House Extensions · SE24 Herne Hill
Fixed-fee house extension drawings for Herne Hill, Brockwell Park, Poets' Corner, North Dulwich fringe in the SE24 postcode, drawn by an MCIAT-chartered architectural technologist and submitted to Lambeth Council. SE24 spans Lambeth and Southwark; conservation areas around Herne Hill and the Sunray Estate control much of the housing.
MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.
House extensions in Herne Hill are dominated by single-storey rear and side-return additions on SE24's large victorian and edwardian terraces and bay-fronted, with double-storey and wrap-around schemes where the plot allows. Lambeth Council weighs depth, height and neighbour daylight; many extensions across Herne Hill, Brockwell Park, Poets' Corner, North Dulwich fringe are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for large victorian and edwardian terraces and bay-fronted typical of Herne Hill.
Across Herne Hill, Brockwell Park, Poets' Corner, North Dulwich fringe in SE24, the dominant property is large victorian and edwardian terraces and bay-fronted houses around herne hill, with mansion blocks and villas toward brockwell park. That stock shapes what house extension drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Lambeth Council judges each on design quality and neighbour impact. We survey the specific Herne Hill property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE24 streetscape.
Housing stock in SE24: Large Victorian and Edwardian terraces and bay-fronted houses around Herne Hill, with mansion blocks and villas toward Brockwell Park.
Within the district: Herne Hill, Brockwell Park, Poets' Corner, North Dulwich fringe.
Streets we know in SE24: the Poets' Corner streets (Shakespeare Road, Milton Road), Half Moon Lane and the Casino Estate roads. Each road has its own building line, boundary treatment and precedent that Lambeth Council weighs when assessing a house extension drawings scheme.
Conservation areas: Herne Hill, Casino Avenue, Sunray Estate. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE24: Herne Hill rail to Victoria, Blackfriars and London Bridge (Thameslink).
Property values: around £500,000 for a flat and £1m-£1.6m for a house — a useful gauge of the build value an extension or loft adds in SE24.
Borough character: Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions.
Measured existing survey, photographic record, Article 4 and conservation check specific to Herne Hill before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The large Victorian and Edwardian terraces around Poets' Corner and Half Moon Lane suit side-return, rear and loft extensions, much of it within Permitted Development outside the conservation areas, confirmed with a Lawful Development Certificate. We confirm the route and draw to Lambeth's or Southwark's checklist.
SE24 straddles the boundary — Herne Hill and Brockwell Park largely sit in Lambeth, with the eastern edge toward North Dulwich in Southwark. The two councils apply different conservation controls, so we confirm your exact authority before quoting and submit accordingly.
The Sunray Estate is a designated conservation area of early-20th-century cottage-style housing with strong character controls, so extensions there are assessed tightly on form and materials. We design sympathetically and submit a full application with a Heritage Statement where required.
With SE24 houses around £1m-£1.6m and excellent Thameslink links from Herne Hill, a well-designed side-return or loft adds floor area worth well above the build and drawing cost. Our fixed drawing fee keeps the professional cost predictable on these large period houses.
Our fixed fee for house extension drawings in Herne Hill starts at £1,225 — no hourly billing. With Herne Hill property at around £500,000 for a flat and £1m-£1.6m for a house, the professional drawing fee is a small fraction of the value the work adds to SE24's large victorian and edwardian terraces and bay-fronted. Lambeth Council charges its own statutory application fee on top (currently £258 for a householder planning application, £578 for a full application). We quote the drawings as one fixed price and the free site survey covers every SE24 address.
For a SE24 project across Herne Hill, Brockwell Park, Poets' Corner, North Dulwich fringe, 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 Lambeth Council (8 weeks for a householder application). We carry the Herne Hill application through every officer query to the decision.
Herne Hill (SE24) sits primarily in Lambeth, so applications are decided by Lambeth Council. Article 4 in force in the borough: Yes. Conservation areas within SE24 include Herne Hill, Casino Avenue, Sunray Estate, 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 house extension drawings in Herne Hill — 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 Lambeth Council Building Control or an approved inspector. On SE24'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 Herne Hill (SE24) property at around £500,000 for a flat and £1m-£1.6m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value, while our fixed drawing fee from £1,225 keeps the professional cost predictable. 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 SE24 homes.
From £840.
From £840.
From £1,225.
From £1,575.
From £995.
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From £350.
From £540.
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From £1,225.
Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.
Every SE24 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. SE24 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| SE24 | Herne Hill | Victorian villas, Edwardian terraces | A house extension in Herne Hill may land with Lambeth Council or Southwark Council — SE24 crosses the boundary, and the SE24 policies map decides it street by street. |
| SE11 | Kennington / Vauxhall | Georgian terraces, post-war estates | Adjoining district to SE24, also inside Lambeth for house extension purposes. |
| SE27 | West Norwood / Tulse Hill | Victorian terraces, Edwardian villas | Adjoining district to SE24, also inside Lambeth for house extension purposes. |
| SW2 | Brixton Hill / Tulse Hill | Victorian terraces, post-war estates | Adjoining district to SE24, also inside Lambeth for house extension purposes. |
| SE1 | Bermondsey / Borough / Waterloo | Georgian terraces, post-war flats, new-build | Adjoining district to SE24, also inside Southwark for house extension purposes. |
| SE5 | Camberwell | Georgian villas, Victorian terraces | Adjoining district to SE24, also inside Southwark for house extension purposes. |
| SE15 | Peckham / Nunhead | Victorian terraces, post-war estates | Adjoining district to SE24, also inside Southwark for house extension purposes. |
| SE16 | Bermondsey / Rotherhithe | Warehouse conversions, Georgian terraces, new-build | Adjoining district to SE24, also inside Southwark for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few SE24 streets, and each one changes what a house extension can achieve at that address.
Conservation areas covering SE24 (Herne Hill): Lambeth Council runs 64, and Kennington, Brockwell Park, Streatham Hill are the ones SE24 (Herne Hill) owners meet most. A house extension inside a SE24 (Herne Hill) conservation area loses permitted development, so the SE24 (Herne Hill) submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Brockwell Park a house extension is judged on the street elevation first.
What Article 4 removes near SE24 (Herne Hill): Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. Before pricing a house extension we check whether the SE24 address is inside the mapped area, because Lambeth Council draws the SE24 (Herne Hill) boundary street by street rather than across the whole of SE24 (Herne Hill).
SE24 (Herne Hill) housing stock: Victorian terraces in Clapham, Brixton, Herne Hill; Edwardian villas; 1930s and post-war estates in parts of Streatham; Georgian in Kennington. Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions. Read that before choosing a house extension route in SE24 (Herne Hill) — construction, not postcode, sets what is achievable. House extensions in SE24 (Herne Hill) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Lambeth Council submissions.
Conservation areas covering SE24 (Herne Hill): Southwark Council runs 43, and Dulwich Village, Peckham Rye, Borough are the ones SE24 (Herne Hill) owners meet most. A house extension inside a SE24 (Herne Hill) conservation area loses permitted development, so the SE24 (Herne Hill) submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Bermondsey Street a house extension is judged on the street elevation first.
What Article 4 removes near SE24 (Herne Hill): Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. Before pricing a house extension we check whether the SE24 address is inside the mapped area, because Southwark Council draws the SE24 (Herne Hill) boundary street by street rather than across the whole of SE24 (Herne Hill).
SE24 (Herne Hill) housing stock: 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. Read that before choosing a house extension route in SE24 (Herne Hill) — construction, not postcode, sets what is achievable. House extensions in SE24 (Herne Hill) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Southwark Council submissions.
Sources for this SE24 house extension 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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