31 Castle Road, Southsea, PO5 3DE

UPRN:1775010890End Terrace HouseBeds -Built 1900-1929

Tenure: -Council Tax: Band EEPC: D (56)

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

HP Score

/ 100

Strong

Verdict

3 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£642,000

£578k - £706kMedium

Estimate

£642k

Range

£578k – £706k

Rent Estimate (pcm)

£3,900

£4k - £4k

Monthly

£3,900

Yield

8.14%

Verdict

Derived from HomePortfolio scores

31 Castle Road earns an INVESTIGATE rating with HP Score 76/100. Investment score 59/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (92/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. 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)Defra strategic noise mapping, England Round 4 (Contains Defra data © Crown copyright and database right 2023-2024, Open Government Licence v3.0)Walk ScoreONS 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

76/ 100

Strong

Investment Score

59/ 100

Moderate

Crime Score

31/ 100

Moderate

Walkability

92/ 100

Excellent

Transit & Bike

Transit 32Bike 75

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Reduced confidence2 independent sourcesListing checked 5 Nov 2026

Fewer independent sources agree, or a component could not be scored.

Valuation edge0/15
claims [AVM +10.4% (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 13 Oct 2026
- valuation_snapshotsestimate for 1775010890· as of 13 Oct 2026
Rental economics23.7/40
gross yield 8.1%; range width penalty ×0.94
- valuation_snapshotsrent estimate 3900/mo (range 3650-4150)· as of 13 Oct 2026· verify before relying on this
Stress margin8/30
stressed cash flow +311/mo, +8% 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 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 & liquidity12.9/15
243 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 £460,000

£431,000£661,000

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£575,000

At the asking price

Monthly rent£3,900/mo

Evidenced range £3,650-£4,150

Interest rate5.4%

Loan to value75%

Cash required: £192,550
Net cash flow: £759/mo
Cash on cash: 4.7%
Score at this price: 45

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 2.01 - 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 1775010890Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 3900/mo (range 3650-4150)Rental economics · as of 13 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
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth

Risks

What could kill this deal

Score confidence is reduced
fewer independent sources agree, or a component could not be scored
Rental economics needs verification before you rely on it
rent estimate 3900/mo (range 3650-4150)
Seller motivation could not be 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

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. Set your walk-away price before viewing - above £460,000 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£642,000

Rent Estimate (pcm)£3,900

Gross Yield8.14%

1y Growth-

3y Growth+0.7%

5y Growth+1.9%

10y Growth+3.2%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0PO5 3DE

Approval Rate

-12mo

Development

low

26/00484/CPE
Application for Certificate of Lawful Development for existing use as four residential apartments
Pending
26/00469/FUL
Construction of rear extension at ground floor level to create one additional apartment, including relocation of refuse and cycle storage and provision of ground floor balconies and first floor terrace.
Pending
26/00460/FUL
Removal of dated PVC 1960s extension (circa. 8m2) to the rear of a Grade II listed Victorian building and replace with a timber verandah and door set, creating balcony space to the rear.
Pending

View Planning Timeline