8 Cefn Mably House, Cefn Mably Park, Michaelston-y-Fedw, Cardiff, CF3 6AA

UPRN:43079504Flat/Maisonette2 bedsBuilt 1996-2002

LeaseholdCouncil Tax: -EPC: E (40)

Data freshness:Listing· freshPrice Paid· freshPlanning· 5mo agoEPC· 6mo agoRisk· 2y agoConnectivity· 1mo agoSchools· 4mo agoAmenities· 1mo agoArea· Census 2021

8 Cefn Mably House, Cefn Mably Park, Michaelston-y-Fedw, Cardiff, CF3 6AA

HP Score

/ 100

Mixed

Verdict

4 days ago

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

Evidence

17 of 21 sources

Sale Estimate

£634,000

£603k - £666kHigh

Estimate

£634k

Range

£603k – £666k

Rent Estimate (pcm)

£3,700

£3k - £4k

Monthly

£3,700

Yield

6.94%

Verdict

Derived from HomePortfolio scores

8 Cefn Mably House earns an INVESTIGATE rating with HP Score 71/100. Investment score 61/100 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 NationsMarket 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

71/ 100

Mixed

Investment Score

61/ 100

Moderate

Crime Score

29/ 100

Moderate

Walkability

No data

Transit & Bike

No data

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 30 Oct 2026

This rests largely on a single source. Treat the score as a prompt to investigate, not a conclusion.

Valuation edge0/15
claims [AVM -0.9% (HIGH)] → 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 10 Oct 2026
- valuation_snapshotsestimate for 43079504· as of 10 Oct 2026
Rental economics14.8/40
gross yield 6.9%; range width penalty ×0.96
- valuation_snapshotsrent estimate 3700/mo (range 3450-3900)· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -111/mo, -3% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 30 Oct 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 150 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 30 Oct 2026
Risk & liquidity14.7/15
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

£480,000£736,000

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£640,000

At the asking price

Monthly rent£3,700/mo

Evidenced range £3,450-£3,900

Interest rate5.4%

Loan to value75%

Cash required: £215,300
Net cash flow: £402/mo
Cash on cash: 2.2%
Score at this price: 30

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 43079504Valuation edge · as of 10 Oct 2026
valuation_snapshotsrent estimate 3700/mo (range 3450-3900)Rental economics · as of 10 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 30 Oct 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 30 Oct 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 3700/mo (range 3450-3900)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 150 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. 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£634,000

Rent Estimate (pcm)£3,700

Gross Yield6.94%

1y Growth-

3y Growth+0.6%

5y Growth+3.0%

10y Growth+5.3%

Last Sold Price£355,000 (2006-03-22)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonModerate
MiningLow
LandslideModerate
Air QualityLow
NoiseWithheld

View Full Risk Report

Planning Activity

Recent Apps

0CF3 6AA

Approval Rate

-12mo

Development

low

26/0562
ERECTION OF LEAN-TO BARN
Conditions
26/0338/RET
Retain hard surface area for the purposes of storage of agricultural equipment, hay, straw and other ancillary crops, and storage in relation to Cefn Mably Farm Park
Pending
25/01639/FUL
Retrospective application for a change of use to a self-storage facility (Use Class B8 Storage and Distribution)
Pending

View Planning Timeline