Planning Drawings · SE26 Sydenham
Lewisham controls the Sydenham Hill and Westwood Park conservation areas; the hillside villas and terraces are a strong, well-priced extension market.
This page covers one part of the borough. For the full picture — fees, timelines and the council's current position — read planning drawings in Lewisham.
Planning drawings for Sydenham start by establishing whether your scheme is Permitted Development, needs a Lawful Development Certificate, or full planning from Lewisham Council. On SE26's victorian and edwardian terraces and villas on, the recurring questions are roof additions, rear and side-return extensions, and alterations within Sydenham Hill / Kirkdale, Westwood Park, Sydenham Park. We draw existing and proposed plans, elevations and a site location plan to the council's validation checklist for Sydenham, Upper Sydenham, Lower Sydenham, Crystal Palace fringe.
Across Sydenham, Upper Sydenham, Lower Sydenham, Crystal Palace fringe in SE26, the dominant property is victorian and edwardian terraces and villas on the sydenham slopes, with inter-war semis and post-war estates toward lower sydenham. That stock shapes what planning permission drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Lewisham Council judges each on design quality and neighbour impact. We survey the specific Sydenham property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE26 streetscape.
Housing stock in SE26: Victorian and Edwardian terraces and villas on the Sydenham slopes, with inter-war semis and post-war estates toward Lower Sydenham.
Within the district: Sydenham, Upper Sydenham, Lower Sydenham, Crystal Palace fringe.
Streets we know in SE26: the Sydenham Hill villas, Kirkdale, Wells Park Road and the Cobb's Corner streets. Each road has its own building line, boundary treatment and precedent that Lewisham Council weighs when assessing a planning permission drawings scheme.
Conservation areas: Sydenham Hill / Kirkdale, Westwood Park, Sydenham Park. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE26: Sydenham on the Overground and Lower Sydenham and Sydenham Hill rail to London Bridge and Victoria.
Property values: Lewisham as a whole returned a £470,000 median from 3,101 sales in 2025, a shade above the £451,000 that SE26 itself recorded over 385.
Borough character: Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD.
A chartered technologist visits and laser-measures every room. Typically 60–90 minutes on site.
Drafted in Revit or AutoCAD at 1:100 or 1:50. Fully annotated and council-ready.
Unlimited revisions until you approve. Shadow studies for committee-sensitive applications.
Site location plan, block plan, Design & Access Statement where required.
We lodge the application with Lewisham Council and pay statutory fees directly.
Every officer query, consultation response and amendment handled through to determination.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Victorian and Edwardian terraces and villas around Kirkdale and Wells Park Road 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 Lewisham's checklist.
Yes. The Sydenham Hill, Westwood Park and Sydenham Park conservation areas protect the large hillside villas, so external changes there need full planning with a Heritage Statement. We design sympathetically to the period detailing and submit to Lewisham, carrying the application through officer queries.
Usually yes outside the conservation areas — a rear dormer or hip-to-gable within the volume allowance, confirmed by a Lawful Development Certificate. The steep Sydenham slopes sometimes affect roof design and overlooking, which we assess. Inside the designations, roof changes need full planning.
With SE26 houses around £600,000-£900,000, Sydenham offers strong south-London value, and a side-return or loft adds family space worth comfortably above the build and drawing cost. The Overground link to Shoreditch and Highbury keeps demand steady.
Lewisham Council charges its own statutory application fee (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 SE26 address.
For a SE26 project across Sydenham, Upper Sydenham, Lower Sydenham, Crystal Palace 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 Lewisham Council (8 weeks for a householder application). We carry the Sydenham application through every officer query to the decision.
Sydenham (SE26) sits primarily in Lewisham, so applications are decided by Lewisham Council. Conservation areas within SE26 include Sydenham Hill / Kirkdale, Westwood Park, Sydenham Park, 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 planning permission drawings in Sydenham — 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 Lewisham Council Building Control or an approved inspector. On SE26'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. 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 SE26 homes.
