How Long Does Planning Permission Take in London? (2026)

The statutory determination periods

The formal clock is set by national regulations. A householder or minor application has a statutory target of eight weeks from the date the council validates it. A major application — broadly ten or more dwellings, or larger commercial schemes — has thirteen weeks, or sixteen weeks where an Environmental Impact Assessment is required. These are the periods within which the council is expected to decide, and against which its performance is measured, but they start only once the application is validated, not the day you submit it.

• Householder / minor application — 8 weeks from validation
• Major application — 13 weeks (16 with an EIA)
• Prior approval — commonly 8 weeks, some routes 42–56 days
• Lawful Development Certificate — 8 weeks

Validation: the hidden weeks before the clock starts

The statutory period does not begin when you press submit — it begins when the council validates the application, confirming the forms, fee, drawings and supporting documents are all correct and complete. In a busy London borough validation can take one to three weeks, and an incomplete submission is returned for correction, resetting the wait. This is the single most controllable part of the timeline: a complete, correctly scaled and clearly annotated set of drawings validates quickly, while a patchy submission can lose a fortnight before it is even registered. Validation speed also varies markedly between boroughs — a well-resourced planning department may register a clean application within days, while a stretched one can take the full three weeks even when nothing is wrong with the submission. You cannot control the borough's caseload, but you can make sure your application is never the one sitting in the correction pile, and that alone often moves your decision date forward by several weeks.

What happens during the determination period

Once validated, the application enters a set sequence. The council carries out a statutory public consultation — usually 21 days — notifying neighbours and sometimes posting a site notice. A planning officer then assesses the scheme against local and national policy, may seek amendments, and consults internal specialists such as highways, trees or conservation. Most householder cases are decided by officers under delegated powers; a minority go to a planning committee, which adds weeks because it must wait for the next scheduled meeting. The 21-day consultation running inside the eight weeks is why late-stage changes are so costly to the timeline.

• Statutory neighbour consultation — usually 21 days
• Officer assessment against local and national policy
• Internal consultees — highways, trees, conservation, drainage
• Delegated decision (most cases) or committee (adds weeks)

What actually causes delay?

Delays rarely come from the statutory period itself and usually from four avoidable sources: an incomplete submission that fails validation; drawings that prompt the officer to request amendments, restarting parts of the process; neighbour objections that push a delegated case toward committee; and specialist consultation, such as a conservation officer or tree report, that the case must wait on. Occasionally the council asks the applicant to agree an extension of time rather than refuse a nearly-there scheme. A complete, policy-aware application designed to anticipate the officer's questions is the most reliable way to hit the eight-week target.

• Failed validation from an incomplete submission
• Officer-requested amendments mid-process
• Objections escalating a case to committee
• Waiting on specialist consultees or reports

So what is the realistic total?

For a straightforward householder scheme in London, the realistic end-to-end timeline from finished drawings to decision is usually about three to four months: a week or two for validation, the eight-week determination, and a little contingency for consultation and any minor amendments. A permitted-development prior approval or a Lawful Development Certificate can be quicker because there is less to judge. Complex, contested or committee-bound schemes take longer. We plan the programme around these realities and prepare the application to move through validation and determination without avoidable delay.

How can I speed up a planning application in London?

The parts of the timeline you can influence are almost all at the front. Once an application is validated the statutory clock runs at a fixed pace you cannot accelerate, so the real gains come before submission — in the completeness of the drawings, the way the design pre-empts policy objections, and the groundwork done with neighbours and, on borderline schemes, the planning officer. A homeowner who invests a fortnight up front in a clean, policy-aware submission routinely saves a month or more at the back end, because the case never bounces at validation and the officer never has to stop and ask for revisions.