Flat 61, Longleat House, 18 Rampayne Street, London, SW1V 2TQ

UPRN:100022796274Flat/Maisonette0 bedsBuilt 1967-1975

LeaseholdCouncil Tax: Band BEPC: E (45)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 3mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

Flat 61, Longleat House, 18 Rampayne Street, London, SW1V 2TQ

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

19 of 21 sources

Sale Estimate

£314,000

£298k - £330kHigh

Estimate

£314k

Range

£298k – £330k

Rent Estimate (pcm)

£1,550

£1k - £2k

Monthly

£1,550

Yield

5.81%

Verdict

Derived from HomePortfolio scores

Flat 61 earns an INVESTIGATE rating with HP Score 78/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is excellent (97/100). 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

78/ 100

Strong

Investment Score

68/ 100

Moderate

Crime Score

37/ 100

Elevated

Walkability

97/ 100

Excellent

Transit & Bike

Transit 88Bike 74

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceLead to verifyListing checked 11 Nov 2026

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

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 edge0.3/15
claims [AVM -1.9% (HIGH), sold-comps +0.3%, £/sqft +0.4%] → measured edge +0.05pp 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 100022796274· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 16.2%· as of 29 Oct 2026
Rental economics5.7/40
gross yield 5.8%; range width penalty ×0.88
- valuation_snapshotsrent estimate 1550/mo (range 1400-1650)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -341/mo, -22% 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 11 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 191 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 11 Nov 2026
Risk & liquidity14.6/15
170 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

£240,000£368,000

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£320,000

At the asking price

Monthly rent£1,550/mo

Evidenced range £1,400-£1,650

Interest rate5.4%

Loan to value75%

Cash required: £103,300
Net cash flow: -£7/mo
Cash on cash: -0.1%
Score at this price: 21

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.44 - 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 100022796274Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 16.2%Valuation edge · as of 29 Oct 2026
valuation_snapshotsrent estimate 1550/mo (range 1400-1650)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 11 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 11 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 1550/mo (range 1400-1650)
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£314,000

Rent Estimate (pcm)£1,550

Gross Yield5.81%

1y Growth-

3y Growth-3.3%

5y Growth-3.8%

10y Growth-1.8%

Last Sold Price£310,500 (2017-08-21)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0SW1V 2TQ

Approval Rate

-12mo

Development

low

26/07513/ADFULL
Details of Appendix A checklist from the Code of Construction Practice, signed by the applicant and approved by the Council's Environmental Sciences Team; pursuant to condition 3 of planning permission dated 23 December 2024 (24/04744/FULL)
Pending
26/07456/ADFULL
Details of demolition audit to inform what materials could be reused both on or off site pursuant to condition 23 of planning permission dated 13th August 2024 (RN:23/06642/FULL)
Pending
26/07412/FULL
Installation of Automatic Opening Vents as part of essential fire strategy.
Pending

View Planning Timeline

Ownership

Corporate Ownership42.4%
Overseas OwnershipNo
Lease Term Remaining170 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2017-08-21
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

19 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,172

Population Density22,895 /km²

Owner Occupied24%

Age Distribution

0-15 13%16-64 74%65+ 13%

View Area Profile

Schools Nearby

Westminster Under School
0.1 mi
Inspected by ISI
Fairley House School
0.2 mi
Inspected by ISI
Pimlico Academy
0.2 mi
Report card2026
Ofsted no longer awards a single overall grade.
Pimlico Primary
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.

2 of 9 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Longleat House, 18 Rampayne Street
-
£368k
-
Longleat House, 18 Rampayne Street
-
£385k
-
Longleat House, 18 Rampayne Street
-
£311k
-
Longleat House, 18 Rampayne Street
-
£455k
-

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