21 Cedar Mount, London, SE9 4RU

UPRN:10003620481Purpose Built Flat2 bedsBuilt 1950-1966

LeaseholdCouncil Tax: Band DEPC: D (66)

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

HP Score

/ 100

Mixed

Verdict

3 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£299,000

£284k - £314kHigh

Estimate

£299k

Range

£284k – £314k

Rent Estimate (pcm)

£1,650

£2k - £2k

Monthly

£1,650

Yield

6.60%

Verdict

Derived from HomePortfolio scores

21 Cedar Mount earns an INVESTIGATE rating with HP Score 68/100. Investment score 63/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (45/100). 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

68/ 100

Mixed

Investment Score

63/ 100

Moderate

Crime Score

33/ 100

Moderate

Walkability

45/ 100

Mixed

Transit & Bike

Transit 12Bike 44

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 4 Nov 2026

This rests largely on a single source. Treat the score as a prompt to investigate, not a conclusion.

Valuation edge0/15
claims [AVM -0.3% (HIGH), sold-comps -4.2%, £/sqft -4.3%] → measured edge +0.00pp 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 10003620481· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 7 comps, dispersion 13.5%· as of 31 Oct 2026
Rental economics11.5/40
gross yield 6.6%; range width penalty ×0.90
- valuation_snapshotsrent estimate 1650/mo (range 1500-1750)· as of 13 Oct 2026· verify before relying on this
- listing_factslisting text signals condition works - budget before trusting any yield· as of 4 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -314/mo, -19% 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
Seller motivationNot scored
context, not scored: 0 price cut(s), 96 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
446 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

£225,000£345,000

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£300,000

At the asking price

Monthly rent£1,650/mo

Evidenced range £1,500-£1,750

Interest rate5.4%

Loan to value75%

Cash required: £96,300
Net cash flow: £130/mo
Cash on cash: 1.6%
Score at this price: 26

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.63 - 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 10003620481Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 7 comps, dispersion 13.5%Valuation edge · as of 31 Oct 2026
valuation_snapshotsrent estimate 1650/mo (range 1500-1750)Rental economics · as of 13 Oct 2026 · verify before relying on this
listing_factslisting text signals condition works - budget before trusting any yieldRental economics · as of 4 Nov 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 4 Nov 2026

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Rental economics needs verification before you rely on it
rent estimate 1650/mo (range 1500-1750)
Rental economics needs verification before you rely on it
listing text signals condition works - budget before trusting any yield

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. 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£299,000

Rent Estimate (pcm)£1,650

Gross Yield6.60%

1y Growth-

3y Growth+1.8%

5y Growth+2.0%

10y Growth+3.0%

Last Sold Price£270,000 (2019-04-16)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningModerate
LandslideModerate
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SE9 4RU

Approval Rate

-12mo

Development

low

26/03048/CON
Details submitted to comply with the requirements of the following conditions relating to planning permission 26/03048/FPA: Condition 3 - Construction and Environmental Management Plan Condition 4 - Refuse and Recycling Storage Condition 5 - Cycle Parking
Pending
26/3109/CP
Certificate of Lawfulness (Proposed) is sought for loft conversion with rear dormer. Outbuilding in the rear garden.
Pending
26/2974/K
Single storey side/rear extension with addition of side gate/access and hip to gable loft conversion with front rooflights and rear dormer and removal of chimney.
Approved

View Planning Timeline

Ownership

Corporate Ownership67.8%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2019-04-16
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

16 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£43,981

Population Density1,206 /km²

Owner Occupied70%

Age Distribution

0-15 17%16-64 60%65+ 23%

View Area Profile

Schools Nearby

Eltham College
0.2 mi
Inspected by ISI
Middle Park Primary School
0.3 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Horn Park Primary School
0.5 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
King's Oak School
0.6 mi
-

2 of 10 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

26 Cedar Mount
-
£313k
-
20 Cedar Mount
-
£340k
-
24 Cedar Mount
-
£275k
-
31 Cedar Mount
-
£295k
-

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