Flat Ground Floor, 18 St Philip Square, London, SW8 3RS

UPRN:10033237528Flat/MaisonetteBeds -Built -

LeaseholdCouncil Tax: Band DEPC: -

Data freshness:Listing· freshPlanning· 2mo agoOwnership· freshRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 2mo agoArea· Census 2021Council Tax· 6mo ago

Flat Ground Floor, 18 St Philip Square, London, SW8 3RS

HP Score

/ 100

Strong

Verdict

3 days ago

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Strong fundamentals; flood risk not assessed

Evidence

17 of 21 sources

Sale Estimate

£472,000

£378k - £567kLow

Estimate

£472k

Range

£378k – £567k

Rent Estimate (pcm)

£1,950

£2k - £2k

Monthly

£1,950

Yield

5.51%

Verdict

Derived from HomePortfolio scores

Flat Ground Floor earns an INVESTIGATE rating with HP Score 76/100. Investment score 63/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is excellent (92/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is leasehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesPortal 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

76/ 100

Strong

Investment Score

63/ 100

Moderate

Crime Score

37/ 100

Elevated

Walkability

92/ 100

Excellent

Transit & Bike

Transit 49Bike 80

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

headline score requires valuation_edge (estimate confidence LOW below scoring floor)

What we could establish

Rental economics3.6/40
gross yield 5.5%; range width penalty ×0.89
- valuation_snapshotsrent estimate 1950/mo (range 1800-2100)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -531/mo, -27% of rent (6.75% on a 75% loan; disclosed service charge and ground rent); fails the stress - earns nothing
- listing_factsservice charge / ground rent from the advert· as of 4 Nov 2026
Risk & liquidity9.2/15
268 sales/12mo in area; valuation range width 40%
- property_intelligencetransactions_12mo

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£425,000

At the asking price

Monthly rent£1,950/mo

Evidenced range £1,800-£2,100

Interest rate5.4%

Loan to value75%

Cash required: £140,050
Net cash flow: -£84/mo
Cash on cash: -0.7%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.36 - clears the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Evidence

Where every number comes from

valuation_snapshotsrent estimate 1950/mo (range 1800-2100)Rental economics · as of 13 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth Valuation methodology

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Valuation edge could not be scored
estimate confidence LOW below scoring floor
Rental economics needs verification before you rely on it
rent estimate 1950/mo (range 1800-2100)

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The rent estimate rests on area-level evidence, not lettings on this street.
2. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
3. 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£472,000

Rent Estimate (pcm)£1,950

Gross Yield5.51%

1y Growth-

3y Growth-15.5%

5y Growth-2.2%

10y Growth-1.6%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

1SW8 3RS

Approval Rate

-12mo

Development

low

26/03250/DET
Approval of details pursuant to condition 4 (Window Details) of planning permission ref. 26/00800/LB and 26/00799/RG3 (Replacement of single glazed timber framed windows serving flat 14, with single glazed timber framed windows (like for like replacement), granted on 19.06.2026.
Pending
26/03164/FUL
Erection of a single-storey rear extension extending 3.0m beyond the rear wall of the original dwellinghouse, with a flat roof incorporating raised parapets and associated alterations.
Pending
26/03131/TCA
T1 - 1x Mimosa (Acacia dealbata), also known as a Wattle tree. To fell this tree and remove its stump and root system.
Pending

View Planning Timeline