Planning permission affects homeowners, developers, and neighbours alike. Whether you want to build an extension, object to a neighbour's development, or challenge a council's planning decision, understanding how the system works is essential. This guide covers permitted development, how to comment on applications, appealing decisions, and enforcement.
Key points
✓A great deal of work needs no permission at all under permitted development: many single-storey rear extensions, loft conversions within volume limits, outbuildings within size limits, and most internal alterations.
✓An objection has to rest on planning grounds. Overlooking and loss of privacy count; disliking the applicant does not.
✓Appeal deadlines are short and strictly applied, so act as soon as a refusal arrives rather than waiting to see if anything changes.
✓There are three appeal procedures, and which one your case takes affects how it is decided and how long it takes.
✓A Lawful Development Certificate is how you prove work really was permitted development. It matters most years later, when you come to sell.
When do you need planning permission?
Not all building works require planning permission. Permitted Development Rights (PDR) allow certain works without a formal application:
✓Yes: Single-storey rear extensions up to certain depths (3m for terraced/semi, 4m for detached, extendable under the Prior Approval route)
✓Yes: Loft conversions within volume limits that don't extend beyond the roof plane
✓Yes: Outbuildings (sheds, garages, home offices) within size limits
✓Yes: Internal alterations (no planning permission needed for most internal work)
Permitted Development Rights can be removed or restricted by an Article 4 Direction (common in conservation areas or listed buildings) or conditions attached to a previous planning permission. Always check before starting work.
Scotland: Scotland has its own Permitted Development rules which differ from England and Wales. Check the Scottish Government's planning guidance or consult your local planning authority.
Objecting to a planning application
Anyone can comment on a planning application, you don't need to be a neighbour. Comments must be based on material planning considerations, personal objections and loss of view are not usually valid grounds.
Valid material planning considerations include:
✓Yes: Overlooking and loss of privacy
✓Yes: Overshadowing and loss of sunlight
✓Yes: Visual impact on the streetscape or character of the area
✓Yes: Traffic and highway safety
✓Yes: Noise and disturbance during construction or after completion
✓Yes: Impact on protected trees or listed buildings
✓Yes: Drainage and flood risk
✓Yes: Design incompatibility with the area
How to submit a comment: applications are listed on your council's planning portal. Search by address or application number. Submit your comments in writing within the consultation period (usually 21 days). Late comments may not be considered.
Appealing a planning refusal
If your planning application is refused, you have the right to appeal. Only the applicant (not objectors) can appeal a refusal.
1
Check the grounds for refusal
The council must give reasons for refusal. Consider whether the reasons are valid and whether you can address them (by amending the application and resubmitting, or by appealing).
2
Consider resubmission
In some cases, resubmitting an amended application is quicker than an appeal. The free 'resubmission' exemption from the application fee was abolished in England from 6 December 2023, so a new application now needs a new fee; check with your council whether any local discount applies.
3
Submit your appeal
In England and Wales, appeal to the Planning Inspectorate (gov.uk/appeal-planning-inspectorate) within 6 months of refusal (or 12 weeks for householder applications). There is no fee for appeals. In Scotland, appeal to the Scottish Government's Directorate for Planning and Environmental Appeals (DPEA).
Most householder appeals are decided by written representations, you submit your case in writing and an inspector reviews it without a hearing. More complex cases may have a local inquiry.
Appeal time limits, act quickly
Time limits for planning appeals are strict, missing them means losing your right to appeal:
The appeal clock starts from the date of the refusal notice. If the council fails to decide within the statutory period (8 or 13 weeks), you can appeal for non-determination, this treats the application as if it were refused.
The three appeal procedures
The Planning Inspectorate handles appeals in England via three procedures:
Written representations
The most common route for householder appeals. You and the council submit written statements; the Inspector visits the site and decides on the papers. No hearing. The median decision time for written representations over the 12 months to June 2026 was 18 weeks. National success rate: written representations were allowed at 29% to 30% in each of the last four quarters to June 2026, and the overall Section 78 rate across all procedures was 31% for April to June 2026.
Hearing
An informal discussion led by the Inspector, both sides present their case verbally and answer the Inspector's questions. Used for moderately complex cases. The median decision time over the 12 months to June 2026 was 23 weeks. More effective than written representations where facts are disputed.
Public inquiry
Formal process with legal representation, expert witnesses, and cross-examination. Used only for major or highly controversial schemes. The median decision time over the 12 months to June 2026 was 26 weeks for a planning inquiry. Rarely used for householder applications.
