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.
A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
Every loft type across every Westminster roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Westminster's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...
Turn your unused Westminster garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...
Full architectural technology service for basement digs and cellar conversions in Westminster — structural underpinning design, waterproofing...
Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall re...
Measured surveys across Westminster — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Westminster — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Westminster property,...


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.

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...
Every loft type across every Westminster roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...
Westminster's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...
Turn your unused Westminster garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...
Full architectural technology service for basement digs and cellar conversions in Westminster — structural underpinning design, waterproofing...
Chartered structural engineer calculations for every residential intervention in Westminster — steel beams, lintels, pad foundations, wall re...
Measured surveys across Westminster — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...
End-to-end Party Wall Act 1996 service for Westminster — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...
London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Westminster property,...
Leave your number and an Architectural technologist covering Westminster will call you back within 30 minutes during working hours.

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.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| W2 | Bayswater / Paddington | Victorian stucco terraces | A drawing package at an W2 address in Bayswater / Paddington is determined by Westminster City Council under its own Local Plan policies for Bayswater / Paddington. |
| W9 | Maida Vale | Victorian terraces, mansion blocks | Maida Vale sits wholly inside W9, so Westminster City Council validates every drawing package submitted from an W9 address. |
| WC2B | Covent Garden / Holborn | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | WC2B 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. |
| WC2E | Covent Garden | Georgian terraces, conversions | Covent Garden sits wholly inside WC2E, so Westminster City Council validates every drawing package submitted from an WC2E address. |
| WC2H | Covent Garden / Leicester Square | Georgian terraces, conversions | A 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. |
| WC2N | Charing Cross / Strand | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | Charing Cross / Strand sits wholly inside WC2N, so Westminster City Council validates every drawing package submitted from an WC2N address. |
| WC2R | Strand | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | WC2R covers Strand only; Westminster City Council handles the drawing package, and Strand case officers apply the WC2R conservation-area map. |
| NW1 | Camden Town / Regent's Park | Victorian terraces, mansion blocks | NW1 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. |
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.
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.
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.
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.
| Measure | Westminster | Context |
|---|---|---|
| Householder applications decided | 1,294 | 77,680 across London |
| Householder approval rate | 83.2% | 83% London average |
| Decided within 8 weeks | 74.5% | 31st fastest of 32 boroughs |
| Took longer than 13 weeks | 16.2% | the applications that overran the statutory target |
| Minor dwellings approval rate | 78.5% | new-build and conversion schemes under 10 units |
| All application types | 87.7% | across 14,408 decisions |
| Certificates of lawfulness issued | 533 | confirmations 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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Get my free quote →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.