A retail unit split into two, and the access problem

Splitting a retail unit planning application usually fails or succeeds on access and servicing rather than on use class. The two halves normally stay within Class E, so there is often no material change of use to apply for. What does need permission is the physical work: a second entrance, an altered shopfront, a new bin store, and whatever the highway authority thinks about two deliveries where there was one.

This walkthrough is illustrative. It is assembled from the way subdivisions of this kind are commonly assessed rather than from any named scheme, and the figures in it are examples.

The unit and the reason for splitting it

A double-fronted ground floor unit of roughly 320 m² on a suburban high street, trading as a single shop, with flats above in separate ownership. The landlord had been unable to relet the whole unit for eighteen months. Two smaller units of about 160 m² each had interest from a coffee operator and a household goods retailer.

The building sits inside a designated local centre in the adopted local plan, outside a conservation area, on a classified road with a loading bay in front and a narrow service yard reached from a rear lane shared with three other properties.

The commercial logic was straightforward. The planning question was not.

Whether subdivision needed permission at all

Two separate issues get muddled here, and separating them is the whole job.

The use. Both proposed occupiers fall within Class E of the Town and Country Planning (Use Classes) Order 1987 as amended: a shop under E(a) and a cafe under E(b). Movement within Class E does not involve development. There is also no provision for non-residential subdivision equivalent to section 55(3)(a) of the Town and Country Planning Act 1990, which treats the conversion of a single dwellinghouse into two or more dwellings as a material change of use. Whether subdividing a commercial unit is a material change of use therefore turns on the facts, and on an ordinary high street split into two Class E units it usually is not.

The works. A second entrance door, a new pilaster and mullion, an internal separating wall breaking through to the shopfront, a new fascia arrangement and a relocated bin store are all operational development. That needs permission, and once the council is determining an application for those works it will assess the consequences of two occupiers in the round.

The applicant took the sensible route: a single full application for external alterations, with a Planning Statement explaining that the use of both units remains within Class E and that no change of use was being applied for. The alternative, applying for a change of use that was not needed, invites conditions on a use the council had no business controlling.

Servicing and refuse for two occupiers

The officer's first substantive question was waste. One unit had one commercial waste contract and a single bin store in the service yard. Two units meant two contracts, more containers, and a cafe producing food waste on a different collection cycle.

What resolved it:

• A measured plan of the existing yard showing container positions, with dimensions and the pull distance to the collection point.
• A waste storage schedule for each unit stating container type, number, and collection frequency, checked against the council's own waste storage guidance for commercial premises.
• Confirmation that the shared rear lane could still be used by the other three properties with the new containers in place.
• A commitment to a single dedicated store rather than containers left in the lane, which is what the environmental protection officer was worried about.

Deliveries were the second question. The loading bay at the front takes one vehicle. The applicant's transport note showed cafe deliveries in small vans outside peak hours and retail deliveries weekly, then offered a delivery and servicing commitment restricting both units to specified hours. That was the point at which the highway authority withdrew its holding objection.

The access requirement that nearly stopped it

The existing entrance had a single 150 mm step from the footway, grandfathered in an old building. Subdividing meant forming a new entrance, and a new entrance to a building other than a dwelling engages Part M of the Building Regulations through the material alteration provisions. A new step-free entrance is the expectation.

The footway level gave about 150 mm to lose across a 1.2 m depth of recessed entrance, which is achievable with a shallow internal ramp and a level landing inside the door. Two things made it work:

1. Moving the separating wall 400 mm off centre so the cafe unit took the recessed doorway with room for the ramp, while the retail unit's new door sat flush with a level threshold formed in the shopfront rebuild.
2. Rebuilding the internal floor level at the entrance zone rather than ramping the footway, which the highway authority would not have adopted.

Both units ended up step-free. The Equality Act 2010 duty to make reasonable adjustments sits alongside the Building Regulations and applies to the occupiers as service providers, so the landlord's interest and the tenants' interest pointed the same way. A Design and Access Statement set out the approach, and the access section is the part the case officer quoted in the delegated report.

The lesson generalises. On most subdivisions the accessible entrance is the constraint that decides where the dividing wall goes, so test it before the letting plan is fixed.

Shopfront alterations and the design response

Councils object to subdivided shopfronts when the result reads as two mismatched frontages stapled together. The design response here kept the original framework and changed what sat inside it.

But the extract route mattered more than it looks. A cafe serving hot food on a frontage with flats above will attract objections on odour and noise from plant, and the cleanest answer is always an internal riser to a terminal above roof level. Where that is not possible, expect to be asked for an assessment of the proposed system before permission is granted, and see our walkthrough of retail below flats in mixed use buildings for how that interaction usually plays out.

The conditions that came with permission

Permission was granted at delegated level. The conditions worth noting:

1. Materials and finishes to the shopfront to be approved before the work starts, with samples of the pilaster profile and stallriser.
2. The waste storage arrangement to be provided before either unit is first occupied and retained thereafter.
3. Deliveries and servicing restricted to specified hours, matching the commitment in the transport note.
4. Extract ventilation to be installed in accordance with the approved drawings before the cafe unit opens.
5. Details of any external plant to be submitted for approval, with nothing permitted on the front elevation.

No condition restricted the use of either unit within Class E, which was correct. The council had no application for a change of use before it, and a condition removing Class E flexibility would have needed clear justification.

Hours of opening were not conditioned either, and the applicant did not volunteer them. On a unit in a local centre with residential above, that is the condition most likely to appear, so being ready with evidence about the existing trading pattern is sensible.

What the split produced, and what it cost in time

Both units let within four months of practical completion, at a combined rent above the single-unit quoting rent, which is the usual reason landlords do this. The planning process took about five months from first pre-application contact to decision, with most of that spent resolving the waste and delivery points rather than the design.

If you are scoping a similar split, the documents that carry the weight are the planning statement, the design and access statement, a waste storage schedule and a short delivery and servicing note. Browse the full set of planning report types to see what a specific site is likely to need. PlanScope can draft those documents in minutes, structured to UK planning policy, with site-specific facts flagged where they are missing. Reports should be reviewed before submission, and we do not guarantee planning approval.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.