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Free 2026 London Planning Report — Carshalton SM5

Open-plan kitchen with oak cabinets, a white stone island with four wooden stools, three black pendant lights and an open staircase on the left
SM5 · Carshalton · Sutton

Planning and building regulation drawings in Carshalton (SM5)

Carshalton grew outward from a village that still has its ponds. The oldest buildings are timber-framed and weatherboarded cottages and brick houses around the ponds and the High Street, with early-nineteenth-century houses such as Stone Court among them. Further out, Victorian and Edwardian terraces and villas spread from the historic centre. West Street, Pound Street, The Square, Talbot Road and Mill Lane are among the district's streets, and whether a particular house sits inside a conservation area is a question for the individual address, not the street name.

  • MCIAT chartered technologists
  • London Borough of Sutton granted 93% of 635 householder applications
  • Drawings in about 7 days

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For a Victorian or Edwardian house, a rear extension, a loft conversion or a side addition where there is room each has to be checked against the conservation areas and directions set out below. The village core is a different proposition. It is dense, old and listed in places, with All Saints Church, Honeywood and the Water Tower nearby, so anything new has to respect that historic grain.

Carshalton has several layers of control to work through. The Carshalton Village conservation area protects the setting of the ponds and the buildings around the High Street, with materials and shopfronts watched closely. Carshalton Park and Park Hill add controls to the Victorian villa streets south and east of the village, and Wrythe Green is a conservation area too. Two further directions are reported for Carshalton, an older one on certain roof alterations and one on small HMO conversions, but their current status is not confirmed, so we check with the council whether either affects your house.

Before we draw, we check which of these apply to your house, since a loft that is routine on one road can be an application on the next.

Planning in Carshalton: what to know before you apply

Sutton expects householder work to respect the setting, the materials and the line of the street, and in the Carshalton Village conservation area it controls materials and shopfronts around the ponds, the High Street and The Square. In any conservation area, roof enlargements, side extensions and rear extensions of more than one storey are not permitted development, and listed buildings need listed building consent for changes. If the reported roof-alteration direction applies to a house, a dormer or a change to the roof form can need a full application even outside the conservation areas, and if the reported HMO direction applies, letting to three to six unrelated sharers needs permission. We confirm both with the council, and prepare scaled plans, a location plan and the correct ownership certificate or notice for each submission.

Applications are decided by London Borough of Sutton — its planning pages.

Check your route

Does your Carshalton project need planning permission?

Route check · Carshalton (SM5)

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.
  • This council does not publish its Article 4 directions to the national register, so the schedule is confirmed with the council first.
  • 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.

Confirm it with a free appraisal

Carshalton (SM5) in numbers

What London Borough of Sutton has decided, and what SM5 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Sutton

Carshalton (SM5) applications are decided by London Borough of Sutton; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1635
Granted589
Refused46
Grantedof 635 decisions · England 90%93%
Decided within 8 weeksof 596, excluding prior approvals97%

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 — London Borough of Sutton

How the larger-home-extension route has fared with London Borough of Sutton, which decides SM5 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1188
Prior approval granted26
Prior approval refused73
Grantedof 99 determined26%

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

Planning appeals — London Borough of Sutton

Refusals in SM5 can be appealed to the Planning Inspectorate; this is London Borough of Sutton's householder appeal record.

Householder appeals determined2021–2026148
Allowed61
Allowedof 148 · England 36%41%

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

Conservation areas and Article 4 directions — London Borough of Sutton

Register counts for London Borough of Sutton. A count describes what the council has published, never a rank against another council.

Conservation areas in the register15

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

What SM5 is built of

Residential building form across Carshalton (SM5), from 352 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side45%
Attached on one side43%
Detached12%
Median building footprint59 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate1.17
Buildings classified352

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.

  1. Day 0Measured survey of your Carshalton property — or your existing plans if you have them.
  2. About 7 daysDrawings issued for your approval. Free redraws until you are happy.
  3. SubmissionWe validate against London Borough of Sutton’s checklist and submit on your behalf.
  4. Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Sutton decided 97% of 596 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 SM5

Carshaltonpredominantly Victorian, with a medieval-to-Georgian village core
Nearby

Nearby postcode districts

Morden SM4Wallington SM6Cheam SM3Sutton SM1Belmont SM2
FAQ

Carshalton (SM5) — FAQs

Can I add a loft dormer to a house in Carshalton?+
It depends on the address. In a conservation area a dormer is a roof enlargement that is not permitted development, and an older direction on certain roof alterations is reported for Carshalton, so some houses outside the conservation areas may need an application too. We check the direction and the conservation boundary first, then draw to the route that applies.
Does living near the ponds mean extra restrictions?+
Yes, if the house is inside the Carshalton Village conservation area, which covers the ponds, the High Street and the buildings around The Square, and the council controls materials and shopfronts there. Listed buildings in the core add consent requirements, so we confirm the status before suggesting a design.
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