Change of use for commercial property explained

Change of use is the planning process of altering what a building or piece of land is lawfully used for. For industrial property it is one of the most valuable and most misunderstood levers an owner has: a tired general industrial works repositioned as a trade and distribution estate, a yard consented for open storage, a redundant unit converted to another use entirely, can all create value that the bricks alone never would. But change of use is governed by a precise set of planning rules, and getting them wrong can mean an unlawful use, a worthless valuation premium and an enforcement risk.

This guide explains when a change of use needs planning permission, what actually triggers one, how Class E and permitted development affect the answer, how to apply, and, the part that matters most to our clients, how the financing gap between buying at current-use value and realising consented value is bridged. We arrange that finance on industrial and commercial property as a broker and introducer, not a lender, and we are not planning consultants or solicitors. Everything here is general information; take advice from a planning consultant on the specific building and use.

How do I change the use of a commercial property?

The starting point is to establish the current lawful use and the use you want, then ask whether moving between them is development at all. If both uses sit within the same use class, for example two uses both within Class E, the move is not development and needs no permission, subject to any conditions on the original consent. If the move is between classes, or out of a class into sui generis, it is generally a material change of use that needs permission, unless a permitted development right covers it.

1. Confirm the current lawful use

   Search the local planning authority register and, where unclear, obtain a certificate of lawful existing use. Do not assume the use from what is happening on site.

2. Identify the target use and class

   Establish which class the intended use falls into, and whether a planning condition restricts the unit to something narrower than its class.

3. Check for a permitted development right

   Some changes between B2, B8 and E(g)(iii) are permitted within floorspace limits, and Class MA allows Class E to residential subject to prior approval. Confirm none is removed by Article 4.

4. Apply for permission where needed

   Where the change is material and unpermitted, apply to the council, with a planning statement and any transport, noise or amenity assessments the case requires.

Because the answer turns entirely on the specific lawful use, the conditions on it and the current state of permitted development rights, this is not a process to run from a checklist alone. A planning consultant will establish the position quickly against the planning register, and on a purchase your solicitor raises the planning enquiries that lenders' solicitors require. Our guide to the B8 use class and the existing use classes guide cover which moves are which.

What triggers a change of use?

A change of use is triggered by a material change in the character of the use of land or buildings, judged as a matter of planning fact and degree. It is not triggered by a change of tenant, a change of trading name or a change of business owner if the underlying use stays the same. A warehouse let to a new logistics operator is still B8; a warehouse where storage gives way to significant manufacturing may have become partly B2. The question is always what is actually being done, and whether its planning character has materially shifted.

Intensification is a recurring trigger that catches owners out. A use can become a different use through scale: a modest vehicle repair operation passing the residential amenity test might be E(g)(iii), but the same site turned into a heavy commercial operation with spraying and significant emissions could be B2 or even sui generis. Adding a dominant retail element to a trade counter, expanding open storage beyond what B8 covers, or introducing a waste activity can each tip a use across a class boundary even though no one applied to change anything.

How does Class E and permitted development affect change of use?

The 2020 creation of Class E gave commercial property a wide internal flexibility: movement between uses within Class E, including E(g)(iii) light industrial, offices, research, retail and many others, is not development and needs no permission. For a class E industrial unit that is a genuine advantage, because the space can follow demand without a planning application, which is part of why hybrid and flexible units have become attractive. But the flexibility is bounded, and the bounds matter as much as the freedom.

Three things commonly narrow Class E flexibility in practice. Planning conditions on the original consent can restrict a unit to a use far narrower than its class, and such conditions are common on employment estates precisely because councils feared Class E would erode industrial land into retail and leisure. Article 4 directions can remove permitted development rights across an area. And separate rights such as Class MA, which allows Class E to residential subject to prior approval, size limits and conditions, carry their own qualifying tests and exclusions. So a class E label is a wide door with several possible locks on it, and each lock needs checking on the specific unit.

Common industrial change-of-use routes and whether permission is needed

Change	Route	Permission needed?
Within Class E, e.g. light industrial to office	Not development	No, subject to conditions
B2 to B8, or B8 to B2	Permitted development, within limits	Prior approval or notification may apply; conditions can override
E(g)(iii) to B8	Permitted development, within floorspace limits	Subject to limits and Article 4
Class E to residential	Class MA, prior approval	Prior approval required, with size limits and exclusions
Into or out of sui generis	Full application	Yes, almost always

How does a change of use application work?

Where the change is material and unpermitted, you apply to the local planning authority for permission for the change of use. The application is decided against the development plan and material considerations: employment land policies, traffic and parking, noise and neighbour amenity, and increasingly the council's industrial land supply position, because many authorities resist losing industrial floorspace. Supporting documents typically include a planning statement and, where relevant, transport and noise assessments and drawings of any physical works.

Determination targets are eight weeks for minor applications, longer in practice where committees, consultations or section 106 negotiations intervene. The conditions attached to a consent deserve as much attention as the decision itself, because hours-of-use, vehicle movement or occupier-type conditions written to protect neighbours can quietly narrow the asset's market for decades. A planning consultant earns their fee twice on a change of use: once securing the consent, and once keeping its conditions workable for the intended occupier and any future one.

Conditions on a change of use consent can narrow an asset's market for decades, so they deserve as much attention as the permission itself.

How easy a change is to obtain depends entirely on the direction and the local policy context. Changes that retain or intensify employment use in a strong industrial market are often straightforward; changes that take floorspace out of industrial use, or from commercial to residential, can be contested even where a permitted development route exists, because local plans increasingly protect employment land. Treat each case on its facts and on the specific authority's stance.

How is the planning gap financed?

The financing problem at the heart of change of use is timing. A buyer acquiring a unit whose value depends on a consent not yet granted cannot normally raise term debt against the hoped-for use, because the valuation supporting a commercial mortgage reflects the lawful use as it stands today. The standard solution is to fund the acquisition with shorter-term money that lends against the asset as it is, secure the consent, and then refinance onto term debt against the higher consented value.

Bridging finance suits this because it prices and underwrites against the asset and an exit, not against future income, and it can complete quickly. The exit is the refinance or sale once consent transforms the value. Our bridging finance page explains the structure, and our commercial mortgage page covers the term debt that takes out the bridge. Where the change of use is accompanied by significant building works rather than a simple use switch, development finance may be the better tool.

Most lending of this kind to companies is unregulated. Where a loan would be secured on a borrower's home or otherwise falls within the FCA perimeter, it is regulated and we refer it to an authorised firm. We arrange both ends of the change-of-use structure regularly across a panel of bridging and term lenders; the planning risk in the middle is for the borrower and their advisers to manage. See also our guide to how to buy an industrial unit for the wider acquisition process.