Budgeting a change of use application for a business

The least expensive change of use application is the one you never have to make, so the first money you spend should go on establishing the lawful use of the premises. Movement within Class E is not development, which means a unit lawfully in use as a shop, a cafe, an office, a gym, a clinic or a nursery can become any of those others without an application and without a fee.

That check costs an hour of somebody's time and settles the whole change of use application cost question for a good proportion of small business lettings.

Start with the use class, because it may cost nothing

Four things to establish before you sign anything.

The lawful use, from the planning history of the unit rather than from what the agent's particulars say. A unit marketed as retail may be lawfully a hot food takeaway, which is sui generis and outside Class E entirely.

Any condition restricting the use. Where a permission limits the unit to a specific purpose, that condition continues to apply and overrides the freedom the order would otherwise give, so a section 73 application is needed to vary it.

Any article 4 direction in force. Authorities can withdraw permitted development rights, including movement within Class E in a defined area, and some have done so to protect retail or office floorspace.

Whether the proposal needs building works. The use may be free to change while the shopfront, the extraction duct and the new entrance all need permission in their own right.

Where the position is unclear, a certificate of lawfulness under section 191 or 192 of the Town and Country Planning Act 1990 is the only way to get confirmation with legal effect. It carries a fee and takes eight weeks, and on a contested unit it is money better spent than on a planning application that answers the wrong question.

The application fee and what pushes it into a higher band

Planning fees are set by national regulations, were uplifted in December 2023 and are subject to annual indexation each April. Take the current figure from the gov.uk fees guidance or the Planning Portal fee calculator rather than from a note in your files, and allow for the service charge on the online submission.

A change of use application attracts a flat fee. Where the application also includes building works, such as an extension, a new mezzanine creating floorspace or external alterations, the fee is worked out under the category applying to those works, which is usually the higher figure. The way floorspace and site area drive the calculation is set out in full application fees by floorspace and site area, and the annual uplift is covered in how planning fees are indexed each April.

Three other published costs belong in the budget.

Where a prior approval route cuts the cost

Part 3 of Schedule 2 to the General Permitted Development Order contains several prior approval routes, and where one fits, the fee and the evidence are both lighter than a full application.

The most used is the change from Class E to residential use in Class C3 under Class MA, which carries conditions on floorspace, on the building having been in Class E use for a qualifying period and vacant for a period before the application, and which excludes listed buildings and certain designated areas. Prior approval is limited to defined matters, which include transport, contamination, flood risk, noise from commercial premises and the provision of natural light to habitable rooms.

The practical advantage is scope. On a full application the authority can consider anything material. On prior approval it can only consider the listed matters, which means the evidence is targeted and the acoustic or transport work can be scoped tightly rather than written to cover every eventuality.

Read the conditions attached to the class before relying on it, since Part 3 has been amended repeatedly and the qualifying periods and floorspace limits have changed more than once. Where the proposal fails one condition by a small margin, a full application is the route, and that is a planning judgement rather than a fee calculation.

Extraction, odour and noise evidence

For food and drink uses this is where the real money sits, and it is design work rather than report writing.

A Ventilation/Extraction Statement has to show the system, not describe an intention. Grease filtration, odour abatement appropriate to the cooking type, duct route, discharge point above roof level, fan specification with its sound power level, and attenuation. The published guidance on the control of odour and noise from commercial kitchen exhaust systems is the reference environmental health officers use, and a proposal that discharges at first floor level into a courtyard will be refused whatever the paperwork says.

Noise from the plant is assessed separately, as sound of an industrial and commercial nature, which means a background sound survey and a rating level calculation. A Noise Impact Assessment for a single unit is a modest piece of work provided the survey is done in a representative week, and an expensive one if it has to be repeated.

Three cost drivers to control. Whether the landlord will permit a duct to roof level, since a refusal forces a more complex abatement solution. Whether the building has residential above or adjoining, which raises the standard. And whether the premises sit in an area where the authority already receives complaints, which makes the officer harder to satisfy.

Highways and servicing evidence

For most small change of use proposals this is a short statement rather than a transport assessment. What the authority wants is the trip pattern, the parking position and the servicing arrangement.

Deliveries are the item that gets missed. State the vehicle size, where it will stand, how long for, and whether it will block the footway or the carriageway. A photograph of the frontage with the loading position marked does more than three paragraphs. Where the use will generate a concentrated arrival pattern, a short local parking survey is proportionate.

Waste storage comes in the same section. Bin numbers by stream, where they will be kept, where they will be presented for collection, and how far they have to be moved. Authorities refuse applications on waste storage more often than businesses expect.

Conditions that land on the fit-out budget

Expect the permission to arrive with conditions that cost money after the decision. Extraction to roof level with specified abatement. An acoustic enclosure or attenuator to plant with a post-installation verification measurement. A grease management arrangement. Restricted delivery and collection hours. A waste storage enclosure built to a detail. Restricted opening hours. And in some cases a requirement for the extraction system to be maintained to a schedule.

Price these before you commit to a fit-out programme, because a condition requiring details to be approved before use begins is a hard gate. Where the report and its determination together take three months, an opening date set for eight weeks after the permission is wrong.

Where a condition is unworkable, an application under section 73 to vary it is the mechanism, and it carries its own fee and determination period.

Sequencing spend against the lease timetable

Order the spend so each stage de-risks the next.

1. Planning history and use class check, plus any article 4 and condition search. Lowest cost, highest value.
2. Pre-application advice where the authority offers it, with a specific question list rather than a general enquiry.
3. Heads of terms on the lease made conditional on planning permission, with a long stop date that matches a realistic determination period plus any committee cycle.
4. Extraction and plant design, since it drives the acoustic and odour evidence as well as the fit-out cost.
5. The application, with the environmental health evidence complete at submission rather than following later.
6. Condition discharge, grouped into as few submissions as the authority will accept.

Illustrative example: a vacant unit lawfully in Class E(a) retail use being taken for a cafe with limited hot food. Within Class E, so no change of use application for the cafe element, but the extraction duct, the shopfront alterations and the plant enclosure all need permission, and the fee falls under the works category rather than the flat change of use figure. The budget is driven by the duct route and the acoustic enclosure, not by the application.

PlanScope's own pricing is published and fixed, with one free report, £50 per report, or £150 per month for the Professional tier, and the detail is on the pricing page. This is general guidance, not legal advice, so check the position with your local planning authority or a qualified professional before relying on it.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required.