Track the latest renovation and development activity in Belsize Park. We monitor planning applications across Camden to help you understand what's possible on your street.
| Address | Project Type | Status | Date | Description |
|---|---|---|---|---|
| 80 Lancaster Grove, NW3 | Side Return Extension | Approved | 26 Mar 2026 | Side return and rear extension creating open-plan kitchen-dining space |
| 68 Howitt Road, NW3 | Loft Conversion | Approved | 25 Mar 2026 | Hip-to-gable loft conversion with new dormer to rear elevation |
| 35 Buckland Crescent, NW3 | Basement Conversion | Approved | 19 Mar 2026 | Full basement dig-out creating cinema room, gym and utility space |
| 72 Howitt Road, NW3 | Full Refurbishment | Approved | 16 Mar 2026 | Full renovation of period property including restoration of original features |
| 42 Adamson Road, NW3 | Mansard Extension | Approved | 6 Mar 2026 | Mansard extension to rear roof slope with new dormer windows |
| 71 Howitt Road, NW3 | Basement Conversion | Approved | 5 Mar 2026 | Full basement dig-out creating cinema room, gym and utility space |
| 31 Eton Avenue, NW3 | Listed Building Consent | Pending | 26 Feb 2026 | Restoration of original sash windows and front door to listed property |
| 48 Belsize Lane, NW3 | Full Refurbishment | Approved | 24 Feb 2026 | Internal reconfiguration and modernisation of all floors with new kitchen and bathrooms |
| 72 Belsize Park Gardens, NW3 | Listed Building Consent | Under Review | 19 Feb 2026 | Installation of discreet secondary glazing to all windows of listed building |
| 58 Primrose Gardens, NW3 | Basement Conversion | Pending | 12 Feb 2026 | Single-storey basement extension with front and rear lightwells |
| 73 Primrose Gardens, NW3 | Change of Use | Refused | 28 Jan 2026 | Conversion from commercial (Class E) to residential (Class C3) use |
| 51 Lawn Road, NW3 | Rear Extension | Approved | 16 Jan 2026 | Single-storey rear extension under permitted development rights |
| 74 Adamson Road, NW3 | Full Refurbishment | Under Review | 1 Jan 2026 | Complete internal refurbishment including new mechanical and electrical services |
| 43 Belsize Square, NW3 | Listed Building Consent | Pending | 21 Dec 2025 | Sensitively designed rear extension to Grade II listed terraced property |
| 53 Buckland Crescent, NW3 | Basement Conversion | Approved | 11 Dec 2025 | New basement level with front lightwell, providing additional living accommodation |
| 14 Belsize Avenue, NW3 | Loft Conversion | Approved | 27 Aug 2025 | Conversion of existing loft space to create additional bedroom and en-suite bathroom |
| 60 Howitt Road, NW3 | Demolition & Rebuild | Pending | 25 Aug 2025 | Complete demolition and rebuild of war-damaged property to original design |
| 31 Eton Avenue, NW3 | Roof Terrace | Approved | 5 Apr 2025 | Formation of terrace on existing flat roof with external staircase access |
| 78 Belsize Park Gardens, NW3 | Rear Extension | Approved | 27 Feb 2025 | Single-storey rear extension with flat roof and glazed lantern light |
Belsize Park has seen strong renovation activity over the past twelve months, with basement conversions accounting for 21% of all planning applications. Full Refurbishments follow at 16%, with listed building consents making up a further 16% of submissions. This pattern reflects the character of Belsize Park's housing stock and the aspirations of homeowners in the NW3 postcode.
As a designated conservation area, Belsize Park requires all external alterations to be sympathetically designed and built using appropriate materials. Planning officers at Camden Council pay close attention to proposals that affect the streetscape, particularly along prominent roads such as Belsize Park Gardens and Belsize Avenue. Despite these additional requirements, our data shows a 63% approval rate for applications in the area — evidence that well-prepared submissions continue to succeed.
The most active streets for development in Belsize Park include Belsize Park Gardens, Belsize Avenue, Belsize Square, where homeowners are investing in both extending and upgrading their properties. Basement conversions remain particularly popular among larger detached and semi-detached properties, often incorporating lightwells, cinemas, and additional living space beneath existing footprints.
Properties in Belsize Park (NW3) typically range from period terraces to substantial detached homes. Whether you are considering a straightforward loft conversion or a comprehensive basement dig, early engagement with Camden Council's planning department — and appointing an architect familiar with local policy — will significantly improve your chances of a smooth approval. Our team maintains an outstanding track record across the NW3 postcode.
Camden Council manages planning applications across Belsize Park and the wider borough. As a conservation area, Belsize Park is subject to additional planning controls. Permitted development rights may be restricted under Article 4 directions, meaning proposals that would normally not require planning permission may need a formal application.
For advice on what you can build in Belsize Park, see our Planning & Permissions guide. You can also review our planning track record to see our approval rates across London boroughs.
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