. If a piece of furniture can neither be moved nor covered, we say so before starting rather than partway through.
Three worked examples
Real arithmetic using the same formula. Coefficient values are taken from within their ranges according to the actual conditions on site. Note the difference between a damp room and a dry one: it explains almost the whole difference in the total.
A whole bathroom
Menton, zone A- Shower joints and corner under the ceiling2.00 m²
- Base · K5 closed room 1.20 · K6 two passes 1.50€81/m²
- Calculation: 2.00 × 81€162
- Area under the bath, awkward access1.00 m²
- Same plus K4 obstruction 1.15, capped at the upper bound€90/m²
- Calculation: 1.00 × 90€90
- Remaining surface: walls and ceiling17.00 m²
- Preventive: base 15 · K5 closed room 1.20€18/m²
- Calculation: 17.00 × 18€306
- Total€558
A damp room is treated in full. You can treat just the corner for €250, but the mould will return from the spores on the neighbouring walls — and the money will have been wasted.
Bedroom wall after a leak
Roquebrune-Cap-Martin, zone A- Patch 1.60 × 1.20 m1.92 m²
- Plus a 10 cm margin1.80 × 1.40 m
- Surface counted2.52 m²
- Base, no coefficients, one pass€45/m²
- Calculation: 2.52 × 45€113
- Zone A minimum€250
- Total€250
A dry, ventilated room with a localised leak: no need to go over the whole room. At this size it is the minimum call-out that sets the price, not the rate per metre.
Flat left closed for a long time
Nice, zone B- Ceiling and window reveals, from a stepladder6.00 m²
- Base · K1 height 1.15 · K6 two passes 1.50€78/m²
- Calculation: 6.00 × 78€468
- Walls and hallway corner, access from the floor8.00 m²
- Base, one pass€45/m²
- Calculation: 8.00 × 45€360
- Total€828
Within one flat, different surfaces run at different rates: a ceiling reached from a stepladder costs more than a wall you can reach by hand. The zone B minimum is long past here.
Identifying the cause, and our recommendations
Treatment removes mould from the surface. If the source of moisture remains, the mould comes back. So we always look over the room and tell you what we see.
What we identify visually
- Leak or infiltrationRun marks, a damp patch with a sharp edge, staining running top to bottom, finish lifting.
- CondensationEven misting, drops on pipes and cold surfaces, mould in cold corners and on window reveals.
- Cold bridgeAn outbreak following the floor slab line exactly, in the corners of external walls, right around window reveals.
- Absent ventilationNo draw at the extract grille, a stale smell, mould inside closed cupboards and behind furniture.
- Rising dampAn outbreak working upwards from the floor, salt efflorescence, plaster lifting along the bottom of the wall.
What you get
- An assessment on siteWe name the likely cause and explain which signs led us to it.
- A ventilation and humidity regimeHow often and how long to air the room, what humidity to aim for in your particular case, whether a dehumidifier is needed.
- What to do about the causeWhat you can sort out yourself, and where a specialist contractor is needed — and which kind.
- When measurements are neededIf a visual inspection is not enough we say so plainly and explain what survey to commission and what it must contain.
This is included in the price of the treatment and is not charged separately.
Limits of responsibility. Instrumented survey work — dew point measurement, surface and pipe temperatures, checking ventilation draw, thermal calculation of insulation — is not included in the treatment price and is quoted individually, from €100: the exact figure depends on what has to be measured and calculated. We do not do plumbing, roofing, insulation or ventilation work. If the cause lies there, we say so plainly and explain what to look for in a contractor's proposal.
Cleaning of premises
Offered alongside the treatment or on its own.
Cleaning after treatment and routine cleaning
Floors, dust, simple tidying, cleaning after guests or before an arrival. We do not remove construction waste and we do not replace a building contractor.
- Price per hour€25
- Minimum order3 hours
- Estimatefrom photos
What the treatment price does not include
- Opening up structures, removing grilles, cleaning ducts from the inside
- Painting, plastering, tiling and any finishing work
- Repairing leaks, plumbing, roofing, replacing insulation
- Instrumented survey, measurements and thermal calculations
- Removal of construction waste
If the work uncovers an outbreak behind the finish or behind a grille, we stop and agree the scope and price with you again.
3-month guarantee
We guarantee that the treated surface will stay clean for three months — provided the cause of the excess moisture has been dealt with.
If a leak has not been repaired, the ventilation does not work, or condensation keeps forming on the pipes, mould will return regardless of how well the treatment was done. That is not a guarantee case, and we say so before the work starts, not afterwards.
The guarantee covers the surface that was treated. If you chose to limit the work to one area in a damp room and declined the preventive pass over the rest, mould reappearing on untreated surfaces is not a guarantee case.
