Planning Permission in London: What Actually Gets Approved?
Planning Permission in London: What Actually Gets Approved?
Planning permission is not a lottery. 90% of householder applications in England are approved. But London is a different story. Here is the data behind every approval, every refusal, and the specific things that separate applications that succeed from those that fail.
The Headline Numbers
"Will planning approve it?" It is the first question every homeowner, investor, and developer asks before committing to a project. The answer, nationally, is almost certainly yes. In the year ending December 2025, 90% of all householder planning applications in England were approved. Out of 154,500 decisions on householder applications, the vast majority were granted. And 93% of those decisions were made within 8 weeks or within an agreed extended timeframe.
Planning permission is not the barrier most people think it is. But London complicates the picture. London's overall householder approval rate is 85%, the worst-performing region in England. Seven London boroughs appeared in the ten lowest approval rate councils in the country in the year to March 2025. And the borough-level variation is enormous: from 64% in Hounslow to 98% in Hammersmith and Fulham. Same city, same planning system, wildly different outcomes.
Source: DLUHC Planning Application Statistics, year ending December 2025. London Forum, September 2025.
That 5% gap between London and the national average does not sound dramatic, but it translates to roughly 2,500 additional refusals per year across the capital. Behind each refusal is a homeowner who spent £548 on an application fee, paid for professional drawings, waited 8 weeks for a decision, and came away with nothing. Many of those refusals were avoidable.
The Borough Breakdown
This is the data no one publishes in a readable format. Below is every London borough ranked by householder planning approval rate, based on DLUHC statistics for 2025 and the London Forum's "Blockers and Approvers" analysis from September 2025.
The numbers reveal a pattern that challenges assumptions. Some of the wealthiest boroughs have the highest approval rates. Some of the most accessible boroughs have the lowest. And the London Forum's research found no correlation between delegation rate and approval rate. Whether your application goes to a planning officer or a committee makes far less statistical difference than most people believe.
| Rank | Borough | Approval Rate | Rating |
|---|---|---|---|
| 1 | Hammersmith & Fulham | 98% | Highest |
| 2 | Kingston upon Thames | 94% | Above 90% |
| 3 | Richmond upon Thames | 93% | Above 90% |
| 4 | Wandsworth | 92% | Above 90% |
| 5 | Bromley | 91% | Above 90% |
| 6 | Sutton | 89% | 80-89% |
| 7 | Westminster | 89% | 80-89% |
| 8 | Kensington & Chelsea | 88% | 80-89% |
| 9 | Merton | 88% | 80-89% |
| 10 | Bexley | 87% | 80-89% |
| 11 | Lewisham | 87% | 80-89% |
| 12 | Greenwich | 86% | 80-89% |
| 13 | Lambeth | 86% | 80-89% |
| 14 | Croydon | 85% | 80-89% |
| 15 | Southwark | 85% | 80-89% |
| 16 | Islington | 84% | 80-89% |
| 17 | Tower Hamlets | 83% | 80-89% |
| 18 | Hackney | 82% | 80-89% |
| 19 | Camden | 81% | 80-89% |
| 20 | Haringey ● | 80% | 80-89% |
| 21 | Waltham Forest ● | 79% | 70-79% |
| 22 | Havering | 78% | 70-79% |
| 23 | Barnet ● | 78% | 70-79% |
| 24 | Hillingdon | 77% | 70-79% |
| 25 | Newham | 76% | 70-79% |
| 26 | Harrow | 75% | 70-79% |
| 27 | Barking & Dagenham | 74% | 70-79% |
| 28 | Ealing | 73% | 70-79% |
| 29 | Enfield ● | 72% | 70-79% |
| 30 | Brent | 71% | 70-79% |
| 31 | Redbridge | 68% | Below 70% |
| 32 | Hounslow | 64% | Lowest |
● = Bashkal focus borough (North London). Sources: DLUHC Live Tables, year ending 2025. London Forum "Blockers and Approvers" report, September 2025. City of London excluded due to minimal householder volume.
What stands out is the concentration of lower-performing boroughs in outer London, particularly in the west and east. Hounslow's 64% approval rate means more than one in three householder applications are refused. In Hammersmith and Fulham, only 2 in 100 are turned down. The difference is not random. It reflects local planning culture, the volume and type of applications submitted, conservation area coverage, and the quality of submissions each borough typically receives.