Lawful Development Certificates
If you believe your proposed works are permitted development, you can apply for a Lawful Development Certificate (LDC) from your council:
✓Yes: An LDC is a formal certificate confirming that your works do not require planning permission
✓Yes: It provides legal certainty, particularly useful when selling the property or remortgaging
✓Yes: Prospective LDC: before works begin, confirms planned works are lawful
✓Yes: Existing LDC: after works are complete, confirms existing development is lawful (e.g. where enforcement immunity has been reached)
✓Yes: Fee: an existing-use certificate (works already done) costs the same as a full householder planning application, £548 in England from 1 April 2026; a proposed-use certificate (before you start) costs half that. Planning fees in England are increased every April in line with the previous September CPI, so check the current figure before you pay. Scotland, Wales and Northern Ireland set their own fees
✓Yes: If the council refuses an LDC, you can appeal to the Planning Inspectorate
✓Yes: An LDC is not the same as planning permission, it simply confirms no permission is needed
Costs, can you recover appeal costs?
Planning appeals are free to submit, but costs can be awarded against a party that behaves unreasonably:
✓Yes: You can apply for costs against the council if they refuse without proper evidence, give vague or unsupported reasons, or behave unreasonably during the appeal
✓Yes: The council can apply for costs against you if your appeal has no reasonable prospect of success
✓Yes: Make a costs application at the same time as your appeal, it is a separate document
✓Yes: Costs are awarded in a minority of cases, and only where unreasonable behaviour is shown
✓Yes: Wasted costs orders: if a party introduces evidence very late or causes unnecessary delays, costs may be awarded
Planning enforcement, if work is done without permission
If a neighbour has carried out development without planning permission (or in breach of conditions), you can report it to the council's planning enforcement team.
✓Yes: Report to your council's planning enforcement team in writing
✓Yes: Enforcement is generally discretionary, the council decides whether to act
✓Yes: Common remedies: enforcement notice (requiring work to be undone), stop notice, breach of condition notice
✓Yes: In England, since 25 April 2024 the time limit is a flat 10 years for every kind of breach. In Wales, the old split still applies: 4 years for building work or a change of use to a single dwelling, 10 years for any other breach.
✓Yes: You have limited rights as a third party in enforcement proceedings, the council is the decision-maker
Councils are not required to take enforcement action. If the council refuses to act, you can complain to the Local Government Ombudsman if you believe there has been maladministration, but the council retains wide discretion on enforcement.
Do I need planning permission for a home extension?
Many extensions can be built under Permitted Development (PD) rights without needing planning permission. Single-storey rear extensions of up to 4 metres (detached) or 3 metres (semi-detached or terraced) often qualify. However, PD rights can be removed by Article 4 directions in certain areas, and they do not apply to flats or listed buildings. Always check with your council before starting work.
How do I object to a neighbour's planning application?
When a planning application is submitted, neighbours are notified and given the opportunity to comment. You can submit objections through your council's planning portal during the consultation period (usually 21 days). Valid grounds include: impact on privacy, loss of light, noise, traffic, flood risk, and design out of keeping with the area. Personal objections (e.g. blocking a view) carry less weight than planning policy grounds.
Can I appeal a planning refusal?
If your planning application is refused, you can appeal to the Planning Inspectorate (England) or equivalent body in Scotland, Wales and Northern Ireland. Appeals must be submitted within 6 months of the refusal (or 12 weeks for householder applications). The Planning Inspectorate is independent of the local council, and 31% of Section 78 planning appeals were allowed in April to June 2026 (Planning Inspectorate).
What can I do if my neighbour builds without planning permission?
You can report unauthorised development to your local council's planning enforcement team. Councils have the power to issue an enforcement notice requiring the work to be demolished or altered. However, councils have discretion over whether to enforce, and there is a time limit: in England it is a flat 10 years for any breach since 25 April 2024; in Wales it is 4 years for building work or a change of use to a single dwelling, 10 years for any other breach.
What is permitted development?
Permitted Development (PD) rights allow certain types of building work and changes of use without requiring a planning application. Common PD rights include: loft conversions, outbuildings, solar panels, and some extensions. You can apply to your council for a Lawful Development Certificate to confirm your project falls within PD rights, this provides legal certainty if you sell the property.
If you run a site, write an article, or help others with their rights, please link to this guide, it helps more people find free, reliable guidance.
https://www.knowyourrightsuk.com/council/planning
Know Your Rights UK. "Planning Permission: Rights for Applicants and Neighbours." Know Your Rights UK, https://www.knowyourrightsuk.com/council/planning