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

Shepherds Bush · W12 · Hammersmith & Fulham

Dormer Loft Conversion Drawings in Shepherds Bush W12

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

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.

Proposed floor plan

Shepherds Bush W12

Shepherds Bush (W12) — planning at a glance

Council: London Borough of Hammersmith & Fulham
Postcode district: W12
Planning portal: View the Hammersmith & Fulham planning portal
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.
Article 4: London Borough of Hammersmith & Fulham does not publish its Article 4 directions to the national planning register, so permitted development rights in Shepherds Bush (W12) can’t be confirmed from open data alone — we check the direction schedule with the council before recommending a route, as part of the fixed fee. The Old Oak & Wormholt garden-suburb cottage estate is the defining local control.
Conservation: Old Oak & Wormholt
Sample streets: Askew Road · Bryony Road · Wormholt Road · Old Oak Road · Uxbridge Road
Local constraints: Old Oak & Wormholt conservation area protecting the garden-suburb cottage estate, with its privet hedges, front gardens and wide grass vergesStrict control over rooflines, materials and boundary treatments on the cottage estate, where the original Arts-and-Crafts detailing is a defining featureConsistent Victorian terraced plots elsewhere where side-return and rear-depth expectations are well establishedOpen, low-density estate layout where extension scale is judged against the garden-suburb character

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

What W12 is actually built of

Measured from 246 classified residential buildings in W12, not from a description of the area.

Shepherds Bush W12 housing mix

Residential building form across the W12 postcode district, from 246 classified buildings.

Attached on more than one side	65%
Attached on one side	32%
Detached	3%
Median building footprint	64 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate	2.68
Buildings classified	246

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 2026-08-17.

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

A rear dormer is drawn to a tight set of geometric tests: the volume it adds, its set-back from the eaves, whether it sits below the ridge line, and how it meets the roof slope at the sides. Each of those is a dimension on the drawing rather than a description, because that is how the case is assessed.

Side-facing windows and the cheek treatment are where dormer schemes most often attract conditions. We show glazing type and opening restrictors on the elevations, and detail the cheeks and roof junction on the section, so the approved drawing is one your builder can work from without reinterpretation.

The rear roof slope is the whole opportunity. A house with a rear outrigger can carry an L-shaped dormer over both roofs, while a simple double-pitch roof takes a box dormer and nothing more — and a shallow pitch may not give usable height under either.

Is a rear dormer loft conversion permitted development in London?

A single rear dormer is the loft conversion most likely to qualify as permitted development in London, provided it stays within the volume allowance — 40 cubic metres for terraced houses, 50 cubic metres for detached and semi-detached homes. The dormer must not extend beyond the highest part of the existing roof, should be set back from the eaves where practical, and is normally finished in materials that match the existing roof. Where the numbers work, we recommend a Lawful Development Certificate rather than a full planning application, because it is faster and gives you a legal record that the work was lawful.

Box dormer or L-shaped dormer — which suits a London terrace?

A box dormer is a simple flat-roofed addition set into the rear roof slope, adding headroom and floor area over the main roof void. An L-shaped dormer links that main-slope dormer to a second dormer over the rear closet wing — the small rear addition found on most Victorian and Edwardian London terraces — and is popular because it captures far more usable space over the stairwell for a similar planning risk. Both are generally assessed the same way for permitted development, but the closet-wing element of an L-shaped dormer needs its own structural support, which we detail on the drawings and coordinate with the structural calculations.

Box dormer: single flat-roofed addition on the main rear slope
L-shaped dormer: main-slope dormer combined with a closet-wing dormer
Both are typically finished in matching brick, tile-hung or render to suit the host roof

Do front dormers need planning permission?

Permitted development for roof alterations generally excludes elevations that front a highway, so a dormer on the front roof slope facing the street almost always needs a full householder planning application, even where a rear dormer on the same house would be permitted development. Front dormers are also more visible to the council and to neighbours, so proportion, materials and set-back from the ridge and eaves carry more weight in the assessment. We draw front dormers to sit comfortably within the roofline rather than dominating it, which is what most validation teams are looking for, and where a front dormer alone will not deliver the space you need, we assess whether combining it with a rear dormer or rebuilding the rear slope as a mansard makes more sense.

Typical dormer loft conversion drawing packages
Dormer type	Typical route	Structural scope	Fee from
Single rear box dormer	Permitted development / LDC	Standard joist and beam upgrade	£1,100
L-shaped rear dormer	Permitted development / LDC	Additional closet-wing support	£1,300
Front dormer	Householder planning	Standard joist and beam upgrade	£1,600
Dormer in a conservation area	Householder planning	Standard joist and beam upgrade	£1,600

Sheet from a dormer loft conversion drawings package drawn for a Shepherds Bush property in W12, showing the existing and proposed arrangement at scale — A sheet from the dormer loft conversion drawings package we submit to London Borough of Hammersmith & Fulham for Shepherds Bush (W12) properties.

Also in Shepherds Bush W12

Planning Permission Planning Drawings Architectural Drawings Building Regulations Drawings Loft Conversion Drawings Dormer Loft Conversion Drawings across Hammersmith & Fulham Dormer Loft Conversion Drawings across London

FAQ

Dormer Loft Conversion Drawings in Shepherds Bush W12 — FAQs

How much do dormer loft conversion drawings cost in London?+

A single rear box dormer on the permitted development route typically starts around £1,100 for a full drawing set. L-shaped and front dormers cost more because of the extra structural design and, for front dormers, the planning application itself — we quote a fixed fee once we have seen your roof.

Is my dormer definitely permitted development?+

Not automatically — it depends on the volume you are adding, which elevation the dormer sits on, and whether a conservation area or Article 4 direction applies to your address. We check this free before recommending a route, and if a previous loft or roof extension has already used up part of your allowance, we factor that into the calculation too.

How long do dormer loft conversion drawings take?+

Typically around 7 days from survey to a full drawing set delivered to your online portal, whether you are going down the Lawful Development Certificate route or full planning.

Will I need an architect for a dormer loft conversion?+

No — as MCIAT-chartered architectural technologists we produce the same council-accepted drawings an architect would, typically at a lower fee, with structural calculations coordinated in-house.

What if my roof suits a different loft conversion type?+

If your roof is hipped, a hip-to-gable conversion may add more space than a dormer alone; if you are in a conservation area needing a full rebuild of the roof slope, a mansard may suit better. We assess your roof against all three before recommending one.

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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