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House Extension Drawings · Soho · Westminster

House Extension Drawings in Soho |

Soho and the surrounding W1D streets, near enough 30% below the London architect norm. Submissions from Soho go to Westminster City Council and are weighed against Westminster Local Plan policy for the W1D area.

What is house extension drawings in Soho?

For any W1D, W1F address, house extension drawings are survey-based Soho drawings for a rear, side or wrap-around extension in W1D, W1F. Westminster City Council determines them, Westminster Local Plan policy applies, and they fix the Soho depth against permitted-development limits, answer the 45-degree amenity test Westminster City Council applies, and locate the party wall on the georgian terraces.

House Extension Drawings in Soho — the local dataset

Soho postcode districts
W1D, W1F — Soho
Local planning authority
Westminster City Council (City of Westminster)
Dominant Soho stock
Georgian terraces, mixed-use
Statutory householder fee
£548, decided in 8 weeks
Landmarks near the W1D sites we survey
Carnaby Street, Soho Square
Article 4 Direction
In force across Westminster
Soho character
Georgian fragments, mixed-use
Conservation areas in Westminster
56, including Soho Conservation Area
Adjoining borough
Kensington and Chelsea — nearest peer area Roehampton
First-time approval rate
98% across our London caseload
Soho page reviewed
August 2026

Extension with first-floor balcony on a London house — house extensions
Local policy

Do I need house extension drawings in Soho?

An Article 4 Direction applies across Westminster, so check it before assuming Soho permitted development survives. In Soho the streetscape argument usually decides the case before the numbers do, because the area is Georgian fragments, mixed-use. Check Soho before assuming permitted development on a Soho house; Westminster designates 56 such areas. We confirm the W1D designation at survey rather than assuming it.

That check — Article 4 directions against the Soho property — happens on day one. The georgian terraces in Soho decides the depth before policy does. The borough policy layer over every W1D, W1F address is set out on Westminster planning. The Soho survey then carries into planning permission in Soho if the project runs on to construction.

Proposed rear extension plan and section for georgian terraces, Soho, submitted to Westminster City Council
Proposed rear extension plan and section for a georgian terraces, Soho, submitted to Westminster City Council
Statutory periods

How long does Westminster City Council take to decide?

The W1D, W1F bottleneck is validation. City of Westminster needs one to two weeks, and a missing drawing resets it. Step one at a W1D, W1F address is a full measured survey of the existing building.

Statutory periods: 8 weeks from validation for a householder application, 13 weeks for a major scheme, 6 weeks for prior approval with a 21 days neighbour consultation, and 5 weeks for a full plans building control submission. A party structure notice requires one month notice and two months where excavation is involved.

Expect a site visit to the Soho property during the consultation period. The W1D pack is issued at 1:100 and 1:50 with a 1:1250 location plan.

City of Westminster weighs material objections only — a Soho neighbour disliking the design is not one. We measure the W1D property room by room, including ceiling heights and floor falls.

Party wall procedure catches most W1D owners late; on Soho stock assume it applies and serve in good time. Once consent is granted, building regulations drawings follows for the W1D property.

House types here

What Soho's housing stock means for your plans

Soho is characterised by georgian terraces, mixed-use, concentrated across W1D, W1F in the Soho area. Soho rewards a survey-first approach: the georgian terraces rarely matches its own original drawings. Translated to the georgian terraces here: georgian rear elevations here are usually the listed or locally listed face of the building, so a glazed link and a lightweight rear addition tend to fare better than a full-width box. It is why the Soho existing set is measured, not traced. Massing on a Soho scheme is argued against the Carnaby Street street rhythm.

Before any W1D basement is drawn, note that Westminster basement policy restricts to single-storey, typically under 50% of rear garden footprint; lightwells and rooflights strictly controlled in conservation areas. We do not re-measure a W1D property for each stage of the job.

What the Soho drawing pack contains

Everything a Soho submission needs is in the list below.

