18 Wentloog Close, Rumney, Cardiff, CF3 3HA

UPRN:100100108772Purpose Built Flat2 bedsBuilt 1950-1966

LeaseholdCouncil Tax: Band CEPC: E (49)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· 1mo agoEPC· 6mo agoRisk· 2y agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

18 Wentloog Close, Rumney, Cardiff, CF3 3HA

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

18 of 21 sources

Sale Estimate

£156,000

£148k - £164kHigh

Estimate

£156k

Range

£148k – £164k

Rent Estimate (pcm)

£900

£850 - £950

Monthly

£900

Yield

6.35%

Verdict

Derived from HomePortfolio scores

18 Wentloog Close earns an INVESTIGATE rating with HP Score 74/100. Investment score 65/100 reflects moderate fundamentals. Crime intensity is low. 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 addressONS 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

74/ 100

Mixed

Investment Score

65/ 100

Moderate

Crime Score

25/ 100

Moderate

Walkability

No data

Transit & Bike

No data

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 10 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 edge0/15
claims [AVM -9.0% (HIGH), sold-comps -40.5%, £/sqft -40.7%] → 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 12 Oct 2026
- valuation_snapshotsestimate for 100100108772· as of 12 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 24.1%· as of 7 Nov 2026
Rental economics10.6/40
gross yield 6.4%; range width penalty ×0.98
- valuation_snapshotsrent estimate 900/mo (range 850-950)· as of 12 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -186/mo, -21% 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 10 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 85 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 10 Nov 2026
Risk & liquidity14.6/15
404 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

£127,500£195,500

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£170,000

At the asking price

Monthly rent£900/mo

Evidenced range £850-£950

Interest rate5.4%

Loan to value75%

Cash required: £53,200
Net cash flow: £49/mo
Cash on cash: 1.1%
Score at this price: 25

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.57 - 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 100100108772Valuation edge · as of 12 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 24.1%Valuation edge · as of 7 Nov 2026
valuation_snapshotsrent estimate 900/mo (range 850-950)Rental economics · as of 12 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 10 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 10 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 900/mo (range 850-950)
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£156,000

Rent Estimate (pcm)£900

Gross Yield6.35%

1y Growth+2.0%

3y Growth+0.6%

5y Growth+3.0%

10y Growth+5.3%

Last Sold Price£150,000 (2025-06-06)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonModerate
MiningLow
LandslideModerate
Air QualityLow
NoiseWithheld

View Full Risk Report

Planning Activity

Recent Apps

0CF3 3HA

Approval Rate

-12mo

Development

low

26/02268/HSE
Proposed single storey rear extension, Proposed front porch. Internal alterations.
Pending
26/02111/FUL
Change of Use of Units 22-25, from Sui Generis Dog Day Care Facility to Class B1/B2/B8 Employment Use
Pending
26/01803/FUL
Proposed external alterations to 'Juniper Studio' building
Approved

View Planning Timeline