Statutory nuisance after planning permission is granted

Planning permission does not license a nuisance. A restaurant can open with a permission that approved its extract system, comply with every condition on the decision notice, and still receive an abatement notice from the same council's environmental health team six months later. The two regimes ask different questions, and the answer to one does not settle the other.

For anyone running a business in premises near homes, that is the single most useful thing to understand before signing a lease.

Two regimes, two tests

Planning asks whether development is acceptable in land use terms, judged against the development plan and material considerations, and it looks forward to a predicted effect. Statutory nuisance under Part III of the Environmental Protection Act 1990 asks whether an actual state of affairs is prejudicial to health or a nuisance, judged on what is happening now.

The categories that catch trade premises are noise emitted from premises, dust, steam, smell or other effluvia arising on industrial, trade or business premises, smoke, and artificial light. Note the wording on odour: the effluvia category applies specifically to industrial, trade and business premises, which is why a commercial kitchen is treated differently from a domestic one.

A council has a duty to inspect its area for statutory nuisances and to take reasonably practicable steps to investigate complaints. That duty is not discretionary, and it does not pause because the premises hold a planning permission.

What makes noise a nuisance

Nuisance is judged by its effect on the reasonable occupier of the affected premises, taking account of the character of the locality, the duration and timing of the noise, its frequency, and whether it has a character that makes it intrusive such as tonality or thumping bass.

There is no decibel threshold in the Act. An officer forms a judgement, usually after witnessing the noise personally or from monitoring equipment installed at the complainant's property, and that judgement is what is tested on appeal.

Practical consequences for an operator:

• A level that passed an assessment at planning stage can still be a nuisance if the character of the sound was not captured by the assessment method.
• Intermittent noise late at night carries far more weight than a higher level during the day.
• Complaint diaries kept by neighbours are evidence, and they accumulate whether or not you know about them.
• Your own records of when plant runs, and at what settings, are the best answer to a diary.

Is permission a defence

Not in itself. The courts have held that a planning permission is not equivalent to statutory authority and does not authorise what would otherwise be a nuisance. What a permission can do, where it is strategic in scale, is change the character of the locality against which nuisance is judged, and the Supreme Court has treated the terms of a permission as capable of being relevant to that question while giving it little weight as a defence.

Compliance with a planning condition helps in a narrower way. If a condition sets a noise limit and you are within it, that is evidence about the level, and it shows an intention to control. It is not a conclusive answer, because the condition tested a predicted effect and the notice concerns an actual one.

The practical reading: treat conditions as a floor, not a ceiling.

Abatement notices and appeals

If satisfied that a statutory nuisance exists, or is likely to occur or recur, the local authority must serve an abatement notice. The notice can require the nuisance to be abated, prohibit or restrict its occurrence, and require works, and it specifies a time for compliance.

An appeal goes to the magistrates' court within 21 days of service. The grounds are set out in the Statutory Nuisance (Appeals) Regulations 1995, and they include that the notice is not justified, that there is an informality or defect in it, that the requirements are unreasonable, and, for trade or business premises, that the best practicable means were used to prevent or counteract the nuisance.

Three things to do in the first week:

1. Diarise the 21 day deadline. It runs from service, not from when you read it.
2. Instruct an acoustician or air quality consultant to measure what is actually happening, before you change anything.
3. Open a line with the environmental health officer. Most notices are resolved by works rather than by hearings, and an operator who engages gets more time.

Best practicable means for trade premises

The best practicable means defence is the one that matters commercially. Practicable in this context means reasonably practicable having regard to local conditions and circumstances, the current state of technical knowledge and the financial implications, and the means include the design, installation, maintenance and manner of operation of plant.

What supports the defence, in the order officers and courts find persuasive:

• A maintenance regime with records, including filter changes, belt tension and bearing condition.
• Commissioning measurements taken when the plant was installed, so drift can be demonstrated.
• Evidence that quieter or better equipment was considered, with quotations and reasons.
• Operational controls actually enforced, such as closing windows after a set hour and restricting deliveries.
• A written complaints procedure with a named responsible person.

What does not support it: a statement that the equipment was compliant when installed, with no records since.

Designing the problem out

Most of this is avoidable at fit-out. Select plant on sound power rather than on a headline figure from a brochure, allow space for attenuators that are sized rather than nominal, and mount everything on proper anti-vibration mounts with flexible connections. Structure-borne transmission through a shared party wall or floor defeats screening entirely, and it is the hardest failure to fix retrospectively.

For rooftop equipment the options and their trade-offs are set out in rooftop plant noise: screens, louvres and enclosures. For kitchen extract, odour control and discharge height are usually the deciding factors, covered in odour control for a hot food takeaway extraction system.

An illustrative example

Illustrative only: a cafe converted to an evening restaurant, with a permission granted on the basis of an assessment showing the extract fan at a rating level below background. After opening, complaints arrive about a low frequency hum in the flat above.

Measurement finds the fan compliant on the assessed metric but transmitting structure-borne vibration through a rigid duct bracket fixed to a party wall. The fix is a set of resilient mounts and a flexible connection, costing a fraction of a day's turnover. Had the operator contested the notice instead, the hearing would have cost more than the mounts.

Where the two regimes meet in your documents

Deal with both at application stage. A Noise Impact Assessment that addresses character as well as level, and a Ventilation and Extraction Statement that sets out discharge height, filtration and maintenance, give the environmental health officer what they need at the point they are most willing to agree conditions.

Then keep the records. The gap between a manageable complaint and an abatement notice is almost always documentation.

Enter your postcode on PlanScope to see which supporting documents a change of use or fit-out at your premises is likely to need.

This is general guidance, not legal advice; 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.