Flat 21, Carfax House, 4 Worcester Close, London, SE20 8FL

UPRN:10070007758Purpose Built Flat1 bedsBuilt 2012 onwards

LeaseholdCouncil Tax: Band CEPC: B (81)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 2mo agoArea· Census 2021

Flat 21, Carfax House, 4 Worcester Close, London, SE20 8FL

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£303,000

£287k - £318kHigh

Estimate

£303k

Range

£287k – £318k

Rent Estimate (pcm)

£1,800

£2k - £2k

Monthly

£1,800

Yield

7.32%

Verdict

Derived from HomePortfolio scores

Flat 21 earns an INVESTIGATE rating with HP Score 80/100. Investment score 77/100 reflects strong fundamentals. Crime intensity is low. Walkability is good (76/100). 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 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

80/ 100

Strong

Investment Score

77/ 100

High

Crime Score

25/ 100

Moderate

Walkability

76/ 100

High

Transit & Bike

Transit 58Bike 65

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Reduced confidence2 independent sourcesLead to verifyListing checked 4 Nov 2026

Fewer independent sources agree, or a component could not be scored.

Check before relying on this score: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge0.6/15
claims [AVM +2.6% (HIGH), sold-comps +0.7%, £/sqft +0.7%] → measured edge +0.11pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp
Market estimate used (HIGH confidence) · snapshot 13 Oct 2026
- valuation_snapshotsestimate for 10070007758· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 8%· as of 19 Oct 2026
Rental economics17.1/40
gross yield 7.3%; range width penalty ×0.92
- valuation_snapshotsrent estimate 1800/mo (range 1700-1950)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -52/mo, -3% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 308 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge
- portal_listingsprice_changes + first_published_date· as of 4 Nov 2026
Risk & liquidity14.6/15
208 sales/12mo in area; valuation range width 10%
- property_intelligencetransactions_12mo

4 of 4 components scored. Ranks on gross yield, the stress margin, risk and disclosed facts. A pricing claim earns only its measured edge: today 0 for the market estimate and at most +0.5pp for sold evidence. The score itself is not yet checked against the outcomes of homes it scored.

Economics

What happens to your money

Price sensitivity

£221,000£339,000

The same scorer re-run at hypothetical asking prices, holding rent, comps and listing history constant. Not a prediction of what the seller would accept.

Your assumptions

Purchase price£295,000

At the asking price

Monthly rent£1,800/mo

Evidenced range £1,700-£1,950

Interest rate5.4%

Loan to value75%

Cash required: £94,550
Net cash flow: £251/mo
Cash on cash: 3.2%
Score at this price: 32

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.81 - 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_snapshotsestimate for 10070007758Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 8%Valuation edge · as of 19 Oct 2026
valuation_snapshotsrent estimate 1800/mo (range 1700-1950)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 Nov 2026

Risks

What could kill this deal

Score confidence is reduced
fewer independent sources agree, or a component could not be scored
Rental economics needs verification before you rely on it
rent estimate 1800/mo (range 1700-1950)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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. Treat the gap to the estimate as unproven - compare recent sold prices on the street yourself before pricing an offer around it.
On later completions, homes listed below their estimate sold at the same share of the asking price as the rest.
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£303,000

Rent Estimate (pcm)£1,800

Gross Yield7.32%

1y Growth+0.7%

3y Growth+0.9%

5y Growth-0.6%

10y Growth+1.1%

Last Sold Price£295,000 (2023-04-28)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SE20 8FL

Approval Rate

-12mo

Development

low

22/03824/CON1
Details submitted to comply with the requirements of the following conditions relating to planning permission 22/03824/FULL1: Condition 3 - Construction and Environmental Management Plan
Pending
26/01616/CON
Details submitted to comply with the requirements of the following conditions relating to planning permission 26/01616/FPA: Condition 4 - Drainage
Pending
26/01616/CON1
Details submitted to comply with the requirements of the following conditions relating to planning permission 26/01616/FPA: Condition 6 - Cycle Storage Condition 7 - Refuse Storage
Pending

View Planning Timeline

Ownership

Corporate Ownership66.4%
Overseas OwnershipNo
Lease Term Remaining108 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2023-04-28
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

15 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£43,981

Population Density13,365 /km²

Owner Occupied38%

Age Distribution

0-15 15%16-64 78%65+ 7%

View Area Profile

Schools Nearby

Harris City Academy Crystal Palace
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
James Dixon Primary School
0.2 mi
Good
Cypress Primary School
0.5 mi
Good
All Saints CofE Primary School
0.6 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.

3 of 14 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Carfax House, 4 Worcester Close
-
£390k
-
Carfax House, 4 Worcester Close
-
£275k
-
Carfax House, 4 Worcester Close
-
£275k
-
Carfax House, 4 Worcester Close
-
£296k
-

Boundary data not available for this property

No registered title polygon, building footprint, or street match for this property yet.

Why: No HMLR INSPIRE / OSM footprint / OS Open USRN match for this UPRN

Source: HM Land Registry INSPIRE / OpenStreetMap / OS Open USRN