Building work can attract council attention for more than one reason. An extension may have been built without the required planning permission, approved drawings may not have been followed, or construction may raise separate concerns about structural or fire safety. In London, these issues can overlap, but they do not all belong to the same legal regime.
Planning enforcement deals with breaches of planning control. Building Regulations and building-safety rules address different questions about how work is constructed and whether technical requirements have been met. Where unauthorised development is alleged, planning enforcement solicitors London or another planning-law professional may help clarify the planning position. Aldwych Legal supports clients across England with planning permission disputes, construction disputes, enforcement responses and strategic case preparation.
When Building Work Becomes a Planning Enforcement Issue
Under section 171A of the Town and Country Planning Act 1990, a breach of planning control includes carrying out development without the required planning permission or failing to comply with a condition or limitation attached to a permission.
For building works, that may include an extension built without permission, development that materially departs from approved plans, or work carried out contrary to a planning condition. It may also involve development that was assumed to be permitted development but falls outside the relevant limitations or conditions.
Not every alteration needs express planning permission. The first task is therefore to establish what was authorised, what has actually been built and whether any permitted development right applies.
Unsafe Work and Unauthorised Work Are Different Questions
A structure can be unauthorised in planning terms without necessarily being unsafe. Equally, work can have planning permission but still fail to comply with Building Regulations.
GOV.UK makes clear that Building Regulations approval is different from planning permission and that a project may require both. Building Regulations deal with technical construction standards the core concern of Health & Safety Law including matters such as structural stability, fire safety, ventilation and accessibility.
That distinction matters where a council raises several concerns at once. Each issue should be dealt with through the correct process.
Start With the Council Correspondence
The first council contact may be an informal email, investigation letter or request for a site visit. That is different from receiving a statutory enforcement notice.
The owner should identify:
- what works the council says are unauthorised;
- when those works were carried out;
- whether planning permission exists;
- whether the works match approved drawings;
- whether permitted development rights may be relevant; and
- whether separate Building Regulations or safety concerns have also been raised.
Planning permissions, decision notices, approved plans, photographs and construction records should be preserved. Aldwych Legal can support evidence-led planning-dispute preparation where the planning history is complicated or the council’s allegation does not match the documents.
The Council Has Discretion Over Planning Enforcement
A local planning authority does not have to issue an enforcement notice every time it identifies a breach. Government guidance states that enforcement is discretionary a power exercised by every Local Government Law authority and that authorities should act proportionately, considering whether formal action is expedient.
That can create room for early resolution through explanation, remedial work, negotiation or another planning route. Informal discussion does not prevent formal action if the council considers enforcement expedient.
When Urgent Planning Powers May Be Used
An ordinary stop notice is linked to an enforcement notice and can prohibit activities forming part of the alleged breach before the enforcement notice’s compliance period expires. It cannot be served independently.
A temporary stop notice is different. It can take effect immediately without an enforcement notice first being issued where the authority is satisfied that there has been a breach and that it is expedient for the activity to stop immediately.
Current government guidance says these powers should prohibit only what is essential to safeguard amenity or public safety in the neighbourhood, or to prevent serious or irreversible environmental harm.
Where active building work is affected, planning permission dispute support in London can help owners understand how the planning history, urgent enforcement and evidence fit together.
Retrospective Permission May Be One Option
Where building work required planning permission but was carried out without it, a retrospective application under section 73A may sometimes be appropriate.
The council still assesses the proposal on its planning merits. Permission is not guaranteed, and submitting a retrospective application does not automatically stop enforcement action.
Before applying, the owner should consider the council’s objections, the prospects of approval and whether another route fits the facts. A Lawful Development Certificate may instead be relevant where the development is said to be already lawful.
Aldwych Legal can support case preparation where the owner needs to compare retrospective permission, lawfulness and enforcement options before choosing a route.
What if an Enforcement Notice Is Served?
An enforcement notice should identify the alleged breach, state what steps must be taken and specify both its effective date and the compliance period.
If the recipient wants to appeal, the Planning Inspectorate must receive the appeal before the effective date stated on the notice. Negotiations with the council do not suspend that deadline.
Depending on the facts, an appeal may concern what occurred, whether it was a breach, enforcement time limits or whether permission should be granted.
This is where planning permission solicitors London or other planning professionals may help organise drawings, planning records and technical material around the actual appeal ground.
Evidence Can Decide the Dispute
Building-work cases often depend on chronology. Useful evidence may include:
- dated photographs and aerial imagery;
- architect or surveyor drawings;
- building contracts and invoices;
- planning permissions and approved plans;
- contractor or completion records; and
- correspondence with the council.
Where enforcement time limits are raised, the relevant date can be legally important. England’s enforcement rules changed on 25 April 2024, so the correct period should be checked against the type and date of the alleged breach rather than applying a generic rule.
Keep Building Control and Planning Separate
If Building Regulations concerns arise alongside planning enforcement, each issue needs its own response. Higher-risk building work may require approval from the Building Safety Regulator, while other work may use a local authority or registered building control approver.
Obtaining retrospective planning permission does not itself regularise a Building Regulations breach. Conversely, Building Regulations approval does not prove that planning permission was obtained.
The same separation applies to licensing, restrictive covenants and title issues. Unauthorised development legal advice should therefore focus on the specific regime that is creating the problem.
Conclusion
Unauthorised building work in London can lead to planning enforcement where development was carried out without required permission or contrary to a planning condition or limitation. Safety concerns can make a situation more urgent, but planning enforcement and building-control enforcement remain separate legal processes.
Owners should identify what the council is alleging, review the planning history, preserve evidence and check whether a formal notice or appeal deadline has arisen. Retrospective permission, remedial work, a Lawful Development Certificate or an enforcement appeal may each be relevant in different circumstances.
Aldwych Legal supports clients across England with planning-dispute preparation and enforcement responses. Early, organised action can help separate the planning issue from any building-control concerns and reduce the risk of missing a statutory deadline while the council’s investigation develops.
Frequently Asked Questions (FAQs)
Are unauthorised and unsafe building work the same issue?
No. A structure can be unauthorised in planning terms without being unsafe, and vice versa.
Does the council have to issue enforcement for every breach?
No. Enforcement is discretionary; authorities should act proportionately and consider whether it’s expedient.
Can urgent powers stop building work immediately?
Yes. A temporary stop notice can take effect right away without an existing enforcement notice.
Does retrospective permission automatically halt enforcement?
No. It’s not guaranteed, and applying doesn’t automatically pause any enforcement action underway.
Does planning permission also cover Building Regulations compliance?
No. They’re separate regimes; one doesn’t establish or prove compliance with the other.
