1 Hammerstone Lane, Northampton, NN4 8US

UPRN:15080354End Terrace House3 bedsBuilt 1976-1982

FreeholdCouncil Tax: Band BEPC: C (73)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 1mo agoArea· Census 2021

1 Hammerstone Lane, Northampton, NN4 8US

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

18 of 21 sources

Sale Estimate

£248,000

£236k - £260kHigh

Estimate

£248k

Range

£236k – £260k

Rent Estimate (pcm)

£1,250

£1k - £1k

Monthly

£1,250

Yield

6.00%

Verdict

Derived from HomePortfolio scores

1 Hammerstone Lane earns an INVESTIGATE rating with HP Score 70/100. Investment score 52/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (51/100). 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 covenantsHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

70/ 100

Mixed

Investment Score

52/ 100

Moderate

Crime Score

20/ 100

Moderate

Walkability

51/ 100

Moderate

Transit & Bike

Transit 17Bike 57

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 5 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 -0.8%, £/sqft -0.7%] → 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 13 Oct 2026
- valuation_snapshotsestimate for 15080354· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 9 comps, dispersion 19%· as of 5 Nov 2026
Rental economics7.7/40
gross yield 6.0%; range width penalty ×0.96
- valuation_snapshotsrent estimate 1250/mo (range 1200-1350)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -266/mo, -21% 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 5 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 43 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 & liquidity14.7/15
556 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

£187,500£287,500

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£250,000

At the asking price

Monthly rent£1,250/mo

Evidenced range £1,200-£1,350

Interest rate5.4%

Loan to value75%

Cash required: £78,800
Net cash flow: £22/mo
Cash on cash: 0.3%
Score at this price: 22

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 15080354Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 9 comps, dispersion 19%Valuation edge · as of 5 Nov 2026
valuation_snapshotsrent estimate 1250/mo (range 1200-1350)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

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 1250/mo (range 1200-1350)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 43 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£248,000

Rent Estimate (pcm)£1,250

Gross Yield6.00%

1y Growth+3.6%

3y Growth-1.7%

5y Growth+1.4%

10y Growth+3.0%

Last Sold Price£220,000 (2022-01-14)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonModerate
MiningUnknown
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0NN4 8US

Approval Rate

-12mo

Development

low

2026/4102/COND
Discharge of Conditions 3 [External Facing Materials], 4 [Boundary Treatment], 5 [Foul & Surface Water Drainage], 6 [Biodiversity Enhancement] and 7 [Refuse & Recycling Storage] of Planning Permission 2024/1268/FULL [New attached dwelling on land adjacent to 40 Axe Head Road at 40 Axe Head Road Northampton NN4 8TF]
Approved
2026/3839/NMA
Non material amendment to retain existing window previously proposed for removal, internal layout alterations inc. the relocation of an internal partition wall by approx. 150mm into the adjoining room and relocation of an internal door opening to planning permission 2024/1488/FULL [Proposed first floor side extension].
Approved
2026/3680/FULL
Conversion of existing dwelling into 3no. self-contained one-bedroom flats
Pending

View Planning Timeline

Ownership

Corporate Ownership60.2%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change2022-01-14
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

6 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£33,059

Population Density3,757 /km²

Owner Occupied72%

Age Distribution

0-15 23%16-64 63%65+ 14%

View Area Profile

Schools Nearby

Briar Hill Primary School & Nursery
0.3 mi
OutstandingImproving
Hunsbury Park Primary School
0.4 mi
Inspected as Hunsbury Park Primary School (URN 121952) on 27 Sep 2022
Delapre Primary School
0.8 mi
Good
Hospital and Outreach Education
0.8 mi
Good

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

View All Schools

Comparables

View All

15 Hammerstone Lane
-
£218k
-
50 Hammerstone Lane
-
£213k
-
7 Hammerstone Lane
-
£240k
-
26 Hammerstone Lane
-
£250k
-

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