Kitchen extension interior in an Edwardian villa in Worcester Park, Royal Borough of Kingston upon Thames

Worcester Park · KT4 · Kingston

Rear Extension Drawings in Worcester Park KT4

Fixed-fee, MCIAT-chartered rear extension drawings for Worcester Park (KT4) homeowners — Royal Borough of Kingston upon Thames validation and local constraints handled from the start.

Worcester Park (KT4) pairs the genuinely historic Old Malden village core, with its medieval church and green, against the wider Edwardian and 1930s suburb that fills most of the district.

The Old Malden Conservation Area tightens control around Church Road and Plough Green, so we check the boundary, and which side of the Kingston-Sutton line a home sits, before advising permitted development or a full application.

Proposed floor plan

Worcester Park KT4

Worcester Park (KT4) — planning at a glance

Council: Royal Borough of Kingston upon Thames
Postcode district: KT4
Planning portal: View the Kingston planning portal
Housing stock: The Old Malden core keeps a medieval church, a village green with pond and picturesque 19th-century cottages on Church Road, while the wider KT4 streets are Edwardian villas and 1920s-30s bay-fronted semis typical of the Worcester Park suburb.
Article 4: Kingston has no Article 4 direction over the Old Malden part of KT4, so permitted-development rights apply outside the conservation area boundary.
Conservation: Old Malden Conservation Area (St John's and Plough Green)
Sample streets: Church Road · Manor Drive · Kingston Road · Lawrence Avenue
Local constraints: Old Malden Conservation Area (designated 1971) protects the St John's church setting and the Plough Green cottagesThe Grade II listed St John the Baptist church and historic cottages set a high bar for materials and scale nearbyKT4 straddles the Kingston and Sutton boundary, so the correct planning authority must be confirmed per address

Planning in Worcester Park (KT4): what to know before you apply

Homes within the Old Malden Conservation Area need a full householder application with heritage justification, while the surrounding KT4 suburb usually retains permitted-development rights; confirm whether the address falls under Kingston or Sutton first.

Typical Worcester Park housing stock

The Old Malden core keeps a medieval church, a village green with pond and picturesque 19th-century cottages on Church Road, while the wider KT4 streets are Edwardian villas and 1920s-30s bay-fronted semis typical of the Worcester Park suburb.

Streets we regularly draw for in Worcester Park

Church Road · Manor Drive · Kingston Road · Lawrence Avenue

Rear Extension Drawings for Worcester Park (KT4) homes: the package and the process

Every rear extension drawings we prepare for an Worcester Park property is drawn to Royal Borough of Kingston upon Thames’s validation standards and tuned to the KT4 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

A single-storey rear extension is the most common way London homeowners add space, usually taking the form of an open-plan kitchen-diner that opens onto the garden through bi-fold or sliding doors, with rooflights or a roof lantern bringing daylight deep into the plan. Because depth and height are tightly controlled by permitted development rules and by the 45-degree rule that protects neighbouring windows, the design work sits as much in checking what the council will allow as in drawing what you want.

DrawingsDirect draws rear extensions for permitted development, the larger home extension prior-approval scheme and full householder planning, with structural calculations for the opening and roof produced in-house by our MCIAT-chartered team. If your project also involves widening the kitchen sideways or adding a second storey, see our Side Return, Wraparound and Double Storey Extension pages — many London rear extensions grow into one of those during design.

Do I need planning permission for a rear extension in London?

Many single-storey rear extensions qualify as permitted development, meaning no planning application is needed, provided depth, height and materials stay within set limits. That changes if your property sits in a conservation area or is subject to an Article 4 direction, both of which can remove permitted development rights across a street or borough — in that case a full householder planning application is required regardless of size.

Even where an extension qualifies, most homeowners obtain a Lawful Development Certificate to confirm that status in writing before building — useful for mortgage lenders, buyers and Building Control. We check your property against your borough's constraints before recommending a route.

How deep can a single-storey rear extension go?

Depth is the main constraint on a rear extension, and it depends on your house type and whether you use standard permitted development or the larger home extension scheme.

