Southwark · Peckham · East Dulwich · Camberwell · Walworth · Dulwich
Dormer, L-shaped, hip-to-gable and mansard loft conversions for Southwark's Victorian terraces. We check conservation area rules and handle party wall and Building Regulations.
A loft conversion in Southwark typically costs £45,000–£80,000 for a dormer in 2026 and takes 6–14 weeks on site. Outside conservation areas most rear dormers are Permitted Development. Dulwich Village, Camberwell Grove and other conservation areas need planning permission.
Last updated 3 October 2026
Southwark's loft conversion market is built on Victorian and Edwardian terraces in Peckham, East Dulwich, Herne Hill and Walworth, with older Georgian and early Victorian houses in Borough and Bermondsey. Most of the terraces have roof voids that suit dormer conversions well.
Conservation areas are the main variable. Dulwich Village is the strictest in the borough, and Camberwell Grove is another sensitive area. We confirm your address's status first, then tell you which loft type is realistic and which planning route applies.
Southwark has several conservation areas, and each has its own character. Where your house sits changes the planning route:
Our Southwark planning guide covers the borough's conservation areas in detail.
On Peckham, East Dulwich and Walworth terraces, a rear dormer is the standard choice, and an L-shaped dormer suits terraces with a rear outrigger. Check the 40 m³ volume limit before you design anything large.
On Georgian and early Victorian houses in Borough and Bermondsey, a mansard is often the form that planners prefer, but it needs a full planning application and careful design.
Indicative 2026 ranges for Southwark houses. A free survey gives you an accurate, itemised figure for your roof.
Peckham, East Dulwich and Walworth terraces mainly suit dormers. Georgian and early Victorian houses in Borough and Bermondsey are the main mansard market and need planning permission.
Want a personalised range first? Try our free Loft Conversion Cost Calculator.
We measure your roof void, check headroom and confirm whether your house is in a conservation area such as Dulwich Village or Camberwell Grove, or is listed.
Drawings and structural calculations, then a Certificate of Lawfulness, a householder application to Southwark Council or straight to Building Regulations.
Scaffold licence and skip permits applied for, party wall notices served at least two months ahead, and Building Control inspections handled throughout.
A rear dormer typically takes 6–12 weeks on site under a written JCT contract with staged payments, finishing with a snagging walkthrough.
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It depends on your address. Outside conservation areas, most rear dormers and rooflight conversions on houses are Permitted Development within 40 m³ (terraces) or 50 m³ (semi-detached). Dulwich Village, Camberwell Grove and other conservation areas need a planning application, listed buildings need listed building consent, and flats need permission. Mansards almost always need planning permission.
Possibly. Dulwich Village is a conservation area, so planning permission is required, and parts of Dulwich are covered by the Dulwich Estate's scheme of management, which can require the estate's consent for alterations. Check your title and the estate's boundary before you commission drawings.
A rear dormer on a Victorian terrace in Peckham, East Dulwich or Walworth typically costs £45,000–£70,000 in 2026, and an L-shaped dormer £60,000–£80,000 where there is a rear outrigger. Heritage-sensitive schemes in Dulwich or Camberwell Grove carry extra design and planning cost.
Often a mansard is the form planners prefer on older terraces, but it needs a full planning application, and listed buildings also need listed building consent. Check whether your house is listed or in a conservation area first, and expect close scrutiny of materials and proportions.
Terraced streets usually mean scaffolding over the pavement, which normally needs a council licence, and skips on the highway need a permit. Party wall notices go to adjoining owners at least two months before structural work starts. We apply for permits and serve notices as part of the programme.
Cost figures are indicative 2026 London ranges for planning purposes, build cost only and excluding VAT, professional fees and fittings. They are not a quotation. Planning and Permitted Development rules depend on your specific address, so always confirm with your local council or a Certificate of Lawfulness.
Free survey, straight advice, no pressure. If a loft conversion is not right for your house, we will tell you.
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