17 Heron Mews, Hemel Hempstead, HP1 2EG

UPRN:10095348260Detached House4 bedsBuilt 2022

FreeholdCouncil Tax: Band FEPC: B (84)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoCrime· freshConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

HP Score

/ 100

Mixed

Verdict

2 days ago

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

Evidence

20 of 21 sources

Sale Estimate

£729,000

£693k - £765kHigh

Estimate

£729k

Range

£693k – £765k

Rent Estimate (pcm)

£3,000

£3k - £3k

Monthly

£3,000

Yield

4.90%

Verdict

Derived from HomePortfolio scores

17 Heron Mews earns an INVESTIGATE rating with HP Score 70/100. Investment score 70/100 reflects strong fundamentals. Crime intensity is low. Walkability is limited (24/100). 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)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 company ownershipHM Land Registry covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

70/ 100

Mixed

Investment Score

70/ 100

High

Crime Score

20/ 100

Moderate

Walkability

24/ 100

Low

Transit & Bike

Transit 5Bike 24

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 -0.8% (HIGH), sold-comps -7.8%, £/sqft -7.8%] → 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 10095348260· as of 9 Nov 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 3%· as of 9 Nov 2026
Rental economics0/40
gross yield 4.9%; range width penalty ×0.83
- valuation_snapshotsrent estimate 3000/mo (range 2700-3250)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,026/mo, -34% 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
context, not scored: 0 price cut(s), 50 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 10 Nov 2026
Risk & liquidity14.7/15
250 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

£551,000£845,000

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£735,000

At the asking price

Monthly rent£3,000/mo

Evidenced range £2,700-£3,250

Interest rate5.4%

Loan to value75%

Cash required: £248,550
Net cash flow: -£404/mo
Cash on cash: -1.9%
Score at this price: 15

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.21 - 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 10095348260Valuation edge · as of 9 Nov 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 3%Valuation edge · as of 9 Nov 2026
valuation_snapshotsrent estimate 3000/mo (range 2700-3250)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
portal_listingsprice_changes + first_published_dateSeller motivation · as of 10 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 3000/mo (range 2700-3250)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 50 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. 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£729,000

Rent Estimate (pcm)£3,000

Gross Yield4.90%

1y Growth-7.7%

3y Growth+0.0%

5y Growth+1.0%

10y Growth+2.9%

Last Sold Price£670,000 (2022-06-27)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonLow
MiningLow
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0HP1 2EG

Approval Rate

-12mo

Development

low

26/02472/DRA
Discharge of Schedule 9 Part 2 (Construction Traffic Management Plan) of the S106 Agreement attached to Planning Permission 4/03266/18/MFA (Barratt David Wilson Homes CTMP)
Pending
26/02466/DRA
Discharge of Schedule 9 Part 2 (Construction Traffic Management Plan) of the S106 Agreement attached to Planning Permission 4/03266/18/MFA (Taylor Wimpey CTMP)
Pending
26/02396/DRC
Details as required by Condition 15 (Highways details) attached to planning permission 4/03266/18/MFA
Pending

View Planning Timeline

Ownership

Corporate Ownership52.8%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change2022-06-27
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

22 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,473

Population Density-

Owner Occupied92%

Age Distribution

0-15 17%16-64 60%65+ 23%

View Area Profile

Schools Nearby

Westbrook Hay
0.7 mi
Inspected by ISI
Pixies Hill Primary School
0.8 mi
Good
Oakleaf Primary
0.9 mi
Inspected as Chaulden Infants' and Nursery (URN 117202) on 17 May 2023
Roman Fields Academy
1.1 mi
Outstanding

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

View All Schools

Comparables

View All

20 Heron Mews
-
£805k
-
16 Heron Mews
-
£600k
-
6 Heron Mews
-
£650k
-
1 Heron Mews
-
£580k
-

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