9 Napier Street, Mountain Ash, CF45 3HW

UPRN:100100712829TerracedBeds -Built 1900-1929

FreeholdCouncil Tax: Band AEPC: D (59)

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

HP Score

/ 100

Strong

Verdict

4 days ago

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

Evidence

16 of 21 sources

Sale Estimate

£125,000

£112k - £137kMedium

Estimate

£125k

Range

£112k – £137k

Rent Estimate (pcm)

£950

£900 - £1k

Monthly

£950

Yield

11.40%

Verdict

Derived from HomePortfolio scores

9 Napier Street earns an INVESTIGATE rating with HP Score 81/100. Investment score 70/100 reflects moderate fundamentals. Crime intensity is very low. Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is freehold. 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 Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

81/ 100

Strong

Investment Score

70/ 100

Moderate

Crime Score

14/ 100

Low

Walkability

No data

Transit & Bike

No data

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 30 Oct 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 20% above the ask. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM +20.0% (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 100100712829· as of 10 Oct 2026
Rental economics39.6/40
gross yield 11.4%; range width penalty ×0.99; the estimate this rent rides on sits 20% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 950/mo (range 900-1000)· as of 10 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 20% above the ask on the same snapshot - verify the rent describes this home· as of 10 Oct 2026· verify before relying on this
Stress margin15.4/30
stressed cash flow +146/mo, +15% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); passes the stress
- underwriting_assumptionscosts not disclosed by the advert· as of 30 Oct 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 78 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 & liquidity12.8/15
207 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 sensitivityScores 70+ up to £95,000

£75,000£115,000

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£100,000

At the asking price

Monthly rent£950/mo

Evidenced range £900-£1,000

Interest rate5.4%

Loan to value75%

Cash required: £31,300
Net cash flow: £320/mo
Cash on cash: 12.3%
Score at this price: 68

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 2.81 - 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 100100712829Valuation edge · as of 10 Oct 2026
valuation_snapshotsrent estimate 950/mo (range 900-1000)Rental economics · as of 10 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 20% above the ask on the same snapshot - verify the rent describes this homeRental 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

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 950/mo (range 900-1000)
Rental economics needs verification before you rely on it
sale estimate 20% 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. Set your walk-away price before viewing - above £95,000 the deal stops scoring well.
Computed by re-running the score at higher prices.
3. 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.
4. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Valuation & Market

Sale Estimate£125,000

Rent Estimate (pcm)£950

Gross Yield11.40%

1y Growth+51.4%

3y Growth+6.3%

5y Growth+6.8%

10y Growth+5.6%

Last Sold Price£29,000 (2000-01-20)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonModerate
MiningUnknown
LandslideSignificant
Air QualityLow
NoiseWithheld

View Full Risk Report

Planning Activity

Recent Apps

0CF45 3HW

Approval Rate

-12mo

Development

low

26/0886/FUL
First storey rear extension.
Pending
26/0844/FUL
Retrospective planning application for the retention of an InPost Parcel Locker
Pending
26/0680/FUL
Proposed Single-storey Rear Extension
Approved

View Planning Timeline