Three days from now, the rules for who approves your loft conversion or rear extension change permanently. Starting 31 October 2026, planning officers decide extensions in nearly every London borough, stripping ward councillors and planning committees of the power to intervene in most householder applications. If you are currently drawing up plans, or you have a neighbour who is, this shift matters more than most people realise.
This is not a tweak to planning policy. It is a structural overhaul of who holds the pen on your decision notice. And it arrives alongside a separate, unchanged legal duty that still trips up homeowners every year: the Party Wall Act 1996.
Key Takeaways
- From 31 October 2026, planning officers decide extensions and loft conversions under a new National Scheme of Delegation, committees are no longer involved in standard householder applications.
- Ward councillors can no longer “call in” applications, and public objection numbers no longer force a committee hearing.
- Larger schemes (Schedule 2) can still reach committee, but only if they pass a statutory significance test and get sign-off from both a senior officer and a nominated councillor.
- Planning permission and Party Wall Act consent remain entirely separate. Getting planning approval does not remove your legal duty to serve party wall notices.
- Homeowners should align their party wall notice timeline with their planning application from the outset, not after approval lands.
Why Planning Officers Decide Extensions From 31 October 2026
The change comes from the Town and Country Planning (Discharge of Local Planning Authority Functions) (England) Regulations 2026, following government guidance published on 1 June 2026. It introduces a National Scheme of Delegation that every council in England must adopt.
Under Schedule 1 of the new scheme, officers, not committees, must decide:
- Householder applications, including extensions and loft conversions
- Minor commercial development
- Minor residential development of up to 9 homes on sites under 0.5 hectares
- Reserved matters and discharge of conditions
- Prior approval for permitted development rights
- Permission in principle
- Non-material amendments
- Certificates of lawfulness
- Biodiversity gain plans
This is the category almost every London homeowner’s extension, side return, or loft conversion falls into. Once the scheme applies, your application goes to a planning officer’s desk for a delegated decision. There is no councillor vote, no committee agenda item, and no public meeting where neighbours can argue their case in person.
When a Committee Can Still Get Involved
Larger or more complex schemes move to Schedule 2. Even there, committee referral is now the exception rather than the norm. For a Schedule 2 application to reach committee, it must pass a statutory significance test, and both a nominated senior planning officer and a nominated committee member must agree to the referral.
Exceptions also apply where an application is linked to listed building consent, is retrospective under section 73A, or is submitted by or on behalf of the council itself. These cases bypass the officer-only route and can still go to committee without the significance test.
Councils are required to update their constitutions to reflect these rules and publish records of every referral decision. Planning committees themselves are now capped at 13 councillors. Legal commentary, including guidance from law firm Freeths, has warned that committee decisions made in breach of the new scheme could be vulnerable to judicial review.
What Changes in Practice for Homeowners
The headline effect: ward councillors can no longer call applications in, and a set number of public objections no longer automatically triggers a committee hearing. For years, a vocal group of neighbours writing to their councillor could sometimes force a straightforward extension into a committee room, adding months of delay and uncertainty. That route has effectively closed for standard householder schemes.
This has several practical consequences.
More consistency, less local politics. Decisions now rest on planning policy and officer judgement rather than ward-level lobbying. A well-designed, policy-compliant extension should move through the system on its merits.
Design compliance matters more than ever. Since officers are applying published planning policy directly, schemes that sit comfortably within permitted development thinking and local design guidance are far more likely to sail through without drama.
Objections still count, but differently. Neighbours can still object, and officers must consider those objections. What has changed is that objections alone no longer force escalation to committee. The officer weighs them against policy and decides.
Faster, but not guaranteed faster for everyone. Removing the committee bottleneck should reduce delay for the vast majority of standard cases. Complex or controversial Schedule 2 schemes may still face the same scrutiny as before.
Permitted Development Limits Have Not Moved
It is worth stressing: this reform changes who decides, not what you’re allowed to build. The physical limits for permitted development remain exactly as they were.
| Type of work | Limit |
|---|---|
| Single-storey rear extension (terraced/semi) | 3m, extendable to 6m under prior approval |
| Single-storey rear extension (detached) | 4m, extendable to 8m under prior approval |
| Two-storey rear extension | 3m |
| Maximum single-storey height | 4m |
| Loft conversion volume (terraced) | 40m³ |
| Loft conversion volume (detached/semi) | 50m³ |
| Garden coverage | No more than 50% built on |
Under the prior approval neighbour consultation scheme, neighbours still get 21 days to comment, and the council still has 42 days to decide. None of that machinery has changed, only the committee layer above standard applications has gone.
Planning Officers Decide Extensions, But the Party Wall Act Still Applies
This is the point many homeowners miss, and it is the one that causes real problems on site. Planning permission and Party Wall Act consent are two completely separate legal processes. Securing a swift decision from a planning officer does nothing to discharge your duty under the Party Wall Act 1996.
If your project involves:
- Work to a shared wall with a neighbour
- Building on or astride the boundary line
- Excavating within 3 metres (or 6 metres in some cases) of a neighbour’s foundations, where your work goes below their foundation level
…you must serve formal notice. The standard timeframes are two months’ notice for party structure works, and one month’s notice for new walls at the boundary and for adjacent excavation. Neighbours then have 14 days to respond. If they dissent, the matter proceeds to a Party Wall Award, prepared by either an agreed surveyor or two surveyors, one appointed by each side.
Planning approval tells you that you can build. The Party Wall Act governs how you build next to a neighbour. One does not replace the other.
Timing Your Notices Around the New Decision Process
With planning officers now deciding extensions faster and with fewer delays, many homeowners may find themselves approved and ready to build sooner than expected. That makes early party wall planning even more important. Serve notices once your design is settled, ideally while your planning application is still being assessed, rather than waiting for the decision notice to land. This avoids a scenario where planning is approved but party wall matters stall your start date by weeks or months.
FAQ
Does the 31 October 2026 change affect permitted development rights? No. Permitted development limits and the prior approval process remain unchanged. Only the decision-making route for applications requiring full planning permission has shifted.
Can my neighbours still object to my extension after this change? Yes. Objections are still considered by the planning officer. What has ended is the automatic escalation to committee based on objection numbers.
Will my application be decided faster now that planning officers decide extensions? Likely yes for standard householder applications, since the committee bottleneck is removed. Complex or Schedule 2 cases may still take longer.
Do I still need Party Wall Act notice if I have planning permission? Yes. Planning permission and the Party Wall Act are entirely separate legal requirements. Planning approval does not substitute for party wall notice or consent.
What happens if my neighbour dissents to my party wall notice? A Party Wall Award is prepared, either by a surveyor agreed by both parties or by two surveyors, one for each side, resolving the terms of the works.
Can a council still send my extension to committee? Only if it falls under Schedule 2 and passes the statutory significance test with sign-off from a senior officer and a nominated committee member, or falls under specific exceptions like listed building links or retrospective applications.
Conclusion
The move to officer-only decisions for standard applications marks one of the most significant procedural shifts in English planning in years. For London homeowners, the message is clear: policy-compliant, well-prepared extension plans should move through the system more predictably once planning officers decide extensions without committee interference. But this reform says nothing about your neighbour’s legal rights under the Party Wall Act 1996.
Before you submit your application or break ground, get your party wall notices drafted and timed correctly. Speak with Party Wall Surveyor London to confirm your notice requirements, align your timeline with your planning submission, and avoid a situation where a fast planning decision is undermined by an unresolved party wall dispute.