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Postcode coverage

Architectural drawings in W1K

Mayfair — covered by Westminster City Council.

W1K at a glance

Primary area
Mayfair
Borough
Westminster
Planning authority
Westminster City Council
Article 4 in force
Yes
Conservation areas (borough)
56
Quote turnaround
Same day

Chartered architectural technologist at work — architectural drawings in London
Services in W1K

Drawings for every W1K property type

Questions about W1K

W1K planning FAQ

What borough is W1K?

W1K primarily covers Mayfair in Westminster.

Do I need planning permission in W1K?

Decisions for W1K are made by Westminster City Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Westminster: Yes.

What does it cost to get drawings in W1K?

Building regs from £950. We do not charge hourly. Free site survey across all W1K addresses.

How long does a project take in W1K?

From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Westminster City Council timelines align with the national norm.

What housing stock dominates W1K?

Mayfair in W1K is characterised by the housing stock of Westminster — broadly grand georgian and regency terraces in belgravia and pimlico.

Boroughs covering W1K

Local authorities

Nearby postcodes in Westminster

An architectural technologist checking a printed set of house drawings, marking a proposed elevation in red — architectural drawings in W1K
Every set is checked line by line against the validation checklist before it leaves the office.
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Which postcode districts around W1K do we cover for drawing package work?

Every W1K postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. W1K fees below are the statutory England rates for 2026, not drawing package estimates.

PostcodeAreaDominant stockWhat it means for a drawing package
W1KMayfairGeorgian townhouses, listed buildingsA drawing package at an W1K address in Mayfair is determined by Westminster City Council under its own Local Plan policies for Mayfair.
NW8St John's WoodVictorian villas, mansion blocksAdjoining district to W1K, also inside Westminster for drawing package purposes.
SW1AWhitehall / Buckingham Palacemixed stockAdjoining district to W1K, also inside Westminster for drawing package purposes.
SW1EVictoriaRegency terraces, post-war flatsAdjoining district to W1K, also inside Westminster for drawing package purposes.
SW1HSt James's Parkmixed stockAdjoining district to W1K, also inside Westminster for drawing package purposes.

How does a drawing package differ street by street across W1K?

Roof pitch, wall build-up and plot depth change every few W1K streets, and each one changes what a drawing package can achieve at that address.

What local planning policy applies to a drawing package in W1K?

W1K (Mayfair) conservation designations: there are 56 across Westminster City Council, Marylebone, Pimlico, Soho among them. Designation costs a W1K (Mayfair) 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 W1K (Mayfair) designation that most often changes a drawing package design.

What Article 4 removes near W1K (Mayfair): 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 W1K address is inside the mapped area, because Westminster City Council draws the W1K (Mayfair) boundary street by street rather than across the whole of W1K (Mayfair).

Digging below a W1K (Mayfair) 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 W1K (Mayfair) involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a W1K (Mayfair) dig within 3 m of a neighbour, and Westminster City Council expects the W1K ground conditions addressed in the application.

W1K (Mayfair) 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. Heritage-first planning approach; listed buildings on almost every street; basement and rear extension policies particularly strict. Read that before choosing a drawing package route in W1K (Mayfair) — construction, not postcode, sets what is achievable. Westminster City Council charges £548 for a householder application and has 8 weeks to determine it.

What happens if a W1K property sits on a boundary?

Sources for this W1K 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.

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Architectural drawings in W1K — a London terraced street of the type we survey
A london terraced street of the type we survey — architectural drawings in W1K.
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