Flat 3, Nell Gwynn House, Sloane Avenue, London, SW3 3AU

UPRN:217099320Flat/Maisonette1 bedsBuilt 1900-1929

LeaseholdCouncil Tax: -EPC: D (67)

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

Flat 3, Nell Gwynn House, Sloane Avenue, London, SW3 3AU

HP Score

/ 100

Strong

Verdict

today

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

Evidence

19 of 21 sources

Sale Estimate

£577,000

£548k - £606kHigh

Estimate

£577k

Range

£548k – £606k

Rent Estimate (pcm)

£2,600

£2k - £3k

Monthly

£2,600

Yield

5.67%

Verdict

Derived from HomePortfolio scores

Flat 3 earns an INVESTIGATE rating with HP Score 79/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (99/100). 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

79/ 100

Strong

Investment Score

68/ 100

Moderate

Crime Score

31/ 100

Moderate

Walkability

99/ 100

Excellent

Transit & Bike

Transit 79Bike 72

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 +4.7% (HIGH), sold-comps -25.3%, £/sqft -25.4%] → 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 10 Oct 2026
- valuation_snapshotsestimate for 217099320· as of 10 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 21.1%· as of 18 Oct 2026
Rental economics4.6/40
gross yield 5.7%; range width penalty ×0.85
- valuation_snapshotsrent estimate 2600/mo (range 2400-2850)· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -539/mo, -21% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 132 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
190 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

£412,500£632,500

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£550,000

At the asking price

Monthly rent£2,600/mo

Evidenced range £2,400-£2,850

Interest rate5.4%

Loan to value75%

Cash required: £183,800
Net cash flow: -£56/mo
Cash on cash: -0.4%
Score at this price: 19

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.40 - 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 217099320Valuation edge · as of 10 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 21.1%Valuation edge · as of 18 Oct 2026
valuation_snapshotsrent estimate 2600/mo (range 2400-2850)Rental economics · as of 10 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · 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 2600/mo (range 2400-2850)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 132 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.
1 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£577,000

Rent Estimate (pcm)£2,600

Gross Yield5.67%

1y Growth-

3y Growth-9.5%

5y Growth-4.5%

10y Growth-2.4%

Last Sold Price£525,000 (2021-10-28)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

1SW3 3AU

Approval Rate

100%12mo

Development

low

26/07228/ADFULL
Details of the raised boundary wall and sample panel pursuant to condition 4 of planning permission dated 30 September 2026 (RN: 26/04283/FULL).
Pending
26/07207/TCA
T1, T2 and T3 - Bay Laurel reduce height by approx 2-3m from tips and shorten lateral growth by 1m from tips.
Pending
26/07173/FULL
Retention of the existing comfort cooling system and installation of an additional condenser unit within the rear ground floor courtyard to provide comfort cooling to the front area of the shop, including installation on vibration isolation mounts.
Pending

View Planning Timeline

Ownership

Corporate Ownership32.6%
Overseas OwnershipNo
Lease Term Remaining999+ yrs
CovenantsNone
Lease TypeLeasehold
Last Ownership Change2021-10-28
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

18 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£46,690

Population Density22,500 /km²

Owner Occupied25%

Age Distribution

0-15 13%16-64 70%65+ 17%

View Area Profile

Schools Nearby

Marlborough Primary School
0.0 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
St Joseph's Catholic Primary School
0.2 mi
Outstanding
St. Thomas More Language College
0.2 mi
Inspected as Saint Thomas More Language College (URN 100502) on 24 May 2022
Oratory Roman Catholic Primary School
0.2 mi
Outstanding

2 of 5 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Nell Gwynn House Sloane Avenue
-
£500k
-
Nell Gwynn House Sloane Avenue
-
£510k
-
Nell Gwynn House Sloane Avenue
-
£505k
-
Nell Gwynn House Sloane Avenue
-
£650k
-

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