Every loft type across every Southwark roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regulations, structural calculations and party wall notices, all fixed price.
Southwark’s Datahub set records 2,098 rear dormer applications at 90% approved — the highest dormer rate of any London borough in the set — alongside 679 mansards at 72%. The council approved 93.8% of householder applications overall, refusing only 100 of 1,617.
| Measure | Southwark | Outcome |
|---|---|---|
| Rear dormer applications in the Datahub | 2,098 | 90% approved |
| Loft conversion applications in the Datahub | 423 | 86% approved |
| Mansard roof applications in the Datahub | 679 | 72% approved |
| Householder decisions | 1,617 | 93.8% approved |
| Conservation areas | 56 | 782 hectares |
| Householder appeals decided | 155 | 29.0% allowed, median 84 days |
Sources: rows one to three from the Planning London Datahub, retrieved 15 August 2026 — phrase-matched application descriptions, a floor rather than a register, and comparable within Southwark only. Row four from MHCLG PS1 and PS2, twelve quarters to March 2026. Row five from planning.data.gov.uk, retrieved 1 September 2026. Row six from Planning Inspectorate casework decided 2016–2026, where Southwark’s 29.0% allowed rate is among London’s lowest — a refusal here is harder to overturn.
Loft conversion drawings in Southwark, a borough of Georgian and Regency in Bermondsey and Borough; Victorian terraces in Camberwell and Peckham; Dulwich Estate controlled housing; riverside new-build, are the full measured-survey-to-submission drawing set London Borough of Southwark needs in order to determine an application: existing and proposed plans, elevations and sections at 1:100 and 1:50, a location and site plan, and the supporting statements the case officer asks for.
Prepared and reviewed by the chartered technologist team at Architectural Drawings London — MCIAT chartered, £2m PI insured.Last reviewed 2026-08-03.
Every loft type across every Southwark roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regulations, structural calculations and party wall notices, all fixed price.
Housing stock in Southwark: Georgian and Regency in Bermondsey and Borough; Victorian terraces in Camberwell and Peckham; Dulwich Estate controlled housing; riverside new-build.
Character: Dulwich Estate private planning scheme affects much of SE21 and SE22; Southwark planning for rest of borough; strong heritage context.
Article 4: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle.
We confirm before quoting whether your Southwark loft has the head height and structural capacity.
Most Southwark loft conversions qualify for a Lawful Development Certificate. We check Article 4 and conservation constraints first.
Option studies including massing, internal layout and roof geometry.
Staircase Part K compliance, Part B fire escape, Part L insulation, Part E acoustic separation.
Ridge beam, purlins, steelwork, floor joist upgrade, dormer framing — chartered engineer sign-off.
Almost every Southwark loft triggers Party Wall notices. We draft notices and coordinate with surveyors.
Single planning or regs submission.
Planning + building regs + structural.
Listed, conservation, complex sites.
Move the controls for an indicative figure. It anchors your budget — it is not a quote. Every project is priced after a free survey.
Build costs are separate and quoted by your contractor. See our published fees.
Every Southwark postcode district we draw in, the stock that dominates it and the authority that validates a loft conversion there. Southwark fees below are the statutory England rates for 2026, not loft conversion estimates.
