Professional Odour Removal in London
Remove cigarette smoke, pet odours, mould, damp smells and fire damage using a multi-stage treatment process.
What is Ozone?
Ozone (O3) is a powerful oxidizing gas composed of three oxygen atoms. Naturally occurring in the environment, ozone forms through electrical discharges such as lightning and UV radiation in the upper atmosphere. Known for its strong disinfecting properties, ozone is an effective tool for eliminating various microorganisms and contaminants.

Properties and Benefits of Ozone
- Strong Oxidizing Agent: Ozone is one of the most potent oxidizers, allowing it to effectively break down the cell walls of bacteria, viruses, mold, and mildew.
- Eco-Friendly: Unlike many chemical disinfectants, ozone leaves no harmful residues. After performing its function, ozone decomposes back into oxygen, making it safe for the environment.
- Broad-Spectrum Disinfection: Ozone is effective against a wide range of microorganisms, including pathogenic bacteria, viruses, mold spores, and fungi.
- Penetrative Ability: Ozone can penetrate hard-to-reach areas such as cracks and pores, ensuring thorough disinfection of surfaces and air.
Applications of Ozone
Ozonation is used in various settings due to its unique disinfecting properties:
- Residential and Commercial Spaces: Ozonation helps eliminate unpleasant odors, mold, and harmful microorganisms in homes, offices, hotels, and other buildings. It is also effective for disinfecting HVAC systems.
- Medical Facilities: Hospitals and clinics use ozone to disinfect operating rooms, patient rooms, and medical equipment, reducing the risk of hospital-acquired infections.
- Automobiles: Ozonation of vehicle interiors removes odors caused by smoking, pets, or mold, and kills bacteria and viruses.
- Food Industry: Ozone is used to disinfect facilities, equipment, and even food products, extending their shelf life and ensuring consumer safety.
- Water Treatment: Ozone effectively purifies drinking water, swimming pools, and wastewater by killing pathogens and removing contaminants.
Why odours often return?
Many companies rely on ozone treatment alone.
In our experience, this is often not enough.
Persistent odours such as cigarette smoke, cooking smells, mould and pet urine leave microscopic contamination on walls, ceilings, furniture and soft furnishings.
Unless this contamination is removed first, the smell often returns after treatment.
That’s why we focus on eliminating the source of the odour – not just masking it.
Prices for Odour Removal in London
Our Treatment Options
| Essential Treatment | Advanced Treatment | Complete Odour Remediation |
| Suitable for properties that have already been professionally cleaned. Includes: ✓ ozone treatment Ideal for light odours recently cleaned properties | Includes: ✓ professional ULV fogging ✓ ozone treatment Recommended for cigarette smoke cooking smells pet odours | Includes: ✓ manual cleaning ✓ specialist chemicals ✓ ULV treatment ✓ ozone treatment ✓ final air purification Recommended for heavy cigarette contamination mould long-term odours fire damage |
| from £495 | from £850 | from £1800 |
Prices for Ozonation of Office Spaces
| Office Size | Odor Removal price |
| up to 50 m² | £8/m² |
| 50 to 100 m² | £7/m² |
| 100 to 300 m² | £4/m² |
| 300 to 500 m² | £3/m² |
| 500 to 1000 m² | £2.2/m² |
| over 1000 m² | negotiable |
Important Information
No company can guarantee complete odour removal unless the source of the smell has been eliminated.
For example:
– Ongoing leaks,
– Hidden mould,
– Contaminated insulation,
– Heavily saturated building materials
All this will require repair or replacement before treatment.
We will always advise you honestly before any work begins.

Get a Quote
Ready for a spotless space? Contact us today and experience the O3Cleaning difference!
