Basement Conversions · SE22 East Dulwich
SE22 is decided by Southwark Council. East Dulwich is one of London's strongest family-extension markets — rows of Victorian and Edwardian bay-fronted terraces ideal for side-return and rear extensions and loft dormers, mostly outside conservation areas, though the Dulwich fringe and Estate land carry tighter controls.
Working across the whole borough rather than just this area? See basement conversions in Southwark.
Basement conversions and lowering existing cellars in East Dulwich add space without touching the roofline — valuable on SE22's period houses around East Dulwich, Lordship Lane, Peckham Rye, Dulwich. Southwark Council reviews structural, drainage and flood-risk impact, and a Party Wall award plus a Thames Water build-over agreement are usually required. We coordinate the structural engineer and the waterproofing design.
Full architectural technology service for basement digs and cellar conversions in East Dulwich — structural underpinning design, waterproofing strategy, Party Wall coordination, planning where required, and building regulations through to completion certificate.
Across East Dulwich, Lordship Lane, Peckham Rye, Dulwich in SE22, the dominant property is victorian and edwardian terraces and bay-fronted villas across east dulwich, with larger semi-detached houses towards dulwich and the lordship lane shopping streets. That stock shapes what basement conversion drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Southwark Council judges each on design quality and neighbour impact. We survey the specific East Dulwich property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE22 streetscape.
Housing stock in SE22: Victorian and Edwardian terraces and bay-fronted villas across East Dulwich, with larger semi-detached houses towards Dulwich and the Lordship Lane shopping streets.
Within the district: East Dulwich, Lordship Lane, Peckham Rye, Dulwich.
Conservation areas: East Dulwich, Dulwich Village fringe, Peckham Rye. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE22: East Dulwich and North Dulwich (Southern), Peckham Rye nearby.
Property values: approx £750k, £1.5m for houses, £725k for flats (Land Registry, 2024), a useful gauge of the build value an extension or loft adds in SE22.
Borough character: Dulwich Estate private planning scheme affects much of SE21 and SE22; Southwark planning for rest of borough; strong heritage context.
Desktop study plus measured survey assessing existing foundations, ground conditions, water table level and underpinning viability for your East Dulwich property.
New-build basements and lightwell extensions need planning permission. Cellar conversions of existing space are usually Permitted Development. We confirm the route and submit where needed.
Underpinning sequence drawings, reinforced concrete design, temporary works strategy — all to Eurocode with chartered engineer sign-off.
BS 8102:2022 compliant — cavity drain, cementitious tanking or membrane system specified for East Dulwich's ground conditions and water table.
Full Plans application to Southwark Council Building Control or an approved inspector covering structure (Part A), fire safety (Part B), damp-proofing (Part C), ventilation (Part F) and thermal performance (Part L).
Almost every East Dulwich basement triggers Party Wall notices. We also manage Thames Water Build Over Agreements where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
East Dulwich SE22 is dominated by Victorian and Edwardian bay-fronted terraces with the classic side return, and Southwark Council routinely approves single-storey rear and side-return extensions under Permitted Development on these houses. It's one of the busiest family-extension markets in south London. We check your street is outside the East Dulwich conservation area and any Dulwich Estate land before relying on PD.
It can. Part of the Dulwich area is managed by the Dulwich Estate scheme of management, which adds a private consent on top of council planning for some properties towards the SE22/SE21 fringe. Most core East Dulwich terraces around Lordship Lane are unaffected. We confirm whether your address carries a Dulwich Estate consent requirement as well as Southwark planning before designing.
The Victorian and Edwardian terraces of East Dulwich SE22 take a rear or L-shaped dormer loft conversion well, often combined with a side-return kitchen extension below for a full family reconfiguration. Larger semi-detached houses can take a hip-to-gable plus dormer. We design to the roof type and confirm whether full planning or a Lawful Development Certificate is the right route.
With East Dulwich property at approx £750k, £1.5m for houses, £725k for flats (Land Registry, 2024), the professional drawing fee is a small fraction of the value the work adds to SE22's victorian and edwardian terraces and bay-fronted villas. Southwark Council charges its own statutory application fee on top (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every SE22 address.
For a SE22 project across East Dulwich, Lordship Lane, Peckham Rye, Dulwich, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Southwark Council (8 weeks for a householder application). We carry the East Dulwich application through every officer query to the decision.
East Dulwich (SE22) sits primarily in Southwark, so applications are decided by Southwark Council. Conservation areas within SE22 include East Dulwich, Dulwich Village fringe, Peckham Rye, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind basement conversion drawings in East Dulwich — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Southwark Council Building Control or an approved inspector. On SE22's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With East Dulwich (SE22) property at approx £750k, £1.5m for houses, £725k for flats (Land Registry, 2024), a well-designed extension or loft typically returns more than it costs in added floor area and sale value. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on SE22 homes.
Local policy varies more between adjoining boroughs than most owners expect. Full service detail for SE5, SE15, SE21 and SE24.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SE22 postcode district we draw in, the stock that dominates it and the authority that validates a basement conversion there. SE22 fees below are the statutory England rates for 2026, not basement conversion estimates.
| Postcode | Area | Dominant stock | What it means for a basement conversion |
|---|---|---|---|
| SE22 | East Dulwich | Victorian and Edwardian terraces | East Dulwich sits wholly inside SE22, so Southwark Council validates every basement conversion submitted from an SE22 address. |
| SE1 | Bermondsey / Borough / Waterloo | Georgian terraces, post-war flats, new-build | Adjoining district to SE22, also inside Southwark for basement conversion purposes. |
| SE5 | Camberwell | Georgian villas, Victorian terraces | Adjoining district to SE22, also inside Southwark for basement conversion purposes. |
| SE15 | Peckham / Nunhead | Victorian terraces, post-war estates | Adjoining district to SE22, also inside Southwark for basement conversion purposes. |
| SE16 | Bermondsey / Rotherhithe | Warehouse conversions, Georgian terraces, new-build | Adjoining district to SE22, also inside Southwark for basement conversion purposes. |
Roof pitch, wall build-up and plot depth change every few SE22 streets, and each one changes what a basement conversion can achieve at that address.
SE22 (East Dulwich) conservation designations: there are 43 across Southwark Council, Camberwell Grove, Bermondsey Street, Dulwich Village among them. Designation costs a SE22 (East Dulwich) owner the permitted-development route: a basement conversion then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Bermondsey Street is the SE22 (East Dulwich) designation that most often changes a basement conversion design.
What Article 4 removes near SE22 (East Dulwich): Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. Before pricing a basement conversion we check whether the SE22 address is inside the mapped area, because Southwark Council draws the SE22 (East Dulwich) boundary street by street rather than across the whole of SE22 (East Dulwich).
What SE22 (East Dulwich) is built from: Georgian and Regency in Bermondsey and Borough; Victorian terraces in Camberwell and Peckham; Dulwich Estate controlled housing; riverside new-build. Dulwich Estate private planning scheme affects much of SE21 and SE22; Southwark planning for rest of borough; strong heritage context. That mix decides the basement conversion route in SE22 (East Dulwich) more than the postcode does, and it is what a Southwark Council case officer reads first. A householder application costs £548 paid to Southwark Council direct, with 8 weeks to a decision once validated.
Sources for this SE22 basement conversion page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
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Local values run approx £750,000–£1.5m for houses, £450,000–£725,000 for flats. Source: Land Registry, 2024.
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