Flat 6, 3 St Andrew's Square, Surbiton, KT6 4EA

UPRN:100021798166Converted Flat1 bedsBuilt 1900-1929

LeaseholdCouncil Tax: -EPC: D (60)

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

Flat 6, 3 St Andrew's Square, Surbiton, KT6 4EA

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

20 of 21 sources

Sale Estimate

£404,000

£363k - £444kMedium

Estimate

£404k

Range

£363k – £444k

Rent Estimate (pcm)

£1,750

£2k - £2k

Monthly

£1,750

Yield

5.25%

Verdict

Derived from HomePortfolio scores

Flat 6 earns an INVESTIGATE rating with HP Score 84/100. Investment score 67/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (93/100). 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 covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

84/ 100

Strong

Investment Score

67/ 100

Moderate

Crime Score

16/ 100

Moderate

Walkability

93/ 100

Excellent

Transit & Bike

Transit 40Bike 73

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 3 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 +1.0% (MEDIUM)] → 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 (MEDIUM confidence) · snapshot 10 Oct 2026
- valuation_snapshotsestimate for 100021798166· as of 10 Oct 2026
Rental economics1.7/40
gross yield 5.2%; range width penalty ×0.86
- valuation_snapshotsrent estimate 1750/mo (range 1600-1900)· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -591/mo, -34% 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 3 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 61 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
354 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

£300,000£460,000

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£400,000

At the asking price

Monthly rent£1,750/mo

Evidenced range £1,600-£1,900

Interest rate5.4%

Loan to value75%

Cash required: £131,300
Net cash flow: -£138/mo
Cash on cash: -1.3%
Score at this price: 14

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.30 - 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 100021798166Valuation edge · as of 10 Oct 2026
valuation_snapshotsrent estimate 1750/mo (range 1600-1900)Rental economics · as of 10 Oct 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 3 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 3 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth

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 1750/mo (range 1600-1900)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 61 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£404,000

Rent Estimate (pcm)£1,750

Gross Yield5.25%

1y Growth-35.4%

3y Growth-0.1%

5y Growth-0.4%

10y Growth+0.8%

Last Sold Price£635,000 (2025-04-16)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0KT6 4EA

Approval Rate

-12mo

Development

low

26/02273/DTN
Removal of Dead Apple tree
Pending
26/02247/TPO
T1: Horse Chestnut - Raise the lower branches over the public footpath up to 2.5 metres to allow safe passage for pedestrians. Raise the lower branches over the road & traffic lights to achieve a 5.2 metre clearance & 1.5 metre clearance from the traffic lights. Remove basal growth up to 4 metres. 2m clearance from the building to stop squirrels jumping on the roof.
Pending
26/02201/TCA
T1: Ash - Remove major dead wood from throughout the canopy, Reduce the over externded laterals by up to 2.5m to suitable growth points. T2: Ash - Replollard at historic points, Sever ivy at 1m from ground level and clear a 1m section of main stem.
Pending

View Planning Timeline

Ownership

Corporate Ownership58.6%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2025-04-16
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

13 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£41,833

Population Density12,541 /km²

Owner Occupied57%

Age Distribution

0-15 16%16-64 75%65+ 9%

View Area Profile

Schools Nearby

St Andrew's and St Mark's CofE Junior School
0.2 mi
Report card2026
Ofsted no longer awards a single overall grade.
Maple Infants' School
0.2 mi
Good
Surbiton High School
0.5 mi
Inspected by ISI
Lime Tree Primary School
0.5 mi
Good

2 of 6 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

10 St Andrews Square
-
£410k
-
3 St Andrews Square
-
£647k
-
3 St Andrews Square
-
£478k
-
14 St Andrews Square
-
£633k
-

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