Independent desk research
Buckingham Palace
SW1A 1AA · St James's · Westminster
- Prepared for
- Investor buyer
- Report
- PSS-SW1A1AA-INV-20260618072842
- As at
- 18 June 2026
- Basis
- Public web & UK government data
Weak area-level price growth and a modest indicative yield in a leasehold flat market; flood zoning low but EWS1 unverified.
⚑ 2 findings · 1 to verify — see key findings ↓What the data shows
The area shows weak nominal growth (~-7.7%/yr, an all-types, mix-sensitive proxy) and an indicative ~3.7–5.7% gross yield in an overwhelmingly leasehold, flat-dominated market. Fluvial/tidal risk is Flood Zone 1, but surface-water risk and the block's EWS1/cladding status are unverified from desk data and decide mortgageability.
Key findings
⚑ Findings — evidenced concerns
- ⚑Flood risk (+climate) — Fluvial/tidal Flood Zone 1, But surface-water (pluvial) flood risk is Not assessed here and is Often the dominant residual risk for a defended Thames-side site — it Must be checked on the EA surface-water map. planning.data.gov.uk (DLUHC/Environment Agency, OGL)
- ⚑Sewage / storm-overflow — Storm overflow 'Brixton And Clapham SR CSO' spilled 67x (787.2h) in 2024, ~1912 m away (within the 2 km tidal-CSO search radius). Rivers Trust storm-overflow EDM annual returns (EA data)
○ Open items — verify before exchange
- ○Building safety / cladding (EWS1) — Flat-dominated area (~90% flats); no per-building EWS1/cladding data is available from desk sources, and a flat in a block with an unresolved cladding / EWS1 issue can be unmortgageable. Confirm the EWS1 and remediation status with the managing agent / freeholder before exchange. Building Safety Act 2022 / RICS EWS1 (desk note)
Balanced overview
Each signal is ranked versus its own population — higher = better.
Benchmark lines are for context only.
Investment & Market8/8 assessed
Indicative ~3.7–5.7% gross yield (LA rent over area median price), trimming to ~2.4–3.1% net on an assumed leasehold cost stack; area price growth is weakly negative.
| Band | Annual charge |
|---|---|
| Band A | £700 |
| Band B | £816 |
| Band C | £933 |
| Band D | £1,050 |
| Band E | £1,283 |
| Band F | £1,516 |
| Band G | £1,749 |
| Band H | £2,099 |
Per-band charges are projected from the area’s average Band D via the statutory A–H ratios (incl. all local and major precepts). The band distribution for this area needs the VOA CTSOP file (see evidence); the property’s exact band must be confirmed via the VOA band lookup.
MHCLG council tax statisticsArea Trajectory3/3 assessed
1,353 planning applications in 12 months are mostly heritage and conditions churn, not new homes (one major, one residential), so limited near-term supply pressure on resale values.
Property & Legal3/7 assessed
Area is ~90% flats, so tenure is presumably leasehold; the block's EWS1/cladding status, lease terms and conservation-area/Article 4 constraints need confirming and desk data can't see them.
Environmental & Physical Risk6/7 assessed
Fluvial/tidal Flood Zone 1 and low radon, but surface-water risk is unassessed and often dominant for defended Thames-side sites; a 2km CSO spilled 67 times in 2024.
Area & Neighbourhood14/14 assessed
Decile 8 deprivation (less deprived than ~76% of England), crime around the England LSOA median, high LA life expectancy, and NO2 at 32.3 µg/m³ within the 40 limit.
Connectivity2/3 assessed
Rail/Tube ~456m and 67 bus stops within 800m, but broadband peaks at ~24 Mbit/s with no full-fibre or gigabit available.
Appendix — additional context 4 signals
Questions to raise with your advisers
Suggested areas to ask, non-exhaustive.
- Check surface-water and defended/residual flood risk on the EA 'long term flood risk' map, and confirm buildings insurance / Flood Re via the freeholder's block policy.
