MCIAT chartered drawings · Fixed fees across all 33 London boroughs
[email protected]020 7864 7245WhatsApp

Free 2026 London Planning Report — Rear Extension Drawings in Wimbledon SW19

Large detached villa extension near Wimbledon Village SW19 on the hill toward the Common, London Borough of Merton
Wimbledon · SW19 · Merton

Rear Extension Drawings in Wimbledon SW19

Fixed-fee, MCIAT-chartered rear extension drawings for Wimbledon (SW19) homeowners — London Borough of Merton validation and local constraints handled from the start.

Free Wimbledon planning assessment

Tell us your Wimbledon (SW19) address and project. A fixed quote and free planning appraisal land within one working day.

No obligation · No spam · Reply within 1 working day

Wimbledon (SW19) in Merton splits between the grand villa streets climbing toward the Village and the Common, and the busier 'town' around the station and Broadway. On the hill, larger plots and the conservation-area setting mean extension scale, roof form and tree cover are closely assessed; in the town, Victorian and Edwardian terraces follow a more familiar rear-and-loft pattern.

Wimbledon Common is protected metropolitan open land, and the conservation control around the Village governs materials and rooflines on the surrounding houses. We establish where a Wimbledon property sits — hill or town, inside or outside the conservation boundary — and check for protected trees before drawing, then prepare the application to Merton's residential design and validation standards.

Large detached villa extension near Wimbledon Village SW19 on the hill toward the Common, London Borough of Merton
Isometric illustration of a Wimbledon SW19 home rear extension drawings design
Proposed floor plan
Wimbledon SW19

Planning in Wimbledon (SW19): what to know before you apply

SW19 has no householder Article 4 direction, so many Wimbledon houses retain permitted development rights — but the conservation control around the Village and Common, the protected Common open land, and Tree Preservation Orders on the larger hill plots are each checked before we recommend a route.

Typical Wimbledon housing stock

Grand detached and semi-detached villas up the hill toward Wimbledon Village and the Common, Victorian and Edwardian terraces in the 'town' around the station and South Wimbledon, and interwar semi-detached houses further out.

Streets we regularly draw for in Wimbledon

Wimbledon Hill Road · Ridgway · Worple Road · The Broadway

Rear Extension Drawings for Wimbledon (SW19) homes: the package and the process

Every rear extension drawings we prepare for an Wimbledon property is drawn to London Borough of Merton’s validation standards and tuned to the SW19 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
RouteWhen it appliesTypical fee
Permitted development (Lawful Development Certificate)Depth within 3m (terraced/semi) or 4m (detached), height and materials within PD limitsPD/LDC pack ~£950–£1,450
Larger home extension (prior approval)Depth up to 6m (terraced/semi) or 8m (detached), with neighbour notificationfrom £1,100
Full householder planning permissionExtension exceeds PD/larger-home limits, or the property is in a conservation area with an Article 4 directionFull Planning pack ~£1,600–£2,400
Planning + Building Regulations (structural)Combined planning and construction-ready pack with structural calculations for the opening and roofPlanning + Building Regs pack ~£2,200–£3,850

Also in Wimbledon SW19

Planning PermissionPlanning DrawingsArchitectural DrawingsBuilding Regulations DrawingsLoft Conversion DrawingsRear Extension Drawings across MertonRear Extension Drawings across London
FAQ

Rear Extension Drawings in Wimbledon SW19 — 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 Merton?+
The interwar semis of Raynes Park and Morden often keep permitted development rights for rear extensions and lofts, so a full application isn't always needed. Conservation areas such as Wimbledon Village, Wimbledon Common and the John Innes estate at Merton Park restrict this. We check your street's designation first and can confirm permitted development with a Lawful Development Certificate.
What is special about building at the John Innes estate in Merton Park?+
The John Innes estate is a planned Arts-and-Crafts conservation area with a distinctive character the council protects closely — materials, proportions and rooflines are all controlled. Permitted development is often restricted there, so we design to the estate's character and prepare a full, context-led application, which is the reliable route to approval.
What do Merton's HMO Article 4 directions affect?+
In designated wards, an Article 4 direction removes permitted development for change of use to an HMO (C3 to C4), so a conversion to a house in multiple occupation needs a full application there. It doesn't affect a standard family extension, but if you are considering an HMO we confirm whether the direction covers your address and use before advising.
How long does Merton Council take to decide?+
Merton determines most householder applications within the statutory eight-week period once validated; Wimbledon and Merton Park conservation 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 Merton?+
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 Merton approves. A suburban Raynes Park extension and a Wimbledon Village or Merton Park application differ in the evidence required, so we quote once we understand your address and project rather than by the hour.
Free Fixed Quote

Get your free Wimbledon planning assessment

Tell us your Wimbledon (SW19) address and ambition — we'll confirm feasibility, local constraints and a fixed fee within one working day.