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Free 2026 London Planning ReportDouble Storey Extension Drawings in Paddington W2

Flat conversion drawings for a stucco-fronted terrace in Paddington W2, City of Westminster
Paddington · W2 · Westminster

Double Storey Extension Drawings in Paddington W2

Fixed-fee, MCIAT-chartered double storey extension drawings for Paddington (W2) homeowners — Westminster City Council validation and local constraints handled from the start.

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Paddington (W2) in Westminster is dominated by wide stucco-fronted terraces that were built as single family houses and subdivided into flats generations ago. The Bayswater and Queensway conservation areas protect those uniform painted frontages, while the Hallfield Estate conservation area protects something quite different — a post-war modernist estate whose original design is the reason for the designation.

Two Article 4 directions shape most W2 projects. Westminster has removed permitted development rights for basement development, so the lower-ground excavations that are common under these tall terraces need a full planning application from the outset. The Class E to C3 direction in the Central Activities Zone does the same for commercial-to-residential conversion. Because so much of W2 is flats within those subdivided terraces, tenure usually matters as much as designation: flats carry no permitted development rights at all, so freeholder consent runs alongside the application. We confirm the tenure, the Article 4 position and which conservation area an address sits in before drawing to Westminster's guidance.

Flat conversion drawings for a stucco-fronted terrace in Paddington W2, City of Westminster
Isometric illustration of a Paddington W2 home double storey extension drawings design
Proposed floor plan
Paddington W2

Planning in Paddington (W2): what to know before you apply

W2 is covered by Westminster's Article 4 direction removing permitted development rights for basement development, so lower-ground excavation needs a full planning application. The Class E to C3 direction applies in the Central Activities Zone, removing the right to convert commercial floorspace to residential without permission. Three conservation areas apply — Bayswater, Queensway and the Hallfield Estate — the first two protecting stucco frontages and the third a post-war modernist scheme. Much of the district's stock is flats within subdivided terraces, which have no permitted development rights regardless of designation.

Typical Paddington housing stock

Wide stucco-fronted terraces built as single houses around Bayswater and Queensway and long since subdivided into flats, alongside the Hallfield Estate — a listed post-war modernist scheme that is protected as a conservation area in its own right.

Streets we regularly draw for in Paddington

Praed Street · Sussex Gardens · Westbourne Terrace · Craven Road

Double Storey Extension Drawings for Paddington (W2) homes: the package and the process

Every double storey extension drawings we prepare for an Paddington property is drawn to Westminster City Council’s validation standards and tuned to the W2 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

A double storey extension builds a second floor above a single-storey side or rear addition, typically adding a bedroom and bathroom upstairs over a widened kitchen or reception room below. Because the foundations and roof of a single-storey extension already carry most of the fixed cost of building, adding a floor on top is often the most cost-effective way to gain two rooms rather than two separate projects. The trade-off is scrutiny: a two-storey addition sits closer to eye level with neighbouring windows and gardens, so councils examine massing, roofline and boundary distance more closely than they would a single-storey extension.

DrawingsDirect draws double storey side and rear extensions for full planning and building regulations, with structural calculations for the additional floor load and foundations produced in-house by our MCIAT-chartered team, on a fixed fee. If a single storey is enough, see our Rear Extension and Side Return Extension pages, or combine both with a Wraparound if you are extending sideways as well as up.

Do I need planning permission for a double storey extension in London?

Almost always. Permitted development rights for two-storey extensions are far more restrictive than for single-storey work, particularly on how close the new structure can come to a boundary and how closely its roof pitch and eaves height must match the existing house, so most double storey projects are drawn and submitted as full householder planning applications rather than relying on permitted development.

Where the property sits in a conservation area or is subject to an Article 4 direction, any remaining permitted development allowance for a second storey is typically removed entirely, reinforcing the need for a full application. We check your property's status and your borough's design guidance before drawing.