One important finding from the London Forum's research: delegation rate has no correlation with approval rate. Enfield and Redbridge delegate nearly 100% of their planning decisions to officers rather than committees, yet both sit in the lower half of the table. Camden, Ealing, and Harrow are the only boroughs delegating less than 90% of decisions. The idea that "going to committee" is inherently riskier than an officer decision is a myth the data does not support.
For homeowners and investors in North London, the Bashkal focus boroughs sit between 72% and 80%. These are not the easiest boroughs to get planning approval in, but they are far from the hardest. In Haringey and Waltham Forest, roughly 4 in 5 applications are approved. In Enfield, closer to 7 in 10. The difference between approval and refusal in these boroughs almost always comes down to the quality of the application, not the attitude of the planning authority. For investors evaluating these boroughs, our research on HMO conversion demand across London covers the rental yield picture alongside these planning realities.
Why Applications Get Refused
The 10-15% of householder applications that get refused in London do not fail randomly. They fail for specific, predictable reasons. Understanding these reasons is the single most effective way to avoid becoming a statistic. Here are the six most common grounds for refusal, what they actually mean in practice, and how to prevent them.
Sources: Urbanist Architecture, PlanWatch 2026 Complete Guide, DLUHC planning refusal data.
Every one of these issues is identifiable before you submit an application. A competent feasibility assessment will flag all six. The cost of identifying them early is a fraction of the cost of a refusal, resubmission, and the months of delay that follow.
Before you apply: a feasibility assessment identifies exactly what is possible on your property, what the planning risks are, and how to structure the strongest possible application. Get in touch at info@bashkal.com or call 020 3740 7041 for a free consultation.
Permitted Development vs. Planning Permission
Not every project needs planning permission. Permitted development (PD) rights allow certain types of work without a formal application, subject to size limits and conditions. The question is not which route is easier. The question is which route creates more value.
Under current PD rules, you can extend a detached house by up to 8 metres to the rear (4 metres for semi-detached or terraced), build a rear dormer within certain limits, and add a single-storey side extension up to half the width of the original house. In 2025, the government proposed increasing the maximum ridge height under PD by 30cm without requiring planning permission, a change that could make the difference between a dormer that works and one that does not.
But PD has hard limits. It does not allow mansard conversions, front dormers, two-storey rear extensions, or wraparound extensions. And those are precisely the project types that unlock the most value. In the case studies from our previous research on extension value in London, the investor who pursued a mansard loft conversion (which required planning permission) could fit two bedrooms and a bathroom, turning a 2-bed into a 4-bed. Under PD, the same property could only accommodate a single rear dormer, enough for one bedroom but not enough to shift the property into a higher value bracket.
PD rules subject to conditions and local restrictions. Conservation areas and Article 4 directions may remove PD rights. Always verify before proceeding.
The value argument is straightforward: PD is faster, but planning permission unlocks more value. With a 90% national approval rate and 85% in London, the odds are firmly in your favour. And the application fee, £548, is trivial compared to the additional value a mansard, wraparound, or two-storey extension can create. The question is not whether you can avoid planning; it is whether avoiding it is costing you money.
The Cost of Getting It Right (and Wrong)
Planning is not expensive. Failed planning is expensive. The direct cost of a well-prepared householder application is manageable. The cost of getting it wrong, then trying to fix it, can set a project back by six months or more and add thousands to the final bill.
The real cost of planning is not the application fee. It is the cost of getting it wrong. A refusal means redesign fees, a second application, and months of delay during which build costs continue to rise. The Building Cost Information Service (BCIS) forecasts construction costs to increase by 14% over the next five years. Every month of avoidable delay is money lost. An appeal adds even more time: 6 to 12 months from submission to decision, with a 36% success rate for householder appeals. The cheapest insurance in property is getting the application right the first time.
Pre-Application Advice
Most London boroughs offer a pre-application advice service. You submit your proposed scheme informally and receive written feedback from a planning officer before committing to a full application. The cost varies by borough: typically £200 to £600 for a householder scheme. The value is knowing, before you spend thousands on detailed drawings, whether your approach has a realistic chance of approval. In boroughs with lower approval rates, such as Enfield (72%), Barnet (78%), or Waltham Forest (79%), a pre-application can be the difference between a confident submission and an expensive guess.
The Appeal Option
If your application is refused, you have the right to appeal under Section 78 of the Town and Country Planning Act. Householder appeals are decided by a planning inspector, typically via written representations rather than a hearing. Householder appeals succeed roughly 36% of the time (2024/25 data). The broader Section 78 category averages 33%, and overall appeal volumes reached a seven-year high in Q1 2025. Appeals are free to submit, but the professional costs of preparing a strong case, typically involving a planning consultant or solicitor, add up quickly. And the timeline is brutal: 6 to 12 months from submission to decision, during which your project sits frozen.
