Short answer: Commercial cold room installation in the UK typically costs from around £4,000 for a small walk-in chiller, £8,000 to £20,000 for a medium chilled room and £6,000 to £25,000 or more for a walk-in freezer, with £1,000 to £5,000 on top for groundwork, drainage and power. Most internal cold rooms need no planning permission, but the refrigerant you specify now is a 10 to 15 year decision, and the GB HFC quota tightens on 1 January 2027. That single choice will do more to your future running and repair costs than anything else on the quote.
Almost every cold room buying guide online talks about size, panel thickness and price. Those matter, and they are also the easy part. What makes a cold room expensive to own is the gas inside it.
A cold room installed in 2026 will still be running in 2036 or later. The refrigerant your installer specifies determines what it costs to service, whether spare gas is available when it leaks, and whether a repair in year eight is routine or a reason to rip the whole thing out. Great Britain’s regulatory position on that gas moved in May 2026, and most published guidance has not caught up.
This guide covers installation costs, sizing, refrigerant selection for a system bought today, the planning position, what a proper handover pack contains, and how to judge whether an existing room should be repaired or replaced.
Installation cost is driven by refrigeration duty, not floor area. Two rooms of identical size can differ substantially in price depending on setpoint, product throughput and how often the door opens.
Current UK market bands, based on published 2026 installer pricing, look like this:
Read those bands carefully, because they span different sizes and therefore overlap. A small freezer can cost less than a medium chilled room simply because it is smaller. Compare like with like and a freezer always costs more: expect a premium in the region of 10 to 20 per cent over a chilled room of the same volume, and more where floor protection is involved.
The reason is physics rather than margin. A chiller works across a small temperature lift and typically runs at a coefficient of performance of around 2.5 to 3.5. A freezer works across a much larger lift and typically manages around 1.5 to 2.2, so it needs more plant, thicker insulation and protection against the ground freezing beneath it.
Two things to watch on any quote. Check whether the base, drainage and electrical connection are included, because that is where cheap quotes hide their omissions. And treat the install price as the entry fee, since the room draws electricity around the clock for a decade or more and the specification you sign off decides that bill. Refrigeration plant and panels count as plant and machinery for capital allowances, so speak to your accountant before you assume the cost is simply cost.
Cold rooms are sized on heat load, measured in kilowatts of cooling, calculated from your product throughput, target setpoint, door traffic and the ambient conditions around the room. Floor area alone is not a specification.
Heat load is the sum of five things: the product you bring in and hold, heat leaking through the panels, warm air admitted every time the door opens, fan and lighting gains inside the room, and the energy the defrost cycle puts back in. A butcher taking in warm carcasses has a very different load profile from a dry goods chiller opened twice a day at the same volume.
Get it wrong in either direction and you pay. Undersized plant never quite reaches setpoint, runs continuously and wears out early. Oversized plant short cycles, wasting energy and shortening compressor life.
Panels are PIR insulated sandwich construction, normally to EN 14509 with a fire classification under EN 13501-1. Thickness follows setpoint:
Under specifying insulation to shave the install price is a false economy that lasts as long as the room does. The panel is the cheapest efficiency you will ever buy, and it never needs servicing.
One detail catches people out on freezers. A slab held below zero gradually freezes the subgrade beneath it, ice lenses form, and the slab heaves and cracks. Any freezer sitting on a ground bearing slab therefore needs under floor heater tape, or a ventilated raised floor as the alternative. Insulation alone slows heave rather than preventing it, which is why the heating cable sits under the insulation rather than instead of it. Freezers on a suspended or upper floor slab are a different case. If a ground floor freezer quote does not mention floor protection, ask why.
This is the question that defines your ownership costs, and the one most cold room guides skip.
Great Britain still operates the retained version of EU Regulation 517/2014. The EU replaced that with Regulation 2024/573, which applies in the EU and Northern Ireland but has not been adopted in England, Scotland or Wales. If you are reading a guide that applies the new EU bans to your cold room in Kent, it is describing the wrong jurisdiction.
Here is what changed recently. Defra consulted between November and December 2025 on tightening the GB HFC phasedown. On 15 May 2026, after assessing 137 responses, Defra confirmed it would not legislate in 2026 to change the phasedown steps from 1 January 2027, and that the existing step in Annex 5 of the retained F-Gas Regulation continues to apply. Defra restated its commitment to ambitious reform, with a response report and next steps due later in 2026.
That cuts both ways. No new legislation lands on your 2027 installation, so anyone telling you to rush a purchase ahead of a January 2027 legal change is wrong. But the scheduled Annex 5 step still arrives, dropping the GB HFC quota from the 31 per cent step that has applied since 2024 to the 24 per cent step for 2027 to 2029. Less quota means the familiar HFC blends get scarcer and dearer, and the direction of travel beyond that is only downward.
The practical consequence is simple. Specify a gas that will still be sensible to service in 2035. GWP figures below are the AR4 values used for HFCs in the retained GB regulation.
R290 and R744 are natural refrigerants and sit outside the F-Gas quota system altogether, which is precisely why they are the safe long term choice.
For most commercial cold rooms in Kent and London, a well designed R290 monobloc or a CO2 system is now the sensible default rather than the adventurous choice. R290 is standard on new self contained commercial refrigeration from manufacturers including Foster and Tefcold, and typically uses less energy than the HFC equivalent. Its flammability classification is a design and ventilation consideration for a competent installer, not a reason to avoid it.
If a quote puts a high GWP HFC into a brand new room, ask the installer to justify it in writing against a 15 year service life.