Working across a borough boundary, or unsure which council will decide your application? Every service we offer is listed for SE3, SE4, SE6, SE12, SE13 and SE23.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SE26 postcode district we draw in, the stock that dominates it and the authority that validates a planning drawing set there. SE26 fees below are the statutory England rates for 2026, not planning drawing set estimates.
| Postcode | Area | Dominant stock | What it means for a planning drawing set |
|---|---|---|---|
| SE26 | Sydenham | Victorian villas, Edwardian terraces | A planning drawing set in Sydenham may land with Lewisham Council or Bromley Council — SE26 crosses the boundary, and the SE26 policies map decides it street by street. |
| SE4 | Brockley | Victorian and Edwardian terraces | Adjoining district to SE26, also inside Lewisham for planning drawing set purposes. |
| SE6 | Catford / Bellingham | 1930s semi-detached, post-war flats | Adjoining district to SE26, also inside Lewisham for planning drawing set purposes. |
| SE8 | Deptford | Georgian terraces, post-war estates, new-build | Adjoining district to SE26, also inside Lewisham for planning drawing set purposes. |
| SE12 | Lee / Grove Park | mixed stock | Adjoining district to SE26, also inside Lewisham for planning drawing set purposes. |
| SE20 | Anerley / Penge | Victorian and Edwardian terraces | Adjoining district to SE26, also inside Bromley for planning drawing set purposes. |
| BR1 | Bromley / Bickley | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE26, also inside Bromley for planning drawing set purposes. |
| BR2 | Hayes / Keston | Victorian terraces, Edwardian villas, post-war flats | Adjoining district to SE26, also inside Bromley for planning drawing set purposes. |
| BR3 | Beckenham | Edwardian villas, 1930s semi-detached | Adjoining district to SE26, also inside Bromley for planning drawing set purposes. |
Roof pitch, wall build-up and plot depth change every few SE26 streets, and each one changes what a planning drawing set can achieve at that address.
Conservation areas covering SE26 (Sydenham): Lewisham Council runs 30, and Blackheath, Deptford High Street, Forest Hill are the ones SE26 (Sydenham) owners meet most. A planning drawing set inside a SE26 (Sydenham) conservation area loses permitted development, so the SE26 (Sydenham) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Blackheath a planning drawing set is judged on the street elevation first.
Article 4 and your SE26 (Sydenham) planning drawing set: Lewisham Council has made no borough-wide direction, so permitted development for a planning drawing set in SE26 (Sydenham) generally survives outside SE26 (Sydenham) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE26 owner records that a planning drawing set was lawful.
The building fabric around SE26 (Sydenham): Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill; 1930s semi-detached in Catford and Hither Green; post-war mixed in Deptford. Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD. A planning drawing set in SE26 (Sydenham) 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 Lewisham Council.
Conservation areas covering SE26 (Sydenham): Bromley Council runs 48, and Bromley Town, Chislehurst, Beckenham are the ones SE26 (Sydenham) owners meet most. A planning drawing set inside a SE26 (Sydenham) conservation area loses permitted development, so the SE26 (Sydenham) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Bromley Town a planning drawing set is judged on the street elevation first.
Article 4 and your SE26 (Sydenham) planning drawing set: Bromley Council has made no borough-wide direction, so permitted development for a planning drawing set in SE26 (Sydenham) generally survives outside SE26 (Sydenham) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE26 owner records that a planning drawing set was lawful.
The building fabric around SE26 (Sydenham): Large 1930s detached and semi-detached in Chislehurst and Bickley; Edwardian in Beckenham; Victorian in Bromley town; Metropolitan Green Belt covers significant rural-fringe land. Largest London borough by area; substantial Green Belt; conservation areas in most town centres; generally permissive elsewhere. A planning drawing set in SE26 (Sydenham) 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 Bromley Council.
Sources for this SE26 planning drawing set 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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