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Free 2026 London Planning Report — Side Return Extension Drawings in Hanwell W7

Rear extension drawings for a Victorian terrace in Hanwell W7, London Borough of Ealing
Hanwell · W7 · Ealing

Side Return Extension Drawings in Hanwell W7

Fixed-fee, MCIAT-chartered side return extension drawings for Hanwell (W7) homeowners — London Borough of Ealing validation and local constraints handled from the start.

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Hanwell (W7) keeps a genuine village feel around its green, with historic buildings on spacious, tree-filled plots giving way to consistent Victorian and Edwardian terraces on the surrounding streets. Rear and loft projects follow the familiar Ealing terrace pattern on most roads, but the conservation-area picture is more layered than it first looks.

The Hanwell Village Green conservation area protects the older core, while the St Mark's Church and Canal area runs along the Brent and the Grand Union Canal to the south. We establish which context a Hanwell property sits in — ordinary terrace, protected village core or canal-side setting — before drawing to the borough's guidance.

Rear extension drawings for a Victorian terrace in Hanwell W7, London Borough of Ealing
Isometric illustration of a Hanwell W7 home side return extension drawings design
Proposed floor plan
Hanwell W7

Planning in Hanwell (W7): what to know before you apply

W7 carries no householder Article 4 direction affecting typical work, so many Hanwell houses retain permitted development rights for rear and loft projects — but the Hanwell Village Green, St Mark's Church and Canal, and Hanwell Cemeteries conservation areas are the exceptions where character, plots and trees are actively protected. London Borough of Ealing does not publish an Article 4 schedule to the national open-data register, so we verify the current position with the council before advising.

Typical Hanwell housing stock

Late-Victorian and Edwardian terraces and semi-detached houses across the district, older historic buildings on spacious plots around the village green, and larger houses in the Golden Manor enclave.

Streets we regularly draw for in Hanwell

Church Road · Boston Road · Golden Manor · Cuckoo Avenue · Green Lane

What W7 is actually built of

Measured from 410 classified residential buildings in W7, not from a description of the area.

Hanwell W7 housing mix

Residential building form across the W7 postcode district, from 410 classified buildings.

Attached on more than one side47%
Attached on one side50%
Detached3%
Median building footprint60 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate1.33
Buildings classified410

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.

Side Return Extension Drawings for Hanwell (W7) homes: the package and the process

A side return is a structural drawing as much as a planning one. Removing the original flank wall to open the kitchen into the infill needs a beam and a padstone detail, and the new roof has to be drawn where it meets both the existing rear elevation and the boundary wall.

The boundary is the sensitive line. The drawings set out where the new wall sits relative to it, how the roof drains without discharging next door, and where rooflights fall so the officer can see the room is lit without overlooking. That detail is also what your party wall surveyor will ask for.

The extension only exists where the alley does. Mid-terrace and end-of-terrace houses with a rear outrigger are the classic case; a semi with a flank path is a different scheme with different boundary questions; and a detached house has no side return to infill at all.

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

Will I need a Party Wall Agreement for a side return extension?

Almost certainly. Because the new side wall is built on or immediately against the boundary with the neighbouring property, the Party Wall etc. Act 1996 applies, and your neighbour must be formally notified before work starts. We prepare the drawings and dimensions your Party Wall surveyor needs, and time the notice period so it runs alongside, rather than after, your planning application.

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
Sheet from a side return extension drawings package drawn for a Hanwell property in W7, showing the existing and proposed arrangement at scale
A sheet from the side return extension drawings package we submit to London Borough of Ealing for Hanwell (W7) properties.

Also in Hanwell W7

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

Side Return Extension Drawings in Hanwell W7 — 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 rear extension in Ealing?+
Many Ealing semis and terraces keep permitted development rights for a single-storey rear extension, so a full application isn't always needed. But the borough-wide Article 4 direction on HMO conversions, and conservation areas such as Bedford Park and Pitshanger, remove or restrict those rights in places. We check your address against the designations first and, where it qualifies, confirm permitted development with a Lawful Development Certificate.
What extra control applies in Bedford Park?+
Bedford Park is one of West London's most tightly controlled conservation areas, with detailed control over materials, rooflines, windows and front elevations. A standard permitted-development dormer or cladding change usually won't apply; instead we design to the area's Arts-and-Crafts character and prepare a full householder application with the elevations and materials the council expects — the reliable route to approval there.
How long does Ealing Council take to decide a householder application?+
Ealing determines most householder applications within the statutory eight-week period once they are validated. The commonest cause of delay is a validation query over missing or inconsistent drawings, so we prepare Ealing submissions to the council's validation checklist — correctly scaled existing and proposed plans, elevations and a location plan — to avoid that back-and-forth.
Can you help with a loft conversion on a 1930s Ealing semi?+
Yes. Ealing's Metro-land semis in Perivale, Greenford and Northolt suit hip-to-gable and dormer loft conversions, which frequently qualify as permitted development on semi-detached homes within the volume limits. We confirm eligibility against those limits and any Article 4 or conservation constraint, then produce the planning and building-regulations drawings.
How much do planning drawings cost in Ealing?+
We work to a fixed fee agreed before we start, typically around 30% below an architect's charge for the same council-accepted drawings, with free redraws until Ealing grants approval. The exact figure depends on the project — a single-storey rear extension differs from a double-storey or a loft — so we quote once we understand your scheme rather than on an open-ended hourly basis.
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