Basement Flat, 12 Lennox Gardens, London, SW1X 0DG

UPRN:217053000Flat/Maisonette1 bedsBuilt before 1900

Tenure: -Council Tax: -EPC: D (66)

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

Basement Flat, 12 Lennox Gardens, London, SW1X 0DG

HP Score

/ 100

Strong

Verdict

today

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

Evidence

20 of 21 sources

Sale Estimate

£1,544,000

£1.24M - £1.85MLow

Estimate

£1.54M

Range

£1.24M – £1.85M

Rent Estimate (pcm)

£6,550

£6k - £7k

Monthly

£6,550

Yield

8.50%

Verdict

Derived from HomePortfolio scores

Basement Flat earns an INVESTIGATE rating with HP Score 79/100. Investment score 66/100 reflects moderate fundamentals. Crime intensity is low. Walkability is good (75/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. 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

79/ 100

Strong

Investment Score

66/ 100

Moderate

Crime Score

19/ 100

Moderate

Walkability

75/ 100

High

Transit & Bike

Transit 71Bike 65

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

headline score requires valuation_edge (estimate confidence LOW below scoring floor)

What we could establish

Rental economics23.3/40
gross yield 8.5%; range width penalty ×0.83; the estimate this rent rides on sits 40% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 6550/mo (range 5950-7150)· as of 10 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 40% above the ask on the same snapshot - verify the rent describes this home· as of 10 Oct 2026· verify before relying on this
Stress margin11.9/30
stressed cash flow +782/mo, +12% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); passes the stress; 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
Risk & liquidity9.2/15
52 sales/12mo in area; valuation range width 40%
- property_intelligencetransactions_12mo

Withholding a score is deliberate. A number built on missing or stale inputs would look more certain than the evidence allows.

Economics

What happens to your money

Your assumptions

Purchase price£925,000

At the asking price

Monthly rent£6,550/mo

Evidenced range £5,950-£7,150

Interest rate5.4%

Loan to value75%

Cash required: £315,050
Net cash flow: £1,413/mo
Cash on cash: 5.4%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 2.10 - 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_snapshotsrent estimate 6550/mo (range 5950-7150)Rental economics · as of 10 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 40% above the ask on the same snapshot - verify the rent describes this homeRental economics · as of 10 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
property_intelligencetransactions_12mo

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Valuation edge could not be scored
estimate confidence LOW below scoring floor
Rental economics needs verification before you rely on it
rent estimate 6550/mo (range 5950-7150)

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The market estimate this rent rides on sits far above the asking price, so the rent may describe a different home.
2. Fill the valuation edge gap before relying on the score.
estimate confidence LOW below scoring floor
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£1,544,000

Rent Estimate (pcm)£6,550

Gross Yield8.50%

1y Growth+29.8%

3y Growth+6.5%

5y Growth+8.8%

10y Growth+3.3%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SW1X 0DG

Approval Rate

-12mo

Development

low

26/07272/LBC
Installation of 1 temporary structures (marquee) on the gravelled terrace above basement level. (Linked with 26/07271/FULL)
Pending
26/07271/FULL
Installation of temporary marquee structure on the gravelled terrace above basement level.
Pending
26/07236/ADLBC
details of the proposed paving materials either side the length of the wall to be replaced, including photographs of the existing paving (taken before the works begin) and photographs of samples of the paving to be reinstated or newly laid, along with plan drawings showing what paving materials will be used where and the proposed render to be used on the new wall, including specifics of its finished colour and photographs of samples pursuant to condition 3 of listed building dated 19th March 2026 (RN:25/09235/LBC )
Pending

View Planning Timeline