- Storm overflow 'Brixton And Clapham SR CSO' spilled 67x (787.2h) in 2024, ~1912 m away (within the 2 km tidal-CSO search radius).
- Obtain the EWS1 form and the building's cladding / Building-Safety-Act remediation status from the managing agent or freeholder before exchange.
- Ask your conveyancer to run the environmental search (historic-landfill proximity).
- Confirm This property's tenure, remaining lease length, ground rent and service-charge history (and any major-works bills) from the title and lease.
- Confirm the property's actual VOA council-tax band (web lookup; no API).
Full detail, methodology & sources
Each signal carries its full evidence below. Scores are a percentile versus a named reference (higher = better), an ordinal band, or a factual value. 6 signals had no free data source on this run and are omitted (marked “not assessed”, never estimated). No traffic-light rating of signals and no overall score.
Investment & Market
Area Trajectory
Property & Legal
Environmental & Physical Risk
Area & Neighbourhood
Connectivity
Sources used
- Building Safety Act 2022 / RICS EWS1 (desk note) (2026 (regime))
- DEFRA PCM modelled background (NO2) (2024)
- DEFRA Strategic Noise Mapping, Round 4 2022 (road + rail Lden, WMS) (2022)
- DfT STATS19 Road Safety Data (2024)
- Environment Agency Public Register + Historic Landfill (2026-06)
- Environment Agency flood-risk-zone (via planning.data.gov.uk) (2026-06-18)
- GIAS (Get Information About Schools) + Ofsted ()
- HM Land Registry Price Paid (2026-06-18)
- HM Land Registry Price Paid (sales) + ONS Census 2021 accommodation type (stock) (2026-06-18)
- Levelling-up and Regeneration Act 2023 (second-homes council-tax premium power, effective 1 April 2025) / GOV.UK guidance (2025 (rule))
- MHCLG IoD2019 (via postcodes.io) (2019)
- MHCLG IoD2019 crime domain (2019 vintage) + data.police.uk (live) (percentile: IoD2019 (2019 vintage); live count: 2026-04)
- MHCLG council tax statistics (2026-27)
- OHID Fingertips (2025)
- ONS ASHE via Nomis (2025)
- ONS Census 2021 (Nomis) (2021)
- ONS PIPR + HM Land Registry (2026-06-18)
- Ofcom Connected Nations (2025)
- OpenStreetMap (Overpass) (2026-06-18)
- PlanIt (planit.org.uk) (2026-06-18)
- Rivers Trust storm-overflow EDM annual returns (EA data) (2024)
- UKHSA-BGS Indicative Radon Atlas (BGS WMS) (2026-06)
- data.police.uk (2026-04)
- planning.data.gov.uk (DLUHC/Environment Agency, OGL) (2026-06)
Disclaimer. This report is provided for information only and on the basis that we do not assume a duty of care or any responsibility for decisions you take in reliance on it. It is an independent, automated, desk-based information service compiled from public web and UK government data; it is NOT advice, and NOT a valuation, survey, conveyancing report or environmental search, and does not replace the formal searches, surveys and enquiries your conveyancer and surveyor carry out before exchange. Almost all signals here are area- or location-level (neighbourhood, ward, local authority or a search radius), not facts about the specific dwelling: the property's own tenure, lease terms, council-tax band, EPC, building-safety/EWS1 status, boundaries and condition must be confirmed from the title, the lease, the management company and a physical inspection. The absence of a record in a dataset does not guarantee that no issue exists. Nothing in this report limits or excludes our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for anything else that the law does not allow us to limit or exclude. Subject to that, and because this is a free, automated, information-only product, we do not accept liability for any loss arising from action taken, or not taken, in reliance on it; please verify anything material with your own professional advisers before acting. We provide the information using reasonable care and skill but give no warranty that it is accurate, complete or up to date. It is prepared for the named recipient alone and is not to be relied upon by any other person. This does not affect your statutory rights, and if any part of this disclaimer is found unenforceable the rest continues to apply.