House Extensions · SE25 South Norwood
Croydon applies householder control across SE25, with conservation pockets around Woodside Green; one of London's most affordable period markets.
If your property sits elsewhere in the borough, the borough-wide page for house extensions in Croydon covers the same service across every ward.
House extensions in South Norwood are dominated by single-storey rear and side-return additions on SE25's victorian and edwardian terraces and bay-fronted semis, with double-storey and wrap-around schemes where the plot allows. Croydon Council weighs depth, height and neighbour daylight; many extensions across South Norwood, Selhurst, Woodside, Norwood Junction 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 victorian and edwardian terraces and bay-fronted semis typical of South Norwood.
Across South Norwood, Selhurst, Woodside, Norwood Junction in SE25, the dominant property is victorian and edwardian terraces and bay-fronted semis around south norwood and selhurst, with post-war estates near the centre. 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 Croydon Council judges each on design quality and neighbour impact. We survey the specific South Norwood property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SE25 streetscape.
Housing stock in SE25: Victorian and Edwardian terraces and bay-fronted semis around South Norwood and Selhurst, with post-war estates near the centre.
Within the district: South Norwood, Selhurst, Woodside, Norwood Junction.
Streets we know in SE25: the South Norwood Hill streets, Portland Road, Oliver Grove and the Woodside terraces. Each road has its own building line, boundary treatment and precedent that Croydon Council weighs when assessing a house extension drawings scheme.
Conservation areas: South Norwood (Lower Norwood), Woodside Green. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SE25: Norwood Junction on the Overground and rail to London Bridge and Victoria, plus the tram at Woodside.
Regeneration: South Norwood falls within or beside the South Norwood / Croydon growth area, which shapes local planning policy and design expectations.
Property values: across Croydon, semi-detached houses had a 2025 median of £545,000 from 870 sales, and detached houses £725,000 from 476. SE25's own median, every type included, was £409,000.
Borough character: Large, mixed-density outer borough; permissive in outer areas; heritage controls in conservation pockets; major regeneration in central Croydon.
Measured existing survey, photographic record, Article 4 and conservation check specific to South Norwood 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 Victorian and Edwardian terraces and bay-fronted semis around Portland Road and South Norwood Hill 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 Croydon's checklist.
Usually yes — a rear dormer or hip-to-gable on the semis, within the volume allowance and confirmed by a Lawful Development Certificate, provided you're not in the Woodside Green conservation area. We check the constraints for your road and draw it for Building Control.
Family-house extensions and lofts on the Victorian and Edwardian terraces and semis around Selhurst and Woodside — side-returns, rear additions and dormers as families grow. With houses around £450,000-£700,000, SE25 offers strong value, and a council-ready scheme protects both approval and resale.
Croydon's wider regeneration and the tram and Overground links keep SE25 well-connected and improving, supporting values. For a house project the binding controls remain Permitted Development limits and the local conservation area, which we check for your address before quoting.
Croydon 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 SE25 address.
For a SE25 project across South Norwood, Selhurst, Woodside, Norwood Junction, 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 Croydon Council (8 weeks for a householder application). We carry the South Norwood application through every officer query to the decision.
South Norwood (SE25) sits primarily in Croydon, so applications are decided by Croydon Council. Conservation areas within SE25 include South Norwood (Lower Norwood), Woodside Green, 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 South Norwood — 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 Croydon Council Building Control or an approved inspector. On SE25'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 SE25 homes.
Extensions on a boundary plot can involve two authorities. Everything we draw and submit is listed for SE19, SE20 and SW16.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SE25 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. SE25 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| SE25 | South Norwood / Selhurst | Victorian terraces | A house extension at an SE25 address in South Norwood / Selhurst is determined by Croydon Council under its own Local Plan policies for South Norwood / Selhurst. |
| SE25 | South Norwood | Victorian terraces | South Norwood sits inside SE25; house extension proposals here are determined by Croydon Council. |
| SE25 | Selhurst | Edwardian terraces | Selhurst sits inside SE25; house extension proposals here are determined by Croydon Council. |
| SE19 | Upper Norwood / Crystal Palace | Victorian villas, Edwardian terraces | Adjoining district to SE25, also inside Croydon for house extension purposes. |
| CR0 | Croydon / Addiscombe / Shirley | Edwardian terraces, post-war flats | Adjoining district to SE25, also inside Croydon for house extension purposes. |
| CR2 | South Croydon | mixed stock | Adjoining district to SE25, also inside Croydon for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few SE25 streets, and each one changes what a house extension can achieve at that address.
Conservation areas covering SE25 (South Norwood / Selhurst): Croydon Council runs 24, and South Norwood, Crystal Palace, Old Coulsdon are the ones SE25 (South Norwood / Selhurst) owners meet most. A house extension inside a SE25 (South Norwood / Selhurst) conservation area loses permitted development, so the SE25 (South Norwood / Selhurst) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Purley a house extension is judged on the street elevation first.
Article 4 and your SE25 (South Norwood / Selhurst) house extension: Croydon Council has made no borough-wide direction, so permitted development for a house extension in SE25 (South Norwood / Selhurst) generally survives outside SE25 (South Norwood / Selhurst) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE25 owner records that a house extension was lawful.
The building fabric around SE25 (South Norwood / Selhurst): Victorian villas in Upper Norwood and Crystal Palace; Edwardian terraces in Thornton Heath and Selhurst; 1930s semi-detached in Purley and Coulsdon; post-war in Croydon central. Large, mixed-density outer borough; permissive in outer areas; heritage controls in conservation pockets; major regeneration in central Croydon. A house extension in SE25 (South Norwood / Selhurst) 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 Croydon Council.
Sources for this SE25 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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