| Postcode | Area | Dominant stock | What it means for a loft conversion |
|---|---|---|---|
| SE1 | Bermondsey / Borough / Waterloo | Georgian terraces, post-war flats, new-build | A loft conversion in Bermondsey / Borough / Waterloo may land with Southwark Council or Lambeth Council — SE1 crosses the boundary, and the SE1 policies map decides it street by street. |
| SE5 | Camberwell | Georgian villas, Victorian terraces | A loft conversion in Camberwell may land with Southwark Council or Lambeth Council — SE5 crosses the boundary, and the SE5 policies map decides it street by street. |
| SE15 | Peckham / Nunhead | Victorian terraces, post-war estates | SE15 covers Peckham / Nunhead only; Southwark Council handles the loft conversion, and Peckham / Nunhead case officers apply the SE15 conservation-area map. |
| SE16 | Bermondsey / Rotherhithe | Warehouse conversions, Georgian terraces, new-build | A loft conversion at an SE16 address in Bermondsey / Rotherhithe is determined by Southwark Council under its own Local Plan policies for Bermondsey / Rotherhithe. |
| SE17 | Walworth | Post-war estates, new-build towers | SE17 covers Walworth only; Southwark Council handles the loft conversion, and Walworth case officers apply the SE17 conservation-area map. |
| SE21 | Dulwich Village | Georgian villas, Edwardian villas (Dulwich Estate) | A loft conversion in Dulwich Village may land with Southwark Council or Lambeth Council — SE21 crosses the boundary, and the SE21 policies map decides it street by street. |
| SE22 | East Dulwich | Victorian and Edwardian terraces | SE22 covers East Dulwich only; Southwark Council handles the loft conversion, and East Dulwich case officers apply the SE22 conservation-area map. |
| SE24 | Herne Hill | Victorian villas, Edwardian terraces | SE24 straddles a boundary: Herne Hill addresses fall to Lambeth Council or Southwark Council, so confirm which authority validates the loft conversion before submitting SE24 drawings. |
Roof pitch, wall build-up and plot depth change every few Southwark streets, and each one changes what a loft conversion can achieve at that address.
Conservation areas covering Southwark: Southwark Council runs 43, and Peckham Rye, Borough, Camberwell Grove are the ones Southwark owners meet most. A loft conversion inside a Southwark conservation area loses permitted development, so the Southwark submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Borough a loft conversion is judged on the street elevation first.
What Article 4 removes near Southwark: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. Before pricing a loft conversion we check whether the SE1 address is inside the mapped area, because Southwark Council draws the Southwark boundary street by street rather than across the whole of Southwark.
The building fabric around Southwark: 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. A loft conversion in Southwark is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Southwark Council.
Sources for this Southwark loft 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.
Direct answers to the questions Southwark homeowners ask every week about loft conversion drawings.
Start a free quote →It depends on your exact address in Southwark. Most standard loft conversions qualify as Permitted Development (no planning permission needed) if under 40m³ for terraced or 50m³ for semi-detached, with matching materials and 20cm eaves setback. However Southwark has Article 4 Directions that may remove these rights — and flats, conservation areas and listed buildings always require full planning. We confirm permitted development eligibility at the free feasibility visit.
Two costs matter for a Southwark loft: our architectural package (planning route, building regulations and structural calculations, quoted as one fixed figure) and the builder's construction cost, which varies with loft type — a standard dormer is materially cheaper to build than a mansard. We quote the design fee up front; see our fees.
Very often yes in Southwark. Rear mansards are routinely approved by Southwark Council where the design matches the terrace — including within conservation areas like Camberwell Grove. A Heritage Statement and sensitive design following the borough's published guidance are essential for conservation area mansards.
2.3m measured from existing ceiling joist to existing ridge is the practical minimum for a standard conversion in Southwark. Below 2.2m usually requires dropping the ceiling below (reducing rooms on the floor beneath) or redesigning as a mansard.
Most Southwark loft conversions trigger Party Wall Act notices — legal notices to all adjoining owners. Rear dormers can also prompt right-to-light considerations in dense terraced streets, particularly in Camberwell Grove. We handle both processes.
Southwark's georgian and Regency in Bermondsey and Borough stock lends itself to rear dormers (most common), hip-to-gable (semi-detached), and mansard (period terraces and conservation contexts). Velux-only conversions are possible where ridge height allows. We recommend the best structural and planning route at survey.
We cover all Southwark postcodes — SE1, SE5, SE15, SE16, SE17, SE21, SE22 — with surveyors based locally. Survey appointments within 3 working days. Our structural engineer is London-based and attends site when required.
Most Southwark loft conversions require Party Wall notices to adjoining neighbours — typically for steel beam installation and/or raising the party wall. We can co-ordinate the notice process; our in-house engineer handles the structural element. The Act gives neighbours 14 days to respond.
If your property sits on a boundary, here are the neighbouring options.
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