Drive-through units: classification and highway evidence
The drive-through lane is what makes these applications difficult. Classification, queue capacity and the right turn into the site decide most of them.
A drive-through unit is usually applied for as a sui generis or mixed use rather than as Class E, because the sale of hot food for consumption off the premises was taken out of the use classes in the 2020 amendments and left as a use of its own. The sit-in element is Class E(b). The window is not. Most operators want both, so the description of development has to describe both.
Get that right and the application still turns on three pieces of evidence: how long the queue gets, how vehicles turn into and out of the site, and what the kitchen does with its extract air.
Whether the drive-through element changes the use
The Use Classes Order puts sale of food and drink for consumption on the premises into Class E(b). Sale of hot food for consumption off the premises sits outside the classes altogether, as a sui generis use, which means any change to it or from it needs planning permission and no permitted change applies.
A conventional drive-through restaurant does both things in the same building. In practice, applications are made in one of three ways: for a sui generis use described as a restaurant with a drive-through facility, for a mixed use combining Class E(b) with hot food takeaway, or occasionally for a restaurant use with the drive-through lane described as an operational feature. The first two are safer, because a permission that fails to authorise the takeaway element leaves the operator exposed to an enforcement complaint at the busiest hour of the day.
Hot drinks are the part that remains unsettled. A coffee unit selling hot beverages through a window may or may not fall within the hot food category, and councils differ. Agree the wording with the case officer and record the agreement in writing, because the same question will be asked again when the unit is sold. The same classification thinking applies to delivery only food operations, which sit in a different place again.
Queue length and internal circulation
The highway authority's first question is what happens when 14 cars arrive in 10 minutes.
Answer it with evidence rather than assertion. Survey queue lengths at comparable units operated by the same brand at similar times, present the arrival profile across the peak period, and model the queue that results. Report a modelled maximum queue rather than an average, because the average never causes a problem.
Then show it on a drawing. The queue has to sit between the order point and the collection window without blocking the internal circulation route, the car park aisles or the access. Three design features do most of the work:
- An escape lane that lets a driver leave the queue without reversing
- Separation between the drive-through lane and the car parking aisles so that queuing does not block parked cars
- A bypass lane at the collection window for orders that take longer than expected
Where the site shares an access with a retail park or a petrol station, model the interaction rather than treating the unit in isolation. That is usually where a Transport Statement has to go beyond the standard content.
Access, right turns and highway safety
The right turn in is the movement that attracts objections, and on a busy distributor road it is the movement most often designed out.
Options in rough order of acceptability run like this. A left in, left out arrangement with a physical island. A ghost island right turn lane with adequate storage. A signalised access, or an existing junction improved under a highway agreement. Visibility splays have to be measured against recorded speeds rather than the posted limit, because the design speed is what matters and the two often differ.
Pedestrian and cycle access is the part applicants forget. A unit that can only be reached by car sits badly against national policy on sustainable transport, and a safe crossing point, a footway link and cycle parking near the entrance cost little at design stage and are awkward retrofits later.
Odour, noise and the late evening
Extraction is the environmental health officer's territory, and a flue drawn on an elevation is not a scheme.
Provide a designed system: the cooking processes and their odour potential, the extract rate, the filtration and odour control selected, the duct route, the discharge height and velocity, and the distance and orientation to the nearest sensitive receptors. Recognised guidance on control of odour from commercial kitchen exhaust systems sets out the method, and a Ventilation and Extraction Statement that follows it will be assessed on its terms. Discharging at high level above the roof ridge is the usual answer and it is not always possible on a single storey unit next to housing, which is precisely when the odour control specification has to do more work.
Noise comes from four places: the extract fan and refrigeration plant, the order point speaker, car doors and engines in the queue, and staff and customers at closing time. A Noise Impact Assessment should deal with plant noise against the relevant standard and address the customer noise separately, because plant assessment methods do not capture people.
Late night hours are where these applications are won or lost next to residential areas. Offering a closing time rather than defending unrestricted hours often secures the permission, and the operator can apply to vary the condition later with a year of trading evidence.
Lighting and signage
Canopy lighting at a drive-through is bright by design and spills readily. Provide a lighting layout with illuminance contours, keep light off residential windows and habitable room facades, and specify the control regime for the hours after closing.
Illuminated signs, totems and menu boards generally need advertisement consent, assessed only on amenity and public safety. Menu board illumination facing a dwelling is an amenity issue, and a totem that distracts drivers at a junction is a safety issue. Submit the advertisement application at the same time as the planning application.
Conditions to expect, and to offer
Offering sensible conditions in the covering submission is a practical way of narrowing what a case officer has to negotiate.
- Hours of opening for the restaurant and for the drive-through lane, which can differ.
- Delivery hours, usually excluding the early morning and late evening.
- A litter management scheme with patrol radius, frequency and a named contact.
- Details of the extraction system to be approved and installed before opening, and maintained thereafter.
- Plant noise limits expressed against background levels at the nearest receptor.
- Lighting to be installed in accordance with the approved layout and not altered.
Conditions have to meet the six tests in national guidance, so resist those that are unenforceable, such as a requirement that customers do not play music in the queue.
Assembling the application
Put the classification argument at the front of the planning statement, then the transport evidence, then environmental health, then design. That is the order in which the consultees will read it.
An illustrative example. A unit on the edge of a retail park was refused at first attempt because queue modelling showed the tail reaching the shared access at Saturday lunchtime. The resubmission moved the order point 12 metres further into the site, added a bypass lane and accepted a delivery hours condition. The highway objection was withdrawn.
This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it.
To see which reports a drive-through proposal is likely to need, check the site on PlanScope with its postcode.
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Frequently asked questions
Is a drive-through restaurant Class E?
Rarely on its own. Sale of food and drink for consumption on the premises falls within Class E(b), while sale of hot food for consumption off the premises has been sui generis since the 2020 amendments. A drive-through normally involves both, so permission is usually sought for a mixed or sui generis use and the description of development has to say so.
Does a coffee drive-through need the same approach?
The classification is less settled for hot drinks than for hot food, and councils take different views on whether a hot beverage sold through a window falls within the sui generis takeaway category. Agree the description with the case officer before submission, because a permission granted for the wrong class creates problems when the unit is later sold or re-let.
How much queuing space does a drive-through need?
Enough that the longest reasonably expected queue stays inside the site with the lane still passable. The figure comes from survey evidence at comparable units and from the peak arrival profile, expressed as a modelled queue rather than as a rule of thumb. The highway authority will focus on whether queues can reach the access or the public highway.
Can a council refuse on litter grounds?
Litter is a material consideration where the evidence supports it, though it is more often controlled by condition than used as a reason for refusal. Typical conditions require litter patrols within an agreed radius at a stated frequency, bins at the exit and on the frontage, and a named contact for complaints. Offer the regime rather than waiting to be asked.
Do the signs need a separate consent?
Usually yes. Most illuminated signage, totem poles and menu boards need advertisement consent, which is a separate application from planning permission and is assessed on amenity and public safety grounds only. Submit both together where possible, because a scheme approved without its signage rarely opens on programme.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.