A planned suburb in three designations
Bromley's appraisals describe a garden suburb laid out in the late 1920s and 1930s by Basil Scruby, whose architect Leonard Culliford drew a masterplan of roads, amenities and plot sizes that remains largely unchanged. Much of it is an Area of Special Residential Character, or ASRC, in the Bromley Local Plan, and three of the conservation areas designated within the suburb are joined here. Chislehurst Road is by far the largest at about 25.4 hectares, The Thrifts follows at 7.0 and Station Square, the shopping square outside the station, at 2.5.
Other conservation areas in the suburb lie outside this study area and are not described here. On the NaPTAN record the station stands 30 metres beyond the study area. The south-east London guide places the suburb in its wider setting.
Records for the three conservation areas
Every statement below links to the public record it comes from; sources were re-checked on .
Three designations across three decades
Chislehurst Road, Petts Wood, Bromley reference CA11 and about 25.4 hectares, was designated on 16 May 1989 according to planning.data.gov.uk.
Station Square, Petts Wood, CA40 and about 2.5 hectares, was designated on 17 January 1995, and The Thrifts, Petts Wood, CA47 and about 7.0 hectares, on 4 January 2022.
The two larger areas have appraisals adopted in June 2025, one for The Thrifts and one for Chislehurst Road, sharing an account of how the suburb was built.
That account records that Station Square became a conservation area in 1995 after a local campaign, following permission granted on appeal in the 1970s to rebuild the south side of the square in an uncompromisingly contemporary style.
It also explains that Scruby's covenants fixed building lines, minimum cubic capacities and frontages, with walls of brick, stone or roughcast and roofs of natural clay or stone tiles at a steep pitch, as the Thrifts appraisal sets out.
Bromley's Article 4 controls
No polygon for these areas appears in the national Article 4 dataset, so Bromley's own list of directions is the record, with entries for Station Square, the Chislehurst Road conservation area and the wider ASRC.
The Thrifts appraisal states that directions there remove permitted development rights for alterations to the roof of a house and for gates, fences, walls and other means of enclosure, and the Chislehurst Road appraisal records the same two controls.
Bromley's page on Class B and C directions records that in June 2022 the council confirmed directions removing Class C roof rights in the Chislehurst Road conservation area and both Class B and Class C rights across the ASRC, in force from July 2022.
An earlier direction confined to front roof slopes in the ASRC was cancelled on 12 August 2022 because it duplicated the new one and was therefore unnecessary, as the same page explains.
Bromley's page on upward extensions adds an immediate direction, made in February 2021 and confirmed that July, removing the right to enlarge a house by adding storeys in the ASRC.
In practice a dormer, a roof extension, an extra storey or a new front wall in these streets is treated as needing an application, and Bromley's direction plans are checked for the address.
One list entry, many protected details
The NHLE dataset returns a single Grade II list entry across the three conservation areas, so protection here comes far more from designation and the directions than from listing.
The Thrifts appraisal names Kent peg roof tiles, soft red brick and a structural timber frame among details drawn from the Kent vernacular, with render filling the panels between timbers on the neo-Tudor houses.
It separates decorative framing, applied to the front, from structural frames, both usually oak or elm fixed with wooden pegs, and asks in the same guidance for repairs matching the old timbers rather than softwood or tropical hardwood.
On render the appraisal is blunt: repairs should let it move and breathe, because products claiming to eliminate damp and movement can hasten its failure.
In the Chislehurst Road area, the appraisal singles out Tudor House at the top of Birchwood Road, designed by Culliford and occupied by the builder Leslie Carter-Clout, as locally listed as well as inside the conservation area.
Sand and gravel, clay and the Kyd Brook
The BGS 1:50,000 bedrock map shows Harwich Formation sand and gravel at three of the five sample points and London Clay Formation clay and silt at two, with no superficial deposit recorded.
Both 2025 appraisals describe the local geology as predominantly gravel known as the Blackheath Pebble beds, and the Chislehurst Road appraisal notes gentle slopes along the road and the streets off it.
Free-draining gravel and shrinkable clay both occur within one suburb, so the BGS viewer is checked for the plot itself, and a crack near a large tree on clay is weighed differently from one on gravel beside a leaking drain.
The appraisals put the valley of the Kyd Brook at the centre of the suburb, with Tudor Way and Crossway appearing to follow the line of the old lane along it, according to the Thrifts appraisal.
