Westminster / Camden
We design rear extensions in St John’s Wood for villa plots, garden settings and narrower terraces after confirming whether Westminster or Camden is responsible for the complete address and application site. Tenure, mapped controls and garden context lead; catalogue depth does not.
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The short answer
A rear extension may be feasible after the complete address, application site, legal building type, council, mapped controls, planning history, neighbour relationship and title or lease are checked. We then prepare the applicable public, private and technical packages without predicting consent.
Planning at a glance
St John's Wood
| Local planning authority | Westminster City Council or London Borough of Camden — confirm the exact address |
|---|---|
| Postcode districts | NW6 / NW8 |
| Likely approval route | Householder planning application or permitted development, depending on conservation status, listing and property type — confirmed for the exact address before drawings begin |
| Statutory determination time | 8 weeks for most householder applications (13 weeks for major applications) |
| Local planning note | St John’s Wood and NW8 are place and postcode descriptions, not local-authority or conservation-area boundaries. Confirm the complete address and application site before using council material. For a Westminster site, use the City Plan 2019–2040 (2026), current policies map and the mapped conservation-area, Article 4, listing, tree and planning-history records. For a Camden site, the Camden Local Plan 2017 remains current; the Proposed Submission Draft is still at examination and must not be described as adopted. Use Camden’s mapped conservation-area appraisal, Article 4, listing, tree and planning-history records for the exact site. Westminster and Camden maintain separate St John’s Wood conservation records, so do not infer one designation or adoption date from the neighbourhood or postcode. Westminster’s city-wide basement Article 4 direction came into force on 31 July 2016; Camden’s borough-wide basement direction was adopted on 1 June 2017. Other Article 4 controls are address- and operation-specific. Westminster’s basement policy and Code of Construction Practice and Camden’s Policy A5 and Basement Impact Assessment process are separate. Planning permission, listed-building consent, title or landlord consent, Building Regulations or BSR approval, Party Wall procedures and tree controls remain separate. |
| Typical drawing package | £1,450–£1,950 inc. VAT, fixed fee. Find my package → |
A St John’s Wood rear extension can involve a villa plot where the mapped garden context is relevant to the proposal. Depth is not sold from a Hampstead closet-wing template.
The applicable council record and live map establish whether conservation considerations engage the site. We identify the legal building type first: dwellinghouse, converted property or managed apartment.
The complete address and application site decide whether Westminster or Camden policy, validation requirements, planning history and Article 4 records apply. We confirm those facts before selecting a council process.
For a mansion-block or lateral flat, the title, lease and landlord requirements decide whether a private alteration pack is needed for a rear terrace or conservatory-style proposal. That route is kept separate from planning.
Garden depth and mature planting can limit projection as much as the 45-degree amenity test. Sections show trees, levels and neighbour windows together.
For a qualifying dwellinghouse, we test the actual operation against every relevant GPDO limitation and condition, planning-history restriction and live Article 4 direction. Where the route is available we can prepare LDC drawings; otherwise we prepare the applicable planning package with complete elevations and sections.
Building regulations drawings cover structure, insulation and drainage after the envelope freezes. Where the actual work engages Party Wall procedures or landlord review, those separate timings are stated rather than inferred from the place-name or building type.
Compared with a Hampstead closet-wing terrace or a Highgate site, the useful distinction is not an assumed borough proportion. The complete St John’s Wood address, application site, legal building type and mapped records determine the route.
Related routes include house extension architects, Licence to Alter drawings for flats, and building regulations drawings.
A useful first pack is the address, lease notes if multi-unit, rear and garden photos, and a short brief. We will not freeze depth until authority and tenure are clear.
Delivery sequence: complete address and site → authority and legal building type → mapped controls and title or lease → survey → massing against relevant garden context → PD/LDC or planning → landlord consent if required → building regulations and tender.
Party Wall procedures and rights of light are separate, proposal-specific checks. We review the measured boundaries, neighbouring openings, foundations and proposed work before saying that either route engages.
Local analysis
Where the applicable council map and appraisal engage a villa street or garden setting, rear bulk, planting, depth and neighbour outlook should be assessed against that address-specific context.
We freeze garden relationship and materials with massing, not after joinery is chosen.
Use the complete address and application site in the official council finder before preparing forms or applying policy. Neither St John’s Wood nor NW8 selects Westminster or Camden.
Conservation and Article 4 records are council-, address- and operation-specific. Read the live map and operative direction rather than importing an assumption from another postcode or street.
For a lateral flat or mansion-block home, the title, lease and landlord requirements decide whether structural, drainage or external work needs a Licence to Alter or another written consent.
One measured model should serve freeholder and council audiences so openings do not diverge.
This page owns rear house extensions and dual-track consent on villa and terrace stock. It is not a dormer loft product and not a wraparound dual-boundary product.
Whole-house refurbishment and freeholder-only internal works sit on other owners.
Thinking about a project in St John's Wood?
Send the address and a short description. We will confirm the likely approval route and the drawings your project needs.
Local planning
Use the complete address and mapped application site to establish whether Westminster or Camden is responsible before selecting policy, validation requirements or planning history.
The councils maintain separate St John’s Wood conservation records. Check the live map for the complete site and use only the applicable appraisal; the place-name and postcode do not establish a designation or Article 4 control.
For a flat or lateral apartment, read the title, executed lease and current landlord requirements before assuming that a Licence to Alter or another form of consent is required. Any private consent remains separate from planning.
Villa streets and garden landscapes shape rear bulk and materials differently from mid-terrace closet-wing grain in NW3.
Mature planting and garden depth can control projection as much as neighbour daylight tests.
For the wider local-authority picture — policies, timescales and application routes — see planning in Westminster.
Services
Extensions & Renovations
Planning & Consents
Technical & Building Regulations
Leasehold & Licence to Alter
Nearby
Send your St John's Wood address, lease notes if multi-unit, and rear garden photos. We will confirm authority, tenure track and fixed-fee next step.
