Bromley, London
Loft conversion drawings in Bromley
A loft conversion in Bromley is drawn from £695 including VAT. The first question is your road, not your roof: Bromley has published 108 Article 4 directions, and any of them can take away rights that a loft would otherwise rely on.
From £695 (VAT included)
- MCIAT chartered
- £2m PI insured
- LABC Partnered
- Fixed fees, VAT included
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What shapes a loft conversion in Bromley
Bromley does not publish a loft-specific headroom or dormer-size figure that we can quote, so the local test here is the design guidance behind the Bromley Local Plan, adopted in 2,019. Roof alterations are read against the Urban Design Guide SPD, and what an officer asks about is how the new roof sits on the street rather than a number on a table.
The borough is mostly houses. 68.6 per cent of households live in a house or bungalow, and 68.5 per cent own their home, so many owners here hold a roof of their own that permitted development can reach.
Our drawings therefore concentrate on the elevation. We show the existing and proposed roof against the houses either side, so the officer can judge height, bulk and materials without having to visit first.
On a detached house or a bungalow the roofline is often visible from several sides, so we also show how the new volume reads from the road and from the neighbours' gardens. A dormer pushed hard against a party wall, or a flat roof that reads heavy beside a pitched neighbour, is the kind of detail that draws an objection, and it is far cheaper to fix on paper than on site.

