A single-storey rear extension with bi-fold doors opening onto a small London garden

SE25 · South Norwood · Croydon

Planning and building regulation drawings in South Norwood (SE25)

South Norwood is a Victorian terrace district built around its high street, and that era shows in almost everything a homeowner here wants to change. Portland Road, Selhurst Road and Enmore Road sit among the streets that make up that Victorian core. Croydon Council pays close attention to what happens at roof and elevation level here: a dormer on one house changes the read of the whole terrace, so applications get assessed against the neighbours either side, not in isolation.

MCIAT chartered technologists
Croydon Council granted 87% of 805 householder applications
Drawings in about 7 days

The area sits close to South Norwood Lake, and the housing thins out into later interwar and post-war streets toward Selhurst and Woodside, where plots and house forms are a bit less uniform. Anyone extending near Selhurst Park should also factor in event days: parking and access around the stadium get tighter on match days, which matters for skip deliveries, scaffolding lifts and anything else that needs a van outside the house for a stretch. None of that changes what's achievable, a rear extension, a loft conversion, a side infill, but it does change how a build gets sequenced. We draw for the terrace form South Norwood actually has: narrow plans, shared party walls, and rooflines that need to sit comfortably next to next door's, not fight it.

Planning in South Norwood: what to know before you apply

South Norwood's conservation area is the main thing shaping what a householder application needs to show here. Frontages and rooflines in the historic centre around the high street get closely assessed, so a rear dormer or a change to a front elevation needs to demonstrate it keeps faith with the terrace rather than standing out from it. Permitted development rights are narrower inside the conservation area than they would be a few streets over in the later, post-war parts of South Norwood, so the first question on any project here is whether the site sits inside the boundary. Croydon separately withdraws permitted development rights for two other moves, each limited to a specific area: turning a house into an HMO in designated wards, and switching an office building over to residential use in parts of the town centre. Whether either restriction lands on a specific South Norwood address depends on the ward and the building's current use, so it's worth confirming early rather than assuming. We check the conservation area boundary and the relevant designations before drawing anything, so the application is built around what the site can actually do.

Applications are decided by Croydon Council — its planning pages.

Check your route

Does your South Norwood project need planning permission?

Route check · South Norwood (SE25)

ProjectProperty

Listed building?

Conservation area?

Likely permitted development — no planning applicationNeeds checking

A single-storey rear extension up to 4 m deep on a detached house, or 3 m on any other house, is Class A permitted development subject to the height and materials conditions.
An Article 4 direction applies here and may withdraw this freedom — the schedule must be checked before relying on it.
One or more constraints are unknown — we check the council's registers as part of the free appraisal.
Where permitted development applies, a lawful development certificate proves it for lenders and buyers.

Sources: GPDO 2015, Schedule 2, Part 1 · Planning Portal — common projects · Building Regulations 2010 — when approval is needed

This is a first-pass indication from the national rules, not planning advice for your property. Your council's registers, any Article 4 schedule and the exact dimensions decide it — the free appraisal checks all three before we recommend a route.

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South Norwood (SE25) in numbers

What Croydon Council has decided, and what SE25 is built of — the two facts that shape every job here.

Householder planning decisions — Croydon Council

South Norwood (SE25) applications are decided by Croydon Council; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1	805
Granted	703
Refused	102
Grantedof 805 decisions · England 90%	87%
Decided within 8 weeksof 530, excluding prior approvals	95%

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Permitted development prior approvals — Croydon Council

How the larger-home-extension route has fared with Croydon Council, which decides SE25 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1	155
Prior approval granted	143
Prior approval refused	56
Grantedof 199 determined	72%

Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Planning appeals — Croydon Council

Refusals in SE25 can be appealed to the Planning Inspectorate; this is Croydon Council's householder appeal record.

Householder appeals determined2021–2026	289
Allowed	115
Allowedof 289 · England 36%	40%

Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.

Conservation areas and Article 4 directions — Croydon Council

Register counts for Croydon Council. A count describes what the council has published, never a rank against another council.

Conservation areas in the register9 dated, 2006–2008	20

Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.

What SE25 is built of

Residential building form across South Norwood (SE25), from 419 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side	56%
Attached on one side	38%
Detached	5%
Median building footprint	60 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate	1.83
Buildings classified	419

Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-09-22.

Day 0Measured survey of your South Norwood property — or your existing plans if you have them.
About 7 daysDrawings issued for your approval. Free redraws until you are happy.
SubmissionWe validate against Croydon Council’s checklist and submit on your behalf.
Council: 8-week targetHouseholder applications carry an 8-week statutory target. Croydon Council decided 95% of 530 recent householder applications inside it.

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Neighbourhoods

Streets and neighbourhoods in SE25

South Norwoodpredominantly Victorian

Nearby

Nearby postcode districts

Herne Hill SE24Sydenham SE26Forest Hill SE23West Norwood SE27East Dulwich SE22Bermondsey SE1Dulwich SE21Blackheath SE3

FAQ

South Norwood (SE25) — FAQs

Can I put a dormer on my South Norwood terrace?+

Often yes, but because the streets around the high street sit inside the South Norwood conservation area, a dormer there gets checked against the roofline and frontage character of the terrace, not just building regulations. Outside the conservation area, toward Selhurst and Woodside, there's usually more room to work with. Either way, the design needs to sit comfortably next to the neighbouring roofs rather than reading as an isolated addition.

Does building near Selhurst Park cause problems for construction?+

It doesn't stop a project, but it's worth planning around. Access and on-street parking near the stadium tighten on match days, so scaffolding deliveries, skip placement and contractor parking work better when they're scheduled away from fixture dates. We factor that into the build sequence rather than leaving it to the contractor to discover on the day.

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