Usually not for the room itself. Cold rooms built inside an existing building are generally treated as internal fit out. Building Regulations may still apply depending on what the work touches, such as structure, fire compartmentation, drainage or electrical installation.
Check with your local authority where you have:
Condensing unit noise generates more complaints and enforcement than anything else on a cold room job. Get the acoustic position considered at design stage rather than after the first neighbour letter arrives. The same thinking drives our air conditioning installed without hot works service for sites with restrictive conditions.
Lead times below reflect typical UK market timings for modular rooms.
This is the part buyers most often fail to demand, and the part that protects you at your next inspection. Insist on all of it in writing before you sign off:
Validation matters because a display panel is a single sensor. We regularly find rooms reading 4°C that sit at 7°C or higher in the warmest corner. Under the Food Safety and Hygiene (England) Regulations 2013 it is an offence to keep food likely to support the growth of pathogens or the formation of toxins above 8°C, subject to limited exemptions such as the short display tolerance. Official guidance recommends setting chillers to 5°C or below. That 3°C working buffer only exists if the whole room holds temperature.
Once the room is live, ongoing duties take over. Our guide to cold room maintenance sets out service intervals, the checks your own staff should run and how the F-Gas leak check thresholds work.
Most cold room faults are repairs. Panels normally outlast the refrigeration plant by a wide margin, so a room with sound insulation and a tired compressor is a plant replacement rather than a rebuild.
The faults our engineers attend most often, and what they usually mean:
The decision gets genuinely difficult in 2026 where refrigerant is concerned. A 2010 room on R404A is a different proposition from the same room on R134a, because the gas is the constraint rather than the parts.
The honest framing is this. If you are spending money on repeated leak repairs to a high GWP system, you are buying time at an increasing price. Put the numbers side by side, including energy, gas cost, callout frequency and stock loss risk, before you approve the third repair.
A cold room failure is also rarely just a repair bill. A full room of spoiled stock, an emergency callout at out of hours rates and lost trading can exceed the annual cost of a maintenance agreement in a single incident. That is the practical case for a planned maintenance agreement rather than a purely reactive arrangement: contract customers get priority response, and faults get caught at the warning sign stage. We run a 24/7 emergency callout service across Kent and London alongside planned maintenance.
Four checks before you accept any quote:
Kinlochs & Son have worked in refrigeration and air conditioning from Rochester since 2000. We are REFCOM registered, our engineers are trained to current mandatory F-Gas requirements, and we design, install, maintain and repair cold rooms from under counter chillers to large freezer rooms. Our clients include national restaurant groups and Gillingham Football Club, and we cover Kent, London, Sussex, Surrey and Essex from our base on Medway City Estate.
How much does a cold room cost to install in the UK? Small walk-in chillers start from around £4,000, medium chilled rooms run £8,000 to £20,000 and walk-in freezers £6,000 to £25,000 or more. Groundwork, drainage and power typically add £1,000 to £5,000. Price is driven by refrigeration duty rather than floor area, so a survey is the only way to get a real figure.
Do I need planning permission for a cold room? Internal cold rooms generally do not. External rooms, anything over about three metres tall, condensing units near public space or boundaries, and installations on listed buildings or in conservation areas should all be checked with your local authority. Building Regulations may apply regardless.
How long does cold room installation take? Modular panel lead times are typically four to five weeks, with installation taking one to three days for small rooms and several days to several weeks for larger or bespoke ones. Bespoke design work can add six to eight weeks before manufacture starts.
What refrigerant should a new cold room use in 2026? R290 propane for monobloc and smaller systems, or CO2 for larger installations. Both are natural refrigerants with no HFC quota exposure. HFC blends such as R449A still work but face tightening supply as the GB quota drops to the 24 per cent step on 1 January 2027.
Can an old cold room be repaired or does it need replacing? Most faults are repairs. Panels usually outlast the plant, so a failed compressor in a sound room is a plant replacement. Replacement becomes the better answer when panels have taken water, when the room can no longer meet the load, or when repeated leaks on a high GWP refrigerant like R404A make each repair progressively less economic.
What panel thickness do I need for a freezer? Typically 120mm to 200mm for a walk-in freezer at -18°C to -25°C, against 80mm to 120mm for a chilled room. A freezer on a ground bearing slab also needs under floor heater tape, or a ventilated raised floor, to prevent frost heave cracking the slab.
Who can legally install a cold room? Any work on the refrigerant circuit must be carried out by an F-Gas certified engineer working for an F-Gas certified company. Panel erection does not require certification, but commissioning, charging and leak testing does.
Does a new cold room come with an F-Gas record? It should. Your installer must label the system and provide the refrigerant type and charge in kilograms and tonnes CO2 equivalent, from which your legal leak check frequency is calculated. If you were not given this at handover, ask for it now, because records must be kept and produced on request.
A cold room is a fifteen year purchase made on a single afternoon’s decisions. Size it from real throughput, insulate it properly, specify a refrigerant that will still be economic to service in a decade, and get a handover pack that stands up to inspection.
If you are planning a new room, replacing a failed one, or unsure whether your current room is worth repairing, we will survey the site, calculate the duty and quote against a specification we can justify. We handle cold room installation, maintenance and repair and wider commercial refrigeration across Kent and London, and we offer finance options where the capital cost needs spreading.
Call 01634 290999 (Kent) or 020 3319 3599 (London), or request a free quote online.
If your cold room failed tomorrow, do you know what refrigerant is in it and whether that gas is still readily available?