20 Brompton Square, London, SW3 2AD

UPRN:217007808Detached Property5 bedsBuilt before 1900

FreeholdCouncil Tax: Band HEPC: D (68)

Data freshness:Price Paid· freshPlanning· 3mo agoEPC· 4mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 1mo agoArea· Census 2021

HP Score

/ 100

Mixed

Verdict

2 days ago

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

20 of 21 sources

Sale Estimate

£2,239,000

£1.79M - £2.69MLow

Estimate

£2.24M

Range

£1.79M – £2.69M

Rent Estimate (pcm)

£9,050

£8k - £10k

Monthly

£9,050

Yield

1.50%

Verdict

Derived from HomePortfolio scores

20 Brompton Square earns an INVESTIGATE rating with HP Score 66/100. Investment score 64/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (99/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is freehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesEPC RegisterPortal listingsOfcom Connected NationsOfcom mobile coverageMarket estimates (third-party AVM)HM Land Registry sales matched to addressDefra strategic noise mapping, England Round 4 (Contains Defra data © Crown copyright and database right 2023-2024, Open Government Licence v3.0)Walk ScoreONS Census 2021Police.ukHM Land Registry company ownershipHM Land Registry covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

66/ 100

Mixed

Investment Score

64/ 100

Moderate

Crime Score

84/ 100

Elevated

Walkability

99/ 100

Excellent

Transit & Bike

Transit 69Bike 74

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

asking price missing or outside scoring range

Withholding a score is deliberate. A number built on missing or stale inputs would look more certain than the evidence allows.

Economics

What happens to your money

Your assumptions

Purchase price£7,250,000

At the asking price

Monthly rent£9,050/mo

Evidenced range £8,250-£9,900

Interest rate5.4%

Loan to value75%

Cash required: £2,960,050
Net cash flow: -£18,203/mo
Cash on cash: -7.4%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.37 - below the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion

Property risk deep-dive →flood, subsidence, crime, environment - the full domain

Plan

Before you offer

1. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Every step above was generated from a specific gap or flag in the evidence - no generic advice, no invented tasks.

Valuation & Market

Sale Estimate£2,239,000

Rent Estimate (pcm)£9,050

Gross Yield1.50%

1y Growth-82.0%

3y Growth-9.5%

5y Growth-4.5%

10y Growth-2.4%

Last Sold Price£1,875,000 (1997-03-05)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

6SW3 2AD

Approval Rate

16.7%12mo

Development

low

26/07272/LBC
Installation of 1 temporary structures (marquee) on the gravelled terrace above basement level. (Linked with 26/07271/FULL)
Pending
26/07271/FULL
Installation of temporary marquee structure on the gravelled terrace above basement level.
Pending
26/07236/ADLBC
details of the proposed paving materials either side the length of the wall to be replaced, including photographs of the existing paving (taken before the works begin) and photographs of samples of the paving to be reinstated or newly laid, along with plan drawings showing what paving materials will be used where and the proposed render to be used on the new wall, including specifics of its finished colour and photographs of samples pursuant to condition 3 of listed building dated 19th March 2026 (RN:25/09235/LBC )
Pending

View Planning Timeline