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A single-storey rear extension with glazed doors opening onto a paved London garden
SE11 · Kennington · Lambeth

Planning and building regulation drawings in Kennington (SE11)

SE11 sits across two very different building stories. Walk the Georgian terraces around Cleaver Square in Kennington and you're looking at houses that have barely changed their outline since the early 1800s: flat-fronted, three or four storeys, brick facades that the council watches closely. Head south toward Vauxhall and the picture shifts to a patchwork of surviving period terraces, mansion blocks, and newer riverside apartments near Nine Elms. Both halves of the district ask homeowners to think carefully before they draw a single line, just for different reasons.

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  • London Borough of Lambeth granted 81% of 610 householder applications
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In Kennington, the constraint is almost entirely about appearance. Streets like Cleaver Square, Cardigan Street, Courtenay Street and Kennington Road carry the same flat-fronted Georgian character, and a loft conversion with a rooflight or dormer gets more scrutiny than it would elsewhere once a design crosses into the conservation area nearby, which treats rooflines, materials and front elevations as things worth protecting. Many of these houses have already been split into flats, so a rear or lower-ground extension often needs to work around shared ownership and party-wall agreements before the design even reaches planning. In Vauxhall, the pressure comes from density and setting. Streets such as Tradescant Road, Bolney Street, Glasshouse Walk and Worgan Street carry a mix of older terraces and flatted buildings where rear-extension depth is tightly controlled, and the riverside regeneration around Albert Embankment has pushed the council to expect a higher townscape standard from anything new. Converting a house into flats needs planning permission in either part of the district; nobody gets to skip that step because the building already looks like it could hold several households.

Planning in Kennington: what to know before you apply

Lambeth reviews SE11 applications with conservation status as the first question, not an afterthought. In Kennington, that means checking the Kennington Conservation Area boundary and the Walcot Conservation Area, which clips the northern edge of the outcode and adds a second appraisal to satisfy before a design goes forward. A side extension inside either boundary isn't permitted development, so it needs a full application even when the same project would qualify as-of-right on an unlisted street. Vauxhall applications sit inside a denser set of conservation pockets, including the Vauxhall Gardens and Albert Embankment areas, where the council pays close attention to how a new elevation or roof addition reads against the surrounding terraces. Ownership structure matters just as much as the planning route here: with so much of the stock converted into flats, Lambeth expects drawings that account for shared access, party-wall implications and internal separation, not just the elevation the street will see.

Applications are decided by London Borough of Lambeth its planning pages.

Check your route

Does your Kennington project need planning permission?

Route check · Kennington (SE11)

Listed building?
Conservation area?
Likely permitted development — no planning applicationNeeds checking
  • A single-storey rear extension up to 4 m deep on a detached house, or 3 m on any other house, is Class A permitted development subject to the height and materials conditions.
  • An Article 4 direction applies here and may withdraw this freedom — the schedule must be checked before relying on it.
  • One or more constraints are unknown — we check the council's registers as part of the free appraisal.
  • Where permitted development applies, a lawful development certificate proves it for lenders and buyers.

Sources: GPDO 2015, Schedule 2, Part 1 · Planning Portal — common projects · Building Regulations 2010 — when approval is needed

This is a first-pass indication from the national rules, not planning advice for your property. Your council's registers, any Article 4 schedule and the exact dimensions decide it — the free appraisal checks all three before we recommend a route.

Confirm it with a free appraisal

Kennington (SE11) in numbers

What London Borough of Lambeth has decided, and what SE11 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Lambeth

Kennington (SE11) applications are decided by London Borough of Lambeth; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1610
Granted496
Refused114
Grantedof 610 decisions · England 90%81%
Decided within 8 weeksof 397, excluding prior approvals95%

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Permitted development prior approvals — London Borough of Lambeth

How the larger-home-extension route has fared with London Borough of Lambeth, which decides SE11 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q138
Prior approval granted37
Prior approval refused40
Grantedof 77 determined48%

Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Planning appeals — London Borough of Lambeth

Refusals in SE11 can be appealed to the Planning Inspectorate; this is London Borough of Lambeth's householder appeal record.

Householder appeals determined2021–2026208
Allowed70
Allowedof 208 · England 36%34%

Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.

Conservation areas and Article 4 directions — London Borough of Lambeth

Register counts for London Borough of Lambeth. A count describes what the council has published, never a rank against another council.

Conservation areas in the register62 dated, 1968–200965
Article 4 directions in the register12
Areas covered by an Article 4 direction223

Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.

What SE11 is built of

Residential building form across Kennington (SE11), from 291 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side73%
Attached on one side23%
Detached4%
Median building footprint59 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate4.87
Buildings classified291

Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-09-22.

  1. Day 0Measured survey of your Kennington property — or your existing plans if you have them.
  2. About 7 daysDrawings issued for your approval. Free redraws until you are happy.
  3. SubmissionWe validate against London Borough of Lambeth’s checklist and submit on your behalf.
  4. Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Lambeth decided 95% of 397 recent householder applications inside it.

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

FAQ

Kennington (SE11) — FAQs

Does my house in Kennington need a full planning application for a loft conversion?+
It depends on where the roofline changes and what it looks like from the street. Inside the Kennington Conservation Area, dormer and rooflight choices get checked against the area's character, so a design that would pass as permitted development on a normal terrace can still need a full application here. We check the exact boundary and the appraisal for your street before assuming either way.
Is there an Article 4 direction affecting single-house extensions in SE11?+
Not in the way many homeowners expect. Lambeth's HMO Article 4 direction targets conversions from a single dwelling into a house in multiple occupation, and it currently applies to other parts of the borough rather than blanket single-dwelling permitted development rights across Kennington or Vauxhall. That said, conservation-area rules in both areas already narrow what counts as permitted development, so the practical effect can feel similar even without a direction naming the street.
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