Flat 5, 300–302A Old Brompton Road, London, SW5 9JF

UPRN:217061204Flat/Maisonette1 bedsBuilt before 1900

Tenure: -Council Tax: -EPC: C (76)

Data freshness:Listing· freshPrice Paid· freshEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 1mo agoArea· Census 2021

Flat 5, 300–302A Old Brompton Road, London, SW5 9JF

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

£524,000

£471k - £576kMedium

Estimate

£524k

Range

£471k – £576k

Rent Estimate (pcm)

£2,100

£2k - £2k

Monthly

£2,100

Yield

4.20%

Verdict

Derived from HomePortfolio scores

Flat 5 earns an INVESTIGATE rating with HP Score 83/100. Investment score 71/100 reflects strong 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. 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)Defra 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

83/ 100

Strong

Investment Score

71/ 100

High

Crime Score

18/ 100

Moderate

Walkability

99/ 100

Excellent

Transit & Bike

Transit 73Bike 75

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 3 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 edge-0.6/15
claims [AVM -14.5% (MEDIUM), sold-comps -22.7%, £/sqft -22.7%] → measured edge -0.12pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp; asking more than 10% above the estimate (measured -0.33pp)
Market estimate used (MEDIUM confidence) · snapshot 28 Oct 2026
- valuation_snapshotsestimate for 217061204· as of 28 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 19.5%· as of 23 Oct 2026
Rental economics0/40
gross yield 4.2%; range width penalty ×0.82
- valuation_snapshotsrent estimate 2100/mo (range 1900-2300)· as of 28 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,118/mo, -53% 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 3 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 238 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 3 Nov 2026
Risk & liquidity12.8/15
115 sales/12mo in area; valuation range width 20%
- 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

£450,000£690,000

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£600,000

At the asking price

Monthly rent£2,100/mo

Evidenced range £1,900-£2,300

Interest rate5.4%

Loan to value75%

Cash required: £201,300
Net cash flow: -£571/mo
Cash on cash: -3.4%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.04 - below 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 217061204Valuation edge · as of 28 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 19.5%Valuation edge · as of 23 Oct 2026
valuation_snapshotsrent estimate 2100/mo (range 1900-2300)Rental economics · as of 28 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 3 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 3 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 2100/mo (range 1900-2300)
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. 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£524,000

Rent Estimate (pcm)£2,100

Gross Yield4.20%

1y Growth-

3y Growth-3.6%

5y Growth+0.0%

10y Growth-0.7%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseHigh

View Full Risk Report

Planning Activity

Recent Apps

-SW5 9JF

Approval Rate

-12mo

Development

P/2026/02845/TPO
Pruning of 7no London Plane Trees, subject to Tree Preservation Order TPO/92/4/83 (T1, T2, T3, T4, T5, T6 and T7), by reducing crowns to most recent reduction points.
Pending
P/2026/02786/DET
Submission of details of all external materials to be used in the faces and roofs of the development (including physical material samples), pursuant to Condition 3; details in plan, section and elevation (at a scale of not less than 1:20) of the following: exterior cladding and roofing, new and replacement window details, gates and railings, and rooftop plant associated enclosures, pursuant to Condition 4; details of a statement of how 'Secured by Design' requirements are to be adequately achieved; pursuant to Condition 14; details of how the structure of the basement will be waterproofed (such as the provision of a cavity membrane and sump/pump system as part of the waterproofing measures for the basement), pursuant to Condition 17; details of a scheme for temporary solid timber hoarded fencing (minimum height 2.5 metres) around the perimeter of the site on all site boundaries and/or enclosure of the site, pursuant to Condition 18; details of an Air Quality Dust Management Plan (AQDM... read more
Pending
P/2026/02777/DET
Submission of details pursuant to Condition 19 (installation of air source heat pumps), and Condition 25 (privacy screens) of planning permission reference: 2024/00747/FUL granted 6th March 2025.
Pending

View Planning Timeline