London home extensions approved by postcode (2026)
1,433 approved and 339 refused householder projects across 41 London postcode districts — extensions, lofts, basements and conversions. What actually gets approved, where.
What gets approved most
| Project type | Approved | Refused | Approval rate |
|---|---|---|---|
| Rear extensions | 471 | 99 | 83% |
| Loft conversions | 434 | 150 | 74% |
| Basements | 275 | 65 | 81% |
| Garage conversions | 70 | 8 | 90% |
| Side extensions | 68 | 8 | 89% |
| Wraparounds | 51 | 4 | 93% |
| Side returns | 51 | 3 | 94% |
| Second-floor extensions | 13 | 2 | 87% |
Every district we hold
Click a district to see the individual approved schemes near it.
| District | Borough | Approved | Refused | Approval rate | Most approved |
|---|---|---|---|---|---|
| NW11 | Barnet | 94 | 24 | 80% | Rear extensions |
| NW4 | Barnet | 91 | 15 | 86% | Loft conversions |
| SE5 | Southwark | 83 | 11 | 88% | Loft conversions |
| N15 | Haringey | 82 | 6 | 93% | Loft conversions |
| SW19 | Merton | 62 | 5 | 93% | Rear extensions |
| SE22 | Southwark | 50 | 14 | 78% | Rear extensions |
| SW17 | Wandsworth | 49 | 7 | 88% | Rear extensions |
| NW5 | Camden | 44 | 8 | 85% | Rear extensions |
| SW12 | Wandsworth | 44 | 4 | 92% | Loft conversions |
| SW11 | Wandsworth | 43 | 5 | 90% | Basements |
| N17 | Haringey | 42 | 15 | 74% | Loft conversions |
| SW10 | Kensington and Chelsea | 40 | 11 | 78% | Rear extensions |
| SW15 | Wandsworth | 40 | 5 | 89% | Rear extensions |
| E5 | Hackney | 39 | 21 | 65% | Loft conversions |
| W12 | Hammersmith and Fulham | 38 | 2 | 95% | Side returns |
| N22 | Haringey | 36 | 12 | 75% | Loft conversions |
| E8 | Hackney | 33 | 3 | 92% | Rear extensions |
| NW1 | Camden | 33 | 11 | 75% | Basements |
| W14 | Hammersmith and Fulham | 33 | 18 | 65% | Basements |
| N1 | Islington | 28 | 4 | 88% | Basements |
| N10 | Haringey | 28 | 3 | 90% | Rear extensions |
| N4 | Islington | 28 | 10 | 74% | Loft conversions |
| N8 | Haringey | 28 | 7 | 80% | Rear extensions |
| NW6 | Brent | 28 | 10 | 74% | Basements |
| SE15 | Southwark | 28 | 16 | 64% | Garage conversions |
| SE1 | Southwark | 26 | 6 | 81% | Basements |
| W6 | Hammersmith and Fulham | 26 | 0 | 100% | Rear extensions |
| N16 | Hackney | 25 | 17 | 60% | Basements |
| SW18 | Wandsworth | 25 | 1 | 96% | Rear extensions |
| W11 | Kensington and Chelsea | 25 | 3 | 89% | Basements |
| NW3 | Camden | 23 | 7 | 77% | Loft conversions |
| SE24 | Lambeth | 20 | 11 | 65% | Rear extensions |
| N5 | Islington | 19 | 2 | 90% | Rear extensions |
| N7 | Islington | 19 | 7 | 73% | Rear extensions |
| W10 | Kensington and Chelsea | 17 | 8 | 68% | Rear extensions |
| SW6 | Hammersmith and Fulham | 15 | 5 | 75% | Loft conversions |
| E9 | Hackney | 14 | 2 | 88% | Garage conversions |
| EN5 | Barnet | 14 | 19 | 42% | Rear extensions |
| E10 | Waltham Forest | 11 | 0 | 100% | Wraparounds |
| E2 | Hackney | 9 | 4 | 69% | Basements |
| E1 | Tower Hamlets | 1 | 0 | 100% | Basements |
Method: decided householder applications within about a mile of each postcode district, read from public council planning records and checked to sit in the right place. Neighbouring districts overlap, so a scheme near a boundary can appear in two of them and the totals may count it twice. Counts show what tends to be approved, not a promise for any one scheme. Free to cite with a link to this page (CC BY 4.0). Updated 21 September 2026.
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