Local figures for Bromley
| Measure | Value | Period | Source |
|---|---|---|---|
| Conservation areas | 47 named conservation areas published by the council | — | planning.data.gov.uk |
| Article 4 directions | 108 Article 4 directions published by the council | — | planning.data.gov.uk |
| Listed building entries | 412 list entries (Historic England, within the LPA boundary) | — | planning.data.gov.uk |
| Households living in a house | 68.6 % of households living in a house or bungalow (detached, semi-detached or terraced) | Census 2021 | nomisweb.co.uk |
| Householder decisions | 1,609 decisions | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications granted | 78.6 % | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder applications decided in time | 89.1 % decided within 8 weeks or an agreed extended period | 1 July 2025 - 30 June 2026 | assets.publishing.service.gov.uk |
| Householder appeals decided by the Planning Inspectorate | 502 householder appeals decided | decision dates 1 Jul 2021 to 30 Jun 2026 | assets.publishing.service.gov.uk |
| Householder appeals allowed | 37.6 % of householder appeals allowed | decision dates 1 Jul 2021 to 30 Jun 2026 | assets.publishing.service.gov.uk |
| GPDO 2015 Sch 2 Pt 1 Class B, para B.1(d) | 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume | — | legislation.gov.uk |
| Class B, para B.1(c) | No enlargement beyond the plane of a roof slope that forms the principal elevation and fronts a highway | — | legislation.gov.uk |
| Class B, para B.1(f) | Class B roof enlargements are not permitted development on article 2(3) land | — | legislation.gov.uk |
| Approved Document K 2013, para 1.13, Diagram 1.4 | Loft conversions where 2.0 m cannot be achieved: 1.9 m at the centre of the stair, 1.8 m at the side (half width) | — | gov.uk |
| Approved Document B Vol 1, para 2.21 | New storey above 4.5 m by loft conversion: protect the full escape route with fire-resisting doors (min E 20) and partitions (min REI 30) | — | gov.uk |
A blank value means the figure has not been published, not that there are none. Check your own address with the council.
Householder applications by street in Bromley
| Street | Applications | Approved |
|---|---|---|
| Petts Wood Road | 39 | 81% |
| Hayes Way | 36 | 67% |
| Crescent Drive | 34 | 72% |
| Village Way | 32 | 81% |
| Pickhurst Rise | 31 | 87% |
| Hayes Chase | 30 | 83% |
| Charterhouse Road | 27 | 88% |
| Farnaby Road | 27 | 88% |
| Kings Hall Road | 25 | 91% |
| St Paul's Wood Hill | 25 | 88% |
| Eden Park Avenue | 24 | 77% |
| Kent House Road | 24 | 90% |
| Broxbourne Road | 23 | 91% |
| Clock House Road | 23 | 86% |
| Elmstead Lane | 23 | 81% |
Loft enlargement in section: the permitted development limits
A dormer on the rear slope, with the limits that decide whether it needs planning permission.
- A · Extra roof volume allowed
- 40 m³ (terrace house) / 50 m³ (any other house) additional roof volume
- B · Set-back from the eaves
- Original eaves maintained; enlargement set at least 0.2 m from the eaves measured up the roof slope, so far as practicable (not required for hip-to-gable or roofs joining a rear/side extension)
- C · Height limit
- No part higher than the highest part of the existing roof
Article 4 directions and conservation areas in Bromley
Bromley has 47 conservation areas, and the national rules remove permitted development for a roof enlargement inside every one. Outside them, the borough's 108 Article 4 directions are the bigger unknown, because each one covers a defined set of addresses and each can withdraw a different right.
We read the direction against your address before suggesting a route. If your house is clear, a Lawful Development Certificate in Bromley gives written confirmation that the loft is lawful. If it is not, the work goes through householder planning, drawn up as in our planning drawings in Bromley.
Heritage is a third check. Historic England records 412 list entries in the borough, and a listed house needs separate consent for most roof work.
Surveying the roof you actually have
No two roofs can be assumed to match. Pitch, rafter depth, the line of the chimney and the position of the existing stair all vary from road to road. We survey the loft as it stands and set it on one datum with the floors beneath.
That gives three answers early: how much usable floor the roof form can yield, where the new staircase lands, and what the structure needs. It also hands the engineer real dimensions for beams and bearings, which keeps the later building regulations drawings in Bromley in step with the planning set.
Stairs deserve their own attention. Building regulations set minimum headroom for the new flight, and a house where the existing stair rises towards the front or the middle of the plan gives very different options from one with a stair against a flank wall. We test two or three positions on the survey and show you the floor you lose below for each, before any design is drawn up.
How Bromley decides household applications, and appeals
In its latest published year Bromley decided 1,609 householder applications and granted 78.6 per cent of them. 89.1 per cent were decided inside eight weeks or an agreed extension.
Refusals do not always end there. The Planning Inspectorate decided 502 householder appeals from the borough and allowed 37.6 per cent. These figures cover every type of household project and say nothing about one house, so we use them to plan time, not to forecast a result.
What the drawing set contains and what it costs
A Bromley loft set has existing and proposed floor plans, the new stair, the roof in section and all four elevations, with the block and location plans. Loft conversion drawings are priced from £695 including VAT, agreed before you commit, and are normally ready about a week after the survey.
A second chartered technologist reviews each sheet before it goes anywhere. If the council asks for changes, we redraw at no extra charge until the application is decided.
Other roof forms and nearby boroughs
Settled on a dormer? See dormer loft conversion drawings in Bromley. If an extension at the back is part of the plan, rear extension drawings in Bromley cover it. For everything we draw in the borough, start from architectural drawings in Bromley, or compare the neighbouring rules in Lewisham and Croydon.
What you receive


Related pages
Other services in Bromley
Questions
Do I need planning permission for a loft conversion in Bromley?
It depends on your address. A roof enlargement is not permitted development in any of Bromley's 47 conservation areas, and the borough's Article 4 directions can remove rights elsewhere. If neither applies, a Lawful Development Certificate can confirm the loft is lawful.
How much do loft conversion drawings cost in Bromley?
From £695 including VAT, fixed before you commit. Any council fee is paid to the council separately.
Which guidance does Bromley use for roof alterations?
The Bromley Local Plan and its Urban Design Guide SPD. We could not find a published loft-specific measurement to quote, so we check the design against the street.
How long do Bromley householder applications take?
89.1 per cent of householder applications were decided within eight weeks or an agreed extension in the latest year published. That is an average across all projects, not a promise for yours.
Sources and dates
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- planning.data.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- assets.publishing.service.gov.uk, retrieved
- legislation.gov.uk, retrieved
- gov.uk, retrieved
- gov.uk, retrieved
- bromley.gov.uk, retrieved
- bromley.gov.uk, retrieved
- nomisweb.co.uk, retrieved
- Contains public sector information licensed under the Open Government Licence v3.0.
- Contains OS data © Crown copyright and database right 2026.
- Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
- Contains Historic England data © Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026.

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