House Extension Drawings in Belgravia |

An Article 4 Direction applies across Westminster, so check it before assuming Belgravia permitted development survives. The prevailing character of Belgravia — white stucco Regency terraces — sets what Westminster City Council will accept near Belgrave Square and what it will resist. Of the 56 conservation areas Westminster designates, Pimlico and Soho are the ones that most often change how a Belgravia project is routed. Every Belgravia enquiry starts with that check.

Knowing how Article 4 directions apply to your SW1X address is the first thing we establish. Everything on a Belgravia scheme is measured from the regency stucco terraces outward. The borough policy layer over every SW1X, SW1W address is set out on Westminster planning. The Belgravia survey then carries into loft conversion drawings in Belgravia if the project runs on to construction.

Expect one to two weeks of City of Westminster validation on a Belgravia submission before the statutory period even begins. The Belgravia survey comes first, because a proposal drawn on wrong existing plans fails validation later.

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.

Officer queries on a Belgravia application come to us, not to you. Belgravia clients receive existing and proposed sheets in one indexed set.

We would rather redesign a SW1X rear elevation than argue an objection. Roof pitch and eaves height on a Belgravia house are measured, not scaled off.

Serve party wall notices early where SW1X, SW1W neighbours share a flank wall — on Belgravia terraces they nearly always do. Once consent is granted, architectural drawings follows for the SW1X property.

Belgravia is characterised by regency stucco terraces, listed buildings, concentrated across SW1X, SW1W in the Knightsbridge / Belgravia area. What the regency stucco terraces in Belgravia allows is a construction question first and a planning question second, and the survey answers it. On the Belgravia stock specifically: the side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage. We resolve it before the Belgravia design is fixed. The prevailing Belgravia eaves line is the reference Westminster City Council uses, which is why the proposed elevation is drawn with the neighbours on it.

Westminster City Council assesses Belgravia basements on standard grounds. Survey once, use it for every SW1X submission that follows.

What the Belgravia drawing pack contains

No add-ons later — the Belgravia scope is set out here.

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

Streets and landmarks we survey around Belgravia

• London Inner Ring Road — gardens deep enough for the 8 weeks householder route on a London Inner Ring Road plot.
• Belgrave Square — roof profiles that set the ridge datum Westminster City Council measures a Belgrave Square dormer against.
• Eaton Square — gardens deep enough for the 8 weeks householder route on a Eaton Square plot.
• Grosvenor Place — gardens deep enough for the 8 weeks householder route on a Grosvenor Place plot.
• Sloane Street — frontages visible from the highway, so Pimlico materials detail governs the Sloane Street elevation.
• Hyde Park — terraced rear elevations — the Hyde Park party wall position is drawn first.
• Green Park — closet wings that change how a rear extension meets the Green Park back addition.
• Buckingham Palace Gardens — frontages visible from the highway, so Pimlico materials detail governs the Buckingham Palace Gardens elevation.
• Belgrave Square — height and massing nearby are argued against this frontage.
• Eaton Square — massing on adjoining SW1X plots is tested against it.

Getting to a Belgravia survey

Surveyors travel to SW1X addresses from the studio; the nearest stations are London Underground stations, Hyde Park Corner, Knightsbridge, Sloane Square. Appointments are booked in Belgravia on weekdays and Saturdays, and the measured survey of a standard regency stucco terraces takes two to three hours.

Where Belgravia sits

on Ordnance Survey grid reference TQ275795. Location and block plans for Belgravia start from that grid square. Source.

Practical detail for a Belgravia submission: transport for Belgravia runs through London Underground stations and Hyde Park Corner and Knightsbridge and Sloane Square; post town for the area is LONDON; dialling code 020; Grade II* Greek revival are listed nearby, which affects adjacent SW1X schemes. Site plans are drawn to the address as Westminster City Council holds it.

Belgravia postcode coverage

Belgravia work spans SW1X (Knightsbridge / Belgravia), shared with Knightsbridge; SW1W (Belgravia / Victoria), shared with Victoria — the designations change with the district line.

Streets and stations in Belgravia

We survey Belgravia addresses on London Inner Ring Road, Belgrave Square, Eaton Square, Grosvenor Place, Sloane Street, Hyde Park, Green Park and Buckingham Palace Gardens. most Belgravia sites are within walking distance of London Underground stations or Hyde Park Corner or Knightsbridge. and Grade II* Greek revival is listed, which pulls neighbouring SW1X proposals into a setting assessment.

Areas we cover around Belgravia

Beyond Belgravia we cover Chelsea (SW3, SW10), Notting Hill (W11), Holland Park (W11, W14), Earl's Court (SW5), South Kensington (SW7), Knightsbridge (SW1X, SW7), and cross into Wandsworth. A consent granted a mile from Belgrave Square is not a precedent for the plot next to it.

Price differences between Belgravia projects come from the fabric — the regency stucco terraces, level changes, and any Pimlico heritage requirement.

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.

Those statutory fees go to City of Westminster on submission. London planning approval-rate dataset · Westminster planning · House Extension Drawings London-wide · house extension drawings in Chelsea.

MCIAT charter sits behind every Belgravia submission we make, and the same person who surveys the property signs the drawings off. For difficult Belgravia sites — anything in Pimlico, anything overlooking Eaton Square — the pre-application route is cheap insurance.

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 SW1X property is all we need to quote properly. This Belgravia page was reviewed in August 2026.