8 Walnut Close, Harpenden, AL5 4FP

UPRN:10096006820-4 bedsBuilt -

FreeholdCouncil Tax: -EPC: -

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

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

15 of 21 sources

Sale Estimate

£1,462,000

£1.39M - £1.53MHigh

Estimate

£1.46M

Range

£1.39M – £1.53M

Rent Estimate (pcm)

£4,650

£4k - £5k

Monthly

£4,650

Yield

3.72%

Verdict

Derived from HomePortfolio scores

8 Walnut Close earns an INVESTIGATE rating with HP Score 75/100. Investment score 56/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is limited (58/100). 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 SourcesPortal listingsMarket 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 Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

75/ 100

Strong

Investment Score

56/ 100

Moderate

Crime Score

11/ 100

Low

Walkability

58/ 100

Moderate

Transit & Bike

Transit 25Bike 53

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 4 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 -2.6% (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 9 Nov 2026
- valuation_snapshotsestimate for 10096006820· as of 9 Nov 2026
Rental economics0/40
gross yield 3.7%; range width penalty ×0.71
- valuation_snapshotsrent estimate 4650/mo (range 4050-5200)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -3,040/mo, -65% 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 4 Nov 2026
Seller motivationNot scored
context, not scored: 1 price cut(s), 53 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 4 Nov 2026
Risk & liquidity14.6/15
303 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

£1,125,000£1,725,000

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£1,500,000

At the asking price

Monthly rent£4,650/mo

Evidenced range £4,050-£5,200

Interest rate5.4%

Loan to value75%

Cash required: £545,050
Net cash flow: -£1,843/mo
Cash on cash: -4.1%
Score at this price: 15

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.92 - below 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 10096006820Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 4650/mo (range 4050-5200)Rental economics · as of 9 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 Nov 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 4650/mo (range 4050-5200)
Seller motivation could not be scored
context, not scored: 1 price cut(s), 53 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. 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£1,462,000

Rent Estimate (pcm)£4,650

Gross Yield3.72%

1y Growth-

3y Growth-1.1%

5y Growth+2.0%

10y Growth+2.8%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonModerate
MiningSignificant
LandslideLow
Air QualityLow
NoiseBelow 40 dB

View Full Risk Report

Planning Activity

Recent Apps

0AL5 4FP

Approval Rate

-12mo

Development

low

TP/2026/0474
Dead Ash tree at the rear on the left side of the back garden.Fell to ground level Diseased Acacia tree, Fell to ground level and grind out stump.
Pending
5/2026/1705
Construction of a single-storey front extension incorporating a new pitched roof with rooflights, new entrance door with glazed sidelights, and alterations to the external appearance of the front elevation including a rendered finish
Pending
5/2026/1702
Alterations to the fenestration.
Pending

View Planning Timeline

Ownership

Corporate Ownership55%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (-)

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£45,543

Population Density2,888 /km²

Owner Occupied77%

Age Distribution

0-15 27%16-64 59%65+ 14%

View Area Profile

Schools Nearby

Sir John Lawes School
0.1 mi
Outstanding
Manland Primary School
0.1 mi
GoodImproving
St George's School
0.3 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Crabtree Junior School
0.5 mi
Outstanding

7 of 11 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

5 Walnut Close
-
£1.75M
-
5 Walnut Close
-
£1.55M
-
6 Walnut Close
-
£1.70M
-
3 Walnut Close
-
£1.60M
-

Boundary data not available for this property

No registered title polygon, building footprint, or street match for this property yet.

Why: No HMLR INSPIRE / OSM footprint / OS Open USRN match for this UPRN

Source: HM Land Registry INSPIRE / OpenStreetMap / OS Open USRN