Laundrettes and dry cleaners: solvents and extraction

Getting dry cleaner planning permission and getting launderette planning permission are different problems, and the first difference is the use class. A launderette is one of the uses listed in article 3(6) of the Town and Country Planning (Use Classes) Order 1987, as amended, which belong to no class at all, so any change to or from a launderette is development. A dry cleaning shop is generally treated as falling within Class E, most often the limb covering other services appropriate to provide in a commercial, business or service locality.

So a unit can often become a dry cleaner without an application, and cannot become a launderette without one. After that, the decisive issues are the same for both: what comes out of the flue, what the machines do to the building, and whether anyone lives above.

Which class each use occupies

Take the classification seriously before signing a lease, because it determines whether you are applying at all.

The launderette listing in article 3(6) has been there for many years and survived the 2020 rewrite. It reflects the pattern of use rather than the activity: long opening hours, continuous machine noise, moisture and heat discharge, and customers coming and going in the evening.

A dry cleaner is a shop receiving goods for cleaning, which sits inside Class E. That means a former bank, office or retail unit can be occupied as a dry cleaning reception without a change of use application, and the reasoning is the same as the boundary question set out in our note on opticians, pharmacies and the Class E health boundary.

The distinction gets harder where a business does both, or where a dry cleaning shop installs self-service machines. A reception-only shop with cleaning done off site is clearly Class E. A unit with a bank of coin-operated washers is a launderette in substance whatever the sign says. Where the mix is unclear, ask the authority in writing, or apply for a certificate of lawfulness of proposed use under section 192 of the Town and Country Planning Act 1990.

One further point. Even where no change of use application is needed, the physical works almost always need permission: a flue, an external condenser, a new shopfront or a rear extract duct are all development.

Solvent machines and the regulatory position

Dry cleaning using organic solvents is a regulated activity in its own right, separate from planning.

An installation using solvents needs an environmental permit from the local authority under the Environmental Permitting (England and Wales) Regulations 2016, and the regulator applies a published process guidance note setting standards for machine type, enclosure, ventilation, leak detection, maintenance and record keeping. The direction of travel has been away from open-circuit machines towards fully enclosed dry-to-dry plant with integral solvent recovery.

Perchloroethylene, the chlorinated solvent long used in the trade, is the reason that regime is as tight as it is. It is volatile, denser than air, and its health profile has driven both the permitting standards and a commercial shift towards hydrocarbon systems and wet cleaning. Exposure of employees is controlled separately under the health and safety legislation, with the Health and Safety Executive as the regulator.

For a planning application, the practical consequence is this. The planning authority will not duplicate the permit, and a condition requiring you to obtain one is generally inappropriate. But the environmental health team advising on the application is often the same team that issues the permit, and they will tell the case officer whether the proposal is deliverable at that address. Talk to them before you apply.

Extraction, ventilation and discharge

Both uses discharge air that neighbours notice, for different reasons.

A launderette's tumble dryers discharge warm, moist, lint-laden air in volume. The failure mode is a low-level grille on a rear elevation producing a plume across a neighbour's window and a damp patch on the wall opposite. A dry cleaner's plant discharges a lower volume with a solvent signature, and the failure mode is odour complaint.

The design principles are the same:

• Terminate the discharge above roof level, clear of openings, with the outlet positioned so the plume disperses away from windows and habitable areas.
• Size the duct and the fan together so that the system delivers the design flow rate at the installed resistance, rather than assuming a fan rating.
• Provide access for cleaning, because lint accumulation in a laundry duct is a fire risk as well as a performance problem.
• Detail the route through the building, including how it passes each compartment floor.
• Draw the duct on the elevations at the size it will actually be, in the colour and material proposed.

The Ventilation and Extraction Statement is the document that carries this, and on a unit in a mixed-use building it is usually the item that decides the application. A duct proposed as a dotted line on a plan, with no elevational treatment, is the most common reason these applications are refused on design grounds.

Residential accommodation above the unit

This is the hardest case, and it deserves a clear answer rather than optimism.

Where flats sit directly above, three separate problems arise at once. Solvent vapour, which is heavier than air but migrates through service voids, floor junctions and staircases, and which the permitting regime treats with particular care in premises with residential accommodation above or adjoining. Noise and vibration from spin cycles transmitted through the structure. And heat and moisture, which a shared building takes badly.

The regulator may refuse or heavily condition a solvent installation in that location, and the planning authority may take the same view on amenity grounds. Before committing, establish in writing whether the environmental health team would accept a solvent machine at that address at all. If the answer is no, the options are off-site cleaning with the shop as a reception, or wet cleaning and hydrocarbon systems, each of which changes the business model.

For a launderette above or below dwellings, the answer is usually achievable but detailed: machines on isolated plinths with anti-vibration mounting, a floating floor where the structure is timber, extract ducted to roof level rather than to the rear wall, and conditioned hours.

Noise from drums, dryers and plant

Assess it properly. A bank of washing machines reaching spin at the same time produces both airborne noise through the shopfront and structure borne vibration into the fabric.

The submission should include a baseline sound survey covering the proposed operating hours, predicted levels from the machines and any external plant, and an assessment of the rating level against the measured background sound level following the approach in BS 4142:2014+A1:2019. Where dwellings are in the same building, target internal levels should be referenced to the guidance values for internal ambient noise in dwellings. A Noise Impact Assessment is usually expected from a suitably qualified author, with professional review strongly advised.

Conditioned hours are normal and worth negotiating rather than accepting. Ask for separate hours for customer access and for machine operation if your model depends on a last wash before closing.

Trade effluent and drainage

Commercial laundry discharge is not domestic sewage. It carries detergent, lint, fibres and heat, and it may need a trade effluent consent from the sewerage undertaker under the Water Industry Act 1991. Lint separation before discharge is standard, and the undertaker may set temperature and quality limits.

Solvent residues and still bottoms from dry cleaning are hazardous waste and leave the site under consignment with a registered carrier. Neither the sewer nor the general waste stream is an option, and the storage location for waste drums has to appear on the plan.

The contaminated land legacy

One point for anyone buying or redeveloping a site where dry cleaning once happened. Chlorinated solvents released over decades are a well-recognised source of soil and groundwater contamination, they migrate, and they are expensive to deal with.

A desk study covering the historic use is the starting point, and where the history shows solvent use, intrusive investigation normally follows. A Land Contamination Assessment has to be prepared in accordance with the relevant British Standard by suitably qualified and experienced persons, which is a legal expectation rather than a preference, and an AI-drafted report is a starting point for that professional rather than a substitute.

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

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