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Free 2026 London Planning Report — Side Return Extension Drawings in West Drayton UB7

Rear garden extension behind an interwar West Drayton UB7 semi in Hillingdon
West Drayton · UB7 · Hillingdon

Side Return Extension Drawings in West Drayton UB7

Fixed-fee, MCIAT-chartered side return extension drawings for West Drayton (UB7) homeowners — London Borough of Hillingdon validation and local constraints handled from the start.

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West Drayton (UB7) is built around a large open village green fringed by fine Georgian and early-Victorian houses, several of them listed, with a much bigger belt of interwar and postwar suburban housing beyond. Most of the rear and loft extension work we prepare here is on that outer suburban stock, where Hillingdon's standard householder expectations apply.

The West Drayton Green conservation area protects the green and its surrounding listed houses, so on properties facing or near it, frontage changes, materials and rooflines face tighter control. We confirm where a UB7 property sits relative to the conservation-area boundary before recommending a permitted-development or full-application route.

Rear garden extension behind an interwar West Drayton UB7 semi in Hillingdon
Isometric illustration of a West Drayton UB7 home side return extension drawings design
Proposed floor plan
West Drayton UB7

Planning in West Drayton (UB7): what to know before you apply

UB7's split between a listed-building-rich conservation core around The Green and a broad suburban hinterland means the right route depends heavily on location. Away from the green, Hillingdon's residential extension guidance governs; on or beside The Green, listed-building sensitivity and heritage-led design usually point to a full application.

Typical West Drayton housing stock

A historic core around The Green — fine Georgian and early-19th-century houses such as The Old House and Beechwood, with a listed former workhouse cottage row — set within a much larger area of interwar and postwar semis and terraces stretching towards Yiewsley and the railway.

Streets we regularly draw for in West Drayton

The Green · Church Road · Swan Road · Station Road

Side Return Extension Drawings for West Drayton (UB7) homes: the package and the process

Every side return extension drawings we prepare for an West Drayton property is drawn to London Borough of Hillingdon’s validation standards and tuned to the UB7 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

Behind most London terraces sits a narrow side alley, a metre or so wide, running from the front boundary to the back garden. A side return extension builds into that alley at ground floor, pushing the kitchen wall out to line up with the rest of the house and topping the new space with a glazed or pitched roof — often the single biggest transformation available to a galley kitchen without touching the garden at all. Because the alley typically sits hard against next door's boundary wall, this is also the extension type most likely to involve your neighbour directly, both through the planning application and through the Party Wall process.

DrawingsDirect draws side return extensions for full planning, coordinates the Party Wall paperwork your neighbour will need to see, and produces the structural calculations for the beam that carries the new roof, all under one MCIAT-chartered team and one fixed fee. If you are also extending the rear at the same time, our Wraparound Extension page covers the combined project.

Do I need planning permission for a side return extension in London?

Permitted development rights for side extensions are narrower than for rear extensions: they generally cap the extension at a single storey, restrict its width to no more than half the width of the original house, and limit its height. In practice, a full-depth side return running the length of a Victorian or Edwardian terrace usually exceeds one or more of these limits, so most side return projects are drawn and submitted as a full householder planning application.

Conservation area status and Article 4 directions, common across inner London terraces, remove permitted development rights for side extensions entirely in many streets, reinforcing the need for a planning application. We check your property's status before drawing.

What does a side return extension involve?

A side return infills the alley at ground floor level, structurally opening the original flank wall of the kitchen into the new space so the two areas read as one room. Unlike a rear extension, which is bounded on three sides by your own garden, a side return is bounded on one long side by the neighbouring property, which shapes almost every decision in the design, from where the roof glazing sits to how deep the new foundations need to go.

  • New flank wall built out to align with the rear of the house, following the boundary line
  • Original external wall between kitchen and alley opened up and supported on a steel or glulam beam
  • Roof over the new space either glazed in full, glazed in a strip along the boundary for a 'light well' effect, or pitched and tiled to match the main roof
  • Kitchen re-planned across the combined footprint, often incorporating an island once the room widens
Side return project options
PackageWhat it coversTypical fee
Side return, planning onlyFull householder planning application drawings for the infillFull Planning pack ~£1,600–£2,400
Side return, planning + Building RegulationsAdds structural calculations, Party Wall drawings and construction detailPlanning + Building Regs pack ~£2,200–£3,850
Side return + rear extension (wraparound)Combines both extensions into one L-shaped ground floorsee Wraparound Extension Drawings
Measured survey onlyA measured existing floor-plan set for your own architect, surveyor or builderfrom £450

Also in West Drayton UB7

Planning PermissionPlanning DrawingsArchitectural DrawingsBuilding Regulations DrawingsLoft Conversion DrawingsSide Return Extension Drawings across HillingdonSide Return Extension Drawings across London
FAQ

Side Return Extension Drawings in West Drayton UB7 — FAQs

How much does a side return extension cost to design in London?+
Side return drawings start from £1,400. The final fee depends on whether you commission planning drawings alone or a combined planning and building regulations package with structural calculations, all fixed and agreed upfront.
Can I build a side return under permitted development?+
Rarely for a full-width, full-depth side return. Permitted development for side extensions is limited on width and storeys, and most Victorian and Edwardian terraces sit in conservation areas that remove these rights anyway, so a full planning application is the usual route. We still check your specific property first, since some semi-detached and detached houses outside conservation areas retain more generous side-extension allowances.
When do I need to serve Party Wall notice on my neighbour?+
Before work starts, and ideally once your drawings and structural design are settled, since the notice needs accurate dimensions. We can prepare the supporting drawings alongside your planning application so both processes run in parallel.
Do I need an architect for a side return extension?+
No. DrawingsDirect is an MCIAT-chartered architectural technologist practice, so you get the same council-accepted drawings as an architect, for a fixed fee typically around 30% lower, with structural calculations produced in-house.
How long does a side return extension take to design and approve?+
Drawings are typically ready around 7 days from survey. A householder planning application then has a statutory 8-week determination period, running alongside your Party Wall notice period.
Do I need planning permission for a loft conversion in Hillingdon?+
Hillingdon's Metro-land semis and detached houses in Ruislip, Eastcote and Ickenham suit hip-to-gable and dormer lofts, which frequently qualify as permitted development within the volume limits. The exceptions are the conservation areas — Ruislip Village, Uxbridge and Northwood — and green-belt land toward the Colne Valley. We check your address and can confirm permitted development with a Lawful Development Certificate.
How does the Colne Valley green belt affect my Hillingdon project?+
On green-belt properties toward the western edge of the borough, extensions are assessed against strict limits on disproportionate additions to the original dwelling. It does not rule out an extension, but scale and siting matter and the case must be evidenced carefully. We confirm whether your property is green belt and design a scheme that stays within policy.
Does proximity to Heathrow affect my plans?+
It can toward the south of the borough, where aircraft-noise considerations may influence habitable-room and glazing design. We evidence these considerations within the application where they apply so the council can validate and approve without repeated revisions.
How long does Hillingdon Council take to decide?+
Hillingdon determines most householder applications within the statutory eight-week period once validated; green-belt and conservation cases can involve additional consultation. We prepare Hillingdon submissions to the council's validation checklist to avoid the drawing queries that cause most delays.
How much do planning drawings cost in Hillingdon?+
We work to a fixed fee agreed upfront, usually around 30% below an architect's charge for the same council-accepted drawings, with free redraws until Hillingdon approves. A dormer loft, a suburban extension and a green-belt case differ in the evidence required, so we confirm the fee once we understand your project rather than billing by the hour.
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