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Free 2026 London Planning Report — Rear Extension Drawings in Shepherds Bush W12

Rear extension drawings for a Victorian terrace in Shepherds Bush W12, London Borough of Hammersmith and Fulham
Shepherds Bush · W12 · Hammersmith & Fulham

Rear Extension Drawings in Shepherds Bush W12

Fixed-fee, MCIAT-chartered rear extension drawings for Shepherds Bush (W12) homeowners — London Borough of Hammersmith & Fulham validation and local constraints handled from the start.

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Shepherds Bush (W12) splits into two very different planning contexts. Around Askew Road and the Uxbridge Road the housing is standard Victorian and Edwardian terrace, where rear and loft projects follow the familiar pattern. North and west, though, the Old Oak and Wormholt estates are a garden-suburb cottage estate the London County Council built between 1912 and 1928 — and a conservation area of real character.

That means an extension on Bryony Road or Wormholt Road is a materially different application from one on an ordinary terrace nearby, with tighter control over roof form, materials, hedges and verges that define the estate. We establish which context a Shepherds Bush property sits in before drawing to the borough's guidance.

Rear extension drawings for a Victorian terrace in Shepherds Bush W12, London Borough of Hammersmith and Fulham
Isometric illustration of a Shepherds Bush W12 home rear extension drawings design
Proposed floor plan
Shepherds Bush W12

Planning in Shepherds Bush (W12): what to know before you apply

W12 carries the Old Oak & Wormholt conservation area over its LCC cottage estate, where permitted development rights are curtailed and the Arts-and-Crafts character, privet hedges and grass verges are actively protected — so extensions there are a different proposition from the ordinary terraces around Askew Road. London Borough of Hammersmith and Fulham does not publish an Article 4 schedule to the national open-data register, so we confirm the current directions and conservation boundary with the council before advising.

Typical Shepherds Bush housing stock

Victorian and Edwardian terraces around Askew Road and the Uxbridge Road, and the low-density Arts-and-Crafts-influenced cottage housing of the Old Oak and Wormholt estates built by the London County Council between 1912 and 1928.

Streets we regularly draw for in Shepherds Bush

Askew Road · Bryony Road · Wormholt Road · Old Oak Road · Uxbridge Road

Rear Extension Drawings for Shepherds Bush (W12) homes: the package and the process

Every rear extension drawings we prepare for an Shepherds Bush property is drawn to London Borough of Hammersmith & Fulham’s validation standards and tuned to the W12 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 Shepherds Bush W12

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FAQ

Rear Extension Drawings in Shepherds Bush W12 — 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 a side-return extension in Hammersmith & Fulham?+
On the Victorian and Edwardian terraces of Fulham and Shepherd's Bush a single-storey side-return or rear extension can fall within permitted development, so a full application isn't always required. Conservation areas across Fulham, Brackenbury and Ravenscourt Park, and the Peterborough Estate, restrict this. We check your street's designation first and can confirm permitted development with a Lawful Development Certificate.
Will I need a Basement Impact Assessment for a basement in Hammersmith & Fulham?+
Likely, yes. The council applies a basement policy requiring a basement impact assessment for below-ground works, covering structural stability, drainage and groundwater. Basement extensions are common on these terraces, so if you are considering one we flag the requirement early and coordinate the structural input so the application is complete when submitted.
What is special about the Peterborough Estate 'Lion houses'?+
The Peterborough Estate's distinctive red-brick 'Lion houses' carry strong conservation control over their external character, so alterations are expected to respect the estate's materials and detailing. We design to that character and prepare a full householder application where permitted development doesn't apply, which is the reliable route to approval there.
How long does Hammersmith & Fulham take to decide?+
The council determines most householder applications within the statutory eight-week period once validated; basement and conservation cases can involve additional consultation. Because the terraces are party-wall-sensitive, we prepare submissions to the borough's residential extension and basement guidance to avoid the drawing queries that cause most delays.
How much do planning drawings cost in Hammersmith & Fulham?+
We agree a fixed fee before we start, typically around 30% below an architect's fee for the same council-accepted drawings, with free redraws until the council approves. A side-return, a loft and a basement differ in complexity, so we quote once we have seen your address and project rather than by the hour.
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