Loft Conversion Drawings in Brompton | From £1,225

An Article 4 Direction applies across Kensington and Chelsea, so check it before assuming Brompton permitted development survives. You cannot design for Brompton without accounting for the fact that it is Victorian stucco terraces, mansion blocks. Conservation status changes the Brompton route entirely — Kensington being the usual case among the 38 designations in Kensington and Chelsea. That check comes before anything else on a Brompton job.

The Brompton Article 4 position is established at survey, before design. On Brompton plots the original rear wall and the Brompton Cross ridge line set the envelope. The borough policy layer over every SW3 address is set out on Kensington and Chelsea planning. The Brompton survey then carries into house extension drawings in Brompton if the project runs on to construction.

Before RBKC Planning determines anything, Royal Borough of Kensington and Chelsea has to validate the Brompton submission — one to two weeks, longer if a plan is missing. Step one at a SW3 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.

A Brompton case only reaches committee if it draws significant objection. You get the full Brompton set as PDFs, plus CAD on request.

Objections on a Brompton case usually come from the immediate neighbours, not the wider SW3 area. Party wall positions on a Brompton terrace are located during the survey.

Serve party wall notices early where SW3 neighbours share a flank wall — on Brompton terraces they nearly always do. Once consent is granted, architectural drawings follows for the SW3 property.

Brompton is characterised by stucco terraces, edwardian mansion blocks, concentrated across SW3 in the Chelsea / Brompton area. A Brompton scheme is designed around what the stucco terraces can actually carry. What that means for a SW3 address: edwardian roofs run deeper front-to-back, so an L-shaped dormer over the back addition usually yields a second bedroom as well as the shower room. It is the first thing checked at the Brompton survey. RBKC Planning reads a Brompton elevation against its neighbours first.

Digging under a Brompton house is a structural question before a planning one. The Brompton measured survey is reused across planning permission for SW3 properties and building regulations drawings, so the cost lands once.

What the Brompton drawing pack contains

The drawing schedule for a Brompton project runs as follows.

• existing roof plan and section for the Brompton property
• proposed dormer elevations
• volume calculation sheet
• staircase and head-height sections
• structural steel layout

Streets and landmarks we survey around Brompton

• Sloane Avenue — terraced rear elevations — the Sloane Avenue party wall position is drawn first.
• Gloucester Road — roof profiles that set the ridge datum RBKC Planning measures a Gloucester Road dormer against.
• Fulham Road — roof profiles that set the ridge datum RBKC Planning measures a Fulham Road dormer against.
• Brompton Road — frontages visible from the highway, so Kensington materials detail governs the Brompton Road elevation.
• Old Brompton Road — terraced rear elevations — the Old Brompton Road party wall position is drawn first.
• Basil Street — front-to-back level changes that drive the Basil Street section drawings.
• Walton Street — terraced rear elevations — the Walton Street party wall position is drawn first.
• Cromwell Road — frontages visible from the highway, so Kensington materials detail governs the Cromwell Road elevation.
• Brompton Cross — it anchors the Brompton streetscape argument in an officer report.
• Brompton Cemetery — it fixes the local datum a Brompton roof extension is judged against.
• Fulham Road Jewish Cemetery — it anchors the Brompton streetscape argument in an officer report.
• Royal Brompton Hospital — schemes in view of it attract closer officer scrutiny.
• Royal Marsden Hospital — it anchors the Brompton streetscape argument in an officer report.

Getting to a Brompton survey

Surveyors travel to SW3 addresses from the studio; the nearest stations are The Stationery Office, South Kensington, Gloucester Road, West Brompton station. Appointments are booked in Brompton on weekdays and Saturdays, and the measured survey of a standard stucco terraces takes two to three hours.

Where Brompton sits

on Ordnance Survey grid reference TQ274790, inside the Kensington and Bayswater{{cite web parliamentary constituency. Location and block plans for Brompton start from that grid square. Source.

Practical detail for a Brompton submission: the closest stations to a SW3 site are The Stationery Office and South Kensington and Gloucester Road and West Brompton station; SW3 addresses are written to LONDON; dialling code 020. Site plans are drawn to the address as RBKC Planning holds it.

Brompton postcode coverage

From SW3 (Chelsea / Brompton), shared with Chelsea, the Brompton process is the same but the constraints are not.

Streets and stations in Brompton

We survey Brompton addresses on Sloane Avenue, Gloucester Road, Fulham Road, Brompton Road, Old Brompton Road, Basil Street, Walton Street and Cromwell Road. most Brompton sites are within walking distance of The Stationery Office or South Kensington or Gloucester Road.

Areas we cover around Brompton

Beyond Brompton we cover White City (W12), Parsons Green (SW6), Barons Court (W14), Brackenbury Village (W6), Sand's End (SW6), Wembley (HA0, HA9), and cross into Hammersmith and Fulham. A consent granted a mile from Brompton Cross is not a precedent for the plot next to it.

What moves the number on a Brompton job is the stucco terraces itself — party walls, level changes, and whether Kensington pulls a heritage statement into scope.

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 Royal Borough of Kensington and Chelsea on submission. London planning approval-rate dataset · Kensington and Chelsea planning · our London loft conversion drawings service · loft conversion drawings in White City.

An MCIAT chartered technologist takes the Brompton project from survey to decision. Where a Brompton case is borderline — a corner plot near Brompton Cross, a Kensington frontage, a flank wall hard onto a SW3 neighbour — we buy pre-application advice from RBKC Planning rather than gamble the statutory 8 weeks.

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.

We can usually confirm the Brompton planning route from the address alone. This Brompton page was reviewed in August 2026.