The period is counted by actual use of the room. Where air conditioning is involved and the system has not run during that period, no condensation has formed in the ducts, and the absence of mould is not an indicator.
How to get a quotation
From photo to written calculation, usually the same day.
Photo
Send photos of the affected area, ideally a general view and a close-up. For a bathroom or cellar, photograph the whole room, including under the bath and behind the basin.
Calculation
We give you the rate, the surface counted, the final figure and the timing. If something is unclear from the photo we ask, rather than building a margin into the price.
Quotation
Where needed we issue a written quotation with a description of the work, the areas and a line-by-line calculation.
Visit
We agree a date. On site we check it matches the photos: if the scope is smaller, we recalculate in your favour.
Common questions about price
Why can't you give an exact price without a photo?
Because the price is built from a base rate of €45/m² with coefficients for height, cramped space, obstruction, ventilation and the number of passes — and all of that is only visible in a photo. At the same square metrage, a flat wall and a corner under the ceiling behind a fitted wardrobe are different work and different time. This is quicker and more honest than naming a figure blind and then changing it on site.
Why treat the whole bathroom rather than just the affected corner?
Because if a room has a visible outbreak, spores are spread over the whole surface — including the places you do not look: under the bath, behind the basin pedestal, behind the washing machine. A very common case: someone cleans the mould in the corner above the shower, and a month later it is back, because the real outbreak was under the bath. So affected areas are treated in full, and the whole remaining surface gets one preventive pass at €15-30/m².
Does the treatment damage paint and plaster?
No. The product does not attack the finish and does not require opening up the plaster. What it does do is more than remove the black deposit on the surface: it penetrates the substrate and kills the mycelium and the spores. That is exactly why it works where ordinary cleaning lasts a fortnight.
Wouldn't it be simpler to paint over with anti-mould paint?
No. Paint applied over live mould seals the mycelium under the coat without killing it. Within weeks or months the patch comes back through the fresh paint, and the wall has to be repainted — this time over a spoiled coat. The right order: deal with the source of moisture, treat, and only then paint.
Do we need to move the furniture out?
Moving it out is not compulsory, covering it is. All furniture, textiles and appliances in the work area are covered with polythene sheeting: we work with chemical products and, when treating walls and ceilings, splashes are unavoidable. Without covering, belongings would be ruined. Sheeting and covering are included in the price. Whatever can be taken out is better taken out — it is quicker.
The patch is tiny, so why still €250?
Because travel, preparing the work area, the products and the cleaning afterwards cost the same whether the area is 0.5 m² or 3 m². The minimum covers exactly that. If you have several small areas in different rooms, it is worth doing them in a single visit: the areas add up and the minimum stays the same.
What if there is more on site than in the photo?
We stop and agree the new scope with you before carrying on. We cannot simply increase the figure at the end. The reverse holds too: if the outbreak turns out to be smaller than the photo suggested, the price is recalculated on the actual measurement.
Do you work with managing agents and letting agencies?
Yes. For managing agents, syndics and letting agencies we issue written quotations with a line-by-line calculation and before-and-after photographs — in a form that can be attached to an owner's report or to correspondence with an insurer.
Do you work in Monaco and in Italy?
Yes. Monaco is in zone A, minimum call-out €250. The Italian side — Ventimiglia, Bordighera, Sanremo — is also zone A. Paperwork is issued by Tatiana Subbotina EI, SIRET 845 294 883 00028.
If you own the property and you are not in the country
A large share of our work comes from owners who are somewhere else when the problem appears.
How it usually starts
A tenant sends a photo of a black corner. A neighbour mentions a smell. Or you open the shutters in spring and find the cellar wall covered.
You are in London, Dublin, Frankfurt or Little Rock, and you need someone on the Riviera to look at it, price it honestly and actually turn up. That is a normal working situation for us, not an exception — our very first job of this kind came from an owner in the United States whose house in Menton had mould in the cellar.
How we handle it
- Nobody needs to be present for the estimateEverything starts from photos. You or your tenant send them, we reply with the rate, the surface counted and the final figure.
- Access can be arranged with anyone you nominateA tenant, a neighbour, a concierge, a letting agency or a syndic. You tell us who holds the keys and we agree the time directly with them.
- You see the result without being herePhotographs before and after, with the areas and the line-by-line calculation, in a form you can forward to a tenant, an owner or an insurer.
- Straightforward paperworkBank transfer, invoice issued by Tatiana Subbotina EI, SIRET 845 294 883 00028. VAT not applicable, art. 293 B du CGI.
We speak English, French and Russian. Write in whichever is easiest — e-mail, SMS or WhatsApp — and mention the town, because the town sets the minimum call-out.
Send a photo and get a calculation
Send a photo of the area, your town and the approximate size. We reply with the rate, the final figure and a possible date.