How do councils control the impact of a double storey extension on neighbours?

Because a second storey introduces new windows and massing at first-floor level, London boroughs apply design guidance aimed specifically at protecting neighbouring light, privacy and outlook.

  • The 45-degree rule, tested at neighbouring windows, to check the extension does not block an unreasonable amount of daylight
  • A common design expectation that a two-storey side extension is set in roughly 1 metre from the shared boundary, rather than built hard against it
  • A first floor commonly set back from the ground floor front elevation, so the upper storey reads as subordinate to the main house from the street
  • Obscure or high-level glazing on flank walls facing directly into a neighbour's garden or windows, to limit overlooking
Extending once vs twice: single versus double storey
OptionWhat it addsTypical fee
Single-storey rear extensionA ground-floor kitchen-diner only, may qualify for permitted developmentsee Rear Extension Drawings, from £1,100
Double storey side or rear extensionTwo rooms across two floors, usually needs full planningFull Planning pack ~£1,600–£2,400
Double storey + Building Regulations (structural)Combined pack including structural calculations for two-floor loads and foundationsPlanning + Building Regs pack ~£2,200–£3,850
Wraparound (rear + side return)Combines two single-storey extensions into one L-shaped ground floorsee Wraparound Extension Drawings, from £2,200
FAQ

Double Storey Extension Drawings in Paddington W2 — FAQs

How much does a double storey extension cost to design in London?+
Double storey extension drawings start from £2,400, covering full planning permission and structural design for the additional floor. A combined planning and building regulations package with full structural calculations runs up to around £3,850, fixed and agreed upfront.
Do I need planning permission to add a second storey?+
In almost all cases, yes. Permitted development rights for two-storey extensions are much tighter than for single-storey work, particularly around boundary distance and roof matching, so we design double storey projects on the assumption a full householder planning application is required.
Will a double storey extension overlook my neighbour's garden?+
That is exactly what planning officers check, using the 45-degree daylight rule alongside boundary set-in and first-floor set-back guidance. Where a new flank window would look directly into a neighbour's garden, we typically specify obscure or high-level glazing to address it before submission rather than after an objection.
Do I need an architect for a double storey extension?+
No. DrawingsDirect is an MCIAT-chartered architectural technologist practice, producing the same council-accepted drawings and in-house structural coordination as an architect, for a fixed fee typically around 30% lower, with structural calculations for the additional floor produced by the same team rather than a separately appointed engineer.
How long does it take to get double storey extension drawings?+
Drawings are typically ready around 7 days from survey. A householder planning application then has a statutory 8-week determination period once submitted.
Do I need planning permission for works in Westminster?+
Almost always. The great majority of Westminster falls within a conservation area and a high proportion of buildings are listed, so a full planning application — and often listed-building consent — is usually required even for modest works. Permitted development rarely applies. We screen conservation, listing and lease constraints for your address before recommending a route.
I live in a mansion block — what extra consent might I need?+
Much of Westminster's stock is mansion-block or garden-square terrace, and the lease frequently requires the freeholder's consent alongside planning for external alterations. We confirm the lease position early and design a scheme that satisfies both the freeholder and the council, since either can block an otherwise sound proposal.
Will I need a Basement Impact Assessment in Westminster?+
Usually, for below-ground works. The City Plan basement policy requires a basement impact assessment and limits scale. If you are considering a basement or lower-ground extension we flag the requirement early and coordinate the structural and drainage input so the application is complete when submitted.
How long does Westminster City Council take to decide?+
Westminster determines most householder applications within the statutory eight-week period once validated, though listed-building, basement and conservation cases frequently attract additional consultation. We prepare submissions to the council's exacting validation and design standards to avoid the drawing queries that cause most delays.
How much do planning drawings cost in Westminster?+
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. Heritage-led, listed-building and basement schemes require more evidence than a standard extension, so we quote once we understand your address and scheme rather than by the hour.
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