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Kitchen deep cleaning - dark kitchens
A dark kitchen packs several food businesses into one building, sometimes sharing extraction, spaces and services between them. That sharing raises a question a standalone kitchen never faces: when responsibility is split, who makes sure the whole site actually gets cleaned?
The short answer
A dark or ghost kitchen houses multiple food operators on one site, often sharing extraction, communal areas and services. That shared arrangement splits cleaning and hygiene responsibility between the operators and the site operator, and where the split is unclear, parts of the site - especially shared extraction and communal spaces - can fall between duties and go uncleaned. Making sure the whole site is genuinely cleaned means clarifying who is responsible for what, so no shared part is left as nobody's job.
What a dark kitchen shares
A dark kitchen - also called a ghost or cloud kitchen - is a site built to house several food businesses producing for delivery, often with individual kitchen units under one roof and a range of shared infrastructure between them. Depending on the setup, operators may share extraction systems, communal preparation or storage areas, waste facilities, and building services. It is an efficient model, but it means the hygiene and cleaning of the site is not the responsibility of a single occupier the way a standalone kitchen is.
That shared structure is the root of the complication. In a standalone kitchen, one operator is responsible for cleaning everything. In a dark kitchen, responsibility is divided - each operator for their own unit, the site operator for the shared and communal parts, and shared systems like extraction sitting in between. The question of who cleans what is genuinely more complex, and unlike a single kitchen, there is real scope for parts of the site to be no one's clear responsibility - which is exactly where cleaning gaps open up.
Where responsibility splits
Responsibility in a dark kitchen typically divides along the lines of what each party controls. Each food operator is responsible for the cleaning and hygiene of their own unit - the space they occupy and use. The site operator is usually responsible for the communal and shared areas, and for the building and its services. In between sit the genuinely shared systems, most notably shared extraction, where the duty may be split, assigned to the site operator, or unclear depending on the arrangements - and that in-between zone is the problem area.
The difficulty is that these arrangements are not always spelled out clearly, and each party may assume another is dealing with the shared parts. An individual operator focuses on their own unit and may reasonably assume the shared extraction and communal areas are the site's responsibility; the site operator may assume the operators handle more than they do. Where the split is not clear and agreed, the shared parts are exactly what falls through - each party thinking it is someone else's job, so it becomes no one's. Clarity about who is responsible for what is the whole game.
Why the gaps are dangerous
The gaps that open up in a shared site are not trivial, because of what tends to fall into them. Shared extraction is the clearest danger: a kitchen extract serving multiple operators still accumulates grease and carries fire risk, and if responsibility for cleaning it is unclear, it can go uncleaned while every operator assumes someone else has it. That is a building-level fire risk sitting in exactly the shared system most likely to be no one's clear duty - a serious exposure created purely by the ambiguity of responsibility.
Communal areas carry the hygiene version of the same problem. Shared preparation, storage and waste areas that fall between duties can go inadequately cleaned, becoming a contamination and pest risk that affects every operator on the site - because contamination in a shared space does not respect unit boundaries. In a dark kitchen, one operator's hygiene can be undermined by a shared area that nobody is properly cleaning. The shared nature that makes the site efficient also means an uncleaned shared part is a risk imposed on everyone, not just whoever should have cleaned it.
Making sure nothing is missed
The way to run a dark kitchen cleanly is to make the responsibility explicit and make sure every part is covered. That means establishing clearly, ideally in the site arrangements, who is responsible for cleaning which parts - each operator's units, the communal areas, and crucially the shared systems like extraction - so there is no zone that is undefined. Where shared extraction is involved, it is often most sensible for it to be cleaned as a whole under a single clear responsibility, rather than fragmented, because a shared system cleaned in disconnected pieces leaves gaps.
For an individual operator, the practical step is not to assume - to confirm what you are responsible for and what the site handles, and to satisfy yourself that the shared parts that affect you, especially shared extraction, are actually being cleaned by someone on a proper cycle. For a site operator, it is to define the responsibilities clearly and ensure the communal and shared systems are genuinely covered. Either way, the goal is that no part of the site is left as nobody's job - which, on a shared site, is the specific failure that clear responsibility prevents.
The takeaway
A dark kitchen splits what a standalone kitchen keeps whole: several operators share one site, often with shared extraction, communal areas and services, so cleaning responsibility is divided between the operators and the site operator. Where that split is unclear, the shared parts - shared extraction above all - can fall between duties and go uncleaned, creating a building-level fire risk and a shared hygiene risk that affects everyone on the site.
The defence is clarity. Establishing explicitly who is responsible for cleaning which parts, covering the units, the communal areas and the shared systems, and confirming that the whole site is actually being cleaned by someone, is what stops any part becoming no one's job. For operators and site operators alike, a shared site is only kept genuinely clean when the shared responsibility is made clear and complete - because on a dark kitchen site, the uncleaned part is almost always the one everybody assumed belonged to somebody else.
Questions
It houses several food operators on one site, often sharing extraction, communal areas and services. That splits cleaning responsibility between the operators and the site operator, so the hygiene of the site is not one occupier's job the way a standalone kitchen is.
Typically each operator is responsible for their own unit, the site operator for communal and shared areas, and shared systems like extraction sit in between - where the duty may be split, assigned to the site, or unclear depending on the arrangements.
Because of what falls into them. Shared extraction that no one clearly owns still accumulates grease and fire risk and can go uncleaned; shared communal areas can become a contamination and pest risk affecting every operator - risks created purely by unclear responsibility.
Usually shared extraction. A kitchen extract serving multiple operators still carries grease and fire risk, and if responsibility for cleaning it is unclear, it can go uncleaned while every operator assumes someone else has it - a building-level fire risk.
By not assuming - confirming what they are responsible for and what the site handles, and satisfying themselves that the shared parts affecting them, especially shared extraction, are actually being cleaned by someone on a proper cycle.
By making responsibility explicit - establishing clearly who cleans which parts, including the shared systems, so no zone is undefined - and confirming the whole site is actually being cleaned. Shared extraction is often best cleaned as a whole under one clear duty.
We deep clean dark kitchen sites including the shared extraction and communal areas that fall between operators - covering the whole site so nothing is left as nobody's job.
