House Extensions in South London: Peckham, Camberwell, Nunhead and Dulwich
South London has changed considerably over the past two decades. Streets that were once overlooked have become some of the most sought-after addresses in the city, and the Victorian and Edwardian terrace housing that defines much of Peckham, Camberwell, Nunhead and Dulwich is now the subject of serious architectural ambition. We have completed a number of projects in these areas — extensions, loft conversions, and full house renovations — and the quality of design thinking we encounter from clients here is consistently high.
This guide is for homeowners in these neighbourhoods who are thinking about extending and want to understand the planning framework before beginning the design conversation.
The planning context
Extensions in Peckham, Camberwell, Nunhead and Dulwich fall under the jurisdiction of the London Borough of Southwark, one of London's most active planning authorities for residential work. Southwark has a detailed set of residential design standards — the Residential Design Standards Supplementary Planning Document — which sets out the borough's expectations for extensions, alterations and new dwellings. These standards sit alongside the Southwark Plan and the London Plan as material considerations in every planning decision.
Southwark has numerous conservation areas across these neighbourhoods. Camberwell Grove, The Gardens Estate, and parts of Peckham Rye are among the most significant in the northern part of the borough, but there are a number of smaller designations covering individual streets and groups of buildings throughout the area. If you are unsure whether your property sits within a conservation area boundary, Southwark's planning portal has an interactive map that can confirm this within moments.
Conservation areas in Peckham and Camberwell
Southwark's conservation area appraisals for the Peckham and Camberwell designations describe a consistent set of design values that apply to extension proposals in these areas. The terraced housing stock here is predominantly late Victorian and Edwardian, built in yellow London stock brick with slate roofs, timber sash windows, and — in the better streets — original corbelled brickwork details to the eaves and chimney stacks. The conservation area guidance calls for extensions that are sympathetic to this fabric: matching or complementary brick, natural or artificial slate roofing, and window proportions that respond to the original building.
Where contemporary design approaches are proposed — dark-stained timber cladding, standing seam zinc, or steel-framed glazing — they tend to fare better when the transition between old and new is handled honestly, with a visible break between the original building and the addition, rather than an attempt to blend the two. Southwark conservation officers are, in our experience, generally supportive of well-designed contemporary additions that make a clear architectural argument for their approach.
Dulwich Village and the Dulwich conservation areas
Dulwich Village is among Southwark's most architecturally distinctive conservation areas — characterised by unusually generous plot sizes, a mature tree canopy, and a mixture of Georgian and Victorian housing stock that gives it a character quite different from the denser terraced streets further north in the borough. Extensions here are assessed with particular attention to scale and the relationship between the building and its garden. The openness of the plots is itself a protected characteristic — an extension that over-develops the site, or that reduces the sense of space and greenery that defines the area, will struggle regardless of its architectural quality.
The Dulwich Village conservation area appraisal is one of Southwark's more detailed documents and is worth reading carefully before any design work begins. It identifies specific views, groups of buildings, and landscape features that are considered of particular significance — and applications that demonstrate an understanding of these are received considerably more positively than those that do not.
Working on terraced housing stock
The typical house in Peckham or Camberwell is a two or three-storey Victorian or Edwardian terrace, often in a mid-terrace position, with a back addition already present and a long, relatively narrow rear garden. The standard extension scenarios in these houses are well-established: infilling the side return at ground floor to create a full-width kitchen and dining space; extending into the rear garden at single storey; combining a rear extension with a loft conversion to create additional bedroom accommodation above; or a wraparound addition that does all of this at once.
Each of these scenarios has its own planning sensitivities, and each requires careful consideration of how the new volume relates to the original building and to the neighbours on either side. Southwark is attentive to the impact of extensions on neighbouring daylight and outlook — the BRE daylight and sunlight methodology is applied rigorously, and proposals that cast significant shadow over adjacent gardens or reduce the outlook from neighbouring windows are routinely refused or conditioned.
The side return extension deserves particular thought. A full-width glazed roof over the extended ground floor plan is a popular choice, but in conservation areas it requires a considered approach to the rooflight design — visible rooflights on rear elevations are generally acceptable, but the extent, material and detailing of the glazing is scrutinised. Loft conversions are equally common in these streets — typically rear dormers or flat-to-slope rooflights on the rear pitch — and follow the same conservation area logic: rear-facing alterations are more straightforwardly approved than front-facing ones.
What we have done in these neighbourhoods
We have completed a rear extension and full house renovation on a terraced house in Peckham — a project that involved a full-width Crittall-style extension in black brick, with pale oak floors and marble-and-brass detailing throughout the interior. In Nunhead, we completed a full renovation and rear extension with a bespoke multi-use garden structure that gave the project its name. Both projects involved detailed engagement with Southwark's planning team and required a clear and well-evidenced design argument to achieve consent.
In our experience, the projects that proceed most smoothly in Southwark are those where the planning strategy is resolved before the design is fixed — where the team understands the conservation area character, the recent decision record, and the specific sensitivities of the site before committing to a design direction.
For a broader overview of how conservation area policy works across London, our guide to extending in a London conservation area covers the framework that applies borough-wide.
If you are considering an extension in Peckham, Camberwell, Nunhead, Dulwich or anywhere else in South London, we would welcome the conversation. Get in touch.