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Kitchen extraction cleaning - kitchens below flats
A commercial kitchen on the ground floor of a building with flats above is common - and it carries extra weight. A fire in that kitchen threatens not just the business but the people asleep above. Keeping the extraction clean, so a fire can't spread up through the building, takes on added importance. Here is what a kitchen below residential flats means for your extraction duties. This is general information, not legal advice.
The short answer
A great many commercial kitchens - restaurants, takeaways, cafes - occupy the ground floor of buildings with flats above. It's a common arrangement, but one that carries extra weight, because the kitchen's fire risk now sits directly below people's homes. Here's what that means for the extraction. This is general information, not legal advice; a competent fire risk assessment addresses the specifics of any premises. Why the stakes are higher. A kitchen fire is always serious, but a kitchen below residential flats raises the stakes: (1) People live above. The flats are people's homes, occupied - often with people asleep at night, who may be slow to become aware of a fire below them and need to evacuate. So a fire in the kitchen threatens the lives of the residents above, not just property. (2) A fire can spread up to them. The extraction ductwork typically runs up through the building (to discharge at roof level), passing up through the structure toward or past the flats. So a grease fire in the duct can spread upward through the building - potentially reaching the residential floors, the very people it most endangers. And fire spreads readily through the building's structure and voids. So the arrangement puts a potential fire path (the duct) between the kitchen and the homes above. The duties: heightened, not new. This arrangement doesn't generally create wholly new legal duties, but it heightens the existing ones. Under fire safety law (the Fire Safety Order in England and Wales, and equivalents elsewhere), the responsible person must assess and manage the fire risk - and where residents live above, that duty carries extra weight: the fire risk assessment must take seriously the danger to the people above, and the measures to control the risk must be robust. The grease fire risk in the extraction is a central part of this (a grease-laden duct being exactly the fire path that could reach the flats). There may also be interaction with the building's overall fire safety (the residential parts, shared areas, the landlord's duties) - so coordination matters where the building is shared. Where the extraction sits in this. Keeping the extraction clean is a key part of managing the heightened risk: removing the grease from the whole system (especially the ductwork running up through the building) so a fire can't take hold and spread up the duct toward the flats. So the extraction cleaning - always important - takes on added importance below flats: it must be diligent (the whole route cleaned, no neglected grease-laden stretches), to the TR19 Grease standard, at the appropriate frequency, with the records, and the fire risk assessment should reflect the higher stakes. So a kitchen below residential flats carries extra weight on its extraction: keeping it clean protects the people above from a fire spreading up. So below flats, keeping the extraction clean matters more. This is general information, not legal advice; get a competent fire risk assessment.
Key points
Homes directly above
The reason a kitchen below residential flats carries extra weight is simple but serious: there are people's homes directly above, so a kitchen fire threatens the residents, not just the business. The flats are occupied homes - people living, and often sleeping, directly above the commercial kitchen. A fire in the kitchen is therefore not just a threat to the business's premises and property, but a threat to the lives of the residents above.
And residents above a kitchen are particularly vulnerable to a fire below them: at night they may be asleep and slow to become aware of a fire that started below, and they need to be able to evacuate safely - which a fire spreading up through the building could compromise. So the human stakes of a kitchen fire are much higher when there are homes above: it's not just about protecting property or the business, but about protecting people in their homes. This is the fundamental reason the arrangement heightens the importance of controlling the kitchen's fire risk - including the extraction. So homes directly above - a fire threatens the residents - is why the stakes are higher. The next section covers how a fire could reach them. So people above raise the human stakes of a fire. This is general information.
A fire path to the flats
What makes the danger to the residents concrete is that the extraction provides a potential fire path up toward the flats: the ductwork typically runs up through the building. In a building with a ground-floor kitchen and flats above, the kitchen's extraction ductwork has to carry the grease-laden air up and out - typically running up through the building (through risers, voids, or the structure) to discharge at roof level, above the flats. So the duct passes up through the building, toward or past the residential floors.
This matters because a grease fire in the duct can spread upward along it - so the duct is a potential route for a fire to travel from the kitchen up through the building toward the flats. A grease-laden duct running up past people's homes is exactly the kind of fire path that could carry a fire to the residents (as covered in how a duct fire spreads and how fire spreads through voids). And fire spreads readily through a building's structure and concealed spaces, which the duct passes through. So the extraction, by running up through the building, creates the very link between the kitchen's fire risk and the homes above that makes the arrangement dangerous - and makes keeping that duct clean so important. So a fire path to the flats - the duct runs up through the building - is the concrete danger. So the duct is a potential fire path to the flats. This is general information; a fire risk assessment addresses the specifics.
