Since July 2022, Petts Wood has had no permitted development for roof extensions. We check whether your street is covered before we draw a dormer.
Photo: Bill Boaden, BY-SA 2.0
Yes. Bromley's Article 4 notice explains the sequence. The council confirmed non-immediate directions on 24 June 2022 to remove permitted development rights under Part 1, Class B and C of the General Permitted Development Order in the Petts Wood area of special residential character. Class B covers additions to the roof, such as a dormer or hip-to-gable; Class C covers other alterations to the roof, such as rooflights. The directions took effect on 19 July 2022.
An earlier direction covering only front roof slopes was cancelled on 12 August 2022 because the new one duplicated it and removes Class B and C rights in the area entirely. The result is plain: in Petts Wood, a rear dormer, a hip-to-gable and even a rooflight needs a planning application.
The Chislehurst Road Conservation Area has a Class C direction, covering other roof alterations. Class B in that conservation area is already unavailable because conservation areas are excluded from it. In the rest of the borough, outside conservation areas, Class B still applies, with 40 cubic metres on a terrace and 50 on other houses.
Three situations cover most Bromley loft questions.
| Where | Roof rights | Source |
|---|---|---|
| Petts Wood area of special residential character | Class B and C removed from 19 July 2022 | Bromley Article 4 notice |
| Chislehurst Road Conservation Area | Class C removed; Class B unavailable in conservation areas | Bromley Article 4 notice |
| Elsewhere, outside conservation areas | Class B up to 40 cubic metres terrace, 50 other | GPDO Part 1 Class B |
Bromley Council, Article 4 directions, 24 June 2022; GPDO 2015 Schedule 2 Part 1.
The fee includes our measured visit. The bracketed figure applies if you already have measured drawings.
Bromley's householder checklist says elevations are mandatory if any of the proposed work is visible, and it names loft works and extensions. All elevations are required, including on semi-detached or terraced homes, with key dimensions for width, overall height and depth and the distance to boundaries where relevant. A section is needed to show any increase in height. Photographs are mandatory on every application.
Bromley has 47 conservation areas, and in June 2025 it adopted new appraisals for Shortlands Village, Bromley Town Centre, The Covert, The Thrifts and Chislehurst Road. A Shortlands house therefore falls under a documented appraisal as well as the usual limits. For example, a dormer on a Beckenham semi outside every conservation area and Article 4 area can often be proved lawful with a certificate, while a Petts Wood twin cannot.
Bromley decided 1,179 householder applications in the year to June 2026 with prior approvals set aside, 1,063 of them inside 8 weeks.
Every figure is linked to the page or document we read.
On 24 June 2022 Bromley confirmed Article 4 directions removing Part 1 Class B and C rights in the Petts Wood area of special residential character, effective 19 July 2022.
Source: Bromley Council, Article 4 directions to remove Part 1 Class B and C PD rightsOn 12 August 2022 Bromley cancelled an earlier direction that had removed Class B and C on front roof slopes only, because the new direction duplicated it.
Source: Bromley Council, Article 4 directions to remove Part 1 Class B and C PD rightsBromley's householder checklist makes elevations mandatory where any proposed work is visible, including loft works, and requires all 4 elevations even on semi-detached or terraced homes.
Source: Bromley Council, Validation checklists: Householder Planning ApplicationBromley has 47 conservation areas, and adopted new appraisals for 5 of them on 25 June 2025.
Source: Bromley Council, Conservation areasBromley decided 1,179 householder applications between July 2025 and June 2026, prior approvals excluded, and 1,063 of them were decided within 8 weeks.
Source: MHCLG, Planning application statistics PS2, July 2025 to June 2026Class B permits a roof extension of up to 40 cubic metres on a terraced house and 50 cubic metres in any other case.
Source: legislation.gov.uk, GPDO 2015, Schedule 2, Part 1, Class BTell us about your project and get a fixed, no-obligation quote back within one working day. If you don't need planning permission at all, we'll tell you that too — for free.
No. Bromley's Article 4 directions of 24 June 2022, effective 19 July 2022, remove Part 1 Class B and C rights across the Petts Wood area of special residential character, so any dormer, hip-to-gable or rooflight needs a planning application.
Yes outside conservation areas and the directed areas: up to 40 cubic metres on a terrace and 50 on other houses, not above the ridge and not on a street-facing slope. A certificate proves it.
All elevations, even on a semi or terrace, with key dimensions for width, height and depth and the distance to boundaries, plus floor plans, a location plan, and sections that show any increase in height. Photographs are mandatory.
Bromley's conservation page says 47. It adopted new appraisals and management plans for five of them on 25 June 2025, and the page links a map to check whether your house lies in one.
£765 inc survey (£565 if you supply measured drawings) for a rear dormer. That covers the measured survey, the drawings and the submission, with free revisions until the council decides. Bromley's own application fee is separate.
Answer five quick questions and get a free planning score for your exact address — instantly. Then, if you want the full picture, unlock the detailed analysis: your council's live approval rates, local precedents, constraints on your street and a step-by-step route to permission.
Same fixed quotes, same fast drawings — wherever your project is.