What Makes an Application Succeed
After nearly 30 years of working across London boroughs, the pattern is consistent. The applications that succeed share specific characteristics that the ones that fail do not. This is not generic advice. It is what we see, project after project, in the boroughs where we operate.
Precedent
Has it been done before on the same street? If three houses on your road have been granted loft conversions with rear dormers in the past five years, you are not asking for anything new. You are asking for something the council has already approved, multiple times, in the same context. Search your borough's planning portal for decisions on neighbouring properties. Planning officers notice when an application references successful precedents.
Design Quality
This is not about making something beautiful. It is about making something that demonstrates an understanding of the area. Materials that match or complement the existing building. Proportions that sit comfortably within the streetscape. Detailing that shows the designer has looked at the context, not just the floor area target. A generic box extension with no thought for its surroundings will get pushed back. A considered design that acknowledges the character of the street will not.
Neighbour Management
Have you spoken to your neighbours before the application goes in? It sounds simple, but it is one of the most overlooked steps. A neighbour objection does not automatically mean refusal, but it triggers closer scrutiny. Showing the planning officer that you have engaged with affected neighbours, addressed their concerns where reasonable, and designed with their amenity in mind is a powerful signal. In tight-knit North London streets where terraced houses share party walls, this matters more than in detached suburban settings.
Officer Engagement
A pre-application meeting, where available, gives you direct feedback from the officer who will likely assess your full submission. Use it. Ask specific questions: is the scale acceptable, are there material concerns, are there particular policies you should address in your design and access statement? The officer is not your opponent. They are the person who needs enough evidence to recommend approval. Give them that evidence.
Drawing Quality
The difference between a sketch and a proper set of professional drawings is the difference between an application that a planning officer takes seriously and one that raises immediate concerns. Professional drawings include accurate site plans, floor plans, elevations, sections, and a clear design and access statement. They demonstrate that the project has been thought through, measured, and designed to comply with regulations. Drawings that look rushed or incomplete tell the officer that the project probably is.
Conservation Area Strategy
If your property is in a conservation area, your application needs to work within tighter constraints. Permitted development rights may be restricted. Materials are scrutinised more carefully. Roof profiles, window proportions, and boundary treatments all come under review. The key is to frame your application as an enhancement to the area, not a departure from it. Reference the conservation area appraisal. Show that your design has been shaped by the local context, not imposed onto it. Conservation areas are not a barrier to development; they are a framework that requires a more thoughtful approach.
Five Questions Before You Apply
Before you spend a penny on an application, answer these five questions. If you can tick all five, you are in a strong position. If you cannot, you know exactly where to focus your preparation.
Planning permission is predictable when you understand the system. The national data is clear: 90% of householder applications are approved. In London, the odds are slightly tighter, but 85% still means the vast majority succeed. The boroughs where applications fail most often are the boroughs where applications are prepared least carefully.
The biggest factor in success is not which borough you are in, not whether your application goes to an officer or a committee, and not whether you are in a conservation area. The biggest factor is preparation quality. Precedent research, professional drawings, neighbour engagement, officer dialogue, and a clear understanding of what the planning authority needs to see. These are not expensive steps. They are the cheapest insurance in property.
The most expensive mistake is not a planning refusal. It is the application you rushed because you assumed it would be fine, the refusal you did not expect, and the six months of delay and rising costs that followed.
Send us a postcode and we will tell you what is possible. Reach us at info@bashkal.com or 020 3740 7041 for a free consultation.
Sources
Planning Applications in England: October to December 2025, DLUHC, 2026
Live Tables on Planning Application Statistics, DLUHC, 2026
Blockers and Approvers: Rates of Delegation and Approval for Planning Applications, London Forum, September 2025
Planning Appeal Success Rates and Timescales, Appeal Finder, 2025
Planning Appeals on the Rise, Savills, 2025
Planning Application Fee Schedule, Planning Portal / GOV.UK, April 2025
The Cost of a Planning Application 2026, Architecture for London, 2026
Planning Permission Process: Complete Guide 2026, PlanWatch, 2026
Planning Permission Refusal: Top 10 Reasons, Urbanist Architecture, 2025
Councils with Highest and Lowest Approval Rates, Planning Resource, 2025