Duties heightened, not new
The arrangement doesn't generally create wholly new legal duties, but it heightens the existing ones - the fire-safety duty carries extra weight where residents live above. Under fire safety law (the Fire Safety Order in England and Wales, and equivalent regimes in Scotland and Northern Ireland), the responsible person must assess and manage the fire risk at the premises. That duty applies to any commercial kitchen - but where there are homes above, it carries extra weight: the fire risk assessment must take seriously the heightened danger (the residents above, who could be endangered by a fire spreading up), and the measures to control the risk must be correspondingly robust.
So the duty is the same duty (assess and manage the fire risk), but the stakes - and therefore the diligence required - are higher. The grease fire risk in the extraction is a central part of this: a grease-laden duct running up toward the flats is exactly the kind of risk the assessment must identify and the responsible person must manage. There may also be interaction with the building's wider fire safety - the residential parts, the shared structure, and the building owner's or landlord's duties for the residential accommodation - so the kitchen's fire safety doesn't sit in isolation. This is why a competent fire risk assessment, reflecting the higher stakes, matters. So duties heightened, not new - the fire-safety duty carries extra weight below flats. So the existing duty carries more weight here. This is general information, not legal advice.
Keeping the extraction clean
The key practical measure for managing the heightened risk is keeping the extraction clean - because that's what stops a fire taking hold and spreading up the duct toward the flats. The grease fire risk is the risk that the extraction becomes a fire path to the homes above - and cleaning the extraction removes the grease that would fuel and carry such a fire. So keeping the whole system clean (especially the ductwork running up through the building) means that even if a fire reached the duct, there'd be little grease for it to feed on or spread along - greatly reducing the chance of a fire reaching the flats via the extraction.
So extraction cleaning, always important, takes on added importance below residential flats: it must be diligent (the whole route cleaned, with no neglected, grease-laden stretches - especially the vertical runs up through the building), to the TR19 Grease standard, at the appropriate frequency (matched to the cooking), with the records to evidence it. And the fire risk assessment should reflect the higher stakes (the residents above) in setting the approach. This is the concrete way the kitchen protects the people above from the extraction becoming a fire path: keep it clean, thoroughly and reliably. Given the human stakes, this diligence is not a corner to cut. So keeping the extraction clean - the key measure to protect those above - is where the extra weight of a kitchen below flats falls. So keeping the extraction clean protects the residents above. This is general information; a fire risk assessment addresses the specifics.
The extra weight of homes above
So a commercial kitchen below residential flats carries extra weight on its extraction: because a fire threatens the people asleep above, and the duct running up through the building is a potential path for a fire to reach them, keeping the extraction clean - thoroughly, to standard, at the right frequency, with records - takes on added importance as the key measure to protect the residents above. So the extra weight of homes above: diligent cleaning, for the people upstairs.
The through-line is that the same extraction cleaning that any commercial kitchen needs becomes more important, and less forgiving of neglect, when there are homes above - because the consequences of a fire (and of a neglected, grease-laden duct that lets one spread up) are so much graver. So a kitchen below flats should treat its extraction cleaning with particular seriousness: on a proper schedule, to TR19 Grease, cleaning the whole route (including the vertical runs), with the records, informed by a fire risk assessment that takes account of the residents above - and, where the building is shared, coordinated with the building's wider fire safety. This isn't a new set of rules so much as a heightened duty of care toward the people upstairs, discharged largely through keeping the fire risk (the grease) controlled. So carry the extra weight of homes above through diligent extraction cleaning - for the people upstairs. So clean diligently to protect the residents above. This is general information, not legal advice; get a competent fire risk assessment.
Questions
The duties are heightened rather than wholly new - the responsible person's existing duty to assess and manage the fire risk carries extra weight where residents live above, with the extraction grease risk a central part. Under fire safety law, the responsible person must assess and manage the fire risk at any commercial kitchen. Where there are residential flats above, this existing duty carries extra weight: the fire risk assessment must take seriously the heightened danger to the residents (who could be endangered by a fire spreading up), and the control measures must be robust. The grease fire risk in the extraction is central - a grease-laden duct running up toward the flats is exactly the risk to manage. There may also be interaction with the building's wider fire safety (the residential parts, the landlord's duties). So it's the same duty, but with higher stakes and required diligence. A competent fire risk assessment addresses the specifics. So the duties are heightened, centred on managing the fire risk including the extraction. So heightened, not new. This is general information, not legal advice.
