Where the figures are drawn from
Three Wandsworth conservation areas are combined here into a study area of about 45.4 hectares: Sutherland Grove, the largest at 27.4 hectares, West Hill Road at 14.5 and Wimbledon Park Road at 3.5. Wandsworth's urban design study records that Southfields was once part of Earl Spencer's estate, sold off in the 1870s, and that the underground railway first reached the borough with stations at East Putney and Southfields.
River flood zones register 0.0% of the study area, yet the council's surface water plan logs sewer and surface-water flooding on the streets that give all three conservation areas their names, so drainage gets more room here than rivers do. Of the three appraisals Wandsworth publishes, the one used in detail is Wimbledon Park Road's, and the borough as a whole is covered by the Wandsworth guide.
Council and national records for the three areas
Every statement below links to the public record it comes from; sources were re-checked on .
Record start dates from 1985 to 1992
West Hill Road, reference 3825, has the earliest record start date of the three, 30 October 1985, followed by Wimbledon Park Road, reference 9503, for which only the year 1989 is held, and Sutherland Grove, reference 3822, with 23 November 1992.
Wandsworth's Wimbledon Park Road appraisal also gives 1989 as that area's designation year, matching the national record.
The council's conservation area appraisals page links an appraisal for each of the three, and those documents, rather than the national dataset, set out what each boundary is meant to protect.
The Wimbledon Park Road estate
The appraisal describes a formal estate of 1920s terraces of similar design, bounded by Wimbledon Park Road, Pulborough Road and Granville Road and built by the developers Allen & Norris on low-lying land just west of the Wandle Valley flood plain.
Gabled fronts with square bays on both floors, red brick with decorative clay tile hanging on the bays, plain clay tiled roofs and deeply recessed porches on polished pink granite columns are the features the same appraisal records.
Original windows are timber casements with leaded top lights, and the document urges owners to repair rather than replace them, adding secondary glazing, and to remove porch infills that hide the original doors.
Permission to demolish any of the clinker-brick front walls is unlikely, the appraisal says, and enforcement action has been taken against unauthorised demolition on Wimbledon Park Road, the only road with front gardens deep enough for a car, so a hardstanding there is matched to a permission.
The appraisal also names the Grade II Church of St Michael and All Angels as part of the area's special character and notes that a high proportion of houses keep their black and white tiled front paths.
Sewers and flow paths, not rivers
The Environment Agency's Flood Map for Planning records 0.0% of the study area in Flood Zone 2 and 0.0% in Flood Zone 3.
Wandsworth's surface water management plan, dated December 2021, nevertheless records seven historic flood reports in its Southfields catchment, all along surface-water flow paths from Wimbledon Park Road, Merton Road and the railway line towards the River Wandle.
Among them the plan lists sewer flooding and blockages affecting properties along Sutherland Grove and sewer flooding on Wimbledon Park Road in June 2021, and it marks a surface-water hotspot along Granville Road and Brathway Road.
Granville Road is the northern edge of the estate in the appraisal, so for a house there past water entry and drain condition are asked about, and the address is run through the long-term flood risk service.
The plan also records tree pits built as sustainable drainage on Wimbledon Park Road and Replingham Road.
Clay under limes
London Clay Formation is mapped at all five sample points on the BGS 1:50,000 viewer, with Head recorded above it at two and no superficial deposit at the other three.
Where clay lies this close to the surface, the pollarded limes along Wimbledon Park Road that the appraisal describes are part of the reading of any crack, together with drains on the recorded flow paths.
The same appraisal reminds owners that six weeks' notice must be given to the council before work to any tree in a conservation area, pruning included.
One statistical area of housing
One LSOA, E01004629, has at least half its area inside the boundaries, and the VOA's 2025 stock of properties figures put about 650 dwellings in it, to the nearest 10.
Almost half, 49.2%, date from 1919-1939 in the VOA build-period table, followed by 18.5% from 1973-1999 and 15.4% from 2000 onwards, with 4.6% before 1900.
Flats and maisonettes are 44.6% and semi-detached houses 40.0% of the VOA type counts, terraced houses only 3.1%, and band G is the commonest at 32.3%, with bands F to H at 58.5%.
That 3.1% sits oddly beside the terraced estate in the appraisal, a sign that one statistical area cannot stand for three conservation areas, so the form of each house is confirmed on site.
Directions, squares and stations
None of the three areas appears on the list of conservation areas with directions on Wandsworth's Article 4 page, which agrees with the empty result for the study area in the national Article 4 dataset.
The same page lists change-of-use directions across the borough for offices or Class E premises becoming homes and for public houses and bars, which bear on a conversion rather than on a house's appearance.
Six open spaces in the borough are protected under the London Squares Preservation Act, two of them on West Hill Road, according to the council's urban design study.
In the NaPTAN dataset, Southfields Underground station stands 20 metres outside the boundary and East Putney Underground station 630 metres away.
Area guides and practice pages
Local guides in the first list each cover one instruction type for homes in SW18, and the second list links the practice-wide page for the same service.
Guides for nearby districts
The Wandsworth guide covers the borough as a whole. Wimbledon, Earlsfield and Putney have neighbouring guides, Wandsworth Common has one of its own, and Raynes Park is covered elsewhere in south-west London.
Questions on the three Southfields conservation areas
If the flood zones are clear, why ask about flooding?
Wandsworth's surface water management plan records seven flood reports in its Southfields catchment, including sewer flooding along Sutherland Grove and on Wimbledon Park Road. River zones say nothing about sewers or surface water, so drains and any past water entry are raised with the seller.
Do Article 4 directions cover these conservation areas?
None of the three is on Wandsworth's Article 4 list. Conservation-area controls still apply to demolition and trees, and the borough's change-of-use directions affect conversions.
Can a Wimbledon Park Road front wall be removed for parking?
The appraisal calls the clinker-brick walls fundamental to the area and says permission to demolish them is unlikely, and the council has taken enforcement action over unauthorised demolition on that road. An existing hardstanding is checked against the planning history.
What were the Wimbledon Park Road estate houses built from?
Red brick with clay tile hanging on the bays, plain clay tiled roofs, timber casements with leaded top lights and recessed porches on pink granite columns, as the Wimbledon Park Road appraisal records. Its guidance centres on repairing those windows and removing porch infills.
Which building period dominates the statistical area?
The interwar years. In the one LSOA used, the VOA's 2025 figures date 49.2% of about 650 dwellings to 1919-1939, and semi-detached houses and flats together make up most of the stock.
What helps before buying a house on a recorded flow path?
Any drainage survey or CCTV report, a record of any past water entry, details of non-return valves or pumps already fitted, and building control papers for rear extensions. Council records show where flooding was reported; only the house's own history shows how it fared.
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