Flat B2, 20 St Mark's Hill, Surbiton, KT6 4PT

UPRN:128017734Converted Flat1 bedsBuilt before 1900

LeaseholdCouncil Tax: -EPC: D (67)

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

Flat B2, 20 St Mark's Hill, Surbiton, KT6 4PT

HP Score

/ 100

Mixed

Verdict

today

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

20 of 21 sources

Sale Estimate

£276,000

£248k - £303kMedium

Estimate

£276k

Range

£248k – £303k

Rent Estimate (pcm)

£1,200

£1k - £1k

Monthly

£1,200

Yield

6.40%

Verdict

Derived from HomePortfolio scores

Flat B2 earns an INVESTIGATE rating with HP Score 63/100. Investment score 67/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is excellent (92/100). 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

63/ 100

Mixed

Investment Score

67/ 100

Moderate

Crime Score

96/ 100

Elevated

Walkability

92/ 100

Excellent

Transit & Bike

Transit 70Bike 71

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: the estimate sits 18% above the ask; lead to verify: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM +18.5% (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 12 Oct 2026
- valuation_snapshotsestimate for 128017734· as of 12 Oct 2026
Rental economics9.7/40
gross yield 6.4%; range width penalty ×0.87; the estimate this rent rides on sits 18% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 1200/mo (range 1100-1300)· as of 12 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 18% above the ask on the same snapshot - verify the rent describes this home· as of 12 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -197/mo, -16% 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), 64 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 & liquidity12.9/15
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

£169,000£258,500

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£225,000

At the asking price

Monthly rent£1,200/mo

Evidenced range £1,100-£1,300

Interest rate5.4%

Loan to value75%

Cash required: £70,800
Net cash flow: £71/mo
Cash on cash: 1.2%
Score at this price: 23

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.58 - 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 128017734Valuation edge · as of 12 Oct 2026
valuation_snapshotsrent estimate 1200/mo (range 1100-1300)Rental economics · as of 12 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 18% above the ask on the same snapshot - verify the rent describes this homeRental economics · as of 12 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_date

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 1200/mo (range 1100-1300)
Rental economics needs verification before you rely on it
sale estimate 18% above the ask on the same snapshot - verify the rent describes this home

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. 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£276,000

Rent Estimate (pcm)£1,200

Gross Yield6.40%

1y Growth-

3y Growth-0.1%

5y Growth-0.4%

10y Growth+0.8%

Last Sold Price£171,050 (2007-12-20)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0KT6 4PT

Approval Rate

-12mo

Development

low

26/02309/NMA
Application for a Non-Material Amendment to Planning Permission ref: 25/01574/FUL (Change of use from care home (Use Class C2) to a large House in Multiple Occupation (HMO) providing specialist supported accommodation for vulnerable individuals (Use Class Sui Generis), including associated external alterations, changes to fenestration, provision of refuse storage, vehicle and cycle parking, landscaping and plant). Amendment to relocate the refuse and recycling store.
Pending
26/02293/TCA
T1540: (Goat Willow) - Pollard - Previous pollard height.
Pending
26/02290/TCA
T2: Yew - Cut back to fence line on No. 5 side
Pending

View Planning Timeline

Ownership

Corporate Ownership58.6%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2007-12-20
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

18 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£41,833

Population Density8,917 /km²

Owner Occupied33%

Age Distribution

0-15 11%16-64 77%65+ 12%

View Area Profile

Schools Nearby

Maple Infants' School
0.2 mi
Good
St Andrew's and St Mark's CofE Junior School
0.2 mi
Report card2026
Ofsted no longer awards a single overall grade.
The Hollyfield School and Sixth Form Centre
0.2 mi
Inspected as The Hollyfield School and Sixth Form Centre (URN 102600) on 11 May 2011
Lime Tree Primary School
0.3 mi
Good

1 of 7 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

20 St Marks Hill
-
£360k
-
20D St Marks Hill
-
£249k
-
20C St Marks Hill
-
£320k
-
22 St Marks Hill
-
£2.72M
-

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