Retail units

Retail unit lighting and EPC upgrades

A retail unit is the one building type where lighting is not purely a cost line. The display lighting is part of how the shop sells, so the occupier has a strong view about colour, contrast and the look of the fitting that an FM in a warehouse does not. That changes the conversation, and it changes which parts of the job are easy to agree.

Schematic drawing, not to scale. Drawn to show where the decision sits rather than to represent a specific building.

Usually the tenant for display lighting and the landlord for the shell, which pulls in opposite directions.

Two jobs, two paybacks

Front of house and back of house are genuinely different projects in the same unit.

Display and accent lighting at the shopfront: high output, long trading hours, and a specification driven by how the merchandise needs to look. Fast payback because the hours are long, but the occupier has to be happy with the light.
Ambient, stockroom and rear-of-unit lighting: nobody is merchandising here, the specification is straightforward, and this is where a retrofit is easiest to agree and quickest to deliver.

Starting at the back is often the way to get a retail scheme moving, because it needs no aesthetic sign-off and still cuts a meaningful share of the load.

Trading hours do the work

Retail runs long, consistent hours, often seven days, and frequently with lighting left on outside trading for display reasons. That makes the saving per fitting larger here than in a building used nine to five, and it makes crude time scheduling unusually effective — the biggest single waste in many units is simply lighting running when the shop is shut and nobody is looking in the window.

An empty small retail unit, with brighter display lighting toward the shopfront and dimmer ambient lighting at the rear. — Illustrative image generated with AI. Not a photograph of a building we have worked on.

The landlord and tenant problem, retail version

On a let unit the landlord holds the compliance obligation and the tenant owns the shopfit, which commonly includes the display lighting. The landlord cannot improve the part of the lighting that matters most without the tenant agreeing, and the tenant has no particular incentive to improve a certificate they do not hold.

Lease events are where this gets resolved. A unit between tenancies is a landlord opportunity, and a shopfit is the moment to get the specification right rather than to inherit whatever the last occupier installed.

The glazed frontage

A large single-glazed shopfront is a meaningful part of a small unit, and it is usually the fabric element the model notices most. It is also often the element that cannot be changed, whether for planning, listing or shopfront design reasons. That is worth knowing early, because it can cap what the unit can reach regardless of how good the lighting becomes.

Questions we get asked

Will changing shop lighting change how the products look?

It can, which is why the specification matters more here than in any other building type. Colour temperature and colour rendering are the two things to agree with the occupier before anything is ordered, rather than after it is installed.

Can a landlord improve the rating of a let retail unit?

Partly. The shell and any landlord-owned services are available; the shopfit usually is not without the tenant agreeing. In practice the landlord work happens at a void or a re-letting.

Is it worth upgrading just the stockroom?

Often yes as a first step. It needs no aesthetic sign-off, it is quick, and in units with large back-of-house areas it covers a real share of the lighting load.

Last updated 8 October 2026.

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