Flat 27, 11 Robsart Street, London, SW9 0AE

UPRN:10023853394Purpose Built Flat2 bedsBuilt 2007-2011

LeaseholdCouncil Tax: Band DEPC: C (77)

Data freshness:Listing· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· freshAmenities· 2mo agoArea· Census 2021

Flat 27, 11 Robsart Street, London, SW9 0AE

HP Score

/ 100

Strong

Verdict

3 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£512,000

£487k - £538kHigh

Estimate

£512k

Range

£487k – £538k

Rent Estimate (pcm)

£2,600

£2k - £3k

Monthly

£2,600

Yield

6.93%

Verdict

Derived from HomePortfolio scores

Flat 27 earns an INVESTIGATE rating with HP Score 76/100. Investment score 70/100 reflects strong fundamentals. Crime intensity is moderate. Walkability is excellent (94/100). 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

76/ 100

Strong

Investment Score

70/ 100

High

Crime Score

43/ 100

Elevated

Walkability

94/ 100

Excellent

Transit & Bike

Transit 74Bike 77

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 5 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 +12.1% (HIGH), sold-comps -2.0%, £/sqft -2.1%] → 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 10023853394· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 9.3%· as of 19 Oct 2026
Rental economics13.8/40
gross yield 6.9%; range width penalty ×0.89
- valuation_snapshotsrent estimate 2600/mo (range 2400-2800)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -138/mo, -5% 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 5 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 31 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 5 Nov 2026
Risk & liquidity14.6/15
311 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

£337,500£517,500

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£450,000

At the asking price

Monthly rent£2,600/mo

Evidenced range £2,400-£2,800

Interest rate5.4%

Loan to value75%

Cash required: £148,800
Net cash flow: £281/mo
Cash on cash: 2.3%
Score at this price: 28

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.71 - 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 10023853394Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 9.3%Valuation edge · as of 19 Oct 2026
valuation_snapshotsrent estimate 2600/mo (range 2400-2800)Rental economics · as of 13 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 5 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 5 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 2400-2800)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 31 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. 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£512,000

Rent Estimate (pcm)£2,600

Gross Yield6.93%

1y Growth+1.2%

3y Growth-0.2%

5y Growth-0.8%

10y Growth+0.4%

Last Sold Price£510,000 (2025-01-27)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0SW9 0AE

Approval Rate

-12mo

Development

low

26/03247/DET
Approval of details pursuant to Condition 6 (Green Roof) of planning permission 25/03543/FUL (Erection of 2 storey rear extension to Block B, erection of single storey link between Block A and Block B, reconfiguration of cycle and bin stores and landscaping works.)
Pending
26/03217/FUL
Erection of a single storey side extension including rooflights, increased door size to the rear elevation, replacement windows on a like-for-like basis, and reinstatement of the lower ground floor side door under the entrance steps to the front elevation (to provide direct access to the outside).
Pending
26/03197/FUL
Replacement of a rear door with a like-for-like timber french door featuring a traditional six panel configuration (Please note: The reference number for this Listed Building Consent application is 26/03198/LB but there is also an associated application for Full Planning Permission related to these works with reference number: 26/03197/FUL)
Pending

View Planning Timeline