21 Heol Cwarrel Clark, Caerphilly, CF83 2NE

UPRN:43079884Detached House4 bedsBuilt 1996-2002

FreeholdCouncil Tax: -EPC: C (72)

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

21 Heol Cwarrel Clark, Caerphilly, CF83 2NE

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

16 of 21 sources

Sale Estimate

£400,000

£380k - £420kHigh

Estimate

£400k

Range

£380k – £420k

Rent Estimate (pcm)

£1,800

£2k - £2k

Monthly

£1,800

Yield

5.40%

Verdict

Derived from HomePortfolio scores

21 Heol Cwarrel Clark earns an INVESTIGATE rating with HP Score 81/100. Investment score 70/100 reflects strong fundamentals. Crime intensity is 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 covenantsHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

81/ 100

Strong

Investment Score

70/ 100

High

Crime Score

16/ 100

Moderate

Walkability

No data

Transit & Bike

No data

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 2 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 +0.0% (HIGH), sold-comps -16.6%, £/sqft -16.5%] → 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 43079884· as of 12 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 7 comps, dispersion 16.4%· as of 29 Oct 2026
Rental economics2.8/40
gross yield 5.4%; range width penalty ×0.87
- valuation_snapshotsrent estimate 1800/mo (range 1650-1950)· as of 12 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -494/mo, -27% 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 2 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 176 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 2 Nov 2026
Risk & liquidity14.6/15
552 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

£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£1,800/mo

Evidenced range £1,650-£1,950

Interest rate5.4%

Loan to value75%

Cash required: £131,300
Net cash flow: -£104/mo
Cash on cash: -0.9%
Score at this price: 17

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.33 - 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 43079884Valuation edge · as of 12 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 7 comps, dispersion 16.4%Valuation edge · as of 29 Oct 2026
valuation_snapshotsrent estimate 1800/mo (range 1650-1950)Rental economics · as of 12 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 2 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 2 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 1800/mo (range 1650-1950)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 176 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. Ask the agent why the price was reduced and whether a previous sale fell through.
1 price cut(s) recorded on the listing history.
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£400,000

Rent Estimate (pcm)£1,800

Gross Yield5.40%

1y Growth-

3y Growth+3.9%

5y Growth+5.6%

10y Growth+4.8%

Last Sold Price£280,000 (2020-06-15)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonModerate
MiningUnknown
LandslideModerate
Air QualityLow
NoiseWithheld

View Full Risk Report

Planning Activity

Recent Apps

1CF83 2NE

Approval Rate

0%12mo

Development

low

26/0625/NCC
Vary condition 01 (time to commence dev) of planning consent 21/1038/FULL to extend the time limit for a further 5 year period
Pending
26/0611/CLPU
Obtain a Lawful Development Certificate for conversion of the existing integral garage into habitable accommodation, replacement of the garage door with a window, associated internal alterations and installation of a compact through-floor lift
Rejected
26/0478/HH
Demolish existing garage and erect a two storey side extension
Rejected

View Planning Timeline