Permitted development

Standard permitted development allows a single-storey rear extension up to 3 metres deep for terraced and semi-detached houses, or 4 metres for detached houses, generally with eaves height limited to match or stay close to the existing house.

Larger home extension scheme

The prior-approval scheme extends this to 6 metres for terraced and semi-detached houses and 8 metres for detached houses. Your council writes to affected neighbours; if none object within the notification period, approval follows without a full planning application. If an objection is raised, the council assesses the impact on neighbouring light and outlook itself, rather than automatically refusing, so a well-considered design still has a good chance of approval.

Rear extension routes at a glance
Route	When it applies	Typical fee
Permitted development (Lawful Development Certificate)	Depth within 3m (terraced/semi) or 4m (detached), height and materials within PD limits	PD/LDC pack ~£950–£1,450
Larger home extension (prior approval)	Depth up to 6m (terraced/semi) or 8m (detached), with neighbour notification	from £1,100
Full householder planning permission	Extension exceeds PD/larger-home limits, or the property is in a conservation area with an Article 4 direction	Full Planning pack ~£1,600–£2,400
Planning + Building Regulations (structural)	Combined planning and construction-ready pack with structural calculations for the opening and roof	Planning + Building Regs pack ~£2,200–£3,850

Also in Worcester Park KT4

Planning Permission Planning Drawings Architectural Drawings Building Regulations Drawings Loft Conversion Drawings Rear Extension Drawings across Kingston Rear Extension Drawings across London

FAQ

Rear Extension Drawings in Worcester Park KT4 — FAQs

How much does a rear extension cost to design in London?+

Rear extension drawings start from £1,100, with the final fee set by the route your extension takes — permitted development, prior approval or full planning — and whether you need building regulations and structural calculations bundled in. The fee is fixed and agreed upfront.

Do I need an architect for a rear extension?+

No. DrawingsDirect is an MCIAT-chartered architectural technologist practice, producing the same council-accepted drawings as an architect for a fixed fee typically around 30% lower.

How long does it take to get rear extension drawings?+

Drawings are typically ready around 7 days from survey. Once submitted, councils have a statutory 8-week period to determine a standard householder planning application.

What is the 45-degree rule?+

It is a daylight test many London councils apply to check that a rear extension does not block too much light to a neighbour's nearest window, measured as a line drawn at 45 degrees from that window. We check it before submission, not after a refusal.

Will I need a Party Wall Agreement for a rear extension?+

Only if your foundations or new walls sit on or near the boundary with a neighbouring property. A straightforward rear extension set within your own plot often does not trigger the Party Wall etc. Act 1996, unlike a Side Return or Wraparound extension, which usually does.

Do I need planning permission for an extension in Kingston?+

The interwar semis of New Malden, Chessington and Tolworth often keep permitted development rights for rear extensions and lofts, so a full application isn't always needed. Conservation areas such as Surbiton, Coombe and the town centre, and riverside flood-zone constraints, can restrict this. We check your address first and can confirm permitted development with a Lawful Development Certificate.

My Kingston home is near the river — does flood risk affect my plans?+

It can. Riverside plots near Kingston lie within the Thames flood zone, and the council expects flood-risk and finished-floor-level considerations to be addressed for works there. We evidence these within the application so the council can validate and approve without repeated revisions.

Can I build a larger extension on a Coombe plot?+

Often, yes. The substantial detached houses on the Coombe hill sit on generous plots that make larger rear and double-storey extensions viable, subject to design and amenity policy. We design to use the plot fully within permitted-development allowances or a well-evidenced full application, checking the limits for detached homes first.

How long does the Royal Borough of Kingston take to decide?+

Kingston determines most householder applications within the statutory eight-week period once validated; conservation and riverside cases can involve additional consultation. We prepare submissions to the council's validation checklist to avoid the drawing queries that cause most delays.

How much do planning drawings cost in Kingston?+

We agree a fixed fee before starting, typically around 30% below an architect's fee for the same council-accepted drawings, with free redraws until Kingston approves. A suburban semi extension and a riverside or Coombe scheme differ in the evidence required, so we quote once we understand your address and project rather than by the hour.

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