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Westminster City Council

Architectural technology in Westminster

Planning drawings, building regulations, loft conversions, house extensions and mansards — delivered across Westminster by MCIAT chartered technologists with deep knowledge of Westminster City Council's policies.

Westminster at a glance

Planning authority
Westminster City Council
Population
205,000
Conservation areas
56
Article 4 Direction
Yes — HMO and more
Postcodes
SW1, W1, W2, W9, NW1, NW8, WC2
Typical housing
Grand Georgian and Regency terraces in Belgravia and Pimlico

Architectural technologist reviewing planning drawings — architectural drawings in Westminster
Services available in Westminster

Every architectural service in Westminster — one chartered team.

Planning Drawings in Westminster

Building Regulations Drawings in Westminster

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...

Loft Conversions in Westminster

Every loft type across every Westminster roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...

House Extensions in Westminster

The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...

Mansard Roof Extensions in Westminster

Westminster's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...

Garage Conversions in Westminster

Turn your unused Westminster garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...

Basement Conversions in Westminster

Full architectural technology service for basement digs and cellar conversions in Westminster — structural underpinning design, waterproofing...

Structural Calculations in Westminster

Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall re...

Measured Building Surveys in Westminster

Measured surveys across Westminster — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...

Party Wall Services in Westminster

End-to-end Party Wall Act 1996 service for Westminster — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...

Rear Dormer Loft Conversions in Westminster

London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Westminster property,...

Westminster planning context

Planning in Westminster

Housing stock: Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density.

Character: Heritage-first planning approach; listed buildings on almost every street; basement and rear extension policies particularly strict.

Notable conservation areas: Mayfair, Belgravia, Marylebone, Pimlico, Soho, Covent Garden, St John's Wood

Article 4 Direction: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones.

Basement policy: Westminster basement policy restricts to single-storey, typically under 50% of rear garden footprint; lightwells and rooflights strictly controlled in conservation areas.

Areas within Westminster

Drawings across Westminster by area

An architectural technologist checking a printed set of house drawings, marking a proposed elevation in red — architectural technology in Westminster
Every set is checked line by line against the validation checklist before it leaves the office.
Nearby boroughs

Boroughs adjacent to Westminster

Georgian listed townhouses in Westminster SW1
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All services in Westminster

What we do in Westminster

Planning Drawings in Westminster

Building Regulations Drawings in Westminster

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...

Loft Conversions in Westminster

Every loft type across every Westminster roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...

House Extensions in Westminster

The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...

Mansard Roof Extensions in Westminster

Westminster's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...

Garage Conversions in Westminster

Turn your unused Westminster garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...

Basement Conversions in Westminster

Full architectural technology service for basement digs and cellar conversions in Westminster — structural underpinning design, waterproofing...

Structural Calculations in Westminster

Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall re...

Measured Building Surveys in Westminster

Measured surveys across Westminster — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...

Party Wall Services in Westminster

End-to-end Party Wall Act 1996 service for Westminster — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...

Rear Dormer Loft Conversions in Westminster

London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Westminster property,...

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A printed planning application drawing set — proposed elevations, floor plans and the os location plan with the site outlined in red — architectural technology in Westminster
The planning set that goes to the council through the Planning Portal: proposed elevations, plans, and the OS location plan with your site outlined.

Where in Westminster does a drawing package actually get determined?

Every Westminster postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Westminster fees below are the statutory England rates for 2026, not drawing package estimates.