Rivers alone account for 4.5% of the study area in Flood Zone 2 and 0.2% in Flood Zone 3 on the Environment Agency's Flood Map for Planning, and lower ground is also checked on the long-term flood risk service, which reports surface water for an area but not burst pipes or blocked drains.
Interwar houses in one statistical area
Housing figures fall back on a single LSOA, E01000815, Bromley 025E, the only one with a quarter or more of its area inside the boundaries, and it holds about 570 dwellings in the VOA 2025 release, rounded to the nearest 10.
Its build-period table is almost a single period, with 98.2% from 1919-1939 and 1.8% from 1945-1972 in the VOA age figures.
Detached houses make up 52.6% and semi-detached houses 47.4%, with no flats counted, in the VOA type table.
Band G is the largest at 56.1% and band F next at 40.4%, with 3.5% in band H and 1.8% in band E, on the VOA banding, whose counts are rounded to the nearest 10.
A stock this uniform in the VOA picture points an inspection towards original roof coverings, timber framing and render, and towards whether later alterations respected the directions.
Guides by instruction for these streets
One local guide per type of instruction sits in the first list; the second links each service's practice-wide page for comparison.
Other guides in Bromley and beyond
The south-east London guide sets the wider scene. Orpington, Chislehurst, Bromley and Hayes have guides of their own in the same borough, and Hither Green has one in the London Borough of Lewisham.
Questions on the three conservation areas
Which roof and boundary changes need permission in these streets?
In The Thrifts and Chislehurst Road, both 2025 appraisals record directions removing permitted development rights for roof alterations and for gates, fences and walls, and Bromley's Class B and C page shows roof rights removed across the ASRC from July 2022.
Can a house here be extended upwards?
Not under permitted development in the ASRC. Bromley's upward extensions page records an immediate direction of February 2021, confirmed that July, removing the right to add storeys to a house in the Area of Special Residential Character, so any such scheme needs planning permission.
When were the three conservation areas designated?
On planning.data.gov.uk, Chislehurst Road on 16 May 1989, Station Square on 17 January 1995 and The Thrifts on 4 January 2022. Together they cover about 34.9 hectares.
How old are most houses in the study area?
Interwar, almost without exception: the VOA figures date 98.2% of about 570 dwellings in the one LSOA used to 1919-1939, and its type table, with counts rounded to the nearest 10, records only detached (52.6%) and semi-detached (47.4%) houses.
Is the suburb on gravel or on clay?
Both appear. The BGS map shows Harwich Formation sand and gravel at three sample points and London Clay at two, while the appraisals describe mostly gravel known as the Blackheath Pebble beds. Gravel drains freely but can wash out under a leaking drain; clay moves with its moisture content near trees.
Why do the appraisals dwell on render and timber?
Because they carry the neo-Tudor and Voysey-influenced look of these streets. Breathable render repairs, and timber repairs matching the dimensions of the old frames and avoiding softwood or tropical hardwood, are what the Thrifts appraisal asks for, and it warns that products claiming to stop damp and movement can speed up failure.
How we work on an instruction
Hampstead Chartered Surveyors is a RICS-regulated firm (RICS Regulated Firm No. 923064) working from its registered Hampstead NW3 office. The firm does not claim premises, staff or completed instructions in an individual locality, and it does not treat a neighbourhood name as evidence about a particular building.
An instruction starts with the full address, the decision the client faces and the documents already available, such as leases, drawings, notices or earlier reports. The scope, fee and inspection date are confirmed in writing only after that review, and access to roofs, lofts, basements or common parts is agreed before the visit.
Reports include RICS Level 2 and Level 3 home surveys, building and defect investigations, party wall appointments, reinstatement cost assessments, contract administration and schedules of condition. Each report records what was inspected, what could not be seen and what further investigation the evidence supports.
Public datasets such as the conservation-area register, the National Heritage List for England, British Geological Survey mapping, the Environment Agency flood map and Valuation Office Agency housing statistics describe areas rather than individual properties. They frame questions before an inspection; they never replace it.
Reviewed by Savas Bulduk BSc (Hons) MRICS, Director & Chartered Building Surveyor at Hampstead Chartered Surveyors & Building Consultancy. Last reviewed: . Our people · RICS firm record