19 Southerndown Avenue, Mayals, Swansea, SA3 5EL

UPRN:100101007972Detached House4 bedsBuilt 1976-1982

FreeholdCouncil Tax: -EPC: D (66)

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

19 Southerndown Avenue, Mayals, Swansea, SA3 5EL

HP Score

/ 100

Strong

Verdict

4 days ago

Verdict: AVOID, on a scale of Buy, Investigate, Avoid.
Significant risk factors

Evidence

16 of 21 sources

Sale Estimate

£410,000

£390k - £431kHigh

Estimate

£410k

Range

£390k – £431k

Rent Estimate (pcm)

£1,400

£1k - £2k

Monthly

£1,400

Yield

5.60%

Verdict

Derived from HomePortfolio scores

19 Southerndown Avenue earns an AVOID rating with HP Score 84/100. Investment score 60/100 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)ONS Census 2021Police.ukHM Land Registry covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

84/ 100

Strong

Investment Score

60/ 100

Moderate

Crime Score

3/ 100

Low

Walkability

No data

Transit & Bike

No data

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 5 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 27% above the ask. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM +26.8% (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 100101007972· as of 10 Oct 2026
Rental economics3.7/40
gross yield 5.6%; range width penalty ×0.77; the estimate this rent rides on sits 27% above the ask - check the rent describes the advertised home
- valuation_snapshotsrent estimate 1400/mo (range 1250-1550)· as of 10 Oct 2026· verify before relying on this
- valuation_snapshotssale estimate 27% above the ask on the same snapshot - verify the rent describes this home· as of 10 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -367/mo, -26% 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 5 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 52 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 5 Nov 2026
Risk & liquidity14.6/15
273 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

£225,000£345,000

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£300,000

At the asking price

Monthly rent£1,400/mo

Evidenced range £1,250-£1,550

Interest rate5.4%

Loan to value75%

Cash required: £96,300
Net cash flow: -£43/mo
Cash on cash: -0.5%
Score at this price: 18

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.38 - 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 100101007972Valuation edge · as of 10 Oct 2026
valuation_snapshotsrent estimate 1400/mo (range 1250-1550)Rental economics · as of 10 Oct 2026 · verify before relying on this
valuation_snapshotssale estimate 27% 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 5 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 5 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 1400/mo (range 1250-1550)
Rental economics needs verification before you rely on it
sale estimate 27% 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£410,000

Rent Estimate (pcm)£1,400

Gross Yield5.60%

1y Growth+69.2%

3y Growth+0.3%

5y Growth+2.1%

10y Growth+3.6%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonLow
MiningLow
LandslideModerate
Air QualityLow
NoiseWithheld

View Full Risk Report

Planning Activity

Recent Apps

0SA3 5EL

Approval Rate

-12mo

Development

low

2026/1776/TPO
To fell 1 Oak tree covered by TPO 530
Pending
2026/1719/FUL
Part two storey and part single storey and rear extension
Pending
2026/1645/PLD
Detached outbuilding (application for a Certificate of Proposed Lawful Development)
Approved

View Planning Timeline