Flat 3, 21 Chestnut Grove, London, SE20 8PQ

UPRN:200002801258Flat/Maisonette1 bedsBuilt 2003-2006

LeaseholdCouncil Tax: Band BEPC: C (78)

Data freshness:Planning· 4mo agoOwnership· freshEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

Flat 3, 21 Chestnut Grove, London, SE20 8PQ

HP Score

/ 100

Mixed

Verdict

yesterday

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

Evidence

19 of 21 sources

Sale Estimate

£247,000

£235k - £259kHigh

Estimate

£247k

Range

£235k – £259k

Rent Estimate (pcm)

£1,500

£1k - £2k

Monthly

£1,500

Yield

8.11%

Verdict

Derived from HomePortfolio scores

Flat 3 earns an INVESTIGATE rating with HP Score 63/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (15/100). 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

63/ 100

Mixed

Investment Score

68/ 100

Moderate

Crime Score

26/ 100

Moderate

Walkability

15/ 100

Low

Transit & Bike

Transit 68Bike 39

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceListing 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 +10.1% (HIGH)] → 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 200002801258· as of 13 Oct 2026
Rental economics24.9/40
gross yield 8.1%; range width penalty ×1.00
- valuation_snapshotsrent estimate 1500/mo (range 1400-1550)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -30/mo, -2% 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: 2 price cut(s), 212 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 & liquidity14.7/15
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

£166,500£255,500

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£222,000

At the asking price

Monthly rent£1,500/mo

Evidenced range £1,400-£1,550

Interest rate5.4%

Loan to value75%

Cash required: £69,840
Net cash flow: £289/mo
Cash on cash: 5.0%
Score at this price: 40

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 2.00 - 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 200002801258Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 1500/mo (range 1400-1550)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

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 1500/mo (range 1400-1550)
Seller motivation could not be scored
context, not scored: 2 price cut(s), 212 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge

Property risk deep-dive →

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. Ask the agent why the price was reduced and whether a previous sale fell through.
2 price cut(s) recorded on the listing history.
3. 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.
4. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Valuation & Market

Sale Estimate£247,000

Rent Estimate (pcm)£1,500

Gross Yield8.11%

1y Growth-

3y Growth+0.9%

5y Growth-0.6%

10y Growth+1.1%

Last Sold Price£195,000 (2014-01-10)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningModerate
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SE20 8PQ

Approval Rate

-12mo

Development

low

26/04351/HPA
Roof alterations comprising the removal of existing chimneys, alterations to and enlargement of the existing rear roof dormer including two rooflights, extension of the parapet wall, and associated elevational changes.
Pending
22/03824/CON2
Details submitted to comply with the requirements of the following conditions relating to planning permission 22/03824/FULL1: Condition 16 - Existing site levels and proposed slab levels and ridge heights
Pending
26/04270/LDC
Erection of single-storey timber outbuilding within rear garden. LAWFUL DEVELOPMENT CERTIFICATE (PROPOSED)
Pending

View Planning Timeline

Ownership

Corporate Ownership66.1%
Overseas OwnershipNo
Lease Term Remaining99 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2014-01-10
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 Density15,494 /km²

Owner Occupied16%

Age Distribution

0-15 23%16-64 69%65+ 8%

View Area Profile

Schools Nearby

Harris Primary Academy Crystal Palace
0.2 mi
Inspected as Malcolm Primary School (URN 101629) on 9 Oct 2012
St John's Church of England Primary School
0.3 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
St Anthony's Catholic Primary School
0.3 mi
Inspected as St Anthony's Roman Catholic Primary School (URN 101654) on 2 Mar 2016
James Dixon Primary School
0.4 mi
Good

4 of 13 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

21 Chestnut Grove
-
£230k
-
21 Chestnut Grove
-
£230k
-
21 Chestnut Grove
-
£225k
-
21 Chestnut Grove
-
£270k
-

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