3 Longfield, Hemel Hempstead, HP3 8HN

UPRN:100080697143Detached House4 bedsBuilt 1967-1975

FreeholdCouncil Tax: Band FEPC: D (63)

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

HP Score

/ 100

Strong

Verdict

today

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

Evidence

17 of 21 sources

Sale Estimate

£824,000

£782k - £865kHigh

Estimate

£824k

Range

£782k – £865k

Rent Estimate (pcm)

£3,300

£3k - £4k

Monthly

£3,300

Yield

4.95%

Verdict

Derived from HomePortfolio scores

3 Longfield earns an INVESTIGATE rating with HP Score 78/100. Investment score 60/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is limited (57/100). 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 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 covenantsHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

78/ 100

Strong

Investment Score

60/ 100

Moderate

Crime Score

3/ 100

Low

Walkability

57/ 100

Moderate

Transit & Bike

Transit 18Bike 38

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 10 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 +2.9% (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 100080697143· as of 9 Nov 2026
Rental economics0/40
gross yield 5.0%; range width penalty ×0.81
- valuation_snapshotsrent estimate 3300/mo (range 2950-3600)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,080/mo, -33% 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 10 Nov 2026
Seller motivationNot scored
no listing-history inputs (first published date, price changes)
Risk & liquidity14.6/15
283 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

£600,000£920,000

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£800,000

At the asking price

Monthly rent£3,300/mo

Evidenced range £2,950-£3,600

Interest rate5.4%

Loan to value75%

Cash required: £271,300
Net cash flow: -£415/mo
Cash on cash: -1.8%
Score at this price: 15

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.22 - 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 100080697143Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 3300/mo (range 2950-3600)Rental economics · as of 9 Nov 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 10 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth Valuation methodology

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 3300/mo (range 2950-3600)
Seller motivation could not be scored
no listing-history inputs (first published date, price changes)

Property risk deep-dive →flood, subsidence, crime, environment - the full domain

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. 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£824,000

Rent Estimate (pcm)£3,300

Gross Yield4.95%

1y Growth-

3y Growth+3.2%

5y Growth+1.9%

10y Growth+2.9%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonModerate
MiningSignificant
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0HP3 8HN

Approval Rate

-12mo

Development

low

26/02407/FUL
Partially retrospective application for the construction of a padel facility
Pending
26/02291/FUL
Installation of 2 no. padel courts with canopy
Pending
26/02290/FHA
Removal of existing hedge and installation of fence.
Pending

View Planning Timeline

Ownership

Corporate Ownership60.3%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change-
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

5 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,473

Population Density-

Owner Occupied95%

Age Distribution

0-15 15%16-64 53%65+ 32%

View Area Profile

Schools Nearby

Hobbs Hill Wood Primary School
0.2 mi
Good
Saint Albert the Great Catholic Primary School, a Voluntary Academy
0.2 mi
Area grades2025
Inspected after Ofsted withdrew the single overall grade.
Woodfield School
0.3 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
Longdean School
0.3 mi
Inspected as Longdean School (URN 117523) on 26 Jan 2010

3 of 12 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

9 Longfield
-
£525k
-
5 Longfield
-
£628k
-
21 Longfield
-
£575k
-
17 Longfield
-
£400k
-

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