  • existing and proposed ground-floor plans for the Soho property
  • proposed rear elevation
  • long section through the extension
  • site and block plans
  • party wall position drawing

Streets and landmarks we survey around Soho

  • Old Compton Street — front-to-back level changes that drive the Old Compton Street section drawings.
  • Denmark Street — shared flank walls, so Denmark Street party structure notices go out before work starts.
  • Gerrard Street — gardens deep enough for the 8 weeks householder route on a Gerrard Street plot.
  • Hollywood Road — shared flank walls, so Hollywood Road party structure notices go out before work starts.
  • Houston Street — roof profiles that set the ridge datum Westminster City Council measures a Houston Street dormer against.
  • Shaftesbury Avenue — terraced rear elevations — the Shaftesbury Avenue party wall position is drawn first.
  • Oxford Street — shared flank walls, so Oxford Street party structure notices go out before work starts.
  • Soho Square — terraced rear elevations — the Soho Square party wall position is drawn first.
  • Carnaby Street — massing on adjoining W1D plots is tested against it.
  • Soho Square — Westminster City Council weighs W1D sightlines to it in the character assessment.
  • Berwick Street Market — nearby georgian terraces takes its scale from this frontage.
  • Manchester Grammar School — schemes in view of it attract closer officer scrutiny.

Getting to a Soho survey

Surveyors travel to W1D addresses from the studio; the nearest stations are List of London Underground stations, Oxford Circus, Piccadilly Circus, Tottenham Court Road. Appointments are booked in Soho on weekdays and Saturdays, and the measured survey of a standard georgian terraces takes two to three hours.

Where Soho sits

on Ordnance Survey grid reference TQ294810. That grid reference is not trivia — the Soho site location plan is drawn over it, and Westminster City Council validates the address against it. Source.

Practical detail for a Soho submission: List of London Underground stations and Oxford Circus and Piccadilly Circus and Tottenham Court Road put Soho within easy reach; W1D addresses are written to London; dialling code 020. Site plans are drawn to the address as Westminster City Council holds it.

Soho postcode coverage

We draw W1D (Soho), which Soho holds on its own; W1F (Soho), which Soho holds on its own addresses, and Westminster City Council validates each on the address itself.

Streets and stations in Soho

Soho instructions come from Old Compton Street, Denmark Street, Gerrard Street, Hollywood Road, Houston Street, Shaftesbury Avenue, Oxford Street and Soho Square among others. most Soho sites are within walking distance of List of London Underground stations or Oxford Circus or Piccadilly Circus.

Areas we cover around Soho

We survey across Roehampton (SW15), Clapham (SW4), Brixton (SW2, SW9), Herne Hill (SE24), Kennington (SE11), Streatham (SW16) as well as Soho itself, plus the Kensington and Chelsea side of the boundary.

House Extension Drawings in Soho — a flat-roof rear extension with rooflights
A flat-roof rear extension with rooflights — house extension drawings in Soho.
Fee structure

How much do house extension drawings cost in Soho?

A Soho quote moves on what the building is, not on how long we spend: the georgian terraces, the party wall position, the Soho question.

Statutory application fees are set by regulation, not by the council: £548 householder, £610 for a new dwelling, £274 for a lawful development certificate, £249 for prior approval.

On a W1D submission the statutory fee goes straight to City of Westminster. London planning approval-rate dataset · Westminster planning · house extension drawings across London · house extension drawings in Roehampton.

Chartered accountability

MCIAT chartered technologists working across Westminster

MCIAT chartered technologists handle every W1D submission we make. Borderline is normal in Soho; we resolve it with Westminster City Council before submission rather than after refusal.

Drawings are produced by chartered members of the Chartered Institute of Architectural Technologists (MCIAT), the professional body for technical design and building-regulations competence. First-time approval across our London caseload is 98%. Statutory fees shown are those in force in England in 2026 under the Town and Country Planning (Fees for Applications) Regulations. Confirm your local authority at gov.uk and submission requirements on the Planning Portal. Studio: 71–75 Shelton Street, London WC2H 9JQ.

One visit to the W1D property is all we need to quote properly. This Soho page was reviewed in August 2026.

Soho questions

House Extension Drawings in Soho — common questions

Is house extension drawings always needed in Soho?

Frequently not. A Soho house that is unlisted and outside Soho normally retains permitted development. An Article 4 Direction applies across Westminster, so check it before assuming Soho permitted development survives. We confirm it at survey.

Are Soho homes in a conservation area?

Westminster has 56 conservation areas; the one that matters for a W1D address is normally Soho.

Do you survey flats and houses in Soho?

Soho work is largely georgian terraces, mixed-use, surveyed on site rather than from old plans.

Do you work in Westminster generally?

All of Westminster plus Kensington and Chelsea; Soho has its own page because W1D is not Roehampton.

House Extension Drawings in Soho — a two-storey extension with a balcony
A two-storey extension with a balcony — house extension drawings in Soho.
Other packages in Soho

Related drawings for W1D, W1F properties

House Extension Drawings near Soho

house extensions · Westminster planning · house extension drawings across London

House Extension Drawings in Soho

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