How Long Does Planning Permission Last in England?
A planning approval can feel like the biggest hurdle has been cleared. But how long does planning permission last before it can no longer be relied upon? The answer is usually three years in England, but that headline rule needs careful handling. The wording of the decision notice, the type of application, the site location and the work undertaken before the deadline can all affect whether a permission remains valid.
For a home extension, replacement dwelling or commercial scheme, leaving this question until builders are due on site can create avoidable cost and delay. A permission does not generally give an unlimited right to build whenever circumstances suit.
How long does planning permission last in England?
For a full planning permission in England, development must normally begin within three years of the date the permission was granted. This applies to many common proposals, including extensions, new homes, alterations and commercial development.
The local planning authority can set a different period through a condition. A larger or more complex project may have a shorter or longer implementation period where there is a clear planning reason for it. The decision notice is therefore the document that matters, not an assumption based on the standard rule.
A key distinction is that planning permission usually needs to be started, rather than completed, within the relevant period. A substantial new house does not have to be finished within three years. However, the start must be genuine, lawful and capable of demonstrating that the permission has been implemented.
This is one reason why a carefully planned pre-construction stage is valuable. It gives time to resolve technical design, tendering, building regulations, party wall matters and contractor appointments without accidentally allowing the planning consent to expire.
The position in Wales and other parts of the UK
The standard position differs across the UK. In Wales, full planning permissions are generally granted with a five-year period for commencement, unless the permission states otherwise. This is particularly relevant for clients with projects in North Wales.
Outline planning permissions follow a different route. In both England and Wales, the decision notice will normally require reserved matters applications – such as access, appearance, landscaping, layout or scale – to be submitted within a specified period, commonly three years. Development must then begin within the further period set after final approval of the last reserved matter, commonly two years.
Planning law and local procedures are not identical in Scotland or Northern Ireland, so advice based on an English approval should not be applied elsewhere without checking the relevant consent.
What counts as starting development?
This is where many projects become more complicated than expected. A token gesture on site is not always enough. The work must normally amount to a material operation under planning legislation, such as digging foundations, constructing a road, laying underground pipes or drains, or carrying out another meaningful operation authorised by the permission.
For example, excavation for approved foundations may be sufficient in principle. Clearing vegetation, putting up a site fence, delivering materials or demolishing a structure may not be, depending on the circumstances and the permission. Demolition can be especially sensitive where it is separately controlled or conditioned.
Even apparently qualifying work can be challenged if it has been carried out only to preserve a permission, is unrelated to the approved scheme, or has not complied with pre-commencement conditions. The safest approach is to ensure that the initial works are properly designed, documented and genuinely form part of the approved development.
Useful records include dated site photographs, invoices, contractor records, site diaries and inspection information. For more valuable sites or schemes where the timing is close, specialist legal advice may be appropriate. The evidence needed to establish lawful commencement can become very important if the site is sold, funding is sought or planning policy changes later.
Pre-commencement conditions can affect the deadline
A permission may be issued subject to conditions that must be discharged before any work starts. These often cover materials, drainage, ecology, landscaping, tree protection, construction management, contamination or archaeological investigation.
If a condition says that no development shall commence until details have been approved, starting foundation work before that approval may breach the permission. It can put the project in a difficult position even where the three-year period has not yet passed.
Conditions need to be reviewed at the outset, not when a contractor is ready to mobilise. Some require information that takes time to prepare, such as a drainage strategy, detailed external materials schedule or ecological survey at a particular time of year. A discharge of conditions application also needs to be determined by the local authority, which should be built into the programme.
There is a practical balance to strike. Discharging every condition immediately may be unnecessary, particularly where some relate to later stages of construction. But every pre-commencement condition must be identified early, alongside the steps needed to implement the permission lawfully.
Can planning permission be extended?
The former process for extending the life of a planning permission is no longer generally available. If an unimplemented permission is approaching expiry, the usual solution is to submit a new planning application.
A fresh application is not automatically a repeat of the original process. The local authority will assess it against current national and local planning policies, current site circumstances and any relevant changes nearby. This can be straightforward where the proposal remains acceptable and policy has not moved significantly, but it can become more involved where design standards, flood risk, heritage considerations, biodiversity requirements or neighbourhood planning policies have changed.
A revised proposal may be preferable to simply resubmitting the old one. For instance, a homeowner may decide to improve the layout, reduce construction cost or respond to new family needs. For developers, a refreshed design can address updated market expectations and technical standards. The risk is that substantial changes could require a different application strategy and a new planning assessment.
Changes after permission has been granted
Not every change requires a new full application. Small adjustments may be dealt with through a non-material amendment, while some changes to conditions can be considered under Section 73 of the Town and Country Planning Act 1990 in England. However, neither route should be treated as an automatic way to extend an expiring approval.
A Section 73 permission creates a new planning permission, but its scope and implementation period depend on the proposal, the conditions being varied and the authority’s decision. It cannot be used to vary the description of development itself. Where a change alters the scale, design, use or impacts of a scheme, a fresh application may be required.
This is an area where early professional review can prevent a seemingly modest design alteration from disrupting the construction programme or undermining an existing consent.
A sensible timetable before your consent expires
Once permission is granted, record the commencement date immediately and work backwards. Allow time for condition discharge, detailed technical design, building regulations approval, pricing, contractor selection and any site-specific consents. For listed buildings, separate listed building consent may also have its own implementation requirement, often three years.
Do not confuse planning permission with building regulations approval. They are separate statutory processes. Having one does not remove the need for the other, and neither guarantees that restrictive covenants, party wall obligations, easements or utility requirements have been resolved.
For projects in Cheshire and the wider North West, local planning authority practices and site constraints can vary considerably, particularly in conservation areas, rural settings and heritage-sensitive locations. A realistic programme should reflect the actual complexity of the site rather than just the date printed on the decision notice.
The most useful moment to review an approval is soon after it arrives. A clear implementation plan protects the value of the consent and gives the project the best chance of moving from permission to a well-built, properly coordinated outcome.