Because there are people's homes directly above - occupied, often with people asleep - so a fire threatens their lives, and the extraction duct running up through the building can spread a fire toward them. A kitchen fire below residential flats is more serious for two linked reasons. First, the human stakes: the flats are occupied homes, with people living and sleeping directly above, who could be endangered by a fire below (and at night may be slow to become aware and need to evacuate). So a fire threatens lives, not just property. Second, the fire can reach them: the extraction ductwork typically runs up through the building (to discharge at roof level), so a grease fire in the duct can spread upward toward the flats. So the arrangement puts a potential fire path (the duct) between the kitchen and the homes above. Together, these make a kitchen fire below flats a grave risk to the residents - which is why controlling it (keeping the extraction clean) matters so much. So it's more serious because it threatens the residents above. This is general information; a fire risk assessment addresses specifics.
Via the extraction ductwork, which typically runs up through the building - a grease fire in the duct can spread upward along it toward or past the residential floors, and through the building's structure and voids. In a building with a ground-floor kitchen and flats above, the extraction duct carries the grease-laden air up and out - typically running up through the building (through risers, voids or the structure) to discharge at roof level, above the flats. So the duct passes up through the building toward the residential floors. A grease fire in that duct can spread upward along it (feeding on the grease), and fire spreads readily through the building's structure and concealed spaces that the duct passes through - so a fire that started in the kitchen can travel up toward the flats. This is the concrete danger a kitchen below flats poses, and why keeping the duct clean (removing the grease that would fuel and carry a fire) is so important. So a fire can reach the flats via the duct running up through the building. So up the duct through the building. This is general information; a fire risk assessment addresses specifics.
Keep it diligently clean - the whole route (including the vertical runs up through the building) cleaned to TR19 Grease at the appropriate frequency, with records - and have a fire risk assessment reflecting the higher stakes of the residents above. The key measure is keeping the extraction clean, done with particular diligence given the homes above. That means: cleaning the whole system, especially the ductwork running up through the building, to the TR19 Grease standard (so no grease-laden, unreachable stretches remain to fuel and carry a fire toward the flats); at the appropriate frequency for the cooking (a proper schedule); with the records to evidence it. And it means a competent fire risk assessment that reflects the heightened stakes (the residents above) in setting the approach. Where the building is shared, coordinate with its wider fire safety. So a kitchen below flats should clean its extraction diligently and thoroughly, informed by a proper fire risk assessment. So keep the extraction diligently clean, whole-route, with records. So clean it diligently, whole-route. This is general information, not legal advice.
The kitchen operator is responsible for their extraction's fire risk; but the building owner/landlord has duties for the residential parts and structure, so responsibilities can be shared - and coordination and clear lease terms matter. The commercial kitchen operator is responsible for the fire risk from their cooking, including keeping their extraction clean - so they arrange and are accountable for the extraction cleaning. But in a mixed building (commercial below, residential above), the building owner or landlord has fire-safety duties for the residential accommodation and the shared structure - so the overall fire safety involves both. And where the extraction duct runs up through the shared building, access and responsibilities for it may involve the landlord, and should be clear (in the lease and arrangements). So responsibility for the extraction is primarily the operator's, but sits within a shared-building context where coordination with the landlord matters (as covered in landlord vs tenant duties and the lease pages). So the operator is primarily responsible, coordinating with the landlord for the shared building. So mainly the operator, with landlord involvement. This is general information, not legal advice; check your lease.
Not automatically - the frequency is still set by the cooking (the grease loading) - but the higher stakes mean the cleaning must be especially diligent and reliable, and the fire risk assessment may support a cautious interval. The right cleaning frequency is set by how fast the cooking loads the extraction with grease (the risk-based approach) - so a kitchen below flats isn't automatically on a shorter interval just for being below flats; a light kitchen still loads slowly. But the heightened stakes (the residents above) mean two things: the cleaning must be done especially diligently and reliably (no missed or skimped cleans, the whole route done - because the consequences of neglect are graver), and the fire risk assessment, taking account of the residents above, may support a cautious, well-controlled interval and thorough approach. So the frequency is still risk-based (matched to the cooking), but the diligence and reliability are heightened, and the assessment reflects the stakes. So not automatically more often, but especially diligent - and the assessment may favour caution. So the frequency is risk-based, but the diligence is heightened. This is general information; the frequency should be risk-based.
A kitchen below flats has homes above and a duct running up through the building. We clean the whole route to TR19 Grease - removing the grease so a fire can't spread up toward the residents - with the records to evidence the risk is managed. Ask us about diligent extraction cleaning below residential flats. This is general information, not legal advice; get a fire risk assessment.