PostcodeAreaDominant stockWhat it means for a drawing package
W2Bayswater / PaddingtonVictorian stucco terracesA drawing package at an W2 address in Bayswater / Paddington is determined by Westminster City Council under its own Local Plan policies for Bayswater / Paddington.
W9Maida ValeVictorian terraces, mansion blocksMaida Vale sits wholly inside W9, so Westminster City Council validates every drawing package submitted from an W9 address.
WC2BCovent Garden / HolbornGrand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building densityWC2B straddles a boundary: Covent Garden / Holborn addresses fall to Westminster City Council or Camden Council, so confirm which authority validates the drawing package before submitting WC2B drawings.
WC2ECovent GardenGeorgian terraces, conversionsCovent Garden sits wholly inside WC2E, so Westminster City Council validates every drawing package submitted from an WC2E address.
WC2HCovent Garden / Leicester SquareGeorgian terraces, conversionsA drawing package at an WC2H address in Covent Garden / Leicester Square is determined by Westminster City Council under its own Local Plan policies for Covent Garden / Leicester Square.
WC2NCharing Cross / StrandGrand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building densityCharing Cross / Strand sits wholly inside WC2N, so Westminster City Council validates every drawing package submitted from an WC2N address.
WC2RStrandGrand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building densityWC2R covers Strand only; Westminster City Council handles the drawing package, and Strand case officers apply the WC2R conservation-area map.
NW1Camden Town / Regent's ParkVictorian terraces, mansion blocksNW1 straddles a boundary: Camden Town / Regent's Park addresses fall to Camden Council or Westminster City Council, so confirm which authority validates the drawing package before submitting NW1 drawings.

How does a drawing package differ street by street across Westminster?

Roof pitch, wall build-up and plot depth change every few Westminster streets, and each one changes what a drawing package can achieve at that address.

Does Westminster planning policy restrict a drawing package?

Westminster conservation designations: there are 56 across Westminster City Council, St John's Wood, Mayfair, Belgravia among them. Designation costs a Westminster owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Covent Garden is the Westminster designation that most often changes a drawing package design.

What Article 4 removes near Westminster: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones. Before pricing a drawing package we check whether the NW8 address is inside the mapped area, because Westminster City Council draws the Westminster boundary street by street rather than across the whole of Westminster.

Digging below a Westminster property: Westminster basement policy restricts to single-storey, typically under 50% of rear garden footprint; lightwells and rooflights strictly controlled in conservation areas. Where a drawing package in Westminster involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a Westminster dig within 3 m of a neighbour, and Westminster City Council expects the NW8 ground conditions addressed in the application.

What Westminster is built from: Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density. Heritage-first planning approach; listed buildings on almost every street; basement and rear extension policies particularly strict. That mix decides the drawing package route in Westminster more than the postcode does, and it is what a Westminster City Council case officer reads first. A householder application costs £548 paid to Westminster City Council direct, with 8 weeks to a decision once validated.

What happens if a Westminster property sits on a boundary?

Sources for this Westminster drawing package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

What are the chances of approval in Westminster?

Over the 12 quarters from 2023 Q2 to 2026 Q1, Westminster decided 1,294 householder planning applications and approved 83.2% of them — 0.2 percentage points above the London average of 83%. That places Westminster 17th of 32 London boroughs on householder approval rate. These are decisions the council reported to MHCLG, not our own sample.

83.2%of householder applications approved
1,077approved in Westminster
217refused over the same period
74.5%decided within 8 weeks
Westminster planning decisions, 2023 Q2 to 2026 Q1
MeasureWestminsterContext
Householder applications decided1,29477,680 across London
Householder approval rate83.2%83% London average
Decided within 8 weeks74.5%31st fastest of 32 boroughs
Took longer than 13 weeks16.2%the applications that overran the statutory target
Minor dwellings approval rate78.5%new-build and conversion schemes under 10 units
All application types87.7%across 14,408 decisions
Certificates of lawfulness issued533confirmations that work was permitted development

Speed matters as much as the odds. Westminster decided 74.5% of householder applications inside the eight-week statutory period and let 16.2% run past thirteen weeks. A drawing package that is complete and correctly described at validation is the part of that timeline you control; the rest belongs to the council's caseload.

Source: MHCLG District Planning Application Statistics (PS1 and PS2), 2023 Q2 to 2026 Q1, published quarterly by the Ministry of Housing, Communities and Local Government. Counts are decisions made in the window, not applications submitted. Contains public sector information licensed under the Open Government Licence v3.0.

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Neighbourhoods we cover in Westminster

12 Westminster neighbourhoods

We've delivered architectural drawings across every part of Westminster. Each neighbourhood has its own conservation context and dominant housing stock — click through for area-specific guidance.

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