WHY DOES MY
FLAT SMELL OF
CIGARETTES?

Cause 1: A Previous Tenant Smoked in the Flat

This is the most common cause of cigarette smell in a non-smoking flat. Nicotine and tar compounds from cigarette smoke absorb into every porous surface in a room — walls, ceilings, flooring, soft furnishings, curtains — and do not break down naturally. They remain embedded indefinitely, off-gassing slowly back into the air. In warm weather or when the heating comes on, off-gassing accelerates and the smell becomes much more noticeable.

Even if the flat was painted and decorated before you moved in, standard emulsion paint does not seal in nicotine compounds. The smell migrates through the new paint within weeks to months, particularly in warm conditions. This is why people often move into a flat that seemed fine and then notice cigarette smell appearing after the first summer or after the heating is first switched on.

Key characteristics of previous-tenant contamination:

• The smell is strongest near walls and ceilings, particularly in the main bedroom and living room
• The smell gets noticeably worse in hot weather or when the heating comes on
• The ceiling has a slight yellow-brown tinge or becomes noticeably yellower after you have lived there a while
• The smell is consistent throughout the day rather than coming and going
• It was not noticeable when you first viewed the flat (particularly if you viewed in winter or cool weather)

Cause 2: Smoke Coming from a Neighbouring Flat

Cigarette smoke from a neighbouring property enters your flat through air gaps: around pipes and cables in shared walls, at skirting and floor junctions, through shared ventilation ducts, and in some older conversions, through the ceiling or floor structure itself.

Key characteristics of neighbour smoke ingress:

• The smell comes and goes rather than being constant — it is stronger when your neighbour is actively smoking
• The smell is stronger at certain times of day (when the neighbour is typically home and smoking)
• The smell is stronger in one specific room — usually the room adjacent to where the neighbour smokes
• It is worse on days with low air pressure (before rain, in windy conditions)
• Other neighbours in the building have noticed the same thing

Cause 3: Thirdhand Smoke on Surfaces and Items

Thirdhand smoke refers to the residue left on surfaces and objects by tobacco smoke. Items brought in from a smoking environment — second-hand furniture, clothing, books, boxes from storage — carry thirdhand smoke compounds that off-gas into your flat.

Also relevant: if workmen, visitors or delivery people who smoke spend time in your flat, they carry smoke compounds on their clothing and hair that can deposit on your soft furnishings. The amount deposited by any single visit is small, but over time it can contribute to a detectable smell.

Key characteristics of thirdhand smoke from items:

• The smell appeared after you brought in specific items
• The smell is strongest near specific pieces of furniture or in areas where second-hand items are stored
• The smell improved after removing or airing specific items

How to Identify the Cause

Fixing Previous Tenant Contamination

For light contamination (the flat was smoked in occasionally or for a short period), thorough cleaning of walls and ceilings with sugar soap, followed by a shellac-based primer (Zinsser BIN) and repainting, can significantly reduce the smell. This seals the surface layer of nicotine into the wall rather than eliminating it, but is effective for moderate contamination.

For established contamination where the smell is significant or has been building over months, professional treatment is more effective. ULV fogging and ozone treatment neutralises the nicotine and tar compounds in the surfaces rather than sealing them in place. After professional treatment, the flat can be repainted as normal. See professional treatment options →

If you are a tenant and the flat was let to you without disclosure of a previous smoking tenancy, the landlord may be obligated to fund the remediation. This depends on whether smoking was known about and whether it was disclosed. Raise it with your landlord in writing.

Reducing Neighbour Smoke Ingress

Sealing the entry points where smoke enters your flat reduces ingress significantly:

• Seal around all pipe and cable penetrations in shared walls with fire-rated intumescent foam
• Apply flexible decorator’s caulk along skirting and floor junctions at the party wall
• Check the backdraught shutter on your bathroom and kitchen extractor fans — replace if damaged
• Use a draught excluder under any door leading to a shared corridor

For ongoing neighbour smoke ingress, see our full guide on dealing with neighbour smoke smell including your legal rights.

Your Rights as a Tenant

If you are a tenant who moved into a flat that was not disclosed as having been smoked in:

• Your landlord has an implied duty to provide the property in a condition fit for habitation
• If the cigarette smell is significant, you can argue the property was not in a habitable condition at the start of the tenancy
• Write to your landlord documenting the smell and requesting remediation — keep all correspondence
• If the landlord does not act, local council environmental health may be able to assist for extreme cases

Common Questions