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Free 2026 London Planning Report — Flat Conversion 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

Flat Conversion Drawings in Shepherds Bush W12

Fixed-fee, MCIAT-chartered flat conversion 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 flat conversion 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

Flat Conversion Drawings for Shepherds Bush (W12) homes: the package and the process

Every flat conversion 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.

Converting a house into flats is one of the few residential projects in London that always needs planning permission, whatever the size of the property or the number of units created. Splitting a single dwelling into two or more self-contained homes is treated as development regardless of whether any external work is proposed, because the change affects how the building is used and how many households occupy it.

DrawingsDirect draws house-to-flats conversions from the first survey through to a submission-ready planning and building-regulations package. Sound insulation between units, separate escape routes, individual services and London's minimum space standards are designed in from the layout stage, not retrofitted once the council asks for them — which is a large part of why our schemes are approved first time.

Do I need planning permission to convert a house into flats?

Yes, always. Converting a single dwelling into two or more self-contained flats is a change from one home to several, and that subdivision is treated as development requiring a full planning application — there is no permitted development route that allows it, regardless of the property's size or whether the exterior changes at all. The application has to demonstrate that each flat meets space, layout, amenity and parking standards in its own right, not just that the building as a whole is being used sensibly.

Boroughs also weigh the loss of a family-sized house against their local housing policy, since converting a larger house into several flats reduces the stock of homes suited to families even as it adds smaller units. We take that policy context into account when advising on layout and unit numbers, rather than simply maximising the number of flats the floor area could technically support.

What sound insulation is required between flats?

Part E of the building regulations sets minimum sound insulation standards for the walls and floors separating flats, covering both airborne and impact sound. Where an existing house is subdivided, the drawings specify how the party floors and walls between units will be upgraded — additional layers, resilient bars, or a floating floor — and pre-completion sound testing is normally required before the flats can be signed off. Getting this detail right on the drawings from the outset matters, because retrofitting sound insulation after a failed test usually means taking up a finished floor or ceiling that has already been decorated.

House-to-flats conversion drawing packages in London
ConversionTypical scopeRouteFee from
House to two self-contained flatsVertical split, separate or shared entranceFull planning plus building regulations£1,600
House to three or more flatsMultiple units, fire strategy requiredFull planning plus building regs plus structural£2,400
Flat conversion with a side or rear extensionAdditional floor area added to create compliant unitsFull planning plus structural calculations£2,800

Also in Shepherds Bush W12

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FAQ

Flat Conversion Drawings in Shepherds Bush W12 — FAQs

Do I need planning permission to convert a house into flats?+
Yes, always. Subdividing a single dwelling into two or more self-contained flats is treated as development in its own right, so a full planning application is required regardless of whether the exterior of the building changes.
How much do flat conversion drawings cost in London?+
Packages start from £1,600 for converting a house into two flats and rise to around £2,800 where three or more units, structural work or an extension are involved. We agree a fixed fee once we know the scope.
What sound insulation is required between flats?+
Part E of the building regulations sets minimum airborne and impact sound standards for the floors and walls separating flats, and pre-completion sound testing is normally required before the units can be signed off.
Does each flat need a separate fire escape?+
Each flat needs its own means of escape and the building needs to be fire-compartmented between units, using fire-rated floors, walls and doors and either a protected shared stairway or separate final exits.
What is the minimum size for a flat in London?+
London applies minimum internal floor areas based on bedroom and occupancy numbers, adopted from the national space standards through the London Plan. We check every proposed flat against the relevant threshold before drawing the layout.
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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