20 Harriet House, London Road, Hemel Hempstead, HP3 9GE

UPRN:10002009643Purpose Built Flat2 bedsBuilt 2003-2006

LeaseholdCouncil Tax: Band DEPC: C (70)

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

20 Harriet House, London Road, Hemel Hempstead, HP3 9GE

HP Score

/ 100

Mixed

Verdict

2 days ago

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

19 of 21 sources

Sale Estimate

£261,000

£248k - £274kHigh

Estimate

£261k

Range

£248k – £274k

Rent Estimate (pcm)

£1,300

£1k - £1k

Monthly

£1,300

Yield

6.00%

Verdict

Derived from HomePortfolio scores

20 Harriet House earns an INVESTIGATE rating with HP Score 73/100. Investment score 67/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (53/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is leasehold. 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 addressDefra 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

73/ 100

Mixed

Investment Score

67/ 100

Moderate

Crime Score

25/ 100

Moderate

Walkability

53/ 100

Moderate

Transit & Bike

Transit 17Bike 32

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceLead to verifyListing checked 3 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: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge1.6/15
claims [AVM +0.4% (HIGH), sold-comps +1.9%, £/sqft +2.0%] → measured edge +0.31pp 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 Oct 2026
- valuation_snapshotsestimate for 10002009643· as of 9 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 14.4%· as of 4 Nov 2026
Rental economics7.1/40
gross yield 6.0%; range width penalty ×0.89
- valuation_snapshotsrent estimate 1300/mo (range 1200-1400)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -271/mo, -21% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 3 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 212 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 3 Nov 2026
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

£195,000£299,000

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£260,000

At the asking price

Monthly rent£1,300/mo

Evidenced range £1,200-£1,400

Interest rate5.4%

Loan to value75%

Cash required: £82,300
Net cash flow: £22/mo
Cash on cash: 0.3%
Score at this price: 23

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.48 - 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 10002009643Valuation edge · as of 9 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 14.4%Valuation edge · as of 4 Nov 2026
valuation_snapshotsrent estimate 1300/mo (range 1200-1400)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 3 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 3 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 1300/mo (range 1200-1400)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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£261,000

Rent Estimate (pcm)£1,300

Gross Yield6.00%

1y Growth-

3y Growth+3.2%

5y Growth+1.9%

10y Growth+2.9%

Last Sold Price£245,000 (2020-06-05)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonModerate
MiningSignificant
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0HP3 9GE

Approval Rate

-12mo

Development

low

26/02346/LDP
Loft conversion including hip to gable roof alterations, rear dormer window, Juliette balcony and velux windows to front elevation.
Pending
26/02344/ROC
Variation of Condition 3 (Approved Plans) attached to planning permission 26/01624/FHA
Pending
26/02279/FHA
Demolition of existing garage and erection of single storey rear extension and alterations to fenestration
Pending

View Planning Timeline

Ownership

Corporate Ownership60.3%
Overseas OwnershipNo
Lease Term Remaining100 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2020-06-05
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

7 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,473

Population Density8,394 /km²

Owner Occupied40%

Age Distribution

0-15 19%16-64 72%65+ 9%

View Area Profile

Schools Nearby

Two Waters Primary School
0.3 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
Nash Mills Church of England Primary School
0.5 mi
Good
Belswains Primary School
0.6 mi
Good
Tudor Primary School
0.9 mi
Good

5 of 14 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Harriet House London Road
-
£198k
-
Harriet House London Road
-
£221k
-
Harriet House London Road
-
£235k
-
Harriet House London Road